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RCPRO Electric Warbird Racing

Old 06-22-2009, 06:45 AM
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Default RCPRO Electric Warbird Racing

A few years ago I proposed a racing class based on the P-51 Mustang EP airframe by The World Models. At the time, the airframe used a brushed and geared Speed 400 motor and there was a new version of it, the Voodoo, that used a brushless outrunner. TWM planned to obsolete the geared Speed 400, but it was going to take some time. Fai at AirBorne and I had conversations about increasing the number of models in the same size using the same motor. Now there are 6 different airframes that are approximately the same size and all use the same brushless outrunner motor.

Since power systems have been the big wildcard in electric racing, having a single motor provides the opportunity for leveling the playing field. TWM is going to be producing the KM0283010 outrunner motor for a long time as they are using it in almost all of their "park flyer" electric planes. And they are committed to keeping it constant.

So I have re-specified the racing class. It is now called RCPRO Electric Warbird Racing and the URL is [link=http://www.ElectricWarbirdRacing.com]ElectricWarbirdRacing.com[/link].

Several years ago batteries for these planes were $65 to $75 each. These days you can get the [link=http://www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=6306&Product_Name=ZIPPY_ Flightmax_2200mAh_3S1P_20C]ZIPPY Flightmax 2200mAh 3S1P 20C[/link] for $16.99 and the [link=http://www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=7363]Rhino 2150mAh 3S1P 20C Lipoly Pack[/link] for $21.95. So for around $100, you can get a race's worth of batteries. This is a BIG change.

I converted one of the geared P-51's to use the KM0283010 outrunner motor and I also put a Voodoo together. I tried various props, but I liked the APC 9x6E prop the best. The speed is in the 60-70 mph range. Not real fast, but fast enough for the size of plane and managable for intermediate pilots. These planes are a little more demanding than Club 40 planes.

Here's a picture of my plane. I had an extra Voodoo canopy and yesterday I painted it yellow. I put it on this morning. Also attached is a picture of the Spitfire.

I'm going to demo these planes are the races a Lowe's Motor Speedway. I'm going to add the class to the events and if anybody shows up with planes, we will race them. I will have several, so there will be at least some good demos. I will have motors and ARF kits for sale.

I'm also going to spec a Quickie 200 class using the KM0283010 outrunner motor for guys that want to build their own planes. With a common motor, just like the common engine we have in 424, racing will be more about pilot skill than technology.
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Old 06-22-2009, 06:49 AM
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Default RE: RCPRO Electric Warbird Racing

Here are the airframes. You can go to the links to them at [link=http://www.rcpro.org/html/rules/electric_warbird/rules.htm]RCPRO Electric Warbird Racing - Rules[/link]
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Old 06-28-2009, 03:11 PM
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Default RE: RCPRO Electric Warbird Racing

I burned up an ESC on my yellow P-51 yesterday. I had the throttle up while I was attaching the battery and apparently the ESC did not prevent the prop from trying to spin. The ESC smoked. I switched out the ESC today. I had been getting 175 watts at WOT. Now I'm only getting 160 or so and it goes down to about 140 for sustained duration. Since the motor is rated at 225, I'm no where near the limit. I don't know if the battery was damaged or not.

But one thing is now clear to me. I will be making a test stand for the KM0283010 outrunner motor so I can test props and batteries in a controlled manner just like I do glow engines.

So there will be room for people to optimize their power systems, even though they are limited to a single motor.
Old 06-30-2009, 02:16 PM
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Default RE: RCPRO Electric Warbird Racing

Dave Glasscock brought his P-51 over for me to convert the motor to the www.ElectricWarbirdRacing.com legal motor.

Dave's mother won the plane in a raffle at a race at Lowe's Motor Speedway last summer. She worked in the legal system and Dave's plane is called "The Scales of Justice"
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Old 08-01-2009, 12:27 PM
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Default RE: RCPRO Electric Warbird Racing

One of the guys who has been a big help at the Summer Pylon Series at Lowe's Motor Speedway got the [link=http://www.airborne-models.com/html/productdetails.asp?ProductID=139]P-47D Thunderbolt EP[/link] from me at the first race. Matthew Rudolph has assembled it, but has not flown it yet. He came by and got some APC electric props to replace the folding prop. This is one sharp looking plane.
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Old 08-09-2009, 10:41 AM
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Default RE: RCPRO Electric Warbird Racing

Here is how she looks now..
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Old 12-31-2009, 06:25 AM
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Default RE: RCPRO Electric Warbird Racing

great idea Don!

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