Initials of Moteurs Guy Negre, an important figure in the French motor world, especially in sports cars. In 1987 he took over SACMA (see) and its aviation engines.

-However, it is not known that he continued developing them. Sacma was active only from 1978 to 1981.

From Appendix 6: (see SACMA). Two partners, Paul Deville and Guy Negre have designed a new rotary engine for aviation.

-Both partners have been developing racing car engines, together with major brands in the sector. The new W12 car engine was inspired by Volkswagen, Bugatti and a few more.

-It was inspired by a W16 congener of a mutual friend, named Jiménez from 1993 and for the same use.

“The MGN and the Jimenez”

-The team that does the above wonders has also made a new engine, but this time for aviation.

-It is a four-piston rotary engine with reduction gear that we show below.

"MGN Rotary Engine"