One of the last big piston engine helicopters. The turbopropellers arrived and cut short his career. But he has a funny face with two star motors in external nacelles
It is now available in my hangar : http://helijah.free.fr/flightgear/les-appareils/ch37b/appareil.htm
Regards Emmanuel
And on FGAddon (Trunk) : http://mirrors.ibiblio.org/flightgear/ftp/Aircraft-trunk/