Hpr 135 cog

[Francois Coulloudon]

Most likely the limiting factor power-wise will be the esc's not the cells as long as they are strong, what esc's are you going to run?...motors?

I was assuming you were using 5000ma packs which is why I was mentioning about the weight, of course those smaller packs will fit no problem. Just in case you don't know, the C-rating will of course double when you parallel but because your packs are half the capacity of a 5000ma pack you will still only get the same discharge rating as a typical 60C 5000ma pack in 1P. In other words; Your packs (2600ma 60C = 2.6x60=156amps in 2P=312amps) comparing to a 1P Revo 5000ma 70C (5x70=350amps). The only way you are going to allow for more safe amp draw is by using larger cells or just stick to high quality cells in 1P but 5000's, like Roy said above, I agree, no need for 2P but maybe you already have those cells in which case use them of course but a nice set of 70C Revo's (or comparable quality cells) will get you the best speeds with your setup. Hope that wasn't confusing.

Twin : http://www.offshoreelectrics.com/pro...d=hef-HBF1300L
The problem is that having this setup split the current over twice the amount of conductor reducing the stress/resistance for current.
I'm quite sure total weight is not too far from twin 5000mAh. Also, I have more flexibility in weight distribution.

Thanks. Will stick to my plan, but can try other setups later.

Cheers,

Francois

[Lone-Wolf]

By all means stick to your plan, I'm looking forward to hearing how she runs! Keep us updated.

[Lone-Wolf]

It's come to my attention that I gave some slightly incorrect info when referring to proper CG with a hull like this, just want to get this out there before Francois starts gluing anything! Anyways, an observation I made since installing the quite heavy Flier 400 esc's into my hull is that the CG seems too far back compared to when the much lighter MGM's where installed, bow noticeably lifting under full power with Flier's. I measured the CG as mentioned above from the transom overhang of the hull, I should have measured from where the drives meet the transom!! Some time ago Keith B mentioned this to me and faded away in my mind...but you guys don't miss anything! So that being said, I am moving my heavy esc's forward to the point where the hull is at 40% CG. I'm certain this is where the hull will be best suited to top speeds but will update with results after I next run, maybe today. Of course this is just what works for my hull, installing Lipo sled's will be a great help in fine tuning CG.

Updates to come shortly. Sorry about that Francois!