Speed Calculator - Page 14 - RC-Monster Forums

coolhandcountry · 11.17.2006, 09:35 PM

Well I know you put alot in to it brian. I feel you deserved it as well.
Congrats on a stickie.

BrianG · 11.24.2006, 11:35 PM

Thanks CHC!

I added another page for BEC wiring and info. It even has diagrams. :) I figure the question gets asked enough to warrant its own page...

R/C Calculations

Serum · 11.25.2006, 04:37 AM

Brilliant Brian!

Great addition!!

11.25.2006, 05:43 AM

Brian, RC Calculations is an awesome work. Congratulations!

Some spanish dudes are asking me to translate it.
Do you think is a good idea?

BrianG · 11.25.2006, 03:57 PM

Thanks all!

I don't see why translating it should be a big deal. Although, the Google web translator would work well in a pinch...

BrianG · 11.27.2006, 12:29 AM

Another small update to the BEC & Wiring page. Added fan hookup option and a couple other small things...

BrianG · 12.02.2006, 12:58 AM

Added option for more fans to the BEC & Wiring page...

MetalMan · 12.02.2006, 01:19 AM

Pretty cool!

BrianG · 12.05.2006, 11:59 PM

Added the dimensions for the various motors where applicable on the Miscellaneous Data page...

MetalMan · 12.06.2006, 12:19 AM

It just keeps getting better and better :027:.

BrianG · 12.06.2006, 12:25 AM

Thanks MM!

If you see something that is incorrect or missing, please let me know. I grabbed what I could from the LMT, BK-Electronics, Castle, and Neu websites, so things might have changed since they published their values.

phildogg · 12.14.2006, 07:55 PM

hey when using the calculator and coming up with voltage for li-po would it be 3.7 or 4.2v per cell? thanx
phil

coolhandcountry · 12.15.2006, 05:43 PM

Quote:

Originally Posted by phildogg

hey when using the calculator and coming up with voltage for li-po would it be 3.7 or 4.2v per cell? thanx
phil

I try to base it on the type of cells and sytem. I ussually use 3.7 myself.
Not saying it is totally accurate. But then again. It gets you in a close
guesstimate.

BrianG · 12.15.2006, 10:50 PM

What I usually do is get a best-case speed and a worst-case speed.

To get the best-case speed, I use 4.2v/cell for the lipo and the maximum ballooning I think would be possible. Also, if I know it, I also use the unloaded motor kv value.

To get the worst-case speed, I use 3.3v/cell for lipo and no ballooning. Again, if known, I use the loaded motor kv value.

Either case will be wrong, but you know your speed has to be somewhere in the middle, probably a little towards the best-case side.

Sylvester · 12.14.2006, 08:03 PM

3.7V. It wont be @4.2 since your going WOT when trying to get up to top speed.