Taking advantage of 72, big prop?
 

Got a saito 72 and man is that a sweet engine. I want to really take advantage of that torq, thinking of a apc 14x4. I know the 14x4xw (wide) a fun fly prop is sweet, but expensive. Was thinking of just the 14x4. Will it spool up ok? pretty fast? This would be a great engine for that size prop it seems, espesaly with the shallow pitch. seems like it would turn it good.

RE: Taking advantage of 72, big prop?
 

It may not load it up enough. 13x4W works good if you are not going to run 30%, if you are then go for the 14x4W.
Ed M.

RE: Taking advantage of 72, big prop?
 

I used the 14x4W on only 10% and it was fine, got about 9500 out of it, maybe a shade more. HUGE amount of thrust, and the downline breaking was imense.

With the 13x4w you will be going way over 10000 rpm, so not meeting your requirement of big prop on high torque.