ROAR approves LiPo

[Cooper]

Originally Posted by frogger

With brushless motors - can't you can limit the kv rating of the motor as apposed to the overall voltage for the same effect?

why?

[mobile chicane]

anyone got any links to hard case saddle pack lipos?

I only need stick formation atm but I suspect I may get a b44 for my birthday

[David Church]

Originally Posted by bbq

I am realy intrested what cells EFRA will havfor us this year

So are we, and also what the BRCA will approve????

[JCJC]

Originally Posted by mobile chicane

anyone got any links to hard case saddle pack lipos?

I only need stick formation atm but I suspect I may get a b44 for my birthday

Think they are still at the development stage Giles, think some drivers are testing in the UK

[frogger]

Originally Posted by Cooper

why?

I'm not sure of all the reasons why some classes went down to 5 cell nimhs but one reason is that it limits the speed of the cars to keep things safe.

With brushless motors the kv rating refers to 1000RPM/Volt so where you have a 6800kv motor powered by a 7.4v lipo battery it works out to be 6800x7.4v=50320rpm.

Novak motors:
3.5 - 10,300 RPM/volt
4.5 - 8,200 RPM/volt
5.5 - 6,800 RPM/volt
6.5 - 5,900 RPM/volt
7.5 - 5,400 RPM/volt

So if you want to limit speed (as in the case of some 5 cell classes then all you have to do is limit the kv motor they can use (the exact same way that some classes limit the turns on brushed motors) but still allow them to use 7.4v lipo's.

[frogger]

Originally Posted by mobile chicane

anyone got any links to hard case saddle pack lipos?

I only need stick formation atm but I suspect I may get a b44 for my birthday

http://www.maxamps.com/products.php?cat=54

[OldTimer]

Originally Posted by frogger

http://www.maxamps.com/products.php?cat=54

Don't seem to be hard cased

[mark christopher]

Originally Posted by frogger

http://www.maxamps.com/products.php?cat=54

Originally Posted by OldTimer

Don't seem to be hard cased

there not so wont ever be brca legal

[peetbee]

Originally Posted by mark christopher

there not so wont ever be brca legal

There is a drop down that lets you select a hard plastic skin for $4.99 extra. That may be ok?

[sly]

Originally Posted by mark christopher

there not so wont ever be brca legal

If you scoll down the page a bit more at the 4000/6000mah packs the come with a build in skin.
i have emailed them and the answer was quote "It is the same strength as the 3200 orion case but we offer it either shrunk into the pack or as a detachable “skin” that can be removed."
it adds 1or2 mm to the overall size.
sly

[mark christopher]

ok the hard case ones would be ok

[frogger]

Yep, the gents above are correct. Maxamps do a hard case that is shrunk onto the packs (with a removable version). Also, they are no bigger than 3 cells so should fit any saddle pack config. I've been using Maxamps packs for ages and they are absolutely superb batteries with phenominal service. Highly recommended.

I wish more info was available on the Trackpower hard cased saddle packs but I've seen nothing yet.

[BentM]

At last EFRA meeting, lipo was discussed at the electric meeting. If my information from that meeting is correct, someone will make a proposal to the next EFRA meeting. Remember; the federations has to forward the proposals to EFRA before the end of August. So, just start the work :-) Then it can be approved for use from 2009. As some said earlier, EFRA do not make the rules, the members does! And the member are the drivers, through their federations.

[OldTimer]

Originally Posted by peetbee

There is a drop down that lets you select a hard plastic skin for $4.99 extra. That may be ok?

Yep your right missed that lol.

[bbq]

Originally Posted by David Church

So are we, and also what the BRCA will approve????

I just hope that the swedish federation dont make there own list.

[David Church]

Originally Posted by bbq

I just hope that the swedish federation dont make there own list.

Why is that??? They may approve Lipo's straight away?!?!?!?!?!?!?
We are very lucky to have Paul Worsley, he does so much for the sport that people never even know about He is the guy that checks every detail........

[mark christopher]

Originally Posted by frogger

Yep, the gents above are correct. Maxamps do a hard case that is shrunk onto the packs (with a removable version). Also, they are no bigger than 3 cells so should fit any saddle pack config. I've been using Maxamps packs for ages and they are absolutely superb batteries with phenominal service. Highly recommended.

I wish more info was available on the Trackpower hard cased saddle packs but I've seen nothing yet.

we are still testing them and case sizes

[c0sie]

SMC have just released a LiPo too..

SMC have announced that they are releasing 2 new hardcase LiPo packs with a true 28C rate. Offering a 4000mAh and a 5000mAh pack, the 4000 pack will be thinner so it will fit in any car where a sub-c pack fits, while the 5000 pack will be thicker and will require some modifications to fit in some of the more popular sedan cars. The packs come with 12 gauge silicone wire and Deans plug to handle high current applications and have been submitted to ROAR for approval.

[Mutant]

Could the A123 li-Fe offer an alternative to 5 cell nimh?

Are there any thoughts to also alowing this battery technology for racing? (it is supposed to be even safer than hardcased lipo).

[ultima]

Originally Posted by Mutant

Could the A123 li-Fe offer an alternative to 5 cell nimh?

Are there any thoughts to also alowing this battery technology for racing? (it is supposed to be even safer than hardcased lipo).

They won't allow it unfortunately. I'm a bit shocked actually after re-entering the RC world after nearly 20 years. I thought this field would be awash with the latest technologies, but no.
Brushless - Yes!, but not those evil delta-wound castle creations motors!
Lipo - Yes!, but not those darned durable and safe a123s'!