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ARMED SERVICES TECHNICAL INFORMATION AGENCYARLINGTON HALL STATIONARLINGTON 12, VIRGINIA

UNCLASSIFIED

NOTICE: When government or other drawings, speci-fications or other data are used for any purposeother than in connection with a definitely relatedgovernment procurement operation, the U. S.Government thereby incurs no responsibility, nor anyobligation whatsoever; and the fact that the Govern-ment may have formlated, furnished, or in any waysupplied the said drawings, specifications, or otherdata is not to be regarded by implication or other-wise as in any manner licensing the holder or anyother person or corporation, or conveying any rightsor permission to manufacture, use or sell anypatented invention that may in any way be relatedthereto.

PROGRESS REPORT NUMBER 21

- ,FOR

OCTOBER 1, 1962 TO NOVEMBER 30, 1962

DESIGN, DEVELOPMENT AND FABRICATION OFBAROSWITCH, REMOTE XM-1O; BAROSWITCH,PRESET XM-11; AND CONTROL BAROSWITCH

SETTING: XT-4126

CONTRACT NO. DA-36-034-ORD-2890-RD

FOR

PICATINNY ARSENAL, DOVER, NEW JERSEYATTN: FELTMAN RESEARCH AND ENGINEERING LAB

ORDBB - TV4 - PROJECT - TN2 - 8109

PREPARED BY:

aTHE BENDIX CORPORATION

FRIEZ INSTRUM{ENT DIVISION

BALTIMORE 4, MARYLAND

aDECEMBER 7, 1962

I

I


FOR

OCTOBER 1, 1962 TO NOVEMBER 30, 1962

DESIGN, DEVELOFMENT AND FABRICATION OFBAROSWITCH, REMOTE XM-1O; BAROSWITCH,PRESET XM-11; AND CONTROL BAROSWITCH

SETTING: XT-4126

CONTRACT NO. DA-36-034-ORD-2890-RD

FOR

PICATINY ARSENAL, DOVER, NEW JERSEYATTN: FELTMAN RESEARCH AND ENGINEERING LAB

ORDBB - TV4 - PROJECT - TN2 - 8109

PREPARED BY

THE BENDIX CORPORATIONFRIEZ INSTRUMENT DIVISION

BALTIMORE 4, MARYLAND

DECEMBER 7, 1962

REF:FR-9216732-0376


Period Covered: October 1, 1962 to November 30, 1962

Design, Development and Fabrication of Baroswitch, Remote XM-lO; Baroswitch,Preset XM-ll; and Control, Baroswitch Setting: XT-4126

Contract No. DA-36-034-ORD-2890-RD

DISTRIBUTION:

Four Copies Two Copies

Commanding Officer Commandinrf GeneralPicatinny Arsenal Army Rocket and Gui,.ed Mdssile A'er, cvDover, New Jersey Redstone Arsenal, AlabamaAttn: Purchasing Offive-ORDBB-PBI Attn: ORDXR-RD-Branch

One Copy Ten CopiesContracting Officer Armed Service Technical info AgencyPhiladelphia Ordnance District Document Service Center128 North Broad Street Arlington Hall StationPhiladelphia 2, Pennsylvania Arlington 12, VirginiaAttn: OD, R and D

One CopyOne Copy General Electric CompanyChief of Ordnance Missile and Space Vehicle Dept.Department of the Army 3198 Chestnut StreetWashington 25, D.C. Philadelphia 4, PennsylvaniaAttn: ORDTN-AE Attn: Mr. A. B. Bredikin

File Reference: 32-0376Customer Order No:DA-36-034-ORD-2690-RD

PROGRESS REPORT NMBER 21

DEVELOPMENT OF:

BAROSWITCH, XM-10BAROSWITCH, XM-11SETTER, XT-4126

I. INTRODUCTION

Included in this report is a discussion of the work done on thisproject during the period from October 1, 19o2 through November 30,1962. It includes the status of development of each of the twobaroswitches and XT-4126 Control Setter.

Also included in this report is a schedule for the work to be doneduring the period which follows this report period.

- 1 -

II. REPORT OF PROJECT ACTIVITIES DURING REPORT PERIOD

A. Baroswitch, XM-10

The investigation of contact materials recolmmended by H. A.Wilson Division, Engelhard Industries, Inc., as outlined in

Progress Report Number 20, has now been completed. An evalua-tion report of the H. A. Wilson contact materials has been pre-pared and is included as Appendix "I" of this report. 'The reportbears out the fact that the program is now capable of proceeding

with a high degree of confidence in baroswitch capabilities.

For convenience of comparison with previous results, a reporton the tungsten contact material, described in Progress Report

Number 20, is included as Appendix "2" of this report.

A selection of the 91%f platinum, 9%, tungsten alloy was made forthe contact material of all future XM-10 baroswitches. Thisselection was based on the following:

1. The 74., W - 20,) Re showed the poorest operatingcapabilities and was therefore eliminated.

2. The polarized configuration operatiig characteristics

almost equaled the 9"1 Pt ,W -- ritrct,, hoever,was eliminated due to the anticipated 'difficultiesof maintaining contact polarity. As -,!t:.jted in thetest report (Appendix "1"), it is ahsoJ'lltely necessarythat the 911' Pt - 91/, W contact be the anode and theY4% W - 260, Re be the cathode.

It should be noted that a number of ,apsules developed leaksafter a lar ;:e number of setting cycles. This problem had not

been present earlier in the program sinoe rio group of baroswitcheshad been subjected to such a large number of setting cycles. It

was established that the capsule leaks occurred in the brazematerial between tae capsule plate and joining bellows. Hcandyand Harman were consulted and suggested a new braze alloy,

Lithobraze BT. This alloy offers an increase of joint strengt, hby a minimum factor of 3, while providinj a better wetting action.

Nine plate and bellows assemblies were made and tested. One aasiem-bly developed a leak at 65 cycles due to a defective bellows. Thisleak did not occur in the braze but in the bellows itself. The re-

maining assemblies were subjected to three hundred setting cyclesand none developed any leaks. Picatinny Arsenal was advised ofthe test results and the drawing is in the process of being chanEed

to the Lithobraze BT. All baroswitches delivered in the future

shall have plate and bellows assemblies fabricated with LithobrazeBT brazing alloy.

2

II. REPORT OF PROJECT ACTIVITIES DURING REPORT PERIOD

A. Baroswitch, XM-1O

The investigation of contact materials recommended by H. A.Wilson Division, Engelhard Industries, Inc., as outlined inProgress Report Number 20, has now been completed. An evalua-tion report of the H. A. Wilson contact materials has been pre-pared and is included as Appendix "l" of this report. The reportbears out the fact that the program is now capable of proceeding

with a high degree of confidence in baroswitch capabilities.For convenience of comparison with previous results, a reporton the tungsten contact mate-ial, described in Progress ReportNumber 20, is included as Appendix "2" of this report.

