BL Runtime Setup?

[Rannick]

Hi, I'm pretty new to RC Monster-Trucks. As my freind buyed hisself a Revo, I was very impressed and so I was thinking about to buy a Revo on my own. Only Problem I don't like Nitro cause over here in Germany u arent allowed to drive a nitro outside a official race-track.
So i thought about a electric version of the Revo. Then I saw The BL Revoxx from Dafni and was very impressed.
Now that i want to build one BL Revo on my own after Dafnis example, i have a question refering the runtime of a Bl setup.

What is the best BL setup to get a great runtime with the Revo. I thought about a Lehner Basic 3100 or 4200. Has somebody some experience what runtimes are achievable?

[Dafni]

Hi Rannick:D Good to hear, mate!

As I told you, I'm not an expert when it comes to different BL setups. But I can give you something to read about the Lehners:
http://www.rc-monster.com/forum/show...p?threadid=537

I'm sure Mike, Serum and the others will give their opinions as well.
This is the right place to get some good advice and excellent service.

Another information you should provide is the number of cells you want to use.
I choose 14 on my Revoxx because I already had a couple packs, and they fit just perfect in my design.

[Rannick]

Thx for the fast Reply Dafni! :D

I want to use 14 cells even if i m not pretty shure about it. is there more runtime with more cells ore only more power.
It would be great if somebody can write some detailed information to the runtime of different setups.
BL compared to normal motors or twin motors.
lets say i have 14 cells GP3300 Akkus:
then i put different Motors on my truck what would change with the runtime.
For example:
-Lehner basic 3100
-Lehner Basic 4200
-Lehner XL 2400
-550er twin Motor (e-maxx setup)

with what of this motors i would archieve the greatest runtime.

I read on http://www.rc-monster.com/brushlessmotors.php That the lehner basic 3100 provides long runtimes. That sounds good :) :P

[Dafni]

How about the Novak HV?

Or maybe a Feigao XL? Can you run an XL on 14 cells at all?

Our 'merican friends will get back on this. :) I'm interested on this, too.

[Nick]

HV Maxx would give long run times, but it would be slow pushing a Revo?

[Rannick]

hmm what means slow pushing.
And how long is a long runtime.
I m pretty new to this so pls be lenient with me :p
I dont want to drive to extrem with my revo but long.
So Runtime is more important for me at the moment even if I dont want a motor that is to slow, that only allows me to drive with the speed of a slug.
A good compromise between Power and Runtime, but with a little bigger eye on the runtime!

[Nick]

HV isn't very fast (to the point around, 35mph). Although it will give you the runtimes you need. It all depends on the gearing and weight also and not to forget the batteries.

[Rannick]

35mph is far enough even 30 mph would be enough.
As batterie packs i would use 3300 or 3700mAh with 12 or 14 cells.
Offers the HV a better runtime then the Lehner Basic 3100?
and if I use the HV engine what runtime I will archieve circa(15-20min)?

[Nick]

Well with stock Twin Titans I get 15 minutes with a good set of GP3300s (@ 3500mAh). I think the HV would draw more power, so your looking maybe 10 minutes most with 3700s - but I don't have one and really can't be sure.

As I said it also depends on the gearing and weight of your truck.

[Rannick]

Hmm only ten minutes is a bit low. cause i would have to buy at least 6 batterie packs to drive a half houre. And then all this reloading. Isn't theire any possibility to reach higher runtimes. Maybee with other motors.
and whats up with the gearing how have i to set up the gearing?
I wanted to archieve runtimes around 20min.

hope there is any possibility :)

I'm gone for a while now. Going to look soccer (Germany vs Australia)with some friends. so cu tomorrow!

[Serum]

You will get a 12-15 minute runtime on BL with the GP3300's

You won't go flat out the whole time.

Enjoy the game!

[Nick]

Originally posted by Serum
You will get a 12-15 minute runtime on BL with the GP3300's

You won't go flat out the whole time.

Enjoy the game!

Is this the HV?

Any other brushless motor on 14 cells I would expect alot less.

[Serum]

No, i easy managed this runtime with my heavy savage and 16 GP3300's with a plettenberg bigmaxximum. so i guess the 9L would do about the same on 14 cells.

[Rannick]

I just heared in another forum long days ago...
that a guy with two 550er twin motors, with a runtime of 10-15 minutes, ask how he can increase his runtime.
They said go BL. But now it sounds that BL decreases the runtime more then increase, i'm confused :C:

So for a good runtime would it be better to drive one BL or two normal motors?

I mean the degree of efficient should be very high on BL Motors, so i thought when u use a BL motor that contributes circa the same power like the normal twin motors(stock e-Maxx), it would increase the runtime.

[Dafni]

I'm interested in this too, and I'll keep an eye on this.

This much I learned: The trouble is, BL needs more voltage, and delivers more power, so the advantage in runtime is not that much. I might be wrong, though.