Sea Rider
Supreme Mariner
- Joined
- Sep 20, 2008
- Messages
- 12,345
Rob, thanks for posting wot results...
So going from a 3 blade 14x23 prop to a 4 blade 14x21prop just achieved + 100 wot revs, that's + 50 vot revs per 1 less pitch, So going for the near rule of thumb that states than when passing from a 3 blade pitch prop for a 4 blade while maintaining same diam, will need to go 1 less pitch for engine to achieve same wot rpm as with 3 blade prop.
If so, this "mith rule" proves that in real boating world doesn't works as stated. Will this issue happen in any combo when passing from 3 blade for a 4 blade one ? Comments, other experiences are welcome to have into consideration for the 4 blade prop lovers swapping OEM 3 blade ones.
Happy Boating
So going from a 3 blade 14x23 prop to a 4 blade 14x21prop just achieved + 100 wot revs, that's + 50 vot revs per 1 less pitch, So going for the near rule of thumb that states than when passing from a 3 blade pitch prop for a 4 blade while maintaining same diam, will need to go 1 less pitch for engine to achieve same wot rpm as with 3 blade prop.
If so, this "mith rule" proves that in real boating world doesn't works as stated. Will this issue happen in any combo when passing from 3 blade for a 4 blade one ? Comments, other experiences are welcome to have into consideration for the 4 blade prop lovers swapping OEM 3 blade ones.
Happy Boating