MODEL AEROPLANE NOTES.

Dominion, Volume 29, Issue 202, 23 May 1936, Page 24

MODEL AEROPLANE NOTES.

BY

’AILERON'

The model for these notes is a lowwing monoplane of straightforward construction. Alost of the details have been described before, so I need not go ovet them very fully. Draw the plans full size. The material sizes are as follow/ Fuselage longerons, crosspieces, crosspieces in tail, 3-32 in. sq.; wing leading edge, l-Bin. sq.; wing spar, 3-32 in. by l-Bin.; wing trailing edge. l-16in. by Jin.; leading and trailing edges of tail unit, 3-32 in. by l-Bin., all hard balsa. Wing ribs, l-16in., flat hard balsa; undercarriage struts,

3-32 in. by 3-10 in.. bard bamboo. All wire used is 21 gauge. Wing, tail and rudder tips of round bamboo, about l-16in. sq. (bent over a candle flame). The tailplane and rudder are straightforward. Be sure they are glued to the fuselage so that the leading edge is a little lower than the trailing edge. The wing has a dihedral angle of 2in, This starts outside the centre section A—A, as seen in sketch S (which also shows the shape of the nose former, of 3-04 in. 3-ply). The leading edge has to be cut away at the centre section to allow the fuselage to sit down on to the wing spar. Pack

down the trailing edge so that the wing has a slight positive angle to tlie line of rubber. A rubber band holds the wing in place; slide it along t<» balance the model. A heavy bamboo spar runs across the centre section, as shown, to strengthen the wing. The fuselage has a triangular top. slake the formers out of l-16in. balsa. The nose-block and prop, are as usual. The prop, is cut from a block Ilin, by IJin. by Jin. (or else use a Scotsman block Gin. by IJin. by Sin.). Cover the leading edge with tissue; balance. The

power is 8 to It) strands of l-Biu. flat rubber. Lubricate well, aud stretch when winding the first 300 turns. About 500 turns may be given to the 8-strand motor. The undercarriage is fitted by cementing the struts into slots in a stout balsa block in the fuselage, as shown. The wheels may be of any type, IJin. diameter. The tail wheel may be fitted if you feel like it ; the detail makes it clear.

Cover the model with tissue; dope one coat of weak dope (including prop.). The model is a good stable flyer when properly adjusted. Finally, if you have any difficulties, write to me.