P.1174 - Radio control sport power model. Delta pusher design for Cox 0.8cc Babe Bee and single channel RC.
Quote: - "A simple to build canard delta pusher model for single channel radio control. Designed by J. Crampton. THE P.1174 is a R/C model, based on the general configuration of the North American B-70. Its length is 3ft 6in and the wing span (at the trailing edge) 22in. The sweep of the Ogee plan form wing is 68 deg. The weight of the model, complete with radio three 1 volt pencell batteries and Cox 0.8cc engine, is 15 oz. The twin rudders are coupled together and operated by a Citizenship rubber powered sequence actuator and the radio gear is RCS. The model is trimmed with the differential incidence shown on the plan to fly in a gentle turn to the right, so that quick pulses produce a left turn. After a hand launch the model is made to climb in a series of S turns into wind and, when at about 200 ft it can be left to orbit in a climbing right-hand turn as it drifts back overhead. When the motor cuts it assumes a fairly steep gliding angle and loses height rather quickly - still turning to the right. Quick pulses on the transmitter just before landing straightens - and levels - out the flight path and the model touches down smoothly. This is a very satisfying design for several reasons: 1. It is simple to make - no ribs, spars or longerons. The fuselage box is made up from 1/8in thick balsa and the wings, fins, rudders and foreplanes from 3/32in balsa sheet. 2. Rudder effectiveness is the same with power on or off. 3. The model is remarkably stable especially in roll. 4. When rudder is applied the resulting yaw instantly applies bank in the required direction. When the rudder is straightened the model assumes its trimmed attitude at once. 5. The model is very strong and can take terrible punishment. 6. With a 'pusher' prop the model stays perfectly clean no oil anywhere..."
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