EquinoxRC Posted June 28, 2014 Share Posted June 28, 2014 (edited) So lets, see, i hope someone can help me with this. Lets say i have a XP SC700-BL ESC / Reedy 540-SL 3300kV combo, on AE website it says that both can take 3s LiPos, but the max Kv on 3s is 3500kV, does it mean that the 3300kV can run 3s without problem? The motor says: "Max. Efficiency Current: 10~40A" does it mean that 40 is the max Ah it can use? What if i use a battery that gives 100Amps, will it blow up, or will it only use the max Amps that the motor can use? RC Electronic Specs are very confusing Edited June 28, 2014 by EquinoxRC Quote Link to comment Share on other sites More sharing options...
Noj Posted June 28, 2014 Share Posted June 28, 2014 Does the spec show: <3500kv ? 3300kv will be fine, providing you gear the set up correctly for 3s use. The motor draws current, so, if drawing 40a max, your pack (at 100a constant) is capable of providing what the motor requires, therefore isn't under any stress, and won't blow up. Quote Link to comment Share on other sites More sharing options...
EquinoxRC Posted June 28, 2014 Author Share Posted June 28, 2014 The specs on the ESC says max 3500kv so yhee, i supose its lower than 3500 will be fine. What do you mean with gearing? I need to set it up so that i don't put too much stress on the motor? Quote Link to comment Share on other sites More sharing options...
Noj Posted June 28, 2014 Share Posted June 28, 2014 All electric setups have a 'sweet spot', ie, where packs, ESC and motor are warm at most, with no one part being overly hot; heat leads to failure. Gearing is key to this, over/under gear and you will have issues. I suggest doing some research on the car you're running this combo in, to gain an idea of which gear set up is suitable. Always advisable to have a range of pinions to hand so you can experiment yourself. The key is not simply fitting a gear set up, heading out and just ragging your ride; better to do some high speed test runs, regularly stopping and checking the temps of packs, ESC and motor. That way, a problem is highlighted sooner, and hopefully before something expires! Temp guns are available on eBay/online retailers, cheap as chips, and worth having. Until then, if you can hold your finger on the can/ESC for more than five seconds, you may well be ok Quote Link to comment Share on other sites More sharing options...
EquinoxRC Posted June 28, 2014 Author Share Posted June 28, 2014 Ok, ty very much..I still have to buy my RC, but i like to know everything before spending my money I think i'il have alot of fun with my 1st RC Quote Link to comment Share on other sites More sharing options...
Noj Posted June 28, 2014 Share Posted June 28, 2014 Read the lipo guide (amongst others) on here, lots of sound advice to make sure you start on the right path Quote Link to comment Share on other sites More sharing options...
EquinoxRC Posted June 29, 2014 Author Share Posted June 29, 2014 Does anyone know what's up with this LiPos? -> Turnigy 5000mAh 2S 7.4V 60C Hardcase Pack They cost 16 Quote Link to comment Share on other sites More sharing options...
Noj Posted June 29, 2014 Share Posted June 29, 2014 Because they are turnigy lipos, and not expensive at all Quote Link to comment Share on other sites More sharing options...
EquinoxRC Posted June 29, 2014 Author Share Posted June 29, 2014 I know that they're suposed to be cheap but...But i think this is too cheap, its a 60C LiPo :S Anyways..I don't care! If it work i'm happy Quote Link to comment Share on other sites More sharing options...
EquinoxRC Posted June 29, 2014 Author Share Posted June 29, 2014 (edited) Is there any problem with using 2s LiPo on a Stock Brushed car? The car's manual says that the ESC is incompatible with LiPos and the use of LiPos will damage the esc..Why is that? Heat problems? Lower gearing will let it run with LiPos? Can i use a 200A ESC with a 80A Peak Motor? (Just an example) will the ESC give too much power to the motor? Or will it only give 80A Max to the motor? Edited June 29, 2014 by EquinoxRC Quote Link to comment Share on other sites More sharing options...
mattr Posted June 29, 2014 Share Posted June 29, 2014 LiPos deliver a lot more wallop than nimh. Current and voltage, and there is minimal dip under high loads, so it'll deliver as many amps (within limits) as you want, at 8.4v. A nimh will start off with less voltage, and then dip as you nail the throttle. So you are restricted on both current available, and voltage. Lipo compatible escs aren't expensive. Quote Link to comment Share on other sites More sharing options...