A selection of the 91% platinum, 91% tungsten alloy was made forthe contact material of all future XM-lO baroswitches. This

selection was based on the following:

1. The 74<, W - 264{ Re showed the poorest operatingcapabilities and was therefore eliminated.

2. The polarized configuration operating characteristicsalmost equaled the 91%$ Pt - 9, W contacts, however,was eliminated due to the anticipated difficultiesof maintaining contact polarity. As ,itated in thetest report (Appendix "1"), it is absoPitely necessary

that the 91%' Pt - 9% W contact be the anode and the

74,4 W - 26% Re be the cathode.

It should be noted that a number of ?,apsules developed leaksafter a larg,,e number of setting cycles. This problem had not

been present earlier in the program since no group of baroswit.cheshad been subjected to such a large number of setting cycles. Ifwas established that the capsule leaks occurred in the bra2ze

material between the capsule plate and joining bellows. Handyand Harman were consulted and suggested a new braze alloy,

Lithobraze BT. This alloy offers an increase of joint strength,by a minimum factor of 3, while providing a better wetting action.Nine plate and bellows assemblies were made and tested. One assem-bly developed a leak at 65 cycles due to a defective bellows. Tnisleak did not occur in the braze but in the bellows itself. Tne re-maining assemblies were subjected to three hundred setting cyclesand none developed any leaks. Picatinny Arsenal was advised of

the test results and the drawing is in the process of being changed

to the Lithobraze BT. All baroswitches delivered in the future

shall have plate and bellows assemblies fabricated with Lithobraze

BT brazing alloy.

-2-

All baroswitches starting with SiN 006 will be of the X-IO -

XM-18 design. Since this design does not contain a linearizingmechanism to correct for the inherent error of the capsule assembly,it will be necessary to incorporate a padding resistor similar tothat used on the XM-18 baroswitch. The padding resistor has veryhigh resistance (Ca. 500K Ohms) and is connected between one endof the potentiometer and the potentiometer wiper. This resistorthen adds more correction at one end of the setting range than itdoes at the other end, which has the effect of strengtheningl theerror curve and at the same time increases the error at the encoof the setting range. The error at the end of the setting rangeis then corrected by means of the hinge mechanism in the elementassembly while still maintaining the correction characteristicsobtained by the padding resistor. The value of the padding re-sistors used to date range from 250K to 560K. The initial capsuleerror, in either plus or minus direction, determines which end ofthe potentiometer the resistor is attached. The addition of thepadding resistor has been discussed with Mr. Jack Woods, ProjectOfficer, Picatinny Arsenal, and will be added to the drawingsupon official acceptance.

At the present time three XM-10 baroswitches have been assembledand are in the process of final testing. All three baroswitchesdiffer from previously delivered XM-10 baroswitches as follows:

a. The latest design (XM-lO - )Uq-i6)

b. Cross contacts of 91% Pt - 9% W alloy

c. Plate and bellows assemblies brazed with lithobraze BTalloy

d. Contain padding resistors

No difficulties have been encountered to date with these threeXM-10 baroswitches and none is anticipated. It is expected thata total of five XM-10 baroswitches will be shipped during themonth of December.

The special vibration test using Robinson Aviation isolators,which was requested by Picatinny Arsenal, has now been completed.A complete report is included as Appendix "3" of this reportshowing all test data and conclusions.

-3-

B. Barosetter, XT-4126A

A total of' five XT-4126A barosetters have been delivered, leavin ':three to be delivered. All three of the remaining XT-412oA *aro-setters are now complete with the exception of the painting ofthe front panels and carrying cases. It is anticipated that allthree barosetters will be shipped during the month of' January.

Three complete sets of revised drawings have been deliveredwhich reflect all of the latest revisions and are to replaceprevious drawings at Picatinny Arsenal.

Work has been initiated on the writing of a Qualification TestProgram and will be submitted for approval prior to conductingthe test.

C. Summary

It now appears that the question of the vibration isolator isthe only remaining major problem existing in the XM-l0 baroswit.l.The vibration isolator problem should be resolved very shortlysince all of the required testing has been completed and thetest results have been submitted to Picatinny Arsenal.

No additional XM-1O problems are anticipated and regular deliveriesshould begin about the end of' December.

D. Man-Hours Expended During Report Period

During tnis report period, there have been expended approximately2320 hours on Eng,ineering and 1430 hours on Fabrication.

III. PROJECT PLAHNNI SCHEDULE FOR THE INXT REPORT PERIOD

A. Baroswitch, XM-10

1. Assemble and test XM-10 baroswitches for delivery.

2. Conduct snock test on XM-l0 baroswitch using specialRobinson Aviation isolators.

3. Resume writing of Mandatory Process.

- 4 -

B. Barosetter,_XT-,l ,i,^,

1. Complete and deliver remainin.g. three XT-412CuA barosetters.

2. Complete writing of Qualification Testing Program.

Prepared By: _ _,A ,I -W. . HughRe&IProject Engineer

Approved By: ________

Section H~2pecial Products (Iroup

5-

APPENDIX l

APPENDIX 1

REPORT ON EVALUATION OF H. A. WILSON CONTACT MATERIALS

INTRODUCTION:

Upon recommendation of Dr. Mooradian of Engelhard Industries, two newmaterials, a 75% tungsten - 25% rhenium alloy (W-Re), and 91% platinum -9% tungsten alloy with .25,'o thorium oxide added (Pt-W), were tried in the

cross-contact configuration of the XM-1O and XM-18 baroswitches to improveloop resistance and repeatability characteristics.

PROCEDURES:

Two baroswitches of each of the following configurations were assembledfor testing:

1. Units 8 and 11 had the W-Re contacts.

2. Units 9B and 12 had the Pt-W contacts.

3. On units 10 and 13 the Pt-W cortact was used as the anodeand the W-Re contact was used as the cathode. This is re-ferred to as the polarized configuration.

ASSEMLY DOCUMENTATION:

1. The contacts, as received, were .040" diameter wire .100"long. The tungsten wire had been cleaned and electro-polished, while the platinum wire was cleaned only.

2. The terminal posts were V-notched so that the workingsurface of the contact was mounted .156" + .001" fromthe face of the diaphragm. All contacts were brazed

with the resistance brazing iron.

3. The contact-diaphragm assemblies were cleaned as follows:The diaphragm and contact were scrubbed with Ajax and hotwater. Then they were ultrasonic-cleaned in a hydrocloricacid solution. Bright-Boy was used to clean the diaphragmlips, and each part was blown off with filtered air.

- 1 -

The tungsten contacts were polished with 4/0 emery paper.Then both contact types were polished with yellow rouge,using a hard wheel and then a soft wheel. The rouge was

cleaned from the contact stems and flanges using reagenttrichlorethylene. Following this, the assemblies wereultrasonically cleaned for six minutes in a trichlor-ethylene solution.

