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RimFire 65cc motor specs

Old 11-08-2010, 07:20 PM
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wstafford
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Default RimFire 65cc motor specs

Does anyone have the complete specs for the RimFire 65 cc motor? Resistance etc for ElecCalc or MotoCalc.
Thanks,
Wes
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Old 11-09-2010, 01:21 AM
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kyleservicetech
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Originally Posted by wstafford View Post
Does anyone have the complete specs for the RimFire 65 cc motor? Resistance etc for ElecCalc or MotoCalc.
Thanks,
Wes
I'm certain you've found the 160KV, 6500 Watts, 52 Ounces and 9-15 Lipos for this motor.

But, for some reason, Rimfire doesn't like to publish their motors resistance. Perhaps, because their winding resistance is often far higher than the competition? They are rating this motor at 6500 watts, on a 52 ounce motor. IMHO, any motor running over 100 watts per ounce of motor weight is kind of pushing it. One of my models recommends a smaller Rimfire motor, but warns to not touch the motor after a flight because of the risk of burns!

The Hacker A80 series is in the same area, but its twice the price (ouch). I've got a Hacker A60-16M motor, that will turn a 19X12 prop at around 2200 watts, along with Hacker A30's, A40's and A50's. Never been disappointed with them. These motors have a large diameter ball bearing to support the "Bell" end of the rotating magnet structure. You will never have problems with the rotating bell hitting the stator with these motors.

(Don't work for Hacker, just use them!)
http://www.aero-model.com/Hacker-Bru...80-Series.aspx
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Old 11-09-2010, 01:44 AM
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Dr Kiwi
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The suggested figures for Rimfire max. amps, max. watts are notoriously over-optimistic across the board... as you say... they'll fry long before they reach the spec!

I tested a series of smaller Rimfires (supplied to me by GreatPlanes) some time ago... but I never dared run 'em at their inflated figures... my Eagle Tree v3 temperature probe, IR Temp Gun, and "finger calibrated to 60C" told me otherwise.
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Old 11-09-2010, 02:46 AM
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wstafford
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Default RimFire 65cc

Thanks for the info guys. What I'm trying to do is electrify a quarter scale Beaver. Unless there is a major weight reduction/power increase or an exponential increase in battery capacity it's not going to happen. But I've learned a lot by checking. Thanks again.
Wes
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Old 11-09-2010, 03:41 AM
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kyleservicetech
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Originally Posted by wstafford View Post
Thanks for the info guys. What I'm trying to do is electrify a quarter scale Beaver. Unless there is a major weight reduction/power increase or an exponential increase in battery capacity it's not going to happen. But I've learned a lot by checking. Thanks again.
Wes
As you indicate, giant scale electrics get expensive, fast. And, they'll never fly as long as a gasser on one flight. (As for power, Hacker makes an A200 series motor, but it will take about 150 A123 cells to run it! It's rated at around 20 horsepower.)

But, I've found you can actually run those Hacker motors at, or even slightly above their ratings with zero concerns.

This thread will give you an idea on what's involved converting a 70 four stroke sized model to electric:
http://www.wattflyer.com/forums/showthread.php?t=45222<o</o
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