Gremlin (oz13922)


Gremlin (oz13922) by G Cole 1945 - plan thumbnail

About this Plan

Gremlin. Indoor rubber sport model. Pod and boom layout.

Quote: "The Gremlin, by GE Cole. A High Performance Beginner's Indoor Model.

Fuselage: This is basically a simple box type structure, containing the motor, with mounts attached to support the various surfaces. This box is constructed first, and the boom (a circular piece of bamboo tapering from 3/32 to 1/16 in diameter) plugged into the small balsa block.

The wing mount is cemented to the top of the fuselage, and when in place, 1/16 sheet braces are fixed between the compression members adjacent to the tongue of the mount, and cemented where they touch it.

Tail Assembly: The tailplane is constructed in two halves to the same outline as the fin, and then joined together. This is then cemented to the top of the boom, and the fin underneath. Note particularly the negative angle of incidence of the tailplane.

Undercarriage: The legs are of 1/16 diameter bamboo, tapering slightly to where the wire axles are lightly bound and cemented on. Complete the wheel with celluloid bearing disc, and cover it completely with superfine tissue. Build the U/C fixture, and after drilling the sockets for the legs, cement it into the fuselage.

Airscrew: The blank is cut from 1/32 sheet as shown, and twisted in steam until the blade angles at the widest chord conform with those on the drawing. It should then be given several coat., of banana oil, sanding between each coat, and finally pinned down to dry, still twisted as on the diagram. The hub is built up of two pieces of 3/32 sheet cemented each side of the prop centre, the shaft being passed through the middle and bent back into the airscrew.

Covering: The drawing for the wing is self explanatory, and when completed, it should be covered on the top surface with super fine tissue. This single surface covering also applies to the tail surfaces, and is not sprayed. The fuselage is covered in the ordinary way, and sprayed once with water.

Complete the assembly by cementing the wing into position, and plugging in the U/C legs. The power is provided by two strands of 1/2 in flat, 9 in long, this giving a maximum of 700 turns.

The model should balance fairly well if the plan has been strictly adhered to, and any adjustment needed may be provided by bending the tail boom slightly up or down. Trimming should be carried out along the usual lines for a machine of this class."

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