At this point, the tungsten contacts were electro-polishedto provide a mirror-like, check-free surface. Then bothtypes of contact-diaphragm assemblies were ultrasonic-cleaned in an alconox-ammonia-water solution. Upon removal

of the parts from the ultrasonic bath, they were immediatelyrinsed in hot water so as to prevent stains. Excess waterwas blown off with filtered air, and the parts were placed

in a drier at 160*F.

Operation No. A130 of the baroswitch production processfollowed:

Five minutes ultrasonic cleaning in trichlor-ethylene.

Blow dry with filtered air.

Two minutes ultrasonic cleaning in detergentsolution*.

Rinse in distilled water.

Tvo minutes ultrasonic cleaning in distilled water.


Two minutes ultrasonic cleaning in isopropyl alcohol.


*Detergent solution: 86 isopropyl alcohol, 20% distilled

water, .2, Renex 690 (by volume), .05i Span 80 (by volume).

- 2 -

Operation A70, a white room operation, was the last step beforewelding the diaphra:is to tie plate and bellows assembly.

Three minutes ultrasonic cleaning in trichlor-ethylene.

Blow dry with nitrogen.

Three minutes ultrasonic cleaning in previouslymentioned detergent solution, rince in distilledwater.

Three minutes ultrasonic cleaning in distilledwater.


Three minutes ultrasonic cleaning in isopropylalcohol.


The parts were dried for 20 minutes at 240'F in a vacuum ovenevacuated to 29 inches of mercury or better.

The parts were now ready for welding to the plate and bellowsassembly.

t . Plate and bellows assembly cleaning process: After brazing

the bellows and the exhaust tube to the capsule plates (anoperation which is still undergoing development), the assem-bly receives operation A30 as follows:

Ultrasonic cleaning in the following solutions:

5% ifydrochloric acid for two minutes

Distilled water for three minutes.

5'5 Sodium bicarbonate (water) for two minutes

Distilled water for three minutes

Excess water is blown off with filtered air, and the parts

are placed in a drier at 180*F.

-3-

Next the parts are checked with the Veeco Leak Test Fixture.The welding lands are machined, and the crimps on the exhausttubes are machined off to allow proper cleaning of the tubebores in subsequent operations.

Operation A80 of the Baroswitch process follows: An ultra-sonic cleaning in hot water for two minutes, followed by athorough rinse in hot water, and filtered air drying. Thenthe following series:

Ultrasonic clean for two minutes in reagent trichlorethylene,blown dry with filtered air, ultrasonic clean for two minutesin the following detergent solution: 80% isopropyl alcohol,20% distilled water, .2% Renex 690, .05'i Span 80. A distilledwater rinse, two minutes ultrasonic cleaning in distilled water,blown dry with filtered air, two minutes ultrasonic cleaning inisopropyl alcohol, blown dry with filtered air.

Finally operation A-70, previously described, is applied.

The parts are now ready for diaphragm welding.

5. Outgassing, purging and backfilling procedure (followingwelding operation): baroswitch production procedure #14was used on these baroswitches. The three operations weredone on the Veeco US-9 outgassing manifold. All capsuleswere done at the same time.

a. The units were outgassed for one and one-halfhours at 370°F while maintaining a vacuum of10 microns or less.

b. The units were backfilled to 2 PSIG, left idlefor ten minutes, and evacuated to 10 microns orless.

c. Step (b) was repeated twice. This completed thethree purge cycles.

d. The units were cooled to room temperature whilebackfilled with 2 PSIG of nitrogen. Then theunits were evacuated to 10 microns or less, andbackfilled to 35 mbs of nitrogen. The exhausttubes were crimped off, completing the back-filling procedure.

- 4 -

6. Binge post length was 1.00' - .004", as per print. Some ofthe posts were shortened to compensate for shallow bores inthe hinge post, caps, but. the effective hinge post length re-mained the same. The hinge post angle (number of degreesthe hinge post is rotated from a line through the centers of

the two hinge posts) varied considerably from element toelement. A change in tile hinge post angle moves the fulcrumf.rom which the element plates pivot when driven by the geartrain, thereby aiding in the rough ranging of the elements.

No stj'ims were required in obtaining parallel plates at mid-ranige (546.6 lbls).

7. Following the test series, the setter used was calibratedand found to be well within required tolerances.

8. The number of setting cycles performed by each gear trainis estimated at 1000 cycles per gear train.

DESCRIPTION OF TESTS:

A. Testing without contact scrubbing:

I. A full range room temperature test was conducted makingaltitude settings from both increasing altitude directionand decreasing altitude direction. Contacts were opened

durinf, altitude setting changes. The operating point ofcacli element was established noting the shift of operat-ing point. The maximum overpressure encountered by anyelement did not exceed 15 millibars more than the pressure

of the operating point.

2. A5 an altitude of 30,000 feet, 50 dives were taken, re-

cording each 10 dives. The altitude setting remainedat 30,000 feet during the loop resistance testing andthe maximum overpressure seen by any element did notexceed by more than 15 millibars the pressure of theoperating point.

3. Step 2 was repeated with an altitude setting of 25,000feet. The contacts remained open during the change from30,000 feet to 25,000 feet.

4. Three complete temperature tests including loop resistancereadings were taken. Contacts were open during all altitudesetting changes and maximum overpressure encountered by anyelement did not exceed 15 millibars more than the operating

point pressure.

- 5-

B. Testing with Contact Scrubbing:

I. With a manifold pressure of 1060 millibars during all settingoperations and temperature test procedures, the following wasconducted:

a. Ten scrubs (altitude setting cycles).

b. Room temperature test for repeatability andloop resistance.

c. 25 Scrubs.

d. Room teiiperature test for repeatability andloop resistance.

e. 50 Scrubs.

f. A complete temperature test repeatabilityand loop resistance.

g. 100 Scrubs.

h. Room temperature test for repeatability andloop resistance.

i. 100 Scrubs.

j. Room temperature test for repeatability andloop resistance.

2. The loop resistance of each element was determined at eachtemperature in the above procedure.

C. At. the conclusion of baroswitch testing the capsules on all switcheswere cut open so that the contacts could be examined and photographed.

Tests Performed on Each Unit:

1. Units 6 (W-Re), 9B (Pt-W) and 10 (polarized) weresubjected to the tests in category A.

2. All six units were subjected to the tests incategories B and C.

- 6-

RESULTS AID DISCUSSIONS:

Bar graphs showing distribution of repeatability and loop resistance datapoints for each test are appended. Table 1, showing representative operat-ing point shift, is also appended.

The tests prescribed in Part A, sections 2 and 3, (50 dives at 30,000 feetand at 25,000 feet), were to see if deformation of the contacts while div-ing at 30,000 feet would affect repeatability or loop resistance at 25,000

feet. Repeatability was not affected, although a slight (6,) increase inaverage loop resistance readings was noted.

