Advantage of running 5 cells

[delanobe]

The title says it all

At our club a lot of guys are running 5 cells instead of 6 with a 5.5, 4.5 or 3.5 brushless and are very quick!

What are the advantages or negatives of this combo?

Less weight is a big + but what else??

Thanks

[Southwell]

Less voltage is the main advantage, it helps on tracks with low grip.
In 4wd most people run 5.5's and in 2wd 6.5's. 4.5 and 3.5 are way too fast for most tracks.

[delanobe]

Just did the calculation compared with 6 cells.

If you use 5 cells with a 4.5 it has a bit more watts than a 5.5 with 6 cells and 70gr less weight. Only good things?

Am I missing something negative with the 5 cells??

[josh_smaxx]

Are you allowed to run 5 cells in BRCA events?

If yes then i cant see any negative with running them.

[notlawnomis]

Duration, depending on the track of course??

[tc2k]

Actually, I heard somewhere that less cells mean less current draw so longer duration

[delanobe]

For the Belgian / Netherland championship it's allowed.

Isn't it allowed in the UK or for the European championship??

Thanks

[delanobe]

I "think" the duration is exactly the same cause it's still 4200mah.

The only difference is that we are not running on 7.2V but on 6V. This "should be compensated by running a 4.5 instead of a 5.5.

[Kopite]

Has anyone tried 5 cells and a 4.5 in off road?

[Chequered Flag Racing]

Originally Posted by josh_smaxx

Are you allowed to run 5 cells in BRCA events?

not for 12th scale that's 4 cell only

but as this is forum is 1/10th Off-Road based, the BRCA section rules say,

25. BATTERIES
25.1 Cars will be driven by a maximum of six
rechargeable cells, which cannot be replaced
after a race has started.

25.2

The description, specification and types of

rechargeable batteries approved for use in Off-
Road Sanctioned events can be found in the
section entitled ‘BRCA Electric Board’ (EB).
25.3

Cells can only be used if they are included

on the BRCA (EB) homologation list at the time
of the event.
25.4

Entrants must be prepared to open packs

on demand of the race Scrutineer to demonstrate

the eligibility of the rechargeable batteries.

[DaveG28]

This has me intrigued, as someone running a 4wd thats nearly 200g over the weight limit!

So a 5 cell will have same duration but less speed, which can be got round by having a faster motor (which will lower duration again!)? Does anyone know how that balance ends up, eg net win or loss!?

On a techy note, how do the chargers cope with 5 cells, does the voltage change throw them out of whack? ie I have an orion advantage charger!?

Dave

[dancoog]

can anyone fill me in on this?
5 cell brushless, smaller wires?
seems a lot of new things were tried at the worlds.
any feedback on things to come or what works?