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Old May 07, 2006, 02:23 PM
that tree ate my plane
rotccapt's Avatar
oklahoma city oklahoma
Joined Apr 2004
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replacement motor for power fan

i am building a 23" span mirage that i am planing on using the wattage power fan to power it with i think that i will end up with around a 12-15 oz plane and would like to know wat is a good brushless motor for the fan?
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Old May 07, 2006, 03:35 PM
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Just about any Speed 400 size brushless with around a 3000 kv rating, like the Mega 16/15/3, HET 3W, HiMax 2815-3000.

Rob
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Old May 07, 2006, 07:47 PM
Big gov never Works
St. Martin's Avatar
Skunk Water, Rhode Island
Joined Jul 2002
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I agree with Rob. I'm using the 16/15/3, but with the cut KY rotor, in my Wattage MiG-15. I'm using a C.C. Phx 25 at full advance timing. I'm getting 200W HOC, on a 3s PQ 2200 3s. THe biggest performance increase was from switching from the 10-1050Kans. The lowered AUW has made it a rocket. It fly's now at 18oz.

Steve
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Old May 07, 2006, 09:08 PM
EDF rules... :)
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The 6volt Speed 400 is the exact replacement of the stock motor and like the others have stated there are plenty of replacement BL setups that will drive it.

Eric B.
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Old May 08, 2006, 11:19 AM
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USA, CA, San Francisco
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IMO, the best low-cost option for the WPF is the E-Flite Park 400-4200 (clone of the Himax 2025-4200). You will need a 25A speed control and 3s lipo capable of 25A continuous discharge (TP2100 or similar) and a heatsink to suit the motor (Himax have a nice one).

Don't forget to put some thermal grease between the motor and heatsink.

Getting down to 15oz flying weight with a WPF setup is pretty hard; the fan + motor is ~3oz and even the TP2100 is another 5oz or so. If you go with the Mega 3t, your current draw is down around 16A or so and you could consider 3s TP1320 and a bit of throttle management. Sadly most of the weight you shed from the battery just moves to the motor there...

= Mike
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Old May 08, 2006, 11:35 AM
Don't look at me like that....
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United States, AR, McDougal
Joined Aug 2005
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I have the Park 400 in a wpf with TP 1320 and 20 a e-flight esc and works great, but just a small diff. over the stock motor.



Tom
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Old May 08, 2006, 04:25 PM
that tree ate my plane
rotccapt's Avatar
oklahoma city oklahoma
Joined Apr 2004
1,647 Posts
thanks for the info i will have to look at those i orderd the fan and should have it soon. i may try the stock fan and then upgrade later. i AUW is aproximat because i do not the the equipment nessasary to weigh it but should be under 20oz i hope
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Old May 08, 2006, 05:03 PM
Big gov never Works
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Skunk Water, Rhode Island
Joined Jul 2002
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The stock fan was designed to use a 10 cell NiMh pack of 1100 Mah. This would correlate to a 3s pack. IIRC, the stock fan drew about 14A on the 10 cell. Keep in consideration, the location of the fan and battery. For CG reasons. It's always a degrade to add ballast, on small planes, if you can just shift available components.

Remove the stock mtr and break it in. I used a C sized drycell for power. No rotor attached. Run it till the batt is dead. Then clean the mtr and oil the bearings. This will give optimum performace and longevity.

Steve
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