The bar graphs show results as follows. For "B" type (scrubbing) tests,the tungsten contacts (units 8 and 11) have 87r of their repeatabilitypoints equal to or less than 0.5 mbs. The platinum contacts (units 9Band 12) have 96%l of their d-:ita points equal to or less than 0.5 mbs, andthe polarized contacts (units 10 and 13) show 94, of their data pointsequal to or less than this figure.

Loop resistance results for "B" tests are summarized below:

Percent of Data Points Equal to or Less Than:

Type of Contact Unit Numbers 0. 2 Ohms 0.4 Ohms

Tungsten 8 and 11 97%$ 100/Platinum 9B and 12 96.5% 100%Polarized 10 and 13 95 0051

The large number of high loop resistance readings on Units No. 8 and 10,Test A, was due to faulty test cables which were replaced, resulting inlow resistance readings for the remainder of the test runs.

Table I, sample operating point shifts, shows that operating point shiftis not excessive during cycling. Shift would be due to wearing of frictionsurfaces on the baroswitch, and other factors.

Figures 1, 2 and 3 show representative samplings of the three contact con-figurations after scrubbing tests.

- 7 -

A PP EN D IX "A"

TAB3LE i

OPIERATINRI POINT SHIFT DvrINi "B" rpypp TESTS

NOTE: Values listcd are deviations from mean in millibars.

Unit No. 8 (TRingsten Contacts)

Elern nt No. 1

No. of ScrubsAl titude Mean Set

SettinC (ft.) Point (Mb's) 10 37 95 197 305

1,000 973.5 +0.7 +0.3 -0.3 -1.2 +0.5

5,00 747.2 +1.9 +0.6 -2.2 -0.3 -0.1

15,000 568.3 +0.9 0 -0. -0.. +0.4

25, 000 372.8 +0.6 +(0.4 -0.3 -1.1 +0.5

4i, f0( 1.6 +1. G +1.0 -0.5 -1.7 0

5o,000 112.0 +0.3 +0.7 +0.1 -2.2 +i.0

Unit No. 9D (Platinum Contacts)

Element No. 1No. of Scrubs

Altitude iean SetSetting (ft.) Point (Urb'o) 10 37 95 197 305

1,000 979.7 +1.9 +0.1 -0.9 +0.3 -0.5

8,000 y5b.5 +0.5 -1.4 +C0.8 -0.5 +0.3

15,000 579.7 -0.7 +3.0 -1.6 +3.6 -1.1

25,000 376.8 -1.3 +3.2 -0.3 +2.2 -1.1

40,000 1.82.8 -1.0 +2.3 -1.0 +0.8) +0.2

50,000 116.2 -0.9 +1-.5 -1.0 +1.4 -0.1

-A-I -

Unit No. 9B (Platinum Contacts)- continued -

Element No. 2

No. of ScrubsAltitude Mean Set

Setting (ft.) Point (Mb'sl 10 37 95 197 305

1,00 976.4 +0.6 +0.6 -0.1 -0.2 -1.6

8,000 756.0 +1.0 +1.0 +0.4 -1.2 -1.5

15,000 577.4 +0.6 +0.9 +1.1 -0.6 -1.9

25,000 378.4 +o.4 +I1.1 +1.1 -1.0 -1.4

40,000 183.6 +0.4 +1.2 .-10.8 -1.0 -1.0

50,000 114.3 +0.5 +0.8 +1.3 -1.4 -1.0

Element No. 3

Altitude Mean Set

Setting (ft.) Point (Mb's) _0 37 95 197 305

1,000 974.5 +1.8 +0.7 -1.8 +0.7 -1i.

8,000 739.4 +1.2 +2.1 0 -2.0 -1.0

15,000 549.9 +2.1 +1.7 -0.5 -2.8 -2.3

25,000 345.0 +1.3 +0.4 -0.9 -0.8 0

4o,ooo 156.3 +1.8 0 -1.d +0.9 -1.2

50,000 119.8 +1.4 t0.4 -1.7 +1.0 -0.2

-A-2-

Unit No. 9B (Platinm= Contacts)- continued -

Element No. 4


Setting (ft.) Point (Mb's) 10 37 95 197 305

1,000 976.2 +0.1 0 +0.5 +0.8 +0.3

8,000 749.4 +0.2 +1.4 +0.7 +1.0 -5.2

15,000 569.0 +i.i +0.3 +1.6 +0.6 -6.3

25,000 370.8 +0.5 +1.2 +1.3 +2.2 -5-3

4o0,000 178.9 +0.9 -0.4 +0.6 +2.1 -4.8

50,000 108.7 +1.1 -0.9 +0.9 +2.7 -5.2

Unit No. 10 (Polarized Contacts)

Element No. 1


Setting (ft.) Point (Mb's) 10 37 95 197 305

1,000 975-7 -0.1 -2.1 +0.3 +0.7 +1.4

8,000 746.1 0 -0.1 +0.9 +0.1 -1.0

15,000 562.5 +0.1 +0.3 +0.3 -0.2 -0.7

25,000 362.7 -0.7 -1.5 +0.3 +0.8 +1.0

40,000 174.4 -0.8 -1.4 -1.0 +1.2 +1.8

50,000 112.1 -0.1 -0.9 -1.0 +1.3 +0.5

-A-3-

APPENDi1X "B"

9;'

1(0

H

0

I 1.9%

0-.2 .21-.5 .51-1.0REPEATABILITY - Mb's

NOTE: Element #2 Leaked After 172 Scrubs. New contactresistance connections added after third Room Temperature rm

I 39%

I 2 2

E-1H

I 1

0-.i .i1-.15 .i .0 21-. O0 .40-. 59

LOOP RESISTANCE - Ohms

Unit #b (T ngsten Contacts) Test A

I -B-I-

o 04.5%

~2.5%

00.5%

0-.2 .21-.5 .51-1.0 1.1-2.0 2.1-5.0 5.1-10.5

REPEATABILITY - Kb' s

NOTE: Element #2 Leaked After 172 Scrubs

E:1

0

5.. 5¢,

0-.1 .11-15 .16-20 .21,.28

I LOOP RESISTANCE -Ohms

Unit jh (Tungsten Contacts) Test B-B-2 -

F-

I IlL.5. 5;

.0-.2 .21-.5

RELPETTABILIIC - Mb's

NOTE Element Leaked After 172 Scrubs

I59-5b

1. %

l-. .i-1115 .16-. :0 2lo4 .41-.54

l LOOP RES7STANCE -Oms

Unit #'9P (Plat.inum (on-t.aci.s' Test. AI -T-3-

914

H0

1o50/

[- - 1 5%

0'-.2 .21-.5 .51-1.0 ,1-2.0 2.1-2.4

REPEATABILITY - Mb's

NOTE: Element -#42 Leaked After 172 Scrubs

49.5%

31.51'

I w

.0111-01

I j;

0-.2. .11-.15 .16,.20 .21-.28

I LOOP RESISTANCE -Olums

Unit #9B (Platinum Contacts) Test B

-B-4

HIH0

0

1.0 0.5%

0,. .21-. 5 51-


NOTES. New Contact Resistance Connections Added After Second Rm.Temperature Run. Element #4 Leaked After 120 Scrubs.

