RPM for 2200 with 6s

[SpeedAssault]

Originally Posted by What's_nitro?

Well I used the 8:1 final ratio to calculate those figures. That 15:1 final ratio will give you EXACTLY the range of speed you want on 6s (44+).

how did you get that? I have used brians speed calculator and made a huge Spur/Pinion guide for ratio and speeds.
49/11, but have not seen a Mod1 11 tooth ratio would be 14.7 36mph.

I'd like to know I could do 60mph without overheating.Any idea what ranges work without dangerous temps ?

Is 49/14 11.5:1 54mph ok ?

[What's_nitro?]

Originally Posted by SpeedAssault

how did you get that?

First, I assumed a 4.5" tire diameter based on the picture. Then I assumed a WOT loaded voltage of 3.5vC (21V).

21V*2200kV=46200rpm.

46200/8=5775rpm (at wheels).

5775*60=346500rph (revs per hour).

4.5"*3.14159=14.137155" (tire rollout, inches).

14.137155"*346500=4898524.2075inh (inches per hour).

4898524.2075inh/12=408210.350625fth (feet per hour).

408210.350625fth/5280ftm (feet per mile) = (drum roll) 77.31256640625mph.

Did you get all that? Pop-quiz tomorrow......

[SpeedAssault]

Originally Posted by lincpimp

Not sure, 50 mph gearing with the 2200 and 6s will be fine with the weight of vehicle you have with the sizr tires you plan to run. I am sure you could gear up to 60 or so without heat issues, although your lipo may get worked harder. Best to start with gearing for mid 40s and check temps. If you feel that is too slow gear up a few mph and then recheck temps... I have tons of pinions so that is my method...

Yea, that would be the tru only way to know I guess. maybe the hobby hop will allow me to return some pinions.

Originally Posted by What's_nitro?

First, I assumed a 4.5" tire diameter based on the picture. Then I assumed a WOT loaded voltage of 3.5vC (21V).

21V*2200kV=46200rpm.

46200/8=5775rpm (at wheels).

5775*60=346500rph (revs per hour).

4.5"*3.14159=14.137155" (tire rollout, inches).

14.137155"*346500=4898524.2075inh (inches per hour).

4898524.2075inh/12=408210.350625fth (feet per hour).

408210.350625fth/5280ftm (feet per mile) = (drum roll) 77.31256640625mph.

Did you get all that? Pop-quiz tomorrow......

Nitro, WOw, I'd like to learn how that is done, like how do you get loaded voltage
and how is this done without a ratio ?
Maybe it would work in the right conditions and only did one or two passes before things got to hot.
Why divide by 8? " 46200/8=5775rpm"

Very cool math