 The engines were replaced by inert mass balances.This aircraft flew 83 test flights, and is preserved at Le Bourget.The larger Leduc 0.21 flew from an air launch on 16 May 1953, and the swept wing supersonic Leduc 0.22 interceptor began testing on 26 December 1956 with a SNECMA Atar turbojet before the program was terminated in 1958.