Help me choose Prop please..
10-08-2003, 04:22 AM
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Help me choose Prop please..
Hi all,
Using Crazy Sparow Stryro Kit, 8 cell 500AR batt pack, Speed300 and gear 4.5:1 - which Prop?
also..
Crazy Sparow Stryro Kit, 8 cell 500AR batt pack, Speed3280 and gear 4:1 - which Prop?
Would really appreciate suggestions
PS: Burned out 2 Speed 280 w/ above setup using 9x6 Prop!?
Using Crazy Sparow Stryro Kit, 8 cell 500AR batt pack, Speed300 and gear 4.5:1 - which Prop?
also..
Crazy Sparow Stryro Kit, 8 cell 500AR batt pack, Speed3280 and gear 4:1 - which Prop?
Would really appreciate suggestions
PS: Burned out 2 Speed 280 w/ above setup using 9x6 Prop!?
10-12-2003, 08:41 AM
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RE: Help me choose Prop please..
Hi downwind3zero,
Again - use this FIRST!
http://brantuas.com/ezcalc/dma.asp
That would have told you a 9x6 was a no, no!
Cheers, Phil
I trust my renegade and less than patriotic countrymen (Brad Butterworth et al.) are happy in Switzerland with the Americas Cup - tell them to keep it polished until real Kiwis come and take it back in a couple of years time!
Again - use this FIRST!
http://brantuas.com/ezcalc/dma.asp
That would have told you a 9x6 was a no, no!
Cheers, Phil
I trust my renegade and less than patriotic countrymen (Brad Butterworth et al.) are happy in Switzerland with the Americas Cup - tell them to keep it polished until real Kiwis come and take it back in a couple of years time!
10-13-2003, 07:29 AM
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RE: Help me choose Prop please..
Well, technically P-Calc wouldn't "tell" you that it was a no-no. There won't be any sirens wailing or red flashing lights. The only way you'd know it was a no-no is if you knew how much current the motors could take.
8 cells, Speed 280, 4:1 gearbox, 9x6 MA prop is only 2.59 Amps... Is that too much for a Speed 280? Someone who doesn't know that motors have limits wouldn't know. The 280s are burning out because the 8 cells are making them spin too fast.
8 cells, Speed 300, 4:1 gearbox, 9x6 MA prop is 13.67 Amps... Is that too much for a Speed 300? Sounds great to someone with no knowledge of electric motors. Too bad it's a meltdown waiting to happen.
8 cells, Speed 280, 4:1 gearbox, 9x6 MA prop is only 2.59 Amps... Is that too much for a Speed 280? Someone who doesn't know that motors have limits wouldn't know. The 280s are burning out because the 8 cells are making them spin too fast.
8 cells, Speed 300, 4:1 gearbox, 9x6 MA prop is 13.67 Amps... Is that too much for a Speed 300? Sounds great to someone with no knowledge of electric motors. Too bad it's a meltdown waiting to happen.
