brushlesswesty Posted March 4, 2015 Share Posted March 4, 2015 Hi guys New to the electric world , bought an Hpi trophy truggy flux second hand and it keeps losing speed on acceleration , sometimes won't respond from standstill throttle (very minimal ) Any ideas? Quote Link to comment Share on other sites More sharing options...
Vr5fx Posted March 4, 2015 Share Posted March 4, 2015 Hi guys New to the electric world , bought an Hpi trophy truggy flux second hand and it keeps losing speed on acceleration , sometimes won't respond from standstill throttle (very minimal ) Any ideas? If the steering is fine then it might be LVC (Voltage cut off) Ensure your LiPos are charged fully then try again. Quote Link to comment Share on other sites More sharing options...
RCpete Posted March 4, 2015 Share Posted March 4, 2015 Is it just cutting out now and again? Quote Link to comment Share on other sites More sharing options...
brushlesswesty Posted March 4, 2015 Author Share Posted March 4, 2015 Is it just cutting out now and again? Hi mate Yes it was just here and there nothing drastic just no response sometimes then it would all off a sudden! Quote Link to comment Share on other sites More sharing options...
brushlesswesty Posted March 4, 2015 Author Share Posted March 4, 2015 If the steering is fine then it might be LVC (Voltage cut off) Ensure your LiPos are charged fully then try again. Yes did think this will try a full charge and go again and let you know.... And if the steering wasn't then it would be what ? Cheers for the help Quote Link to comment Share on other sites More sharing options...
brushlesswesty Posted March 4, 2015 Author Share Posted March 4, 2015 Ok so I've just taken the lipos out plasma 7.4v 5300 x2 there is very slight swelling ie the sides have a slight swell at most a mm at a guess , there not dead sqaure or flat as it were , is this ok? Quote Link to comment Share on other sites More sharing options...
Vr5fx Posted March 4, 2015 Share Posted March 4, 2015 Slight swelling is pretty normal in LiPo packs. If you are concerned you can store them outside. Give this a read: http://www.msuk-forum.co.uk/topic/21028-lipo-the-big-guide-thread-updated-march-10/ Quote Link to comment Share on other sites More sharing options...
brushlesswesty Posted March 4, 2015 Author Share Posted March 4, 2015 Slight swelling is pretty normal in LiPo packs. If you are concerned you can store them outside. Cool will have a read and thanks for the help Give this a read: http://www.msuk-forum.co.uk/topic/21028-lipo-the-big-guide-thread-updated-march-10/ Quote Link to comment Share on other sites More sharing options...
electrolike Posted March 20, 2015 Share Posted March 20, 2015 Hi am having the same issue and wondered if you found a fix for this. Quote Link to comment Share on other sites More sharing options...
brushlesswesty Posted March 20, 2015 Author Share Posted March 20, 2015 Yes finally !! It was a faulty esc !!! Thanks all and hope it helps you electro like !!! Quote Link to comment Share on other sites More sharing options...
electrolike Posted March 21, 2015 Share Posted March 21, 2015 Yes finally !! It was a faulty esc !!! Thanks all and hope it helps you electro like !!! Unfortunately not, I thought it might be the receiver cutting out so replaced it and still the same, so thought it must be the esc but noooo, it's still doing it, would I be so unlucky to have had 2 bad esc's Quote Link to comment Share on other sites More sharing options...
brushlesswesty Posted March 21, 2015 Author Share Posted March 21, 2015 Unfortunately not, I thought it might be the receiver cutting out so replaced it and still the same, so thought it must be the esc but noooo, it's still doing it, would I be so unlucky to have had 2 bad esc's Mmm....that would be pretty bad luck to be 2 escs ! But u never know?! Did you replace it with a new or second hand one? Have you tried using someone else's lipos ? I feel your pain! Quote Link to comment Share on other sites More sharing options...
electrolike Posted March 21, 2015 Share Posted March 21, 2015 All was replaced with new, could it be the lipos, am fairly new to all this so didn't even think about the lipos Quote Link to comment Share on other sites More sharing options...
brushlesswesty Posted March 21, 2015 Author Share Posted March 21, 2015 All was replaced with new, could it be the lipos, am fairly new to all this so didn't even think about the lipos I can only advise what is as told to try mate, but yes dodgy cells in your lipos could be a cause ! Also was advised to get an extronix power cap , only a few quid so worth getting one anyone Let me know how you get im happy to help ! What model have you got? Quote Link to comment Share on other sites More sharing options...
Scoodee Posted March 21, 2015 Share Posted March 21, 2015 I would rebind it all mate Quote Link to comment Share on other sites More sharing options...
brushlesswesty Posted March 21, 2015 Author Share Posted March 21, 2015 I would rebind it all mate Hi mate rebind the motor ? Quote Link to comment Share on other sites More sharing options...
Scoodee Posted March 22, 2015 Share Posted March 22, 2015 Yeah I had the same problem with my trophy truggy flux so I done a rebind and it was ok ever since Quote Link to comment Share on other sites More sharing options...
Noj Posted March 23, 2015 Share Posted March 23, 2015 It is not normal for lipos to swell a little during normal use. Fact. Lipos swell when unable to provide the right current draw that the motor demands. C rating is all important, for an eighth scale, minimum 35c, 40c better, with a minimum of 5000mah. Do the math: 5ah x 35c = 175a constant 5ah x 40c = 200a constant etc.... Packs should always be able to supply more current than the can needs, ergo, they don't swell and cells 'should' stay healthy. Power caps can prevent RX brown out, as in, loss of signal owing to high current draw by the servo. Savox are renowned for causing brown outs, other makes not so much. Installing a ubec is the best option of course. Hth Quote Link to comment Share on other sites More sharing options...
electrolike Posted March 23, 2015 Share Posted March 23, 2015 I can only advise what is as told to try mate, but yes dodgy cells in your lipos could be a cause ! Also was advised to get an extronix power cap , only a few quid so worth getting one anyone Let me know how you get im happy to help ! What model have you got? I have a trophy truggy flux, what does rebind the motor mean. Quote Link to comment Share on other sites More sharing options...
Noj Posted March 24, 2015 Share Posted March 24, 2015 It means nothing. You bind a RX and TX together, then calibrate the TX with the ESC. Looks like folk need to do some reading about the basics of running leccy RC's and stop listening to crap advice from 'mates'. 1 Quote Link to comment Share on other sites More sharing options...
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