RE: Numbers for ST G21/35 DDD head
G'Day Gazimoto et. al.:
I lost a long reply so I will post a short reply.
The Diesel will not produce more power that the Glow engine. If this were true, I would have flown combat Goodyear, Rat etc. with a Diesel! It has been suggested that I should be using a 9X6 prop on a ST G21/35. The same person suggested that I should use a 13X4, 12X5 or an 11X6 on an O.S. .40 converted to Diesel. Which do you think would have more speed or power?.
Back in the day, I used a ST G 20/15 Diesel in Goodyear just for fun. The winner used a ST G 15 Glow! Both engines were stock! He was much faster than I! So much for using a Diesel in Goodyear! Lol
Let's see. Diesel fuel $60.00 per gallon vs. Glow at $15.00 per gallon! No brainer for me!
In any case, use what makes you happy but do not confuse facts with fiction!
Stay well,
Franchi