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Help, need a large, low kV motor.
I've been looking for a pair of large low kV electric motors and am hoping to get some leads on here.
So far my Ideal motor selection would be the Turnigy 80-100-B 130kV motor but I fear they may no longer be available? http://hobbyking.com/hobbyking/store...idProduct=5142 Any thoughts on an alternate option, or where I can find a couple of these? I know the quality isn't superior in this brand so was aiming to get 4 of them to use 2 and keep 2 as spares. Thanks for any input! |
RE: Help, need a large, low kV motor.
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RE: Help, need a large, low kV motor.
They have some 80-50 50cc class motors in stock
http://www.hobbyking.com/hobbyking/s...ner_Motor.html |
RE: Help, need a large, low kV motor.
Yes that's the one. But its unavailable and I read It won't be cming back, hence my post for help. Unless you see something I don't? |
RE: Help, need a large, low kV motor.
The 80-80 are back ordered but they seem to come back in stock in a few weeks. Those XP motors have been back ordered for years.
http://www.hobbyking.com/hobbyking/s..._80cc_Eq_.html |
RE: Help, need a large, low kV motor.
And the really big 100cc jobs are in stock also.
http://www.hobbyking.com/hobbyking/s...ner_Motor.html as wells as the 120-70 http://www.hobbyking.com/hobbyking/s...100cc_eq_.html |
RE: Help, need a large, low kV motor.
Thanks for the input. I really like the idea of the low 130kV motor. I want to turn a 4-blade 24" prop and I know that motor has successfully done it with a low amp draw (under 100A) as a direct drive. Guess my only real option will be to come up with some sort of belt drive reduction system to reduce the speed and keep the torque. The ultimate home for these is in a twin project that will weight around 35-38 lbs I'm guessing.
Keep the ideas/options coming! Thanks! |
RE: Help, need a large, low kV motor.
ORIGINAL: smchale Yes that's the one. But its unavailable and I read It won't be cming back, hence my post for help. Unless you see something I don't? |
RE: Help, need a large, low kV motor.
Thanks for your input on this. I went ahead and ordered a pair of these. Will see how they work out.
http://jgrc.biz/index.php?_a=product&product_id=106 |
RE: Help, need a large, low kV motor.
smchale, you ever find a suitable motor?
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RE: Help, need a large, low kV motor.
I think so. I picked up a pair of these:
http://jgrc.biz/index.php?_a=product&product_id=106 |
RE: Help, need a large, low kV motor.
You test them yet?
What are you going to put those in? With 24" 4-blade props I know it's going to be BIG. :) |
RE: Help, need a large, low kV motor.
Nope not yet, still need the props. It's for a 100" DH Sea Hornet. [8D]
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RE: Help, need a large, low kV motor.
1,474 g 4,422 w 35.3 pounds 140kv x 12S 44.4v = 6,216 rpm 4-blade 21x12 @ 6216 RPM 34.2 Static Thrust 70.6 MPH 4,760 watts 107.2 amps X 2 = 68.4 pound plane 68.4 x 16 = 1094.4 1094.4 ÷ 9.98 = 109.65 109.65(X^Y).6666 = 22.90 22.90 x 144 = 3298 3,298 ²" wing area plane. 47.7 oz. ²' wing loading 34.5 MPH stall speed 86.25 MPH top speed Nice! |
RE: Help, need a large, low kV motor.
I get a 162" wing span with a 20.3" cord with those motors. :)
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RE: Help, need a large, low kV motor.
What do you get with a 24x16 ish prop?
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RE: Help, need a large, low kV motor.
On a 12S " the slowest and larget prop"
6216 rpm 58.4 pst 94.1 MPH 10,830 watts 243.9 amps |
RE: Help, need a large, low kV motor.
24's are just to large for those motors.
Those are huge motors, they will easily make almost 6HP but they can't swing those 24's in direct drive. |
RE: Help, need a large, low kV motor.
An electric prop should be no larger than 1/4 the wing span on a single and I'd guess 1/8 on a twin.
100" should be about 12.5" props. ...and this is for 2-blade props, multi's would be even smaller. |
RE: Help, need a large, low kV motor.
OK a 4-blade 24"x 16 prop at 5,000 rpm will make,
37.8 pst 75.7 mph 5336 watts / 7.6 HP 120.1 amps 149 watts per pound. You need a 140kv motor thats will take a 12S pack and weighs 1778g |
RE: Help, need a large, low kV motor.
ORIGINAL: smchale I've been looking for a pair of large low kV electric motors and am hoping to get some leads on here. So far my Ideal motor selection would be the Turnigy 80-100-B 130kV motor but I fear they may no longer be available? http://hobbyking.com/hobbyking/store...idProduct=5142 Any thoughts on an alternate option, or where I can find a couple of these? I know the quality isn't superior in this brand so was aiming to get 4 of them to use 2 and keep 2 as spares. Thanks for any input! AXI 5360 130 KV http://www.hobby-lobby.com/brushless...33003_prd1.htm |
RE: Help, need a large, low kV motor.
$750 each and he needs two. Ouch!
Then again the flite packs will be $600 each and good for a 5 minute flight then thown away in a sesone or tow. |
RE: Help, need a large, low kV motor.
Plus $1k for props and blades...at some point the accountant steps in. Lol. If the concept proves to work I could always upgrade motors one day.
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RE: Help, need a large, low kV motor.
ORIGINAL: AmishWarlord $750 each and he needs two. Ouch! Then again the flite packs will be $600 each and good for a 5 minute flight then thown away in a sesone or tow. Wow! you pay $300 for a 6 cell pack? Where, at Macy's? Gerry |
RE: Help, need a large, low kV motor.
Well Gerry, price 10,000 mAh at 12s for me.
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