Dualsky Motors calculator (DC) version 3.14 (freeware)
Download from here (post #1):
http://www.rcgroups.com/forums/showthread.php?t=1078160

Install :
After downloading the zip file ..
Just unzip in any folder.

Contents :
VB6 executable  Dualsky_Calc_v314.exe 
One Dualsky.ini (modified at each pgrm use) to save the preferences and default parameters
To recover the original Dualsky.ini , please Download again from the original source
One Dualsky_C_Readