sep 2012 lesson 7.2 power pilot flight computer. reference from the ground up chapter 7.5:...
TRANSCRIPT
Sep 2012Lesson 7.2
Power Pilot
Flight Computer
Reference
From the Ground Up
Chapter 7.5:
Navigation Problems
Pages 197 - 207
Introduction
• The E6-B flight computer is used for many flight-related calculations and conversions.
• The flight computer will be used extensively during pilot training, and is very useful for flight planning and in-flight calculations.
Outline
• Time, Distance, & Speed• Unit Conversions• Groundspeed & Heading
E6-B Flight Computer
• The E6-B flight computer is used for many flight-related calculations and conversions
Time, Distance, Speed
• Set marker to speed (example: 80 knots/mph/etc)
• Read distance on outer scale
• Read time on inner scale
Time, Distance, Speed
• Set at 80 knots:– Dist of 40 NM =– Time of 30 min
Time, Distance, Speed
• Set at 80 knots:– Dist of 160 NM =– Time of 120 min– Time of 2 hrs
(hour scale useful over 60 minutes)
Unit Conversions
• Nautical miles to/from statute miles:– Line up NAUT arrow
with STATUTE arrow– Read knots/NM on
outside– Read MPH/SM on
inside
• Example:– 61 NM =– 70 SM
Unit Conversions
• Statute miles to/from kilometers:– Line up STAT arrow
with KM arrow– Read MPH/SM on
outside– Read km/h/km inside
• Example:– 56 SM =– 90 km
Groundspeed & Heading
• When determining your required heading (corrected for wind) and resulting groundspeed for a cross-country flight, use the following procedure on the back of the flight computer:– Rotate circle so the wind direction is under “True Index”– Use a pencil to make small dot straight up from centre hole,
using vertical scale to measure airspeed (in knots)– Rotate circle so the true track is under “True Index”– Slide back-plate so that pencil dot is on horizontal line that
matches true air speed (TAS)– Read wind correction angle on vertical line under the pencil
dot (left of centre = -, right of centre = +)– Read groundspeed under centre hole
Groundspeed & Heading
• Example Problem:Track = 040º trueVariation = 12º eastDeviation = 4º westTAS = 115 knotsWind = 160º true at 25 knots
What is the resultant ground speed and compass heading to maintain track?
Groundspeed & Heading
1. Wind Direction:– Set 160º under
true index
2. Wind Speed:– Mark dot 25 knots
up from centre
25
Groundspeed & Heading
3. True Track:– Set 40º under true
index
4. True Air Speed:– Slide wind mark to
115 knots line 115
Groundspeed & Heading
5. Wind Correction:– Read wind
correction angleof +11º
6. Ground Speed:– Read resulting
ground speed of126 knots
11
Groundspeed & Heading
7. True Heading:– Add wind correction (+11º) to track (40º)– = 51º true heading
8. Compass Heading– Convert true heading to compass heading using variation
(12º E) and deviation (4º W): TVMDC– 51º + (-12º) + 4º = 43º
• Final Answer:– Groundspeed = 126 knots– Compass Heading = 043º