Castle 2650 Motor on 6s Lipo

[fastbaja5b]

..now we all know Castle is saying this motor is for 4s, no warranty on 6s etc etc (fair enough)

But...

Hpi Advertises using it on 6s!

http://www.hpiracing.com/kitinfo/103420/

Is the Flux Tork 2650 significantly different than the Castle motor to allow this???

That motor is the 2200kv, which is 6s capable

Cheers

[fastbaja5b]

Actually at the bottom is states "72mph, Flux 2650 kv 6s Lipo" Which is what I am actually referring too.

Sorry should have been clearer.

[simplechamp]

This has been gone over before when HPI did the same thing with 2650kv in the Vorza Flux buggy. It came down to them saying we don't recommend it, just saying it is possible.

Take it with a grain of salt, it's just the RC manufacturers marketing to customers (read: noobs) who walk into the hobbyshop and say "What's the fastest car/truck you have?"

[fastbaja5b]

But if it's advertised, legally it would 'imply' that it's within warranty specs (at least that's consistant with the Trade Practices Act in Australia, not sure on USA)

Looks like a typo in the add I would say

If the car comes with the 2200 motor as standard which is 6s capable, why would you need their option (2650) to run 6s ?

Perhaps the car actually comes with the 2650 and the option is supposed to be the 2200 ?

Cheers

[ZippyBasher]

Yes the 2650 can take 6s... My dad has been using 6s and 2650kv for a year or more on his LX-1E. But Longevity MAY not be there... I say MAY because he just shattered the magnet in it YESTERDAY over a full year running with 0 maintenance. BUT it may have overheated from a Binding issue (Drivetrain) and melted/tore the epoxy/kevlar wrap causing the motor to fail at ~58,000 rpm. So there is no definate answer from me. But I say if you dont mind spending the $25 spare rotor fee then have at it! Its a Blast!

Oh BTW his never even got close to overheating before the binding issue. Even on 6s it topped at 120~

[Chadworkz]

I think it all comes down to weight and wheel/tire setup...

A CC/Neu 2650kV motor will most likely handle 6s for a good while in a 1/8 buggy, because it is very light and has small, light wheels & tires.

Same motor in a 1/8 Truggy, or especially a 1/10 or 1/8 Monster Truck, and I bet it wouldn't last very long at all on 6s, because of the weight of the truck and the size & weight of the wheel & tire combo!

That is just my $0.02, though...

[fastbaja5b]

Ok cool, my intention is to put a 2650 in my RC8Be for speed runs on 5s Lipo (don't want to do 6s as it's a bit close to the caps rating when dealing with ripple voltage, I'd rather drop battery life a little and have more headroom for surges etc)

At the moment the car has a MMP and 2200kv motor on 4s Lipo and is great, however I don't think the MMP will handle either the 2200 or 2650kv on 5s Lipo hence the need to change ESC as well.

Obviously a 2650 in a MT on 5/6s is just asking for trouble IMO

[nuz69]

I don't see the interest to use the 2650Kv with 6S when you can use the 2200Kv with 6S... With a bigger pignon, the 2200Kv will provide the same speed at a better efficiency and with less amp spikes in the ESC and the battery....
What's the matter ? You can't find a pinion big enough to do the job with the 2200Kv ?

I don't see the interest to use the 2650Kv with 6S when you can use the 2200Kv with 6S... With a bigger pignon, the 2200Kv will provide the same speed at a better efficiency and with less amp spikes in the ESC and the battery....

Why do you say this? The 2200 should have a slightly higher efficiency at this range, run cooler, because it's bigger, but the 2200 should have the higher amp draw, when geared for the same speed. .

[snellemin]

The 2200 might draw about the same when geared for the same speed. It does spin at a lower rpm than the 2650 would on the same voltage. However the 2200 can pull a taller gearing for an even greater speed at the cost of more amperage.

In my testing between the 1410 and 1415, I found the 1415 would draw more amps for a given speed, plus the average amp draw was always higher. Running a bigger motor, that produces more torque, has to cost something. .

[snellemin]

It does cost something for sure. But you also have to take RPM and load into consideration.

..I forgot about motor timing as well. More timing, more amp draw.

I guess my bottom line is this. He said the 2200 would have smaller amp spikes, then the 2650, when they were the same speed. From my experience this is not true, I found the smaller higher KV motor to draw less amps, when geared for the same speed. .