Fast electric prop calculator???

[skidooguymxz550]

how acurate is this tool? i know it exxagerates the speeds but by how much

i tested my setup on it a fieago xl14 on twenty cells at 80% eficiency at 22000rpms and 25% prop slip and the speed that it came out with was in the high 70's with a 48mm prop and the mid 80's with 51mm prop.

these speeds seem way to high, are they?



btw i'm running it in a 31" challenger. how big do you think i can go for props?

[Eyekandyboats]

i find it under does everything but the amps.
the amps are a little more then what you pull and the speeds are a little less than real life

[NorthernBoater]

I think you enter something in wrong. I entered in what what you said and it gives me mid 40s to mid 50s. What did you enter in for the pitch.

[skidooguymxz550]

i entered 2.60 on the 48mm and 2.81 on the 51mm prop

[NorthernBoater]

That seams like a high pitch. What props have that pitch for that diameter.

[ReddyWatts]

Remember that the Fiegao motors are 800 watt. I have run them at 1400 watts, water cooled. If you take your voltage of 24 volts and multiply it by 60 amps that is 1440 watts, probably the max I would use in this setup because of heat. Heat also depends on your run time. The 14 XL is a 47 max amp motor. I would start with a X640, then a X642 prop etc. (check your amps.) Raise the strut if it is on a cat.