RC Parachutist (oz6168)


RC Parachutist - plan thumbnail image

About this Plan

R/C Parachutist - Free flight RC model.

Quote: "RCM introduces true-scale precision parachuting - jumping from a powered aircraft, stable and steerable free-fall, plus radio controlled opening of the chute and steerable landing to a designated target.

I first had this idea in the Autumn of 1973 after completing my military service as an airborne infantryman and, since that time, haven't been able to lose my initial enthusiasm for the project. I wanted to carry out true-scale parachute jumps with a small model parachutist. With 'true scale' I mean: exit from a motor-powered R/C aircraft, stable and steerable free-fall; plus radio controlled opening of the chute and steerable landing to a designated target.

Fortunately, the state of the art of raio control technology has progressed so far today that it is possible to place a complete radio system in the body of a 15 inch high 'Pinocchio'. After a great deal of thought, as well as some sleepless nights, I started building the project on Christmas 1973.

The first problem was how to control the chute, itself. With my experience in full-size sport parachuting, this was quite easy to solve. I used a circular canopy parachute with a single steering gore at the rear side which produces the forward drag as well. Control lines are mounted on both sides of this gore and connected to the jumper's hand. The arms of the parachutist are moved vertically by two servos. By pulling one of the control lines, the airflow through the left out gore is conversed and the chute will turn to the side where the control line is pulled. The arms are moving around the shoulder joint only, while the legs are moving around one axle and are not controlled.

The next question was ow to achive stable position during a free-fall with a closed chute. A falling body obtains stability by a sufficient dihedral and a low centre of gravity..."

Supplementary file notes

Article pages, text and pics, thanks to N1EDM.


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