Lumenier RB2205C-12 2400KV SKITZO Ceramic Bearing Motor
Thread Tools
Old Jul 17, 2011, 01:55 PM
eCalc is offline
Find More Posts by eCalc
get your drive right...!
FAQ

eCalc: Q&A for propCalc, fanCalc, heliCalc, xcopterCalc


Hello,

To be able to support you best, please alwaly post a screen shot of your calulation..


Did you read something about eCalc in your prefered RC Magazine? ...please send us a scan of the article. Thanks


Thank you for supporting eCalc - the most reliable RC Calculator on the Web.


Kind Regards
Markus

info@ecalc.ch
Last edited by eCalc; Jun 06, 2015 at 02:52 PM.
Sign up now
to remove ads between posts
Old Jul 18, 2011, 08:43 PM
jes1111 is offline
Find More Posts by jes1111
Registered User
Hi Markus, and thanks for this great tool.

- coaxial arrangements are so common - are you working on an extension to make proper calculations for these?
- the battery table lists A123 cells (26650, 2.3Ah) as 15/20C. My info says that (genuine) A123 26650's are 30C rated.
Old Jul 19, 2011, 08:19 AM
eCalc is offline
Find More Posts by eCalc
get your drive right...!
@jes1111
...as mentioned some month ago - too complex for the time.... sorry
Old Jul 19, 2011, 09:42 AM
jes1111 is offline
Find More Posts by jes1111
Registered User
Yes, I recall - but are you intending to upgrade the tool in the future?

And the A123 C rating?
Old Jul 19, 2011, 11:50 AM
eCalc is offline
Find More Posts by eCalc
get your drive right...!
@jes1111

I'll check that....

I got an idea about coax-Multi-Copter. Do you have some figuers on your's?

I need your setup, flying weight, current to hover, max. current....

cheers markus
Old Jul 19, 2011, 12:03 PM
jes1111 is offline
Find More Posts by jes1111
Registered User
I don't have one flying yet (which is one reason I'd like to see coax added to your tool ).

I agree it is very complex. You obviously understand more about this than I do, but my guess is that if you calculate the pitch speed of the top prop (at hover rpm) then apply that to the calculations for the bottom prop you should be in the right ballpark. There will be some inaccuracy for anything but "continuous hover in still air" since the craft will be varying rpm constantly to manoeuvre, but since it will be both sides (+/-) of the hover rpm it should average out.
Old Jul 19, 2011, 05:28 PM
eCalc is offline
Find More Posts by eCalc
get your drive right...!
thanks!
will update this in the next days.....

cheers markus
Old Jul 21, 2011, 07:24 AM
eCalc is offline
Find More Posts by eCalc
get your drive right...!
the A123-30C are available

cheers Markus
Old Jul 22, 2011, 08:51 AM
B12 is offline
B12
Find More Posts by B12
B12
Registered User
I have used the ecalc quite a lot for my projects and it has been much more accurate than expected. For example with Turnigy 3648-850kv and Aeronaut Cam Carbon props the static current is within couple of amps. Nice online tool indeed.
Old Jul 22, 2011, 11:31 AM
snoopy_schulz is offline
Find More Posts by snoopy_schulz
Registered User
snoopy_schulz's Avatar
Hi eCalc

I have tested your propCalc versus my own drive calculator. The results are very similar.

http://snoopy-schulz.square7.ch/

My question is, do you have source's for prop data from internet. I'm using prop data from aeronout and from http://www.elektromodellflug.de/oldpage/datenbank.htm.

Best regards
Micha
Old Jul 22, 2011, 01:57 PM
Ron van Sommeren is offline
Find More Posts by Ron van Sommeren
homo ludens modellisticus
Ron van Sommeren's Avatar
Micha, Markus,

Check the Aeronaut, APC and Slowflyprops tabs in
www.torcman.de/konfiguration/konfigurator_e.htm
oder
www.torcman.de/konfiguration/konfigurator.htm


Prettig weekend Ron
diy motor tipsDrive Calculator
diy motor groupCumulus MFC
RCG Plus Member
Last edited by Ron van Sommeren; Jul 22, 2011 at 02:04 PM.
Old Nov 07, 2011, 12:32 PM
eCalc is offline
Find More Posts by eCalc
get your drive right...!

eCalc - Release 5.15


Hi,

with immediate effect the new release 5.15 is available.

What's new? ...please see the relase note: http://www.ecalc.ch/#release

cheers markus
Old Nov 09, 2011, 11:47 PM
mnavarro is online now
Find More Posts by mnavarro
Registered User
Markus,

You have a great tool and provide the rc group a great service. I will donate a little something on my next visit.

I have a wuestion that might be a little silly but perhaps you can indulge me. A fully charged lipo is at 4.2 but ecalc shows the full voltage to be only 3.7. Why is this? Won't real world results be much different because of this?

Thanks!
Old Nov 13, 2011, 02:33 PM
eCalc is offline
Find More Posts by eCalc
get your drive right...!
Hi,

3.7V is the rated voltage. if you have a look on a dicharge diagramm at high C rate you will see your Lipo is not able to maintain the 4.2V (due internal resistant). it will drop with amp draw towards your rated voltage....

a typical discharge diagram: http://www.elektromodellflug.de/imag...b_p055_1_1.gif

cheers markus


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
ECALC info for Jeti Brushless ?? jmelzer Electric Plane Talk 2 Sep 07, 2014 04:20 AM
FAQ eCalc: Questions & Answers for propCalc, fanCalc, heliCalc eCalc Power Systems 3 Oct 26, 2010 01:45 AM
Discussion Propcalc question Wulf_Flieger Power Systems 7 Nov 17, 2008 01:34 PM
eCalc Values for Airtronics Elcipse? hmpecker Power Systems 1 May 01, 2001 08:50 PM
ecalc values for eclipse? hmpecker Electric Plane Talk 0 May 01, 2001 08:08 PM