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Electric Stunt => Gettin all AMP'ed up! => Topic started by: paul winter on January 07, 2013, 12:35:47 PM
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hi all
why do we have to use Apc electric props on electric motors ,why cant we use a normal 11x6 three bladed flat back carbon prop ,the weight difference is minimal an apc is 26 grams and a 11x6 carbon is 27 grams
come on experts tell me why ??????
paul
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Paul,
I don't claim to be a expert but I have done a lot of work with props on both the ECL and IC power. The main reason to use the "E" prop is load. The standard props are two to three times the blade thickness compared to the "E" blade (this is APC or other brands) and the hub is also much thicker. This is done to take the cyclic pounding of the IC engine. The thin "E" props use 30%+ less amps to turn the same rpm on our electric motors. That's a lot of extra battery you would need to haul around and likely would need a larger motor also, all adding more weight. The APC's are very hard to beat even the wood electric props don't match it's performance/amp draw. APC puts a lot of engineering into its props, that why cutting them down usually reduces the performance. This has been my experience, others may see it differently.
Best, DennisT
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Props!!! Now ask Paul Waker He uses a carbon 3 blade Majic prop.
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Larry,
Who makes the Majic props? They don't come up in a goggle search, are they cottage industry? I agree there may be other props that are as good or even better than the APC's but they will be special not off the shelf. For off the shelf the thin APCE props are pretty good compared to any other off the shelf props electric or standard. Don't get me wrong, I'm not saying that other props are not an option just that of the normal available ones the thin APC's perform pretty darn good and have significantly less amp draw then standard props.
Best, DennisT
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Majic makes Majic. Eastern European. Really nice stuff.
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I noticed the other day that Aero Products carries them.
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I presume they are from Tomas Mejzlik, a combat flier from Brno: http://www.mejzlikmodellbau.com/
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Props!!! Now ask Paul Waker He uses a carbon 3 blade Majic prop.
Is that a tractor or pusher prop??
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WOW they are beautiful props and I sure Paul has tried numerous props so they will work. For the local contest flier they might be a bit pricey at $40 but its an option.
Best, DennisT
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Looks like a tractor to me ! n~
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WOW they are beautiful props and I sure Paul has tried numerous props so they will work. For the local contest flier they might be a bit pricey at $40 but its an option.
Best, DennisT
you mean this one? :- )))))
as far as I know they cost 40 EURO, not $ ... but I can say they last forever ... even on rocky bulgarian "grass" :-)))
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Looks to me like you just glued 3 APC 11 x 5,5 e-prop blades together and then painted them with carbon textured paint! VD~
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Looks like a tractor to me ! n~
Thanks Larry. nice pic!
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you mean this one? :- )))))
as far as I know they cost 40 EURO, not $ ... but I can say they last forever ... even on rocky bulgarian "grass" :-)))
Only after you've mastered the talent of always landing on the wheels, with the engine off. I'm sad to say that I'm no there yet.
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Looks to me like you just glued 3 APC 11 x 5,5 e-prop blades together and then painted them with carbon textured paint! VD~
psssst ... it is a secret from my kitchen VD~
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Only after you've mastered the talent of always landing on the wheels, with the engine off. I'm sad to say that I'm no there yet.
3 blade prop is a protector for your canopy and turtle decks from sanding off on concrete LL~
but this is electric column, so if you land unexpected, you have usually flame on instead of flame off, so broken prop is not the only damage in such case ;D