mmattockx

Supertigres are Italian engines. They need one blade every 5 CC (0.30 of a cubic inch) displacement you know. That’s a rule “As old as the way to Rome!” ( Did I read that somewhere before?) we all know in Europe.
In the past I always did use a one blade prop on the 30 , two blade on the 60, so you use a three blade on these 90's
So you can keep the pitch value low, of example 12 x 6 without making a lawn mower. (Kwik Mow Mark III) and reduce the speed and noise.


Cees