Page 1 of 1
1S LiPo equivalent to 4 Cell NiMH
Posted: Wed Mar 11, 2009 10:49 pm
by Hail Ming
Just found this product on Novak's website...
http://www.shopatron.com/product/part_number=5474/135.0
due to be released later in March.
With the BRCA annoucement regarded approval of 1S LiPo from April 2009 (see link)
http://www.brca.org/BRCA/elecboard/news ... %20pdf.pdf
This might be what everyone currently running 4 cell NiMH has been waiting for
What do you reckon?
James
Re: 1S LiPo equivalent to 4 Cell NiMH
Posted: Thu Mar 12, 2009 12:15 am
by Gazza
.
Re: 1S LiPo equivalent to 4 Cell NiMH
Posted: Thu Mar 12, 2009 10:24 am
by JamesG
That is for boosting the voltage to your radio gear so that it's running at 6 volts, if you try running your esc and motor through it I doubt it would last very long, those wires are very small.
Re: 1S LiPo equivalent to 4 Cell NiMH
Posted: Thu Mar 12, 2009 7:43 pm
by Hail Ming
Hi James,
Yes I know...perhaps I should have made myself clearer. The issue with 1S LiPo is the voltage for running the electrics - this gizmo will solve it.
As for the voltage to the motor, that shouldn't be a problem provided the club allows lower turn motors.
For example:
A 5.5T brushless motor kicks out about 420W from a 7.2V pack - now if you recall your Physics lessons at school you'll know that power = voltage x current. For the purpose of this example let's ignore the variation of motor efficiency with voltage and assume the load on the motor is the same - therefore halving the voltage will also halve the power output.
That being the case...210W will be more than enough to run a V12 or 1/12th pan car.
Hence my post...
Re: 1S LiPo equivalent to 4 Cell NiMH
Posted: Thu Mar 12, 2009 8:50 pm
by JamesG
Ahh I follow now, these could be useful in making the move to the new cell technology then.
Re: 1S LiPo equivalent to 4 Cell NiMH
Posted: Thu Mar 12, 2009 8:57 pm
by Hail Ming
Exactly...
Finding decent 4 cell NiMH packs at a reasonable price is difficult...in comparison LiPos are readily available and cheap.
Just wondering what everyone else thinks...perhaps something for the autumn season.
Re: 1S LiPo equivalent to 4 Cell NiMH
Posted: Thu Mar 12, 2009 10:52 pm
by Richie
Hi James
If the justification is cost, why don't we just run a 2 cell lipo, these are commonly available, cheap to purchase, and we don't need a booster card.
we can then use existing motors, electrics, etc, etc. Didn't someone once say "lets keep this simple".
Re: 1S LiPo equivalent to 4 Cell NiMH
Posted: Thu Mar 12, 2009 11:03 pm
by Hail Ming
Hi Rich...
Yes I think that was Gazza...
Unfortunately I don't think 2S will fit in a pan car...but that might be the way forward for Mardave...certainly would be quick. I remember running the original mini stock outdoors at Coventry GEC Sports Ground with 7.2V packs...great fun.
James
Re: 1S LiPo equivalent to 4 Cell NiMH
Posted: Thu Mar 12, 2009 11:50 pm
by Gazza
.
Re: 1S LiPo equivalent to 4 Cell NiMH
Posted: Fri Mar 13, 2009 7:50 am
by Richie
OK the 7.2 1800 lipo's we tried at xmas were cheap and very good but wern't hard cased, we should stay well clear of these, however I did hear I think Bob Burr say that someone has done a hard cased 7.4 lipo for a Carisma. If we can find the size of these they may fit a mardave and that could be a way forward.
Re: 1S LiPo equivalent to 4 Cell NiMH
Posted: Sun Mar 15, 2009 10:44 pm
by Gazza
.