Orion model LL-50 50hp engine on the Letov S-39. Pending to provide more information.

From Appendix 6: The LL50 is mentioned in the main text. Now we have located an Orion model LL30 at the Technical Museum in Prague.

“Orion LL30”

-This motor is installed on a Henri-Mignet HM-14 (Flea or Pou-du-ciel as written in English or French) from 1937.

-The power was 31.6 kW and the engine was designed by Vilem Michl, de Slany in 1929.

-Photo courtesy of AEHS.