RE: Numbers for ST G21/35 DDD head
Hello All:
The horsepower numbers that I got with the ST G-21/35 with the DDD head produced the following:
12x 6 prop at 8500 rpm= .519 hp.
10x6 prop at 11500 rpm= .619 hp.
As a side note, the OS .40 engines with the DDD head produced .432 hp with the 12x 6 prop at 8,000 rpm.
One frame of reference that I have always used to evaluate engine performance is the Fox .35 Stunt. It seemed to produce about .45-.50 hp.
If I get some nice weather, I may continue my tests of the glow vs. the Diesel with smaller props.
An expert engine builder who made both glow and Diesel engines claimed the a Diesel will produce as much power as a glow engine on 10% fuel. Of course more nitro would increase the glow engine's power to a higher peak.
Be well,
Franchi