Propellor Pitch to Speed Calculator
Scott created the topic: Propellor Pitch to Speed Calculator
This gives you an approximate idea of what speeds a given prop might push your boat.
( Boat types and prop styles that are Mismatched will never work right however )
** You MUST know Props Pitch & Engine RPM to use Calculator **
Link:
www.go-fast.com/Prop_Slip_Calculator.htm
Using Calculator:
Enter ratio as: 1 for direct drive models.
Enter Pitch in "INCHS" ... Decimal point included ... as is: 4.4 or whatever ?
Enter RPM, "All numbers" ... as in: 16000 or whatever ?
Hit calculate above Theoretical Speed
*** Your 100% efficiency speed will post.
NEXT :-\ Get real and give it some slippage :'(
Average slippage falls between 15 to 25% ... use @ 20% as a realistic baseline.
Enter 20 in slippage box (NO % sign), then hit Actual Speed button.
Next posts a realistic @ speed you might get if boat & prop are matched and working together :
( Boat types and prop styles that are Mismatched will never work right however )
** You MUST know Props Pitch & Engine RPM to use Calculator **
Link:
www.go-fast.com/Prop_Slip_Calculator.htm
Using Calculator:
Enter ratio as: 1 for direct drive models.
Enter Pitch in "INCHS" ... Decimal point included ... as is: 4.4 or whatever ?
Enter RPM, "All numbers" ... as in: 16000 or whatever ?
Hit calculate above Theoretical Speed
*** Your 100% efficiency speed will post.
NEXT :-\ Get real and give it some slippage :'(
Average slippage falls between 15 to 25% ... use @ 20% as a realistic baseline.
Enter 20 in slippage box (NO % sign), then hit Actual Speed button.
Next posts a realistic @ speed you might get if boat & prop are matched and working together :
2 stroke Engine Tech of 30+ years, Prop tweeker, Chronic tinkerholic, Home of Motor Heads RC Racing Engines ...
8 time NAMBA National 6 lap heat racing record holder.
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