GT2 v GT3

[NiMo]

Got to WLRC this Sunday with my GT3 spec car.
There was 2x GT3 cars (7.4v LiPo and Saturn 20T) and 1x GT2 car (4-cell and 10.5).
turns out at that track that the GT2 is only slightly faster than the GT3 cars in a straight line.

Will be looking to test a GT2 with a 3.7v LiPo shortly.

[PDW]

Way to go Nigel! I think the 3.7v LiPo is a good option in these GT10 cars, as they all build to weight easily. That means fitting a receiver pack is not only easy, but also not a hindrance. The voltage doublers will be the way to go once we get the Novak ones over here.

Let us know how you get on!

[Dozey83]

on question,

where are you getting the 3.7V lipo from?

i cant find any anywhere! :(

[MikeS]

TrakPower 4800 saddle packs = 2 x 3.7v 4800Mah packs ;)

[Dozey83]

thought so, but wasnt totally sure! :)

are these 3.7V packs going to be the next big thing in GT and 12th racing??

one benefit i supose is that as its only 1 cell you dont need to balance charge!??

[bs6ef]

Mike what are the dimensions of the packs?

[MikeS]

Here you go.........

[Dozey83]

i am slightly confused by this, the size thing, as in the EB 2009 rules, rule 3.4 statesFor 3.7v Packs: The maximum case sizes allowed are as follows :-
Length: 93.0 mm
Width: 47.0 mm
Height: 20.0 mm

so does that mean that you cannot use any of the 7.4 saddle packs as they all seem to be around the 30.00mm high mark??

[MikeS]

That's because the BRCA 1S list is for a 4 cell NiMH sized pack equivalent LiPo ;)

[Dozey83]

ok, so what are people supposed to be using in the GT cars??

or have they not decided yet as there are no national series yet???

doesnt really concern me, i am just wondering! :)

[MikeS]

PDW would probably better to comment on this.

[bs6ef]

Thanks mike, that a shame they are 30mm in height just abit to big to fit in my 12th car.

SMC make a 3.7v pack for 12th cars.

[Plasmag]

Hello all of you looking at running lipo in your 1/12 cars FYI the trackpower 3200ma 3.7v sadlle pack lipo measure 70mm long/46mm wide/20mm high
also new intellect 4200ma 3.7v saddle pack measure 67mm long/45mm wide/22mm high.

I have used the Trackpower 3200ma single cell with a 6v rec pack and an Orion 6.5 motor on a large track ok in my S120 no problem with duration.

Even better using both lipos 7.4v with a 13.5 motor.

[NiMo]

Here is the info on the Demon saddle cells from Nick, the ones that I will be using:


Demon DS4235 LiPo 7.4V 4200mAh 35C 4mm sockets

BRCA Legal

Hard cased with 4mm sockets(Corally style).

Supplied with a charge balance lead. (Balance lead has a Tamiya style connector fitted which can be changed to allow charging and balancing)

Size (Each saddle): 23 x 46 x 68.5mm

Weight (Each saddle): 131gm

Rated at 35C Amps: 133amps continuous

Low resistance at only 3.5 mohms