Wicked Good
Recruit
- Joined
- Apr 10, 2008
- Messages
- 2
Right now I'm running a 15x17 3 blade on my Trophy. I have the 3.0 alpha 1 w/gear ratio of 2:1. My max rpm is 4400 to 4800.
With this prop at WOT I hit 4400 @ 31mph.
I want to got to a 4 blade prop for a better hole shot and bite seas when entering my harbor. Soooo...
I have on order, a 15x16 4 blade. I figured the decrease in pitch would raise my RPM 200-300 and going to the 4 blade would decrease it by 100-200 making it close to a wash in the RPM changes and keeping me in the engine manufactures recommended range.
All this figuring comes about by reading A LOT about this topic.
Does my logic hold true and do I have a good chance of getting the desired results or is it always going to be "don't know until you try it" scenario.
With this prop at WOT I hit 4400 @ 31mph.
I want to got to a 4 blade prop for a better hole shot and bite seas when entering my harbor. Soooo...
I have on order, a 15x16 4 blade. I figured the decrease in pitch would raise my RPM 200-300 and going to the 4 blade would decrease it by 100-200 making it close to a wash in the RPM changes and keeping me in the engine manufactures recommended range.
All this figuring comes about by reading A LOT about this topic.
Does my logic hold true and do I have a good chance of getting the desired results or is it always going to be "don't know until you try it" scenario.