Vietnamese engineer Bui-Hien adapts fortune engines -in a post-war country- to install them in his homemade helicopters.

"Vertical engine on one of his machines"

"From the other side"

-It seems to be a Mercury outboard engine that gave 106 hp at 12,000 rpm, lowered to 70/80 hp -according to our information-. Observe the temporary terrace chair.

"Helicopter with double rotor and without tail rotor"

"Flight test in hangar"

"Car engine for another machine"

"Another invention of Bui - Hien"

-Supposedly with the engine shown above.