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Other › What's to hot for an ESC
07-09-2008 02:39 PM  9 years agoPost 1
pixturethis

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Wichita, KS USa

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I'm running a 430L motor with a align 35 amp esc with a 15 pinion. After a 6 min. run the esc is reading 135 degrees. Is this to high or I'm I ok. The esc is mounted under the battery my tc is 100-80-70-80-100.
Thanks great forum, & awesome heli.

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07-09-2008 05:46 PM  9 years agoPost 2
Terrabit

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Seattle, WA - USA

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That seems hot to me. I think you'll be better off running a flat throttle curve in gov mode. ESC's, in general, run cooler with flat t-curves. V-curves are more appropriate for nitro helis where headspeed can surge at mid-stick. I don't believe E-helis benefit from v-curves. 30% is a lot in any case. I've never done more than 10 or 15%.

I cut a hole in the underside of the canopy so I can access the battery connectors. But it also helped to cool things down a bit.

You might also consider dropping a tooth or two on your pinion. How hot is the motor?

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07-09-2008 06:17 PM  9 years agoPost 3
eggmcmuffinplz

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That pinion is a too big for that little motor. put a 13t on and runn your curves 100 across.

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07-09-2008 06:42 PM  9 years agoPost 4
pixturethis

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Wichita, KS USa

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Thanks for the help, I'll try a 13 pinion. The kit says it comes with a 14 & 16, but both of mine came with 13 & 15's.
With running a flat curve, how do u stop it from over speeding on decents or on a down line at 0 dregrees of pitch. & I've heard the gov. setting kills the battery, is that true !
Thanks Marc

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07-09-2008 07:31 PM  9 years agoPost 5
eggmcmuffinplz

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No, 100 is best for the ESC and a governor on an electric is a waste of power.

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07-09-2008 07:42 PM  9 years agoPost 6
pixturethis

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Wichita, KS USa

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I'll try the 100 tc, but it doesnt make sence to me, & the 13 pinion. So I guess u just run a screaming headspeed ! What do u do if u want a slower headspeed, I like about 2900, I'm only a sport flyer.

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07-09-2008 08:58 PM  9 years agoPost 7
pixturethis

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Wichita, KS USa

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Terrabit,
My motor is 121, battery 112
I have a hole in the bottom of the canopy.
Thanks

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07-09-2008 09:13 PM  9 years agoPost 8
eggmcmuffinplz

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Actually thats what it is on a 13t 100 across.

http://www.readyheli.com/Online_Hea...ulator_s/81.htm

3s
150 teeth
13t pinion
3550kv
85-90% efficiency
2903-3074

I fly 3D and its just fine. but my heli is extremely light

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07-10-2008 12:35 AM  9 years agoPost 9
jamesppp

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carrollton georgia usa

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You should try an 11 t for sport flying if the align motor is 3550 KV. The manual even suggests this pinion for a 3500kv motor. The Beam flies good at 2500 to 2800 too. Temps are very good and flight times are 7.5-8minutes,
I have a Scorpion 2221-8, 11t pinion CC-35 esc and to keep everything nice and cool, a Castle switching BEC.

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07-10-2008 01:47 AM  9 years agoPost 10
Terrabit

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It's all good my brutha from anutha mutha! The head won't "scream" if gov mode is properly enabled. The idea is that the head will maintain a steady speed because it is "governed" by the ESC.

Let us know how this works out.

t-bit

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07-10-2008 02:56 AM  9 years agoPost 11
pixturethis

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Wichita, KS USa

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Thanks for all the help. I'll have to try it out tomorrow. I'll get back with you all about how I like the way it flies with the changes.
Marc

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07-10-2008 03:42 PM  9 years agoPost 12
Ozydego

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Westerville, Ohio

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On the align motor, 13 tooth will give you 2900 HS, 12 tooth will give you 2600. The align pinions work great and give you more flexibility. If you want to run higher throttle curves but do not like the speed, lower the pinion a tooth.

But Honey, I can't live with just stock.....

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07-10-2008 04:17 PM  9 years agoPost 13
pixturethis

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Wichita, KS USa

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So what u'all are saying is to run a flat curve of 100 percent & change the pinion to give you the rpm's you like. But if that's true how does the motor not over speed at lower pitch setings like hover or not bog when at 11 degrees of pitch. Does the motor has like it's own govenor built in. I'm new to electric heli's but have flown nitro's for 6 years, well 8 years ago I flow nitro's. I've noticed that the electrics don't bog or overspeed as much as nitros. Is this really the way they fly ?
Thanks

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07-10-2008 05:39 PM  9 years agoPost 14
Terrabit

