The “Socièté d’Etudes et de Recherches pour la Mechanique, l’Electricité et l’Electronique, SARL” was founded in 1969, and was dedicated to aerospace products.

-In the motoring aspect, together with other groups, it made the following engines. The company was based in Toulouse as a subsidiary of Bonzavia. It started with a small 65 kgf thrust turbojet, the TRS-12.

“Sermel TRS-12”

-It was followed by the TRS-18 (see Microturbo), somewhat larger and more powerful, with 100 Kgf of thrust. These engines can operate with the different available aviation kerosenes.

“Sermel TRS-18”

-The TRS-18 was installed on the Caproni-Vizzola A-21J “Calif” jet motorsailers.

-The Sermel TRS-25 from 1972 remained only a prototype.

-The TMS-60 was a 250 CV turboshaft that had no application and the turboprop version did not appear either.

-The SDS-12 was a compressed air starter for main engines, with power equivalent to 120 CV.