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Old Aug 06, 2015, 05:34 PM
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Help!
Prop size for 3536 900kv motor???

I'm running a 3536 900kv motor w/ 30 amp esc on my pkz wildcat. Would anyone have any suggestions for a prop size for this motor and plane combo without toasting the esc??
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Old Aug 06, 2015, 08:13 PM
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11*8 should draw about 26A on 3s. Verify with a wattmeter!
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Old Aug 06, 2015, 08:30 PM
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Thanks buddy. I put a 40 amp esc I had In it just to make sure. I just got my watt meter In and gotta run to my buddy's an get it. I may try a 11x6 3 blade. I'm not sure how it'll act on a belly lander as far as breaking....
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Old Aug 07, 2015, 01:38 AM
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Personally I wouldn't choose the 11*6*3 over a 11*8 because with the relatively low Kv the pitch speed will be on the low side for the Wildcat. I'd actually also consider a 10x10 and if you stick with the 40A ESC, 11x10
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Old Aug 07, 2015, 05:33 AM
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Sounds good bud. The prop that came with the plane originally was a 11x9 but finding this prop is slim Pickens! I figured the low pitch would prolly spin a lot faster for the kv as well. Your input is appreciated scirocco! Now turn up some rose tattoo!!!!
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Old Aug 07, 2015, 05:40 AM
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Quote:
Originally Posted by Murdock80 View Post
Sounds good bud. The prop that came with the plane originally was a 11x9 but finding this prop is slim Pickens! I figured the low pitch would prolly spin a lot faster for the kv as well. Your input is appreciated scirocco! Now turn up some rose tattoo!!!!
apc has an 11x8.5 you could try. The 11*6*3 is indeed a little less load than 11*8, but only a little and the few extra revs can't make up for 25% less pitch. Unlike glo engines that can unload a lot and rev a lot harder with smaller props, an electric motor's voltage times Kv is effectively a rev limiter. Under load, you'll never see rpm much more than 80% of Kv x battery voltage.
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Old Aug 07, 2015, 05:52 AM
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Cool. I'm still learning the whole kv prop size wattage motor size thing. When I get my watt meter I suppose I will learn a lot more fine tuning to this. I'll pick up one of these props today at my LHS. Again. Thanks buddy
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Old Aug 07, 2015, 05:54 AM
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Where this is a belly lander.. The length of the prop won't be an issue?
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