Push Moth (oz3731)

About this Plan

Push Moth. Sport model. A single channel RC pusher design for 0.5 - 1cc power.

Quote: "For anyone who fancies a change from the conventional single channel rudder only model - this could be your answer. This pert little pusher looks different and includes an unusual form of escapement linkage but for all that is simple to build. The aileron control makes for a smoother style of flying and, once you become used to this type of flying, is a pleasant change from rudder. There is no reason why 'kick-up' elevator should not be incorporated, providing the torque rod connection is on the bottom of the escapement, although the original was fitted with a sequential type. Remember that if elevators are used they should be in addition to the designed tail plane area.

'Push Moth' resulted from a long considered desire to design a model with a simple and functional aileron control from a standard rubber driven escapement. At the same time I had been sketching some ideas of a small pusher and it was soon obvious that the two thoughts of aircraft and form of control were going to marry together in an easy and efficient manner. The original fuselage had a shorter nose than the present design and, although ample for storing the R/C equipment, the balancing of the model at the correct point was only achieved by adding plasticine in front of the nose. With the present model, using a 225 Deac pack as far into the nose as possible, a small amount of lead weight was still required to obtain the correct balance point. Possibly this additional weight could be avoided by increasing the sweep back on the wing. I'm sure there's room for experiment in many ways with this form of design. Puish Moth is no lightweight and tips the scales at just over 15 oz. but try to keep the weight down where possible otherwise flying is going to be a little too fast and furious.

You should find ample room for all modern small radio gear in the deep fuselage and should you prefer it, a small motorised servo could be used for either aileron or rudder control. With the Cox Golden Bee mounted 'up back' turning a Keil Kraft three bladed prop in a clockwise direction the power is just about right for normal sports flying. Any glo or diesel engines from 0.5 to 1.0 cc. (or even 1.5 cc. with inefficient silencer!) should cope according to the style of flying required, but any engine which will run in the opposite direction to normal has the advantage of allowing the use of a standard propeller and in this design it is essential to have a 3 blade to reduce the diameter..."

Update 04/03/2016: Article pages, text and pics thanks to RFJ.

Supplementary file notes

Article pages, text and pics.

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