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It is most likely a timing issue. As Jim suggested. Up the timing incrementally from soft. I have done this to solve issues on higher pole motors. And yes, I have done it with the 40.160 same as you are using.
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Jay, it could be if the cells are not holding under stress... it happened to me before, with PolyRC as well. I also happened to me in a 1/10 car with bad Tanic packs and an MGM controller.
One way to find out is have a buddie's newer (or know to work under the same stress) pack in there and give it whirl...Last edited by Ub Hauled; 11-24-2009, 06:10 PM.:::::::::::::::. It's NEVER fast enough! .:::::::::::::::Comment
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Jay :
"heavily detunged" 457 prop, that's a piece of cake for that motor.
I agree , we NEED to know more about the boat/setup from the topicstarter.Last edited by Gerwin Brommer; 11-24-2009, 03:15 PM.Comment
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No bets without the pics :-)Comment
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Hi Guys,
I was using a x452/2 blade prop and nothing was anywhere near hot. I am very sure its not a batteries in 1p problem or a battery problem . These motors on 1p are used in other cats bigger then mine and even some 1/8 and 1/7th scale hydroplanes with no issues what so ever. I believe after much reading that it is a timing issue being too low and i don;t have a schulze cable to adjust the timing on the esc at this stage so the project will be put aside for a while.
Thanks for your replies and input.
TrevComment
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You should try borrow a data logger for a test run just to eliminate voltage sag for certain.Comment
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I cannot see what timing has to do with your problem. If you have the incorrect timing, the motor will get hot or not perform up to par. There is nothing in the timing equation that would cause the cutoff. You have an LVC problem. I have been flying and running electrics for many years and have seen your problem dozens of time. It has ALWAYS been an LVC problem. Lower the LVC on the esc to 3.0V or 2.8V (per cell) and I'll bet your problem goes away!
Mini Cat Racing USA
www.minicatracingusa.comComment
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Older schulze's and kontronik esc's need a firmware update to run high polecount outrunners.
As soon as the esc gets confused by saturation and/or too much rpm, it will cut out.
Regards,
NathanComment
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Need to check the voltage of ever cells of your lipo, if one cell shows lower volts than others, that might contribute to this kind of behaviour.
I agree with Salir, its not the timing issue, even zero timing it still run smoothly, higher timing increase speed but heat up fast. I have been running outrunner on my brother's truggy with 4s, the torque is so powerful, amp draw is low since the esc(seaking 60A) hardly get warm and the runtime is much longer compare with inrunner. The motor had been rewind and added more magnets from 6 to 14 and its only 830kv. Maybe Im gonna switch all my boats using outrunner motor since the magnet and winding can be replaced
Stiletto tunnel,EPV135 (53") twin cat, CT06"Spirit of Qatar", FD 47" mono, Twin Mini Cat 23.5"Comment
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maybe timing is not what he meant to say, is it the PWM rate?:::::::::::::::. It's NEVER fast enough! .:::::::::::::::Comment
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The pack would have to be right scribbled.
This isn't your brothers truggy were talking about
That prop is nothing for that motor.
It's a simple rpm limitation, the neu 15 series motor has 4 poles, the scorpion has 8, the esc must switch twice as fast to keep up.
The esc has a tough time indexing the rotor position when under load due to magnetic saturation and the high switching rate.
It's a very common issue over on the heli side of things.
A simple trip back to schulze for a firmware update will fix it up.
Heck, the really old poptarts couldn't even run the neu 15 series, because they were 4 pole as opposed to the 2 pole motors that were popular at the time.
Regards,
NathanComment
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Stiletto tunnel,EPV135 (53") twin cat, CT06"Spirit of Qatar", FD 47" mono, Twin Mini Cat 23.5"Comment
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It is the timing or LVC and that's it. last thing to look at is a cold solder joint!
ScottComment
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