2650kv in rc8

[Joe Ford]

Originally Posted by SpEEdyBL

I run mine on 5s as well w/o problems and its the same rpm as the 2200 on 6s. Change the voltage limit of the 2650 to 5s. That would make more sense - unless there is something you are not telling us (why a 1515 size motor would handle more rpm)???

Guys this is NOT GOING TO BE DEBATED. FOLLOW THE RULES OR PAY WHEN YOU BREAK IT...PERIOD! WE ARE NOT GOING TO CHANGE OUR RATINGS SO YOU BETTER DECIDE WHETHER YOU WANT TO PAY IF SOMETHING HAPPENS OR NOT!!!

READ PATRICKS POST...IF THAT ISN'T CLEAR ENOUGH YOU'VE GOT BIGGER PROBLEMS...

Speedy...you need to re-read post #39...NOWHERE in there did I say that 5s on a 2650 is over 60k. I said that on 6s at anything over 22.64v under load it would be over 60k. You also need to re-read the part about the wattage handling ability of the shorter motor being less than that of the longer can motor, and how this can cause motor failures IF THE PERSON DOESN'T KNOW WHAT THEY'RE DOING. We want people to succeed...if they follow what we say they will. If you guys want to experiment that's your prerogative, but expect to pay for it if you break it...again read Patrick's post!

[SpEEdyBL]

Originally Posted by Joe Ford

Speedy...you need to re-read post #39...NOWHERE in there did I say that 5s on a 2650 is over 60k. I said that on 6s at anything over 22.64v under load it would be over 60k. You also need to re-read the part about the wattage handling ability of the shorter motor being less than that of the longer can motor, and how this can cause motor failures IF THE PERSON DOESN'T KNOW WHAT THEY'RE DOING. We want people to succeed...if they follow what we say they will. If you guys want to experiment that's your prerogative, but expect to pay for it if you break it...again read Patrick's post!

I was not refering to anything stated in any other post nor was I referring to anything to do with a warranty. I mentioned my setup ONLY because 5s is still higher than the rated maximum voltage according to the website, but yields roughly the same fraction of power as the motor size ratio between the 2650 and 2200. In fact I remember another previous post from patrick which stated the 2650 is a 1,000 watt motor and the 2200 is a 1250 watt motor. That makes sense because the 2650 internals are about 4/5 the length of the 2200, and 5/6 is not that far off. So if the 2200 is advertised as 6s capable, it makes sense that the 2650 could be advertised for 5s, given the same amp draw for both motors (according to the website, both motors are rated for 120 amps anyways). The fact that it is not rated for up to 5s, requires a more detailed explaination - more than rpm and size differences.

If it is true that the 2650 found from testing can easily run into problems on 5s, more so than the 2200 on 6s, THEN the 2650's 4s rating would make sense, but not from a 100% theoretical engineering perspective alone.

P.S. Even though I told you to change the the limit to 5s, I do not rule earth so you don't have to listen to me. But if you do decide to change the limit, I guess I will have to re-read those posts in order to return the favor!