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those joints get real hot on my 3905. it's got to be from all the friction when they rotate.

Quote:

Originally Posted by MacII (Post 181639)

I think that's WAY overkill. I've got a CRT running 4s on a 2200kv and it's ballistically fast. Too much speed and power for the track - big track too. Can't imagine how unholy the speed of a 2700kv on 5s will be...you can't gear low enough...

You think so?

I didn't think it was fast enough on 4S & the runtime was way down to what I expected.

For example, I used the 3800 & only got 5.30mins out of it & the 6000 was only 11mins.
I want 5S so I can reduce the power draw with my Tx & increase runtime.

Here's our track, which has only just been finished to race on, but, by no means is the whole area finished.
Still need a drivers stand & it's been put on hold due to Federal Legislation stating that it needs to follow specific guidlines to meet disabled access requirements. So the guy's are working on a design to make it a cheap easy build.

http://rcmadhouse.com/MadForum/viewt...?p=22444#22444

Wow, serious track. I've only had my 1515/1y for one practice and one race weekend. That weekend on a very small and easy track it was drinking about 1800mAh from my 4900 packs to complete a 5 minute race. Not bad considering the motor I replaced was doing the same thing in 2600mAh plus it was WAY faster.

How are you gearing it? I've got mine pegged at 38.75/36.8 according to BG's speedcalc. On the track it feels much faster than the numbers sound. Even at Wolcott, which is a huge track (like yours) it was plenty fast with plenty of go to clear the biggest Quadruple jump I've ever hit.

That's a nice track you got there!!!!!

There are nitro guy's lapping at around the 45sec mark.

I'm running stock gearing on my CRT, so, whatever that is ratio wise(??). Basically 13/62-63. I can't remember the stock CRT gearing.

One of the guy's just made all the pics into a panoramic shot.

http://idisk.mac.com/jensrudnick-Pub...RRCC_Track.jpg

Quote:

Originally Posted by Mozzy (Post 182010)

Quote:

Originally Posted by MacII (Post 182041)

I have a Jammin CRT with a 1515 1/y that I run on 4s 8000mAh packs and have almost the same results as you. I geared it 14/62 and pulled 1700mAh in 5min. at the Barn.

Mozzy, I think something might be wrong with your setup if your using 3800mAh in 5.30min. And yes, I have more power than I could ever need at the track.

Bye:mdr:

I just wish I knew!

Should I change to a 14t pinion & see if it makes a diff?

Dammit! I want this thing to run longer than it did as a nitro. I'm sure I'll get there eventually.