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HomeAircraftHelicopterMain Discussion › motor watts and efficiency?
03-18-2015 01:48 PM  3 years agoPost 1
emederos

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Miami, Fl Dade

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Im in search of a new motor currently uaing the 500L align motor and it seems to be almost hot to the touch after 8 min scale flying. I was looking into the 500x upgrade but i see it puts out double the power and amps. Will this help with heat or be more efficient as far as temps are concerned?

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03-18-2015 02:10 PM  3 years agoPost 2
Trexwilly

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FL USA

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The 500MX is a pretty good motor! I was flying 3D, and it didn't get crazy hot, warm for sure but not hot!

I did have to rebuild it, but after that it ran very well till I sold the heli!

Watch at YouTube

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03-18-2015 09:34 PM  3 years agoPost 3
ICUR1-2

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Ottawa, Ontario

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try using a smaller pinion instead of a new motor

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03-18-2015 09:49 PM  3 years agoPost 4
Fauropitotto

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Tampa, FL

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If I were you, I would change my ESC settings before trying to replace the motor.

Reducing the motor timing will drop temperatures.

Couple that with a pinion swap, and you should be in good shape.

If you're doing scale flying, there's a good chance that you won't need a very high headspeed. So going down a tooth could help by reducing the motor RPM to match your targeted headspeed.

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03-18-2015 09:50 PM  3 years agoPost 5
gabeoravitz

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San Diego, CA

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Also you could try turning down the timing in your ESC.

Edit: sorry, just saw this was included in the post before me.

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03-18-2015 09:54 PM  3 years agoPost 6
Fauropitotto

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Tampa, FL

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Also, if my understanding is correct, with a lower headspeed and scale flying, KV would be the more important motor spec than power output, especially since you're not changing your battery.

Ex: 1600kV motor vs a 1100kV motor. You figure out your target head speed, then figure out what pinion you need to get the most out of the motor. If it turns out that the headspeed is out of the range you feel comfortable with, then swap out with a different motor with the kV that would put you back in range.

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03-18-2015 09:59 PM  3 years agoPost 7
icanfly

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ontario

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it's true, lower pinion but also raise the throttle to almost 100% if your not in governor mode with lower rpm from the esc. Lower the pwm in the esc and raise the timing after you drop the pinion. If it is still hot lower the timing (means more torque and less hp). You have a constant load from the scale body so you have to optimize rpm with motor torque, any rpm over 2k is a waste and maintaining that rpm with a 500 tuned for high head speed is wrong. Also go get a pair of semi symmetrical foil blades, you'll enjoy the difference in lift and flight time, and the motor will not be working as hard to turn them.

2c's

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03-18-2015 10:52 PM  3 years agoPost 8
Trexwilly

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FL USA

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The 500L was a POS when they released it. it's a 1600KV, but it's an enclosed outrunner... Even in the slipstream, breathing well, it got hot. The 500MX is more powerful, but is also 1600KV, so remember, just because it is more powerful, does not mean it's going to use more power. It should be more efficient and that is what you want!

All the advise is sound, get a smaller pinion, and tweek the ESC, but that ain't going to change the fact that the 500L is not a good motor, it was OK back in 2008, but when held to today's standards, it's garbage.

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03-19-2015 01:39 AM  3 years agoPost 9
Funky Trex

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Westerville, OH - USA

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I am not a big Trex 500 fan but I have had a few with various motors including the original, Scorpion 1400 and MX model. I like the MX model and it was more efficient than my original 500 motor. The MX has a good price, plenty of power and works great. I agree with replacing the original motor. It works fine but there are definitely better options that are pretty reasonable.

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03-19-2015 02:51 AM  3 years agoPost 10
jason46

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MI

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What about one of these, I fly one in a lepton with 4s and it does great.
http://www.e-fliterc.com/Products/D...rodID=EFLM4025H

We made up some rules can we have your moneys now.

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03-24-2015 03:56 AM  3 years agoPost 11
emederos

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Miami, Fl Dade

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I'm definitely going to upgrade the motor, I would like anothe more powerful motor to have that extra headroom and better efficiency. I had the MX on my other DFC 500e pro and never remember it getting this hot. Same 5000mah pack and setup .just different align blades and I assume FBL heads create les load on the motor due to less rotating mass from the head. Just bought an align EFL head will get that installed in the future

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03-24-2015 01:14 PM  3 years agoPost 12
pctomlin

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Texas

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Remember, hot to the touch is about 120 deg F so you may not be "hot".

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03-24-2015 02:47 PM  3 years agoPost 13
emederos

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Miami, Fl Dade

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I was looking into the scorpion hk3226 itz double the power, 40g heavier and i assume is able to handle hotter temps due to the load from my heavy ship better

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