Sea Rider
Supreme Mariner
- Joined
- Sep 20, 2008
- Messages
- 12,345
Escenario :
3.80 Mtr Sib
Short shaft, 2 strokes 5 HP, one cylinder 105 CC OB, fully operational.
Tach installed
Fully optimized OB/transom height.
Wot range 4500-5500 rpm
Data :
Total weight is 250 KG, with 1 up and a OEM factory delivered 3 blade 8 pitch cupped prop was running at just "4700" wot revs at fast displacement speed on a flat, non windy rowing court.
Question :
While maintaining same diam, which pitch would OB needs to rev towards 5500 max wot rpm range to plane combo while carrying same weight ?
Happy Boating
3.80 Mtr Sib
Short shaft, 2 strokes 5 HP, one cylinder 105 CC OB, fully operational.
Tach installed
Fully optimized OB/transom height.
Wot range 4500-5500 rpm
Data :
Total weight is 250 KG, with 1 up and a OEM factory delivered 3 blade 8 pitch cupped prop was running at just "4700" wot revs at fast displacement speed on a flat, non windy rowing court.
Question :
While maintaining same diam, which pitch would OB needs to rev towards 5500 max wot rpm range to plane combo while carrying same weight ?
Happy Boating