RCCrawler Forums

ROCKAPE · 08-20-2006, 01:02 AM

I have a NN chassis,with a Moped speed control and (2)hi-tec 645mg servos.Heres my problem,it doesnt seem to have enough steering power!!!If i switch to a 4 AA cell separate battery pack to power the electronics will it make enough difference??Or do I need to step up to some bling servos??Thanks!!

Mnster · 08-20-2006, 01:09 AM

Better servos would yield the greatest improvement. I know the Moped has a pretty good BEC output already. I'm not thinking a reciever pack would make a noticable change in the servo torque output.

cartronicshn · 08-21-2006, 05:29 PM

i bought a couple of 645 for my NN and they are way underpowered, definetly need better servos, i replaced them with some tower pro rated at 133 oz and definetly solved my problem.

Cake Eater · 08-21-2006, 08:26 PM

The Moped has a 5v 3amp BEC. So that means, with your 2 645 servos you are getting about 110oz/in(+/-) of torque, each. if you were to add a 4cell battery pack (alkalines, 6volts) then you'd get some better power of 133oz/in of torque. Or, if you don't want to keep changing batteries in the rx pack, you can get a 'Novak Nitro Servo Regulator' that will supply 6v at 3 amps to your servos.
645MG's are rated at 133.31oz/in at 6volts, and 106.93oz/in at 4.8volts.

08-20-2006, 01:02 AM	#1
ROCKAPE Pebble Pounder Join Date: Apr 2006 Location: Right near you.... Posts: 112	Need more steering power!!! I have a NN chassis,with a Moped speed control and (2)hi-tec 645mg servos.Heres my problem,it doesnt seem to have enough steering power!!!If i switch to a 4 AA cell separate battery pack to power the electronics will it make enough difference??Or do I need to step up to some bling servos??Thanks!!

08-20-2006, 01:09 AM	#2
Mnster MWRCA'er Join Date: Apr 2004 Location: Machesney Park IL Posts: 3,995	Better servos would yield the greatest improvement. I know the Moped has a pretty good BEC output already. I'm not thinking a reciever pack would make a noticable change in the servo torque output.

08-21-2006, 05:29 PM	#3
cartronicshn I wanna be Dave Join Date: May 2006 Location: HONDURAS...ROCK HEAVEN Posts: 5,076	i bought a couple of 645 for my NN and they are way underpowered, definetly need better servos, i replaced them with some tower pro rated at 133 oz and definetly solved my problem.

08-21-2006, 08:26 PM	#4
Cake Eater RCC Addict Join Date: Apr 2005 Location: Eden Prairie, MN Posts: 1,202	The Moped has a 5v 3amp BEC. So that means, with your 2 645 servos you are getting about 110oz/in(+/-) of torque, each. if you were to add a 4cell battery pack (alkalines, 6volts) then you'd get some better power of 133oz/in of torque. Or, if you don't want to keep changing batteries in the rx pack, you can get a 'Novak Nitro Servo Regulator' that will supply 6v at 3 amps to your servos. 645MG's are rated at 133.31oz/in at 6volts, and 106.93oz/in at 4.8volts.

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