Sikorsky CH-34C Specification

Rotor Diameter 17.06 mFuselage length 14.17 mHeight 4.8 mEmpty Weight 3480 kgPowerplant 1525 hp Wright R1820-84 Cyclone air-cooled engineArmament NoneSpeed 172 km/hService Ceiling 2890 mRange 511 kmCrew 3

History and use

In 1952, US Navy wished a helicopter for anti-submarine fight more modern than S-55 (H-19). TheSikorsky firm then conceived the S-58 (H-34), which accomplished its first flight on 8 Mars 1954.

This machine took again the formula which had made the success of its elder with many improvementson the fuselage shape and on the transmissions.

The first standard aircraft was ready in September of the same year and entered in service immediatlyfor US Navy in HSS-1 version. US Army and US Navy crpos respectively ordered it in 1955 and1957.

In France, to face the needs for Algeria war, Sud Aviation assembled 135 H-34 and built 166 other underlicence.

Conceived like submarine killer, H-34 was mainly used as a military transport helicopter. It was largelyemployed by the Americans inViêt-nam, under the name "Choctaw", for troops transport.

It was also used by France in Algeria war initially like troops transport. It constituted a privileged target at thistime. However, the tenacity ofColonel Brunet made of it a ground and attack support helicopter, called "Pirate", equipped with a heavyarmament. So it became lessvulnerable and much more dreaded.

S-58 was used a little in civil version.

Source materials:H-34 Chockaw in action

Aircraft No 146Squadron/signal publicationsBy Lennart LundhICBN 0-89747-319-1

ASSEMBLY INSTRUCTION The proposed Sikorsky CH-34C 1/32 scale model despite relatively easy to be build, is with high level of similarity to the prototype. Thus, a special attention and precision in the assembly procedure is required. Study carefully the illustrative drawings, cutouts and present instruction before starting the work on the model. See also the pictures on the back cover that illustrate the assembly process. Try to imagine the separate assembly phases and the purpose of each detail.

After the acquaintance with the model, you may start the assemblage. Follow the sequence given in the instruction. Cut the necessary details shortly before using them in order to avoid possible mistakes. Score all fold lines before cutting the details. The places of scoring are marked with small thin lines on the continuation of fold lines outside the parts. The scissors markings show where to make cuts on some details.

Do not be in a hurry with gluing - carefully check and shape the details until obtain the exact and correct fit. Before starting the work get hold of the necessary tools: scissors, sharp modeling knife, blunt knife for scoring the fold lines, prickle, ruler, nippers and grinding paper. Additional materials necessary for the assemblage are: few sheets of cardboard with thickness approximately 0.5 mm, a piece of wire with diameter 0.5 - 0.8 mm, transparent foil for the canopy. Supply with proper glue. BISON Clear Adhesive, UHU or similar are recommended as the most appropriate ones. Water based glue is not recommended.

Preparation for assembling includes gluing the pages that contain the formers and strengthening elements on 0.5 mm cardboard.

Start from the fuselage frame as it is shown on view A of the instruction drawings. Follow the number sequence of parts during frame assemblage to avoid puzzle-like situations. When the fuselage frame is ready you must choose the interior variant. It can be with 11 seats for troop transportation or with 8 litters and one seat for medevac variant. You can omit the interior parts at all for cargo variant.

After adding the cockpit interior parts – pilots seats, controls, instrument panels and interior parts – fire extinguisher 26 on part 2, seats and/or litters to the fuselage frame you must cover it with the fuselage skin 28.

Carefully prepare the part 28 before gluing it. Cut the windows and door areas, and optionally the holes of the fuel tank orifices 28d. Glue the transparent windows 28t and orifices 28d on the inner side of 28. Then carefully form the fuselage skin and after several dry tests glue it to the fuselage frame. Do not be in a hurry. The gluing of the skin is the most critical operation in the entire assembly process and the overall view of the competed model depends of it successful completion.

Continue with the engine cowling – parts 29, 30 and 31. Pay special attention to forming and gluing 31. Then assembly and glue to 28 the fuselage section 32 and main rotor gear cowling 33.

Now assembly the cockpit glazing 34, 36 and glue it to the cockpit. You can fix the door 63 in open or close position.

Then prepare the rear fuselage segment 37 and add it to the fuselage. Add also the tail – parts 38 and horizontal stabilizer 42. Be careful in gluing the stabilizer to tail – do not avoid twisting of it. Keep strictly the lines of symmetry.

Prepare and fix the landing gear to the fuselage. Glue the wheels from concentric card circles 45, 48, then round them by using sand paper and paint the tires in black.

Prepare the tail rotor subassembly as it is shown on view F of the instruction drawings. The rotor must be capable to rotate free. Then glue the subassembly to the tail.

Add all small details – rescue hoist, exhaust pipes, antennas, pilots glass cleaners and mirrors.

Assembly the main rotor as it is shown on view I. It must be capable to rotate free in its bearing, then insert the main rotor subassembly in its place on the main gear cowling 33.

Now your model is ready. Enjoy.

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See the next page forthe interior variants

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You need 1 seat and2 x 4 litters for standardMedevac interior equipment

You need 1 + 3 + 3 + 4 seats packsfor Troop Transport variant

You can omit all the interior equipment forcargo variant.

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