pitch, rpm, diameter

Hello;



Any empiric or exact datas how impact rpm, diameter and pitch of propeller on hole shot.



Example with two propellers with same caracteristics, but diferent input:

a.) shaft rpm = 3.700 min-1
prop diameter = 15,25"
pitch = 21"

b.) shaft rpm = 3.300 min-1
prop diameter = 15,25"
pitch = 26"

Will be same resultat at hole shot by both situations or?
If will be the same situation and we want to keep pitch, prop caracteristics and rpm what to change:
- prop diameter
- tighten prop blades at tips


Which prop type with same diameter and pitch it is less hard for engine at hole shot:
- choper style
- clever style
- semy clever style
- Hydromotive 5P
- Hydromotive 5PX
- Bravo 1
- Maximus lab and diameter 15,25"




bye
Saso

 

I am not sure what you mean by "hole shot", but the one with the lower pitch will have more thrust(more power and less speed) at the same rpm than the same style prop with the higher pitch.

 

Holoe shot= come out to plane.


bye
Saso

 

The lower pitch will give you the power to get on plane sooner but will have a lower top speed.