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Seattle, WA - USA

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So what u'all are saying is to run a flat curve of 100 percent & change the pinion to give you the rpm's you like.
On a 325 size electric heli, yes. 90%-100% is well within reason. Larger electric helis sometimes benefit from increased headroom or a lower throttle curve (80% or so) to accomodate increased amp draw associated with disc loading a heavier heli. Either way, your best results will come from picking a flat throttle curve and then choosing a pinion that will give you your ideal head-speed.
But if that's true how does the motor not over speed at lower pitch setings like hover or not bog when at 11 degrees of pitch.
OKAY PAL! Check it out! The speed of an electric heli motor is controled by frequency pulse modulation = Revolutions Per Minute = RPM's, NOT how much gas OR current is applied. The governor picks a frequecy/RPM according to your throttle curve and adjusts amperage to maintain that frequency. In a perfect world, your head-speed would remain constant - no matter what you are doing - no bogging/over reving)
Does the motor has like it's own govenor built in.
Uh ... no. The govna uv Califonya (mocking Arnold Schwartzeneger) is in your $@&*@? ESC!!! The motor gets all of its operating data from the speed controller. That's why they call it a speed controller! It controls the speed!

No offense to anyone, just having fun here people!
I'm new to electric heli's but have flown nitro's for 6 years, well 8 years ago I flow nitro's. I've noticed that the electrics don't bog or overspeed as much as nitros. Is this really the way they fly?
Yes my friend, today's E Helis truly "Rock the Casbar"!!! Woka woka bow wow! Da dump da doo! Ba dump dum, Csshsshhh!!!

Anyone care to offer any further refinement or correction of my dissertation, or the subtlty of my vernacular, or got any jokes?

Caffein is a powerful drug!

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07-10-2008 07:05 PM  9 years agoPost 15
pixturethis

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Wichita, KS USa

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Thanks

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07-11-2008 03:12 AM  9 years agoPost 16
Ozydego

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Westerville, Ohio

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If you are running the ESC in governor mode, I would use a flat 100% curve. With the align motor and speed controller not in governor mode, the ideal settings to compensate for bog is 1% throttle increase for every 1 degree of pitch. On the Trex in idle up it was -10 to +10 pitch, so the throttle curve would be 100, 90, 100. if running say -2, 0, +10 in normal mode, I use 0, 90, 100... or because I liked a lower headspeed in normal mode, I used 0, 80, 90.

Now, on my beam, I run -11 to +11... I still use 100,90,100 in idle up 1, and in idle up 2 I use 100,95,100... I use idle 2 for fast flips and rolls, tic tocs and things... this way the headspeed doesn't slow as I cross center stick... I will prolly change to 100 all the way across in idle 2 in the future.

Does this help or make things more confusing???

But Honey, I can't live with just stock.....

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07-11-2008 04:02 AM  9 years agoPost 17
pixturethis

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Wichita, KS USa

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Yes OZY it is making some sense, but not a lot yet. I tried the 100 90 100 today w/ the gov on. I droped it down to 100 85 100, & I like it better. I'm running the 13 pinion, the heat went down some, I don't have my temp reading buddy here this weekend but I can feel its cooler, motor, battery, & esc. I'm trying to get to doing tictoc's but not there yet.
Thanks for the help

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07-11-2008 03:35 PM  9 years agoPost 18
Ozydego

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Westerville, Ohio

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anoher thing that causes a lot of heat is the wrong timing on the programming of the esc. I had mine set to agressive and things got hot, I changed it to the middle setting and it was so much better.

I believe timing is the second question. the settings I use and recommend for the ESC prgramming are 1.low (stick), 2.mid, 3.mid, 4.mid, 5.mid. Make sure when programming the esc that you reset your throttle curves to 0, 50, 100

Other things that can cause heat are tight gear meshes and tight tail belts....

But Honey, I can't live with just stock.....

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07-11-2008 04:10 PM  9 years agoPost 19
pixturethis

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Wichita, KS USa

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I did go through the setup on the esc & made sure the timing was at mid & the throttle end pionts were set.
Now i'd like to learn about the kv rateings on the motors.I see some running a 1700kv w/ a 11t pinion & other's running 3700 kv, but that's for another time.

So what kind of temps should I be looking for. The manual for the esc says that 176 degrees is max, so, I'm way under that. Can't find a max temp for the motor though. I like the way it flys with the 15 pinion.
Thanks for all the help, lots to learn still.

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07-11-2008 08:49 PM  9 years agoPost 20
Terrabit

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Seattle, WA - USA

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I can't imagine many people are running a 1700kv motor in an E4. It would spin at roughly half the speed of a 3400kv motor if the same voltage is applied. (3s vs 4s lipos) A kv rating is a rough equivelant of how many rotations per volt the motor shaft will turn.

My Logo 600 uses a 680 kv motor (Tango 45-7)on 10s with a 13t pinion. It SCREAMS!!!

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