48- 5 ,

27. Ola

[ 4

12.o.

0

- -. i .11-.15 .- 16.20 .21-40 .41,75LOOP RESISTANCE - Ohms

Unit #10 (Polarized Contacts) Test A

I -B-5-

2.5% 2.51

0 o. 5 O'

0-.2 .21-.5 .51-1.0 1.1-2.0 2.1-5.0


NOTE: Element #4 Leaked After 120 Scrubs

I 23.5

H

ok lo

I2.

0-.1 .11-.15 .16-.20LOOP RESISTANCE - Ohms

Unit #10 (Polarized Contacts) Test BI -B-6-

12 ,

2.5o,

'--I

0-.2 .21-.5 .51-1.0 1.1-2.0 2.1-5.0

REPEATABILITf - Mb's

N0'±E: Element #2 Leaked after 268 Scrjbs

I s

H

110

6.;

0-.i .11-.15 .i6-.20 .21-.29


Unit /11 (Tungsten Contacts) Test B

-B-7-

64. 5,)

I 115-

205% 0.5%o

0-"2 .21i. 5 .5.-1.0 1.1-2.0 2.1-5.0 5.1-10.0BEPEATABILITY - Iv'

pI()TE: Element #2 Leaked after 78 ScrbsElement #4 Leaked after 85 Scruts

I '.50

Unt 4 t

5,f

0-I .Ji-.19 *16-._20 ._1-. 28

LOOP RESISTANCE - (Tins,tL2 'Platinum ContaCtr s ,ct ri

-B-8-

0-)rJ2EH

0.0

0- 5"(o ,O, .,0-.2 .51-1.0 1.1-2.0 2.1-5.0

REPEATABILITY - o'sNOTES: Element #1 leaked after 233 scrubts

Element #2 leaked after 170 scrubsElement #4 leaked after 270 scrubs

44 {,

I

o -x.i-11 15 -16- .2 .21-.4


Unit #13 (Polarized Contacts) Test B

-B-9-

A PP E ND IX "C"

A P P EN D 'I

FIRST RIEPORT ON i1UN1DEL CONTACT TESTS

11NTRODUC lIOD:

Becaus.e the tung,,sten cross -contac ts intended for the XM-10 and XM-18Baroswitches did not meet repeatability and loop 1'csistanc requirements,itter repeated contact scrujbbing, a test oro am was initiated to deter-mine whimt aissemuly teclniqueis c.ould provide ti-, best. contact characteristics.

DTSCU SSIOT OF CONTACT' PREPARATION AND ELE1VENT A SSEI4BLY:

Fifteen elements using' 20 rail diameter tungsten wire as on the first XM-18Daroswitc~cs produced with tungsten contacts ivere assembled in lots ofthree, Using the followi-ng, contact preparation procedures:

A. 20 Mil -tung"sten wire contacts at 90', surfaces not abraded.

D. 20 Mil tua-igsten wire contacts to -which a smooth 1" radiusof' cur-vature has been applied withl emcry paper, and polishedwith. rouge and a hiand-acid high-spped wheel.

C. Same as (B) except that the contacts are left in unpolishedcondition after the 1" radius has 'been generated.

D. Same -as (B) except th at the upper contact has not beenrotated so that thie angle 1between the contact s is now)450 instead of 90'.

E. Same us (B) exeept contacts on bothl uppez.r and lowershielves are to be rotated 90' from thle present configuration.

These 15 contact sets were prepared and assembled into element assembliesoriLginally designated for the X11-10 Ra.roswitch.

The 20 mul tung-sten wire was man~kfaCtared by Sylvania Electric, Towanda,Penn sylvan ia, and was purchased in 1957. It is 'Type 11330, with a unitweighat of 780.00 inC/200 mm and is from lot no. AW 915-38GAAA.

DJSCUSSIT OF TESTING PROCEDURE:

The capsles were assembled into four XM4-l0 Baroswitcties (no two alikecapsules to a switch) in the following arrang-ement:

Figure 1. Unit #11, Element-#4 (tungsten contacts) after Test "B".

Figure 2. Unit #12, Element #4 (platinum contacts) after Test "B".

Figue 2 Unt 112,Eleent~4 plInu otcs fe et""

I

Figure 3. Unit #13, Element #4 (polarized contacts) after Test "B".Platinum anode is on left, tungsten cathode on right.

-C-2-

BAROSWITCH IUMBER

Element No. 1 3 4

1B E B3 D3

2 Dl B2 C3 E3

3 Cl C2 E2

4 Al A 2 D2 A3

All elements had a 35 mb nitrogen backfill, and all baroswitches were roughranged prior to testing. Baroswitches number 1 and 3 (elements Al, Bl, B3,CI, (3 DI, D2, and E2) were overpres ured 4 lbs. at 1000, 25,000 and 50,000

feet, and baroswitches number 2, 3, and L (elements A2, A3 , B2, B3, C2, C3,

D9, DJ, El, E2, and E3) were outgassed prior to backfilling. Then the baro-

switrlhes were subjected to repeatability and loop resistance tests, as out-lined below. F or Baroswitch Number 1, the altitude changes were made withthe contacts open during the first five temperature cycles. For the re-mainder of cycles on Baroswitch Number 1, and all cycles on the other threeswitc es, altitude changes were made with the contacts closed (scrubbing).A scrub is defined as an altitude change from 1,000 feet to 50,000 feetand back to 1,000 feet with the contacts closed.

OTJTLTI\NE OF BAROSWITCH TESTING PROCEDURES:

1. Room Temperature Runs

A. Three operating point readings were taken for each elementat altitude settings of 1,000, 8,000, 15,000, 25,000, 40,000,

and 50,000 feet. Repeatability was taken as the greatest

difference between the readings at an altitude setting fora given element.

D. Loop resistance was measured at altitude settings of 1,00025,000, and 50,000 feet for each element with 3 mb over-pressure on the contacts.

II. Runs at -650F

A. Steps IA and IB were repeated at -65'F.

III. Runs at +1600 F.

A. Steps 1A and TB were repeated at +160 0F.

IV. Room Return Temperature Runs

A. Steps TA and IB were repeated at room temperature.

The above schedule was repeated four to eight times for each baroswitch.In going from one temperature cycle to another without interruption, theroom return run of the preceding cycle was used as the room temperaturerun of the following cycle. Also, at the project manager's discretion,10. 25, or 50 additional scrubs were added to the baroswitch elementsbetween Temperature cycles.

