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.

Though fifteen sets of plans were sold, only two other Tourbillons were built,[1] both in the UK.

[2] The prototype remains on the French Civil register[3] but the two UK aircraft are now deregistered.

Their engine types are not recorded in the registration documents.

Data from Jane's all the world's aircraft, 1975-76[4]General characteristics Performance