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Post by pasquale91 on Jul 22, 2014 17:58:34 GMT 1
I went back to flying my cub more lately.
On the last flight I had, directly after launch, the motor
started running intermittently. Brought the plane back in,
changed batteries and had the same happen. We re-bound it to
my DX-6i and the same result. Checked it on a DX-4, and a DX-8i
with the same ending. All my other 3 planes fly on the DX-6i with
not issues.
Am I looking at a bad motor or a bad ESC?
The rest of the servos worked flawlessly.
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Post by sham on Jul 22, 2014 19:08:27 GMT 1
My guess would be esc, but try running the motor with power applied directly.
Motors tend, with some exceptions, to either work or not work... But it could be as simple as a dodgy solder vibrating loose.
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Post by flydiver on Jul 22, 2014 19:23:52 GMT 1
Yep, bad ESC or a bad connection.
Check connections carefully > stress and wiggle. If they are OK it's probably the ESC. The Cub ESC is not a great piece of electronics, unfortunate for a $50 replacement of a proprietary part.
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Post by hghost on Jul 23, 2014 5:44:29 GMT 1
SC most likely the Bullet Connectors from Motor to ESC...if not ESC itself. ( My guess Connectors got loose from all the vibration and moving them around )
Let us Know .
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Post by pasquale91 on Jul 24, 2014 21:41:00 GMT 1
I went ahead and ordered the ESC.
The plane is up at the camper, will check the connections
when we get there tomorrow morning.
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Post by pasquale91 on Jul 28, 2014 20:38:03 GMT 1
Connections were tight on the old ESC.
Installed the new one and had no issues all weekend.
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Post by flydiver on Jul 29, 2014 2:16:48 GMT 1
What prop are you using?
Do you fly a lot at full throttle?
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Post by pasquale91 on Jul 30, 2014 23:13:29 GMT 1
Stock prop, no more than 3/4 throttle even in our
Texas winds.
Aircraft is close to 2 yrs old.
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Post by flydiver on Jul 31, 2014 5:45:56 GMT 1
10x8-black with yellow tips or gray 9x6?
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Post by pasquale91 on Jul 31, 2014 12:26:06 GMT 1
Black 9X6 that came with it.
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Post by flydiver on Jul 31, 2014 15:39:07 GMT 1
That should have been OK.
Sounds like you just got a funky ESC. Unfortunately not as rare as it ought to be, especially for the price. Not nice of them to make a combined unit like that from the customer perspective. Good for business though...
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Post by pasquale91 on Jul 31, 2014 19:57:27 GMT 1
I'm with you on the cost.
$45 for the DSM Cub Version.
And $55 for the Cub S with SAFE ESC.
I just picked up a Turnigy 30 Amp for another project for $12.
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Post by flydiver on Jul 31, 2014 21:01:25 GMT 1
The Spektrum RX insided is the thing, they ain't cheap by themselves. They rarely go bad, the ESC often does. So, you end up buying both to get what you need at 1/4 the cost of the entire plane. I for one will not buy anything proprietary anymore if I can possibly avoid it. I had to learn that the hard way like everyone else.
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Post by pasquale91 on Aug 1, 2014 17:43:29 GMT 1
I may see if I can salvage the RX then.
I have a foam-board F-22 I may use it on
and save my other new RX's for something else.
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Post by flydiver on Aug 1, 2014 23:30:38 GMT 1
It's setup for rudder elevator. The F22 is a delta/elevon?
Not sure if you can do that....maybe.
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