DISCUSSION OF TEST RESULTS

A synopsis of test results is given as Tables i and II. Table I gives acomparison of all elements with regard to t.he percent of data pointsgreater than 0.5 mb on an. element's repeatability curve, and percent ofdata points greater than 0.2 ohms and 0.4 ohms are given for each loopresistance curve. Table II shows the distribution of data points takenduring scrubbing which are greater than 0.5 mb., 0.2 ohms or 0.4 ohmsairong the three temperature conditions of the test.

inspection of Table I shows that element B1 ( contacts in standard orienta-tion, 2" radius and polished, overpressured and 5 no-scrub cycles) hasgood repeatability and resistance characteristics. The other two B-typeelements are poor in repeatability. Those elements which received over-pressure and/or no-scrub cycling usually showed better characteristicsthan those which did not. The B and C-type elements showed the best loopresistance characteristics, and the A-type elements were best in repeat-ability.

Table II shows no recognizable pattern in repeatability versus temperaturecharacteristics, and a slight increase in the percent of high loop resist-ance readings with an increase in temperature (noted in the greater-than-0.2 ohms column), as would be expected from the increased resistance ofthe baroswitch circuits at higher temperatures.

CO CLUSIONS

The amount of cold working (overpressure, no-scrub cycles) the tungstencontacts receive is indicative of how well they will perform in the scrubtests. The otherwise lack of data correlation would indicate that poorresistance and repeatability is due to something which all elements weresubject to during all. tests, the high contact pressures during scrubbing.

TABLE I

PERCENT OF DATA POINTS GREATER THAN 0.5 MBS,

0.2 I- IS OR o.4 OHMS DURING SCRUBBING

ELEMENT PERCENT GREATER PERCENT GREATER THAN TOTAL NUMBER

NUMBER THAN .5 MB 0.2 OHMS - 0.0H1v OF SCRUBS

Al (OP, NSC)* 12.5% 4o% 0% 110

A2 (OG) .0% 19% 4% 126

A 3 (OG) 34% 66% 37% 130

B1 (OP, NSC) 11.3% 3% 0% 110

B2 (OG) 45.5% 35% 10% 126

B 3 (OP, OG) 58% 31% 13% 118

C1 (OP, NSC) 21% 22% 0% 110

C2 (OG) 22% 10% 4% 126

C 3 (oP, oG) 47% 4o% 19.5% 118

D1 (oP, NSC) 4o% 64% 24% 110

D2 (oP, OG) 51.5% 19.5% 11% 118

D3 (OG) 29.5% 14.5% 8% 130

E1 (oG) 67% 12% 2% 126

E2 (OP, OG) 33% 37.5% 15.5% 118

E 3 (OG) 46% 55% 27% 130

OP = Overpressured 4# @ 1,000 feet, 25,000 feet, 50,000 feet.

OG = Outgassed

NSC = No Scrub Cycles. Elements were temperature-cycled five timeswith contacts opened during altitude setting changes before any

scrubs were added.

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SECOND REPORT ON TUNGSTEN CONTACT TESTS

INTRODUCTION

Following tests on 15 capsules with tungsten contacts, a second seriesof tests was conducted with General Electric .040" diameter tungstenwire. Also, further testing was done on Baroswitch #1.

DISCUSSION OF CONTACT MATERIALS AND CAPSULE PREPARATION

Three baroswitches (Nos. 1, 5, and 7) were prepared and tested follow-ing those tests described in Report No. 1. Baroswitch No. 1, which hadreceived 110 scrubs in the first test series, was not altered exceptfor an outgassing between the test series. Baroswitch No. 5 consistedof four identical capsules with G.E. No. 218, .040" diameter tungstenwire contacts, and baroswitch No. 7 had four identical capsules withG.E. .040" diameter tungsten wire contacts with 2% thorium oxide. Bothcontact materials were subjected to a centerless grinding operation atthe factory, and the surfaces were not further abraded at Bendix Friez.All capsules in baroswitches Nos. 5 and 7 were purged and outgassed asper the 1312 baroswitch outgassing procedure.

TESTING PROCEDURE

Baroswitch No. 1 was subjected to five additional temperature-altitudecycles, as defined in the Testing Procedure section of Report No. 1.The first run was made with contacts closed during altitude settingchanges, bringing the total scrub count to 118 on these contacts. Thelast four temperature altitude cycles were made with contacts open.

Baroswitches Nos. 5 and 7 received identical tests, outlined as follows:

1. A complete temperature-altitude cycle, as previously defined,was made with contacts closed during altitude setting changes.Then, a room temperature run was made, and 25 scrubs were added(total of 38 scrubs). Another room temperature run was madeand 50 scrubs were added (total 90 scrubs). Then another com-plete temperature-altitude cycle was made, bringing the scrubtotal up to 98. Loop resistance was taken after each repeata-bility test.

2. The elements were set at 30,000 feet, and capsule pressure wascycled from 1000 mbs. to 0 mb. and back to 1000 mbs. (roughly).This step was repeated 50 times with loop resistance readingstaken after each 10 dives.

.-- , \\\\ ',\.? \\\Q\\

3. Step 2 was repeated witn altitud- settings of 25,000 feet. Thecontacts were opened during the altitude setting change from30,000 feet to 25,000 feet. The purpose of steps 2 said 3 were tosee if the contact materials wolId be deformed enough during thedives at 30,000 feet to adversely affect repeatab:lity and loopresistance readings at 25,000 feet, which represents a spot ad-jacent to the 30,000 foot sett:ing on the contact diameters.

4. Following steps 2 and 3, the test procedure was as follows:

After the 100 dives, repeatability and loop resist-ance were taken at room temperature. Then 200 scrubswere added (a total of 200) repeatability and loopresistance were again taken, and 200 more scrubs wereadded (a total of 302). Then a complete temperature-altitude cycle was made, with loop resistances takenafter repeatability tests, to total 309 scrubs.

RESULTS AND CONCLUSIONS

Table I, showing percent of data points greater than. 0.5 m'b., 0.2 ohms, or0.4 ohms for steps 1 and 4 of the testing procedure for baroswdtches Nos.5 and 7, is attached.

The results of testing on baroswitch No. 1 are comparable to those testsdescribed in Report No. I, ex:.ept for an improvement i, repeatability andloop resistance for element CI.

The results of steps 2 and 3 irn the Procedure section are as follows-

Baroswitch No. 5 showed an increase from 0.C mb. averafz repeatability at30,000 feet to 0.26 mb. average repeatability at 25,000 feet. BaroswitchNo. 7 showed a decrease from 0.8 mb. average repeatability at 30,000 feetto 0.6 mb. at 25,000 feet. Average loop resistance readings are given below:

Baroswitch No. = Baroswitch No. 730,000 ft. setting .07 ohms averagF .:3 ohms average25..000 ft. setting .09 of-mrs arerage .a5 ohms average

The force applied to the contactz durfig these tests, approximately a halfan atmosphere maximuam overpressure witr. no scrubbing action, was not theworst condition the contacts were satjected To; i.e., nearly a full atmos-phere maximum overpressure with scrubbi.rg acti,! duTing repeatability tests.

