Motor

[Vladconnery]

I have had 2 motors in my 7hv an align 850mx and now a scorpion 4525-520. After a 5 minute flight both motors come down hot. Whats hot you ask. Unable to grab the motor with my hand hot. By contrast I have an atom and a warp both with scorpions after 5 minutes flight they are warm but never hot I can actually fly back to back packs without them getting hot to the touch.

My question is could this be the esc I was using a phoenix edge 160? Or is it something else that I'm just missing all together. I have checked my mesh and its not to tight. I am not a 3d pilot by any stretch of the imagination. At the most I like to do full stick + and - pitch pumps. Nothing that should cause the motor to get hot. Or is it that I just don't get that a 700 size heli motor is going to be hot no matter what?

I was about to trade my 7HV away for another warp or atom. However I have at the moment decided to keep it. I am switching ESC's what would be a good ESC to go with as a replacement.

Geared at 13T pinion IU1 1700 IU2 1900 IU3 2100 I fly on IU2 95% of the time I have and also tried a 14T pinion with the same result.

I installed the spacer between the motor and the mount so the pinion is not rubbing as well there is at least 3mm room between the tip of the pinion and the supporting motor mount.

[quinn]

I would keep the castle. Mine works great with the scorpion 4530. In warmer weather, the scorpions will get hot. Also the aligns. Is it to the point where it burns you when you touch it? Or you just can't hold your hand on it for long? If your not already, put your motor settings at 8khz pwm and low timing. What is the temp outside? If its over about 75F, its normal for the scorpions to get hot. With the magnets and wire they have, they can handle rediculous temps. Just watch the internal temp of your esc on the logging. If its below 190 or so I wouldn't worry about it.

[Vladconnery]

I'm in NC ambient temp here is going to be 85 and above most days during the summer. I am going to switch esc regardless. I've been using castle for quite some time no issues. I got a YGE in a trade thats going on my Atom and I think I am going to switch all of mine to YGE. would you recommend a 160 or 120 for the 7hv?

[quinn]

160hv especially if temps are normally high. A scorpion getting hot when its 85 out is definately normal. Nothing to worry about.

[Scott Bowersox]

Agree with quinn. The Scorpion 4525-520 will get hot with either esc. I can't keep my hand on it comfortably after a good flight, but it's not scalding either. It's been around a long time and known to run warmer the whole time. I'm using the YGE 160 and doesn't make the motor cooler. Just one of them things. But hot to you is not hot to the motor which is fine to 200 C or something silly before you start to lose magnetism. I have scorps in my 450's and 500 size machines and yeah they dont typically get as hot. It's specific to motor windings/wire etc as mentioned.

[crf69]

mine gets so hot its crazy......but im ok with it.

[Ah Clem]

I have a Scorpion motor in my Logo, and it gets so hot you could fry an egg on it. I think this is just a characteristic of the Scorpion motors-it runs great and has given good service. I do lube it every 5-6 flights or so as recommended by Scorpion.

I have the stock motor in my 7HV and it gets pretty warm, but nowhere near as warm as the Scorpion does.

[Twill]

I run a yge 160 and that motor and mine gets hot to its normal.


Team aircapitalheli.com

[Lighty]

I run the nick maxwell motor, it producers more torque than the ultimate. After pounding on it I can have my hand on the top of the can for 5 sec. 2 sec would be around 70-75 degrees. HS 2150 13 tooth

Gear ratio and settings are crucial.

[Twill]

Ya same with my xnova motor^^^


Team aircapitalheli.com

[GimpyGolden]

Originally Posted by Twill

Ya same with my xnova motor^^^


Team aircapitalheli.com

And my Pyro 750.

[timay]

A couple of thoughts, and bear in mind I'm no expert:

I would fiddle with ESC timing settings to see if a different setting will make a difference. In the CastleLink screen, it says a higher timing will yield a hotter motor. An easy test would be to use the lowest timing and see how it goes.

