The Chasle YC-12 Tourbillon ("Whirlwind") was a single-seat light sporting aircraft developed in France in the mid-1960s and marketed for homebuilding via plans. It was a low-wing cantilever monoplane of conventional configuration. As designed, it featured fixed tailwheel undercarriage, but it could also be fitted with fixed tricycle gear.
The Tourbillon flew for the first time on 9 October 1965. Though fifteen sets of plans were sold, only two other Tourbillons were built, both in the UK. The prototype remains on the French Civil register but the two UK aircraft are now deregistered. Their engine types are not recorded in the registration documents.
Variants YC-12 prototype with Continental A65 engine YC-121 similar to prototype with enlarged tailfin for limited certification YC-122 similar to YC-121 but with Continental C90 engine YC-123 similar to YC-121 but with Potez 4E-20b engine
Specifications (typical YC-121)
References G-BGHX; G-AYBV
Further reading