I have a ST 90 on a Sig 4 Star 60. I've been flying it with a 13X7 APC, however, I would like to get a little more pull.
The recommended prop range in the manual only goes as high as a 13X7 so I have been hesitant to try a 14X6. I'm not sure if this will damage the engine.
Any ideas on size would be appreciated and whether or not this will damage the engine.