Figures
#1
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Figures
I know this has nothing to do as such with diesels but since i use only diesels i might start hear .
I am experimentig with a paw 19 ds3 and it is turming a 11x3 at 9600 and giveing me 2.3 lbs of thrust
when i check on the thrust hp software it says i should get 4lbs of thrust
any body knows why?
laurence
I am experimentig with a paw 19 ds3 and it is turming a 11x3 at 9600 and giveing me 2.3 lbs of thrust
when i check on the thrust hp software it says i should get 4lbs of thrust
any body knows why?
laurence
#2
Senior Member
My Feedback: (14)
RE: Figures
ORIGINAL: Ldalmas
I know this has nothing to do as such with diesels but since i use only diesels i might start hear .
I am experimentig with a paw 19 ds3 and it is turming a 11x3 at 9600 and giveing me 2.3 lbs of thrust
when i check on the thrust hp software it says i should get 4lbs of thrust
any body knows why?
laurence
I know this has nothing to do as such with diesels but since i use only diesels i might start hear .
I am experimentig with a paw 19 ds3 and it is turming a 11x3 at 9600 and giveing me 2.3 lbs of thrust
when i check on the thrust hp software it says i should get 4lbs of thrust
any body knows why?
laurence
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The chart is wrong. The tach is wrong? The scale is wrong? Anyway, it is a good question.
Where do you buy an 11x3 prop? Never heard of one with so little pitch. I guess I learned something new today.
Ed Cregger
#4
Senior Member
My Feedback: (19)
RE: Figures
There are a lot of reasons.
A. Are you at sea level? If you above sea level thrust will be lower at any RPM.
B. Most of those thrust HP softwares for models are far too simple to give a good answer. The calculations are not based on real life test of the props.
C. The method you are using might not work well.
D. All of the reasons Ed gave.
A. Are you at sea level? If you above sea level thrust will be lower at any RPM.
B. Most of those thrust HP softwares for models are far too simple to give a good answer. The calculations are not based on real life test of the props.
C. The method you are using might not work well.
D. All of the reasons Ed gave.