Table I shows that Baroswitch No. 5 has good repeatability and fair loopresistance, and Baroswitch No. 7 has fair loop resistance and fair repeata-bility. Data was influenced by two elements in baroswitch No. 5 leakingbefore testing was half complete.

TABLE I

PERCENT OF DATA POINTS GREATER THAN 0.5 MB,0.2 OILMS OR 0.4 OHMS DURING SCRUBBING

Percent Greater Than:Total Number

Baroswitch No. 5 0.5 mb. 0.2 ohms 0.4 ohms of Scrubs

Element No. 1 0% 16.5% 0% 89*

Element No. 2 0% 14% 5.5% 299*

Element No. 3 4.5% 18% 3% 129*

Element No. 4 5.5% 8.5% 0% 309

Baroswitch No. 7

Element No. 1 1% 25% 4% 309

Element No. 2 19% 6% 0% 309

Element No. 3 3% 25% 0% 245*

Element No. 4 34% 8% 2% 309

*Capsules developed leaks at this point.

A P P E I~ D I X 3

IIIII

File Ref: 32-0376-6Contract No: DA-36-O34-ORD-2890-RD

VIBRATION TEST ON XM-10 BAROSWITCHES

USING ROBINSON EXPERIMENTAL MOUNTS

INTRODUCTION:

This report is submitted to Picatinny Arsenal to provide information onrecently conducted vibration tests requested by Picatinny Arsenal. Datais presented in tables and graphic form, and a summary analysis of thedata is included.

TEST EQUIPMENT AND PROCEDURES:

The XM-1O units used in this test, Serial Nos. 0064-E2 and 0066-E2, con-tained platinum-iridium button contacts with approximately 3/4" radius.Both switches had been used in previous vibration tests. The mounts usedwere isolators from XM-18 shock mounts (items 2-9, Ordnance Drawing8833173) on side plates designed for the XM-1O Baroswitch (Ordnance Draw-ing 1144704). One set of mounts was made and used for both baroswitches.Testing was started on 11/22/62 and completed on 11/29/62. A synopsis

of the testing procedure is as follows:

A. Vibration Inputs:

5-15-5 cps at 0.35" D.A. constant

15-2000-15 cps at 4g's constant

B. Sweep Times:

Four minutes, 10 minutes (each sweep time encompassingboth inputs)

C. Altitudes:

10,216 ft. (3114 meters) (691 mb)

20,187 ft. (6153 meters) (462 mb)

49,995 ft. (15,238 meters) (116 mb)

D. Orientations:

X-2 Axis, Y-2 Axis, Z-1 Axis (stated axis pointed upward -

See Figure 1).

Figure 1

E. Contact Setting:

Contacts were set open 6 mb, test was conducted. If necessary,contacts were opened in increments of 2 rib until contact clos-ures were eliminated. Contacts were set closed 6 mb, testconducted.

F. Sequence followed during vibration testing

SEQUENCE FOLLOWED DURING VIBRATION TESTING

Test UnitNo. No. Axis Sweep Time Altitude

1 0064-E2 X-2 4 Min. 10,216 Ft.2 004-L2 X-2 10 Min. 10,216 Ft.3 OO4-E2 X-2 4 Min. 20,.187 wt.4 0064-E2 X-2 lu Min. 20,18T Ft.

5 0064-E2 X-2 4 Min. 49,995 Ft.6 0064-E2 X-2 10 Min. 49,995 Ft..7 0064-E2 Y-2 4 Min. 10,216 Ft.8 0064-E2 Y-2 10 Min. 10,216 1,'t.

9 0064-E2 Y-2 L Min. 20,187 Ft.10 0064-E2 Y-2 10 Min. 20,187 Ft.11 0064-E2 Y-L 4 Min. 49,995 Ft.12 0064-E2 Y-2 10 Min. 49,995 Ft.

13 0064-E2 Z-1 4 Min. 10,216 Ft.14 0064-E2 Z-1 10 Min. 10,216 Ft.15 0064-E2 Z-1 4 Min. 20,187 Ft.16 0064-E2 Z-1 10 Min. 20,187 Ft.

17 0064-E2 Z-1 4 Min. 49,995 Ft.18 0064-E2 Z-1 10 Min. 49,995 Ft.19 0o66-E2 Y-2 4 Min. 10,216 Ft.20 0066-E2 Y-2 10 Min. 10,216 Ft.

21 0066-E2 Y-2 4 Min. 20,187 Ft.22 0066-E2 Y-2 10 Min. 20,187 Ft.23 0066-12 Y-2 4 Min. 49,995 Ft.24 0066-E2 Y-2 10 Min. 49,995 Ft.

25 0066-E2 Z-1 L Min. 10,216 Ft.26 0066-E2 Z-1 10 Min. 10,216 Ft.27 0066-E2 Z-1 4 Min. 20,187 Ft.28 O066-E2 Z-1 i0 Min. 20,187 Ft.

29 0066-E2 Z-1 4 Min. 49,995 Ft.30 0066-E2 Z-1 10 Min. 49,995 Ft.31 oo66-E2 X-2 4 Min. 10,216 Ft.32 0066-E2 X-2 10 Min. 10,216 Ft.

Test UnitNo. No. Axis Sweep Time Altitude

33 0066-E2 X-2 4 Min. 20,187 Ft.34 0066-E2 X-2 10 Min. 20,18? Ft.35 0066-E2 X-2 4 Min. 49,995 Ft.36 oo66-E2 X-2 10 Min. 49,995 Ft.

G. Readout Equipment:

A 28 VDC, 40 micro-ampere load was impressed across eachcontact. Contact closures were monitored with readoutequipment which filtered out closures of 50 microsecondsor less.

H. Mount Transmissibility:

Transmissibility tests were made prior to contact chattertesting in the specified axes.

RESULTS:

Attachment No. 1 presents contact chatter data in tabular form. Descriptivesymbols used are defined below:

NC = No contact chatter.

Hold -6 = Holding contacts open by 6 mb.

Hold +6 = Holding contacts closed by 6 mb.

NT = Not a valid test. Reasons explained in Discussion Section.

28-37, etc. = Constant or near constant chatter from 28 cpsto 37 cps.

31,1700, etc. = Isolated chatter at these points.

Set Point = Actual pressure reading -here contacts indicateclosure.

Graphs plotting contact chatter vs. frequency for each testare attached.

Mount transmissibility information is tabulated in Attachment No. 2.All information is for the same set of mounts, taken with two differentbaroswitches. Graphs of transmissibility vs. frequency are attached.

DIS('USSION AID CONCLUSIONS:

The absence of test data from Element -7pl, Ba-roswitch A#066, during- tests23 through 16, was due to a snort circuit in trie capsule, necessitatinin cutting away the electrical leads to the capsule so tnat, the shortwould not affect chatter data..

A comparison between the results of t.his test prog<ram and tne progrnsdescribed in reports to Picatinnv Arsenal ciated June iB, 1962, by K. D.Shaub, and September 24, 1962 b D. MA. Potter, (the latter reports describesimilar vibration testing with the same two baroswitch-eE, using XM-10 Lordmounts), shows favorably for the Robinson mounts in' several respects.