Tug Posted June 29, 2014 Share Posted June 29, 2014 Is there any problem with using 2s LiPo on a Stock Brushed car? The car's manual says that the ESC is incompatible with LiPos and the use of LiPos will damage the esc..Why is that? Heat problems? Lower gearing will let it run with LiPos? Can i use a 200A ESC with a 80A Peak Motor? (Just an example) will the ESC give too much power to the motor? Or will it only give 80A Max to the motor? The motor DRAWS as much current as it needs, ESCs don't force-feed current, they simply pass on the current the motor is demanding. Quote Link to comment Share on other sites More sharing options...
stretch Posted June 29, 2014 Share Posted June 29, 2014 (edited) Is there any problem with using 2s LiPo on a Stock Brushed car? The car's manual says that the ESC is incompatible with LiPos and the use of LiPos will damage the esc..Why is that? Heat problems? Lower gearing will let it run with LiPos? Can i use a 200A ESC with a 80A Peak Motor? (Just an example) will the ESC give too much power to the motor? Or will it only give 80A Max to the motor? It possibly means that it doesn't have LVC low voltage cutoff so would need to use an external alarm but someone would need to confirm as never used that esc. Edited June 29, 2014 by stretch Quote Link to comment Share on other sites More sharing options...
EquinoxRC Posted June 29, 2014 Author Share Posted June 29, 2014 Its ok, i found a 7 Quote Link to comment Share on other sites More sharing options...
'83Junglizt Posted July 1, 2014 Share Posted July 1, 2014 LiPos deliver a lot more wallop than nimh. Current and voltage, and there is minimal dip under high loads, so it'll deliver as many amps (within limits) as you want, at 8.4v. A nimh will start off with less voltage, and then dip as you nail the throttle. So you are restricted on both current available, and voltage. Lipo compatible escs aren't expensive. i just got an Absima 210001 brushed ESC for a HPI 15T motor and that'll accept 2S batteries.. ! nice 3 year anniversary prezzie from the missus...! Quote Link to comment Share on other sites More sharing options...
EquinoxRC Posted July 2, 2014 Author Share Posted July 2, 2014 What kind of batterys do you guys use for the transmiter? rechargable AA batteries? or NiMH sticks? What is the best? Quote Link to comment Share on other sites More sharing options...
suicideneil Posted July 3, 2014 Share Posted July 3, 2014 What kind of batterys do you guys use for the transmiter? rechargable AA batteries? or NiMH sticks? What is the best?Normal non-rechargeable batteries will give better voltage ( higher starting voltage- 1.5v vs 1.2v for rechargeables ) so will last longer as a rule ( once the voltage drops too low the transmitter will cut out ), but that becomes expensive too replacing them all the time, even with cheap batts. I use Enerloop rechargeable batteries- probably the best brand around and will last for thousands of charges without losing much capacity. Quote Link to comment Share on other sites More sharing options...
EquinoxRC Posted August 1, 2014 Author Share Posted August 1, 2014 (edited) New Question! Let's say i buy this ESC: HobbyKing X-Car 45A Brushed Car Continuous Current: 45A Burst Current: 320A (10sec) Does this mean i need to buy 5000mAh 60C LiPos? Or i just need to buy enough for the 45Amps? What happens if my Battery can only output 200Ams? Edited August 1, 2014 by EquinoxRC Quote Link to comment Share on other sites More sharing options...
Tug Posted August 1, 2014 Share Posted August 1, 2014 The ESC doesn't dictate Amp draw, the motor does that. The motor draws what's required, the ESC is just a valve in between the motor and batteries. Quote Link to comment Share on other sites More sharing options...
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