Engine Run - OS Max 15CV-M

A marine engine rescued from the briny blue and refitted for a bit of Slow Goodyear racing in New Zealand. Water cooled head cap removed, throttle replaced with a 4.0mm venturi and spraybar/retainer, needle valve rebuilt as a remote needle, custom made spinner nut. No internal changes. Fuel is 10% nitro, 20% oil.
The CV-M is a much more aggressively timed engine than its airborne cousin the CV-A, so it performs significantly better on the smaller props. One the biggest prop it's the same RPM as my ASP S15A - a Chinese clone of the CV-A. On the smaller props it has a clear 1000RPM advantage, even though the ASP has a 5.0mm venturi.
It should perform very well in Slow Goodyear!

[@ramachandrapai4654]

Where this engine is used. Now battery operated miniature motors used in drones, hope fuel based miniature engines are obsolete now.

[@ashcustomworks]

Pretty close to obsolete for its original use, but still suitable for model aircraft racing where power to weight ratio is important or impact survival, or where rules specify this type of motor. Control Line Goodyear racing or combat, for example.

[@rcrotorfreak]

@@ashcustomworks Long ago this was used in duct fan jets :)

[@miguelperaza6615]

Super gorgeous engine, I'm crying real hard NOW because I'll NEVER have one 🥺😢😭 like it 😢