Originally Posted by SuperNash

Out from the furthest reaches of the engine drawer...

OS Max H 40 RC. Dykes ringed, dual BB, quite the chap in its day. Air bleed carb though, twin needles came a few years later.

Silencer used was a universal 40 sized dustbin job. It was very quiet, and I suspect a little restrictive.

5% nitro
Plug of unknown age and origin, all I know is it had an idle bar.
11x6 APC
9700 rpm.

Easy starting. Not bad throttling considering the simplicity of the carb (complete with wobbly needle valve). Although probably equalled in power by a modern 32, it tips the scales at much the same weight as a modern 32. Fuel consumption was good, too, a 5 minute run had barely used 2oz.

I might try another run with different plug and a lighter prop.