1S LiPo equivalent to 4 Cell NiMH

Post anything that does not fit into any of the other forums.
Post Reply
User avatar
Hail Ming
Expert Member
Expert Member
Posts: 237
Joined: Wed Nov 28, 2007 11:03 pm
Name: James Carroll
Car: MM & X2 Evo

1S LiPo equivalent to 4 Cell NiMH

Post 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 :wink:

What do you reckon?

James
Try 'Quick Silver', the Amazing Silver Can Powered Touring Car Class at HRCCC
User avatar
Gazza
Forum Fisherman
Posts: 277
Joined: Sun May 25, 2008 6:21 pm
Name: GAZZA
Car: Mardave V12
Location: Leicester
Contact:

Re: 1S LiPo equivalent to 4 Cell NiMH

Post by Gazza »

.
Last edited by Gazza on Mon Nov 16, 2009 12:11 am, edited 1 time in total.
JamesG
Senior Member
Senior Member
Posts: 111
Joined: Mon Feb 18, 2008 10:04 pm

Re: 1S LiPo equivalent to 4 Cell NiMH

Post 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.

Image
User avatar
Hail Ming
Expert Member
Expert Member
Posts: 237
Joined: Wed Nov 28, 2007 11:03 pm
Name: James Carroll
Car: MM & X2 Evo

Re: 1S LiPo equivalent to 4 Cell NiMH

Post 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...
Try 'Quick Silver', the Amazing Silver Can Powered Touring Car Class at HRCCC
JamesG
Senior Member
Senior Member
Posts: 111
Joined: Mon Feb 18, 2008 10:04 pm

Re: 1S LiPo equivalent to 4 Cell NiMH

Post by JamesG »

Ahh I follow now, these could be useful in making the move to the new cell technology then.
User avatar
Hail Ming
Expert Member
Expert Member
Posts: 237
Joined: Wed Nov 28, 2007 11:03 pm
Name: James Carroll
Car: MM & X2 Evo

Re: 1S LiPo equivalent to 4 Cell NiMH

Post by Hail Ming »

Exactly... :D

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.
Try 'Quick Silver', the Amazing Silver Can Powered Touring Car Class at HRCCC
Richie
Senior Member
Senior Member
Posts: 156
Joined: Mon Feb 12, 2007 6:11 pm
Name: Richard Wilson
Location: Bedworth

Re: 1S LiPo equivalent to 4 Cell NiMH

Post 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".
User avatar
Hail Ming
Expert Member
Expert Member
Posts: 237
Joined: Wed Nov 28, 2007 11:03 pm
Name: James Carroll
Car: MM & X2 Evo

Re: 1S LiPo equivalent to 4 Cell NiMH

Post by Hail Ming »

Hi Rich...

Yes I think that was Gazza... :wink:

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
Try 'Quick Silver', the Amazing Silver Can Powered Touring Car Class at HRCCC
User avatar
Gazza
Forum Fisherman
Posts: 277
Joined: Sun May 25, 2008 6:21 pm
Name: GAZZA
Car: Mardave V12
Location: Leicester
Contact:

Re: 1S LiPo equivalent to 4 Cell NiMH

Post by Gazza »

.
Last edited by Gazza on Mon Nov 16, 2009 12:12 am, edited 1 time in total.
Richie
Senior Member
Senior Member
Posts: 156
Joined: Mon Feb 12, 2007 6:11 pm
Name: Richard Wilson
Location: Bedworth

Re: 1S LiPo equivalent to 4 Cell NiMH

Post 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.
User avatar
Gazza
Forum Fisherman
Posts: 277
Joined: Sun May 25, 2008 6:21 pm
Name: GAZZA
Car: Mardave V12
Location: Leicester
Contact:

Re: 1S LiPo equivalent to 4 Cell NiMH

Post by Gazza »

.
Post Reply