1. Elimination of the wide chatter bands prevalent duringX and I axes testing wit,h the Lord mouts.

2. A shift in the mount resonant point to tre 30-40 cps range,and reduction in the maximum I axis transmissioility from7/1 to 2.4/1. The shift. in resonance point, was accompaniedby a narrow bandwiith on the peak transmissibllity spike(see attacned graphs).

3. Elimination of chatter in the Z axis.

A comparison of like tests on the two switcnes, particularly tests 1-6and 31-36 (X-axis), shows progressively worsening data from the mountsas vibration time increased. This is borne out by the tabulated trans-missibil ity data.

Inspection of the mounts showed indication tnat the switches Viere stri.k-ing the cushion cups (item b, Ordnance Drawing bb-li2) It could notbe shown that this was being done during specitaca.tion vibration testin g,so the spacing of the isolators is termed marginally adequate. However,any available space should be utilized in. extending the isolators alongthe X or Y axes of tne baroswitch.

ATTAC IMEINT' NO. 1

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ATTACHMENT NO. 2

Transmis sibilityRobinson ExperimentalMounts on XM-1O Baro #0o64-E2

4 G's Constant Input

(X-2) (Y-2) (Z-1)

CPS G's Out Trans. CPS G's Out Trans. CPS G's Out Trans.

15 4.3 1.1/i 15 4 i/i 15 4.8 1.2/1

25 6.6 1.65/1 25 5 1.25/1 25 6.8 1.7/1

30 11.5 2.9/1 30 6.3 1.58/1 30 8.5 2.12/1

(max.)

35 8.6 2.15/1 37 8.2 2.05/1 36 10.1 2.52/1(max.) (max.)

45 4.9 1.22/1 40 6.4 1.6/1 40 5.6 1.4/1

55 3.2 0.8/1 50 4.3 1.07/1 50 4.4 1.1/1

75 2.0 0.5/1 75 2.1 0.525/1 75 3.7 0.925/1

100 1.5 0.38/1 100 3.0 0.75/1 100 3.3 0.825/1

200 .68 0.17/1 200 2.8 0.7/1 200 1.8 o.45/1

300 .48 0.12/1 300 1.1 0.275/1 300 .92 0.23/1

4o 1.4 0.35/1 400 .48 0.12/1 40o .63 0.158/1

450 3.1 0.78/1

500 .80 0.20/1 500 .53 0.132/1 500 .46 0.115/1

600 .41 0.10/I 600 .45 0.113/1 600 .56 0.14/1

700 .3 0.075/1 700 .45 0.113/1 700 .60 0.15/1

800 e.1 (0.025/1 800 .45 0.113/1 800 .64 0.16/1

(X-2) (Y-2) (z-1)


900 .1 0.025/1 900 .9 0.225/1 900 .90 0.225/1

1000 .21 0-05/1 1000 .43 0.108/i 1000 .64 0.16/1

1100 .1 0.025/1 1100 .27 0.068/1 1100 .29 0.073/1

1200 .1 0.025/1 1200 (1 <.0.025/1 1200 .1 <0.025/1

1300 <.1 <0.025/1 1300 .11 0.028/1 1300 -17 0.043/1

i4oo <.1 (0.025/1 1400 .14 0.035/i 1400 .12 0.03/1

1500 (,.l <0.025/i 1500 .27 0.068/i 1500 4(.1 (0.025/1

1600 /(.1 (0.025/1 1600 .24 0.06/i 1600 .1 0.025/1

1700 (.1 <0.025/1 1700 .12 0.03/1 1700 /,.1 40-025/1

1800 4--l < 0.025/1 i800 .5 0.125/1 1800 <-1 <0.025/i

1900 <.1 (0.025/i 1900 (.1 < 0.-025/1 1900 .l1,( 0.043/1

2000 <.1 <0.025/1 2000 .16 0.04/1 2000 .12 0.03/1

TransmissibilityRobinson ExperimentalMounts on XM-10 Baro-#0066-E2

4 G's Constant Input

(X-2) (Y-2) (z-1)

CPS G's Out Trans. CBS Gts Out Trans. CBS G's Out Trans.

15 4i.7 1.18/1 15 4.8 1-2/1 15 5 1.25/1

25 5-6 1.4/1 25 6.7 1.67/1 25 5.3 1-32/1

30 10.5 2.62/1 30 8.3 2.08/1 30 7.2 1.8/1

37.5 12.3 3-1/1 33 9-5 2.37/1 34 7.5 1.9/1

(max.) (max.) (max.)

(X-2) (Y-2) (Z-1)


40 ii.0 2.75/1 40 5.3 1.32/1 4o 5.8 1.45/1

45 6.4 1.6/1

50 3.3 0.825/1 50 4.0 1.0/1 50 4.3 1.08/1

75 1.7 o.425/1 75 3.3 0.825/1 75 3.0 0.75/1

100 2.4 o.6/1 100 3.4 0.85/1 100 2.6 0.65/1

200 2.1 0.525/1 200 i.6 o.4/1 200 1.7 o.425/1

300 2.5 0.625/1 300 1.1 0.275/1 300 1.0 0.25/1

400 1.1 0.275/1 400 .70 0.175/1 400 •55 0.138/1

500 .31 0.078/1 500 .60 0.15/1 500 .38 0.095/1

600 .26 O.065/1 600 .50 0.125/1 600 .49 0.122/1

700 .12 0.03/1 700 .46 0.115/1 700 .44 0.11/i

800 .14 0.035/1 800 .49 0.122/1 800 •75 O.188/1

90o .40 o.4/i 900 .80 0.2/1 90 .22 0.055/1

1000 .13 0.033/i 1000 .53 0.132/1 1000 .18 0.045/1

1100 .11 0.028/1 1100 .24 0.06/1 1100 (.1 ,0.025/1

1200 .13 0.033/1 1200 <.1 e_0.025/1 1200 <.l <0.025/1

1300 .12 0.03/1 1300 .18 o.o45/1 1300 .13 0.033/1

1400 .18 0.045/1 1400 <.l i 0.025/1 1400 .14 0.035/1

1500 .16 O.04/1 1500 (.1 e(0.025/1 1500 <.1 <0.025/1

1600 .17 O.043/1 1600 <-l < 0.025/1 1600 .11 0.028/i

(X-2) (Y-2) (Z-1)

CPS G's Out Trans. CPS CIS Out Trans. CPS G's Out Trans.

1700 .27 0.068/1 1700 .1 0.025/1 1700 .2 0.05/1

1800 .16 0.04/1 1800 .12 0.03/1 1800 .12 0.03/1

1900 .2 0.05/1 1900 .13 0.033/1 1900 .14 0.035/1

2000 .13 0.033/1 2000 .14 0.035/1 2000 .11 0.028/1

I -A

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