Thompson Contra Motor TCM 3 Test

Thompson Contra Motor TCM 3 test with a 4 cell Li-Po battery. This motor is built using a pair of 4Max PP 4250-600 outrunners, & will be the final upgrade to my Martin Baker MB5.
Peak power on run 1600watts. Peak current 114Amps. Peak RPM 8500.
Propellers 3 bladed 13.9 Ramoser VarioPROP with 12C hubs.

Links:
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Roys RC TV web
http://roys-rc-tv.webs.com/
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Ramoser varioPROP
http://www.ramoser.de/home_e/varioprop_e/varioprop_e.html
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4Max Purple Power Brushless Motors
http://www.4-max.co.uk/
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RC Groups forum, Contra rotating prop brushless
http://www.rcgroups.com/forums/showthread.php?t=246407
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Contra-rotating motor from AEO Technology
http://www.rcgroups.com/forums/showthread.php?t=776634
http://www.aeorc.com/english/index.php?gOo=goods_details.dwt&goodsid=118&...
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Mpi Contra-Rotating Motors
http://www.maxxprod.com/mpi/newdevelopment.html
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Category:

Autos & Vehicles

Tags:

• TCM
• Contar
• Rotating
• Electric
• Motor
• RC
• Plane
• Scale
• radio
• control
• scale
• Martin Baker
• MB5
• Aircraft
• Roy's RC TV
• Basingstoke
• model
• flying
• air
• airplane
• force
• metal
• planes
• aviation
• volts
• amps
• power
• speed

[abarbee98]

...without melting down, expanding and contracting, and so on?



[RTatBstoke]

@abarbee98 There is no gearbox, it a twin outrunner motor. The back motor drive through the centre of the front motor. The front motor rotor sits on the shaft, on bearing. So it can rotate in the opposite direction. Take a look at my other contra motor video, it may be a bit clearer.

[0MoTheG]

I would like to know a bit about the math of this.

is it the same as a single prop with a motor twice as strong? is the torqe halfed?

[RTatBstoke]

Thanks for your interest.

On the fall size yes they were if not a little more efficient, if you take out the extra complexity. There is no torque effect or at least very little with contra's

[RTatBstoke]

Hi

It quite easy the back motor drive through the centre of the front motor. The front motor rotor sits on the shaft, on bearing. So it can rotate in the opposite direction. Take a look at my other contra motor video, it may be a bit clearer.

[abarbee98]

how much RPMs can the gearbox withstand?

[0MoTheG]

I ment the torque of the individual/each motor not the cancelation.

under the assumption that both motors run the same speed with the same prop (one right and one left issue): is the powerconsumption the same as for a single one at the same speed?

[fillopygeesi]

i dont understand how this works. are the motors spinning in opposite dirrections. or some type of gears revers the other prop