24 cell setup help.

[SerpentKing101]

now that stage 1 is finally complete of my little project, its time to move on.

Below are potential means to finally get it moving. i have zero experience with any of these, but thy have the paper numbers im looking for, and hope that someone whose used some can help me choose, or make a suggestion with something else.

MOTOR:
BK 7XL
Hacker B50 10L
Hacker B40 12L
Lehner Basic XL1600
Lehner Basic XL200
Lehner 1940/7
Lehner 1930/10

SPEED CONTROL:
BK 36120
Com Pro TMM 8032-3S Expert
Hacker Master 135-0-FSB
Schulze Future 24.89

this is all going into a 4wd touring car with only speed in mind. Im going to have the means to pay for all of it in a few months if need be, so price really isnt an object, but I dont see a need to go overkill either.

[VWVR6]

Just because the speed control can handle 24 cells doesn't mean that the motor can. You might wanna look into that.

[tcolesen]

VWVR6 is right. None of those motors could handle 24 cells for long unless you cut the endpoint adjustment to 60% (but then it would be like dragging around 10 extra cells).

It looks like the 2nd and 3rd controllers (possible 4th) are for airplanes. These can work (if you use a mechanical brake), but for high speed I wouldn't trust them.

The motor you choose depends somewhat on the cells you are going to use. If you use GP3300 or better, then you can get a larger motor that will have more torque, which will produce more speed. High RPMs aren't exactly ideal, as they can kill a motor. But larger, torque-ier motors can be geared up with the only problem being motor heat (from inefficiency).
I looked at the specs for some Lehner motors (because they are REALLY nice if you can afford them), and checked out the 1950 motors. The 1950 8turn should work well with 24 cells. It has a kv of 1586, and would be a POWERHOUSE. The BK 36120 (car version) would be quite a match for this motor.

[OptimaMan]

The 24.89 is fine. I have one of those and it works up to 8s lipos for me in my emaxx. That's 29.6 volts!!! With 24 cells, we're talking over 2000 watts! For max speed run, I'd take a motor in the 1500 kV range or so. With that much power, you'll be around 100 mph actually in a 4wd TC. Maybe even faster. The 1940 I believe will give you the greatest output of those motors you've listed. I've got a TC4 that I was going to do some major speed runs with. 24.89, Basic XL 1600, and 8s lipo... but I don't have to space to run it!

[aqualato1]

A lehner 1940/7 on 24 cells will be pushing it to over 60,000 RPM which is over the motor limit which is 50,000. The lowest I would go is the 1940/9. At 28.8V (1.2 a cell) a 1940/9 will be at ~50169 RPM which is pushing the motor.

If you want the specs on the lehners here's a website that sells and gives there specs: http://finedesignrc.com/lehnerspecs.htm
I would stick in the 1500 RPM's / Volt range.

[SerpentKing101]

i did my math by assuming all the motors would be around 60K rpm unloaded. (about 2080 rpm/V). but i did read that the Hackers could go up to 65K? But for now, I guess its safe to say that the 24.89 would be a good controller.

ill keep looking for another motor, and i'll put it on my list, but im hoping for a lehner/schulze combo.

[aqualato1]

Try a lehner 1940/10.

The only problem with them is a 50K Rpm limit, but that's on the 1940 series, the 1930 series, and most of the other series's so if you want a lehner with a 65K RPM limit look at the Lehner basic XL series.