lipo cut off

[darryl]

hi guys, just after a bit of advice please
ive just switched over to using lipos for the very first, the thing is im running a standard brushed speedo,an etronix probe plus 14t motor limit,with no lipo cut off, im also running a hpi 20 turn saturn, is it adviseable to get a lipo cut off switch
many thanks

[mattr]

Either get a cut off, or pop a timer on your Tx.
I only run (about) 10 minutes at a time anyway. As everything starts to cook. I need around 20 minutes to reach the (3.2v) cut off in my 2wd.

Brushed makes it a little less predictable........

Try running for 5/10/15/20 minutes and popping a multimeter across the pins to give you an idea of remaining power. That'll give you a handle on running time.

(And apparently you need a regulator to run that ESC with lipos, its only rated to 7.4v, not 8.4v.)

[darryl]

thanks mattr
ill only be running it at club level anyway for 5 min races, so it shouldnt be a prob as running 5000 mah lipos, what do you mean by a regulator as its only 7.4 volts, same as the lipos
thanks

[Col]

I wouldn't bother with a cut off... It's not like you're going to run it forever. We ran 20min on 4200mah lipo's with a 10.5 at the 24hrs, so yours should be good for at least 30min.
See you a week on sat?

[mattr]

thanks mattr
ill only be running it at club level anyway for 5 min races, so it shouldnt be a prob as running 5000 mah lipos, what do you mean by a regulator as its only 7.4 volts, same as the lipos
thanks7.4v is about what you'd get out of a 6 cell nicad or nimh. (Fully charged, approximately). A fully charged lipo puts out 8.4v.
It even says to use a regulator on the etronix page for the esc.