As an experiment I would try to fly the motor as close to 100% throttle as possible. This means making sure the Castle throttle endpoints are set correctly, and may require changing pinions if you end up with a head speed you're not comfortable with (ie too high). In my experience a motor that is not working in it's peak efficiency range will come down hot (lots of load at low motor RPMs).

I have a general question, also: Would head speed affect motor temperature? With a motor at 100% throttle and a pinion that allows a low head speed generate more "unhealthy" motor load and heat than 100% throttle with a pinion that allows a high head speed, assuming the pilot is flying consistently (smack 3d or big air sport)? Something that may be fun to experiment with (I have always run higher head speeds).

(Edit) Another thought: Pitch limits! Higher collective and cyclic pitch limits will put more stress on the motor and electronics. Try lowering your collective and cyclic pitch limits (in the FBL controller, not in the transmitter) and see if that makes the motor cooler. Obviously there's a temperature vs performance balance here, but if you're running something crazy like 15 degrees that may be it.

[timay]

Hijack: What did you think of the Align 850MX? I'm using a 700MX now, and I'm thinking of upgrading. What did you use before the 850MX, and did the 850MX make a significant difference?

[TheBum]

Originally Posted by timay

I have a general question, also: Would head speed affect motor temperature? With a motor at 100% throttle and a pinion that allows a low head speed generate more "unhealthy" motor load and heat than 100% throttle with a pinion that allows a high head speed, assuming the pilot is flying consistently (smack 3d or big air sport)? Something that may be fun to experiment with (I have always run higher head speeds).

It's hard to say. The motor would be spinning faster with the smaller pinion at a given head speed, which might heat up the bearings more, but the coils should be cooler because the torque load would be lower and you wouldn't be pumping as much current through them.

[quinn]

Its been my understanding that gearing to run closer to 100% is better for both the motor and ESC.

[Rob43]

On the other hand, I've run a good variety of motors on my Jive 120.

HKIII 4035-560 @ 2200 rpm - quite hot, but within acceptable levels
Align 700MX-510 @ 2000 rpm - cool to the touch, never much more than ambient
Compass 4926-510 @ 2000-2200 rpm - warm
Pyro 700-52L @ 1700-2300 - cool to warm, respectively
Xera 4530-500 @ 1600-2100 - warm

Jive never hot. Just warm when running the higher headspeeds. No holes in the canopy. Never an issue.

[cyclo]

Both the stock Compass motor V2 and Scorpion ran hot on my 7HV. When I was doing the setup checking for vibes and ran the Compass motor for the first time (without blades) I actually smelled burning oil LOL.

I oiled it (Compass) right afterwards and it worked fine. However, I have since replaced the stock Compass with Scorpion. On 13T pinion at 100% throttle ungoverned, the 7HV is a rocket (even faster than my Atoms) on the Scorpion. On the Compass motor, it was not as fast... definitely slower than my Atoms (stock and stretched).

Again I might have gotten a lemon Compass motor but that is my experience. I ran both using 8 PWM and 18 degrees timing on YGE ESCs.

[quinn]

I'm curious if the compass motor pairs up better with konttonic esc's. Supposedly all the chronos's at ircha had the stock motor in them and they were fast! Pilot skills make a big difference but even when they were standing it up on the tail and launching it across the field it was amazingly quick. Pretty much just as fast as my scorpion 4530.

[cyclo]

Originally Posted by quinn

I'm curious if the compass motor pairs up better with konttonic esc's. Supposedly all the chronos's at ircha had the stock motor in them and they were fast! Pilot skills make a big difference but even when they were standing it up on the tail and launching it across the field it was amazingly quick. Pretty much just as fast as my scorpion 4530.

It could that they are using 14 or 15T pinions. I was not able to test the motor with a 14T pinion. Maybe one of these days... I have spare motor mounts so I can just swap it back in. I got them as they were on sale at Helidirect.

[Lighty]

Could be many things, I had the same experience as cyclo, my motor was week.
The scorp nick maxwell edition was when I really started to enjoy the model.

It's a beast now