Formulas? - RC Groups
Jul 01, 2002, 02:22 PM
Registered User

# Formulas?

Hey,

I'm putting together a little form-based windows calculator to make easy use of common/useful formulas.

So, post your common/useful formulas here and I'll put it in (i'll give you credit if you wish, of course).

It'll mainly focus on e-flight, but similar to ezone, it'll also contain useful stuff on other areas of model flight.

Thanks
 Jul 01, 2002, 02:29 PM Hmm, kerosene... :) Don't have the formula handy at the moment, but something to calculate the CG would be nice... here's a link : http://www.palosrc.com/instructors/cg.htm And maybe the standard Power/Current/Voltage/Resistance thingie? (fill in two of the above, and calculate the other two or something similar) It's just ohms law, but hey, I'm lazy Hans
 Jul 01, 2002, 02:31 PM Registered User oh, V=IR is in there, dont you worry (im lazy too)
 Jul 01, 2002, 10:16 PM Registered User CG formulas will also be going in there. As well as a basic design param calculator.
 Jul 01, 2002, 10:33 PM Will work for planes canard cg would be nice. tired of doing the math. http://www.palosrc.com/instructors/putte.PDF
Jul 02, 2002, 10:40 AM
Registered User
GregT,
I have included a CG calc. program.
Dick Huang

### Files

 Jul 02, 2002, 11:00 AM Registered User Yeah, mine wont be console based so it'll be much easier to use (i hope). I'm doing this because I always find myself looking for formulas, and because im bored
Jul 02, 2002, 11:33 AM
Registered User

# Fast electric boat calculator

Here is a simple Excel spread sheet that I put together to calculate stuff for fast electric boats. If you click on the answer boxes you can see the formulas. Most of the calculations are also relevant to E.flight.

http://ann-neil.supanet.com/calculator.xls

Neil
 Jul 02, 2002, 12:05 PM Registered User I've got a question on your current draw equation you use: 3.6/time * mah = current draw i would use: Ah = current draw X total time Whats the 3.6 for? Am i missing something?
 Jul 02, 2002, 12:29 PM Registered User The 3.6 is a conversion factor. 3600 seconds/hour divided 1000 milliAmps/Amp gives 3.6, and cancels out the milliAmp-hour units of the battery capacity. The "time" is in seconds, so that cancels out too. All you're left with is Amps.
 Jul 02, 2002, 01:16 PM Registered User ahh, yeah- guess i was thinking base units.
 Jul 02, 2002, 03:12 PM Registered User I am glad mkirsh1 worked that one out first. I was having trouble remembering how I arrived at 3.6. Neil
Jul 03, 2002, 01:18 PM
Registered User
Greg
Got some more formulas for you.