About this Plan
Coriolis. A/1 glider design.
Quote: "Something simple, yet with a contest pedigree is this 45-1/2in A/1 spec glider.
THE ORIGINAL Coriolis was built in July 1961. It flew well but lacked competition performance, averaging only around 110 secs., and tended to be unstable in winds over 5 knots. The next version had a slightly shorter moment arm, and a new wing and tailplane planform was tried. This greatly improved the stability, but the duration eras not appreciably changed. The aim was a duration of 130 secs under 'no lift' conditions.
This was finally achieved at the beginning of 1962 by changing the wing section to MVA 30135 and the tailplane to a reduced Clark Y. Flat air durations of 120-150 secs were commonplace and 130 secs average duration over 125 flights satisfactory. With the slightest lift about, Coriolis is set for a maximum.
The model won practically every contest entered, including several club contests, a RAF Model Aircraft Association Postal Contest and on two occasions, the Murray-Crump Memorial Trophy awarded to the winner of the A1 Glider contest at the RAF Model Aircraft Association Annual Meeting, As for its aesthetic appeal, it took a 3rd place in the RAFMAA Concours D'Elegance, after having flown over 150 times!
Simple structure: Construction is straightforward but keep the weight to an absolute minimum. Building an A1 strong and yet as near 5.05 oz as possible is essential. 5-1/2 oz is the heaviest of the models built so far and it is considered that 6 oz is the absolute maximum if Coriolis is intended for competition work.
Cut the main nose section spine from 1/16 ply, then shape 2 oz of plumbers solder to fit in the cut-out section. Cut two sides from in. sheet medium balsa and 'sandwich' ply and lead, cementing liberally. Carefully cut the tongue at rear end to take 3/32 sides..."
Coriolis, Aeromodeller, January 1964.
Direct submission to Outerzone.
Supplementary file notes
Article pages thanks to RFJ.
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