New to electric. Need a little help!
After making the switch to electric power I quickly decided that my .40 trainer needed to be electric too. With the conversion complete I run the motor up for a test... at roughly 3/4 throttle the engine makes a nasty noise and stops. If I bring the power down I am able to start the motor again. Here is my setup.
- Rimfire .32 motor
- Turnigy AE-80A ESC
- Zippy 5000mah 4s Battery
- Swinging a 12x6 prop
I have tried just about everything I can think of.
- Multiple prop sizes (down to 10x6)
- Changing the timing to all settings
- Voltage cutoff settings
- Break settings
- a 2200mah 3s battery
The only major difference that I can see from changing these things is in the timing. Higher gives me a touch more power before it quits.
I have a youtube video of my motor going through a run up that I will post if that will help.
Any info or advise would be awesome!
Thank you in advance!
Here is the youtube of my issue.
Do you have access to one of those wattmeters to see how much current and how much power you're pulling? Have you tried to run the motor with no load, as in taking off the prop?
Also make absolutely certain all your solder connections between the ESC battery connector and all three phases of your brushless motor are solid. If vibration is causing a bad connection to get flaky, that might do it.
Another thought, can you run your receiver on a separate battery pack? If you do so, don't forget to temporarily disconnect the red wire of the ESC servo connector by lifting the plastic locking tab and pulling the red wire out. Be sure to cover that lead with tape while testing.
Do you by chance have access to another ESC?
sometimes one brand of ESC's doesnt play nice with another brand of motors.I had this samething happen with a setup I was going to use. I had to use a different brand esc problem was solved. Denny good call on check the soldier joints found a couple of mine were not up to snuff.
Set the Throttle Curve on the ESC, That Might be the problem.
Yea, sometimes a motor and esc dont like each other ::o try another brand of ESC. From what I have read, Rim Fire Motors tend to be Finicky with ESCs
You may need to use a Great Planes ESC with the Great Planes Rim Fire Motor,
setting throttle curve
Info from Wattflyer Expert, Nigel
Quite a few ESC need to see the FULL range of throttle stick movement ... so for setting it up :
a) Switch on TX
b) Put trim all way DOWN
c) Put stick all way UP to max throttle
d) Plug in model battery pack
e) Listen for beep
f) Return Tx throttle stick to DOWN minimum throttle position.
g) Listen for confirmation beep
Power of both.
Now test ...
1) Switch on Tx
2) Put throttle trim to mid point
3) Throttle stick to idle position
4) Connect battery to model
Listen for beeps / music if enabled.
Try throttle ... you should have full range now.
If not ... reverse Tx throttle and try above set-up again ....
It's always good as well if you have a Throttle Cut or Hold you can activate when connecting model battery's ... but this will inhibit arming of motor till switched of.
Man, that really looks like a timing issue to me.
(Or, possibly, an over-amp problem though, if you were drawing too much current, dropping the prop size should have fixed it.)
Looks to me like the esc is loosing sync at higher power levels.
Thats usually an esc problem, but occasionally its a miss-wound motor or one thats shorting internally. If going to max timing and minimum timing havent fixed it, then you likely need to start swapping out parts.
I'd bet on a bad esc first.
Have you tried a MUCH smaller prop or no prop?
And yes - wattmeter readings would help - to rule things out if nothing else.
Bad ESC timing for the motor or too much prop.
Intermittent shorting phase to phase.
Get some electrical tape and wrap the connections between ESC and motor.
Simple and cheap and it might fix it.
Rimfire Motors and Turnigy ESC dont Go together very well, IMHO I dont like Rimfire motors at all.
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Rimfire 1.20 in Seagull Spacewalker http://cdn2.bigcommerce.com/re33f314...IcoRating5.gif
Posted by John M on 8th Apr 2013
Have used Rimfire motors for long time with a lot of others, Rimfire are long lasting and trouble free.
The 1.20 has been interesting to use. The Spacewalker is 11lbs with the 6S 5000mah 25/35c battery. Flight times around 7 to 8.5 mins, depending on throttle use. This is my biggest electric so far and is a surprise packet. I also fly an Edge 540T same weight OS 120AX..
Using a 17"x8" APCe prop the Spaciereally surprised with a <20 foot take off run. Eat your heart out Edge540t!! The Rimfire easily pulled the Spacie through knife edge! Naughty, not very scale!
A problem started with a high pitched squeal from the motor.. From previous experience, this is a timing mismatch with the ESC, a Turnigy in this case. Was going to experiment, BUT I had an Electrifly ESC right size in stock, so simply changed them over.. Exit timing mismatch.
The prop noise is a sort of realistic sound.. Big diameter I suppose.. LOTS of good comments... Flown lots over 2 months now.. Just bought an 80 Rimfire for new Corsait... Works for me.
Wow! Thanks for the help!
I ran the motor without a prop and the same thing happens. Using a Rx battery didn't change anything either.
The ESC sounds like the problem after reading your replies. I don't have another that is high enough amperage (and not turnigy) to try it though. Ill ask some friends to see if I can borrow one of theirs.
I will keep you posted on my progress!
Just a point but if it does the same thing without a prop it wont be drawing anything like the full current so (again without a prop) it would be quite safe to run it up with a smaller ESC (30A?). If that cures the problem then you know its the 80A ESC. If it doesn't then it is the motor.
So being slightly broke and eager to fly I found a "solution" to my problem.
The plane flew great! :tc:
I'm planning to replace the speed control sometime soon, because I want to tow gliders with this model. Ill need all the power I can get. Plus this set up is a little annoying haha.
What was your solution?
I taped a piece of metal to my transmitter so I couldnt push the throttle into the range where it goes out of timing. see the picture
Your esc is already suspect. You are running the risk of loosing the entire model if that esc goes up in flames in the air.
The ESC and Motor dont match up, The ESC still might not be in perfect sync with the motor, and that could cause a lot of stress on the motor, I am not a Fan of Rimfire motors, IMHO, they are expensive and weak, IMHO the motors from Heads Up RC or Grayson hobbies are much better. Hope that helps, Chellie
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