ESC going low voltage under full throttle.

[TwistedxSlayer]

I'll check it in an hour, and then before I go to bed, and then in the morning.

[TwistedxSlayer]

Charger says the 4600 is ready. It's at 8.6volts. The 3300 is holding at 8.4

[SteveU30]

Sounding promising!

[TwistedxSlayer]

3300 @ 8.32 4600 @ 8.27

[Percymon]

Thats good news - the next thing is to see how quickly they fall away with some use, and whether straight off they can cope with the motor demands

[TwistedxSlayer]

When I get home later I'll be carrying out some testing :-)

[TwistedxSlayer]

Right, I've just put them both on, one at a time of course, lol. Give them both full throttle straight off and same issues, the 3300 did work at full throttle for about 1/2 a second. Retested both batts, holding at around 8.2 - 8.3 volts

[alfagta]

Right, I've just put them both on, one at a time of course, lol. Give them both full throttle straight off and same issues, the 3300 did work at full throttle for about 1/2 a second. Retested both batts, holding at around 8.2 - 8.3 volts

hiya man,

this is odd , even low quality batteries in decent condition should be able to run that motor ,if it was a 5 turn single then i would expect the batteries to struggle , i cant find any info on the mtroniks 11x2 , i am wondering if the brushes or com are damaged/worn and the motor is trying to pull too much current , effectively going short circuit across the winding's , as i mentioned earlier voltage would need to drop very low for the esc to cut due to bad batteries so now i suspect the esc/ motor to be at fault , do you have another motor to try ?

edit:

even try the motor with the pinion removed to see if revs ok with no load .

[TwistedxSlayer]

Morning Alfa, I've got another motor I can test it with. I'll try that one now. It's just a Silver Can.

[TwistedxSlayer]

Silver can isn't working :-( but tried another one but no idea what voltage it's meant to be, but either way it's still cutting out under full throttle. Think the issue is laying with the ESC. I've got another I can try, but it's forwards only :-(.

[alfagta]

****! you aint having any good luck at all ,,i think its time you wrote to santa and asked for a brushless system with li-po and a new charger !

edit:

i didnt know that **** was considered a bad word , its in the English dictionary and is a perfectly reasonable and inoffensive word but hey, i am sorry i used the word **** and **** it i wont use it ever again on these boards ,

[TwistedxSlayer]

Been looking at a brushless combo on HK. It's the lipos and charger that are the massive expense. Could I still use the Nimh in brushless? Along with using Lipo?

[TwistedxSlayer]

I've misplaced the forward only ESC, I only had it the other night and not I've lost it, lol

[TwistedxSlayer]

Result!!! It's the RV11 that is at fault. Finally found the forward only ESC, swapped it out, and now it works perfectly, full throttle from standing and full throttle after part throttle.

[Percymon]

Great news - now you can get cycling those battery packs

[TwistedxSlayer]

That's this afternoons plan :-)

[alfagta]

Been looking at a brushless combo on HK. It's the lipos and charger that are the massive expense. Could I still use the Nimh in brushless? Along with using Lipo?

yes no problem , just set the low volt cut off to 2.7v per cell and you will be good to go , especially once your packs have been cycled through a few times , i wouldnt go much lower than a 10.5t though , just to save over working the nimh packs ,

have fun

[TwistedxSlayer]

Been looking at this combo...

https://www.hobbyking.com/hobbyking/store/%5F%5F25141%5F%5FTurnigy%5FTrackStar%5FWaterproof%5F1%5F10%5FBrushless%5FPower%5FSystem%5F4250KV%5F80A.html

[TwistedxSlayer]

Of course, the silly link hasn't worked :-(

[Percymon]

https://www.hobbyking.com/hobbyking/store/__25141__Turnigy_TrackStar_Waterproof_1_10_Brushless_Power_System_4250KV_80A.html

Its a non sensored set-up so you might experience a bit of cogging at low speed / light throttle starts but in its favour..

4 pole motor so should be quite torquey

waterproof

80A ESC good enough for touring cars and ligter buggies

The ESC BEC is a bit weak at 1A, but thats not unusual in budget systems (brushed or brushless) and you can overcome any servo issues with either the capacitors you already have or wiring in a separate BEC.

Yes you can run NiMH batteries with brushless, but NiMH technology cannot deliver instantaneous high current demand as well as lipo - your 4600mAh battery probably has enough reserve to cope, but the 3300mAh one might be at its limit.

[Percymon]

Your link was to the item at their international warehouse, so potnetially higher shipping fees and import duties to UK

This link is the same item from their UK warehouse..

https://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=42936

£3 more expensive but shipping should be lower and no import risks

[alfagta]

i havent used the turnigy esc you linked to but it looks good , the 4 pole motor is aimed more at short course and is rather power hungry , aim for around 3500kv for the motor and keep in mind that you will have to solder on a battery connector with esc's from HK ,

i use these https://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=64595 , and their 120a brothers , i have 4x 60a and one 120a and they have all been flawless , they are not waterproof sadly but , they can take a 13.5 motor and boost them up to 10.5 motor speeds ( i have run 8.5 on them but it was all too fast!!, they have good caps fitted that allows them to run even well hammered batteries , my old yeah racing 3200 li-po packs only manage 2200mah now and only give about 7.2 v for most of their discharge and the esc never stutters with a 10.5 and the boost and turbo turned up which equates to a rather quick system , plus you can grab one of these https://www.hobbyking.com/hobbyking/store/__56469__USB_Programming_Adapter_for_Hobbyking_X_Car_120A_60A_ESC_UK_Warehouse_.html , and tweak it to very slow and soft all the way to tyre removing grunt with your pc,

take your time and have a blast

[TwistedxSlayer]

Im ok with the soldering. Im using Deans connectors. At 17quid for the esc and 3 for the usb. Thats nowhere near as much as i thought it was going to be. Waterproof isnt important. I dont usually run it in the wet and when i do plastic bags work well.

[TwistedxSlayer]

Which motor would you suggest Alfa? Or anyone else? MUST be the same or quicker than ive got.

[alfagta]

i am using these among others , http://www.hobbyking.com/hobbyking/store/__45914__Turnigy_TrackStar_10_5T_Sensored_Brushless_Motor_3730KV_UK_Warehouse_.html , i have it in 17.5 , 13.5 , 10.5 and 7.5 , the 10.5 should be quick enough , keep in mind you can gear up a brushless system a bit more than you can a brushed system , if you go for an esc with boost and turbo they become quite scary , use in open spaces ! , with the 7.5 i actually ripped a brand new set of tamiya type A slicks from the rear wheels , i dont mean the glue gave up , the tyres literally ripped from the rims