lipos

[saleens7]

well, ive been hearing news about the fate of the IB3600 cell and am now strongly considering lipo's as a power source for my SW36 build....

im a complete newb to lipo's, so i need all the help i can get...

my esc can only take up to 6 lipo cells....

im going to need to take two packs and combine them using a Y harness, will this work with lipo's? the total voltage of both packs will need to be close to 28.8v...i dont want to spend too much money (no more than 200$)

any suggestions?

[sjslhill]

Well

What is a SW36?

[saleens7]

Shockwave 36

[sjslhill]

Motor, controller, ESC, highest amps required?

[lferguson]

Steve, not to hi-jack the thread, but I have FMA DPM (lvc) units and I guess they work. My cells are always very balances going in and coming out. These units don't have startup tones or LED's so I guess they work but wouldn't know unless I ran my cells beyond what I know is a safe run. For these units to be efective you have to set the ESC to the lowest possible cutt-off or disable the LVC on the ESC.
The question is since thes cells are always very well balanced, should I not even worry with the FMA units and just rely on the ESC?

[sjslhill]

Sorry, I have no knowledge of FMA units.

[saleens7]

motor

Quantam 36-70 BL motor

http://www.unitedhobbies.com/UNITEDHOBBIES/store/comersus_viewItem.asp?idProduct=2036

esc:
Welgard 100amp no BEC

http://www.bphobbies.com/view.asp?id=A0780193&pid=B0558276

i dont know how to find the highest amos required, what do you mean?

i need to have around 28.8 volts....

i did some reaserch and found some polyquest 14.8v 4000mah packs for only 60$ each (ill buy two)

but if i wire them up to a Y harness, will they double the voltage and keep the same mah like nimh cells??

[saleens7]

what else will i need to run lipos? i think i might need a lipo balancer, but what else??

like i said, im a newb to lipos and have no expeirence...

[sjslhill]

Series = double the voltage
Parallel = double the current ablility and capacity.

Polyquest 14.8V 20C or what exactly? A Polyquest 4,000mh 20C can do not 80 amps in theory constant, however, we know from professional racers that this will not hold up for long if ran at 80 amps.

[saleens7]

polyquest 14.8 volt 4S lipo cells

its factory rating is 40 amps and the ideal rating is 34 amps...im still new to FE and dont get where amps would come into the equation....some elaborating may help...

[sjslhill]

Watts = Voltage x Amps(current) different motors with different props change the amps required. The knowledge should be out there for this motor and prop.

[saleens7]

if the esc is rated for 100 amps, will it try to pull 100apms from the lipo's?

im a little confused....will the setup im using work??(minus the motor, ive been hearing so much bad stuff about thw quantam that i think im going to use a feigao 14XL instead)....

[sjslhill]

The motor pulls the amps and the ESC will fail if pushed over 100 amps. I would say that you need 2, 20C 4000 packs in parallel to be safe, unless your ESC is over rated for your application.

[saleens7]

but will parallel give me double the voltage too?

[sjslhill]

Nope, paralle =double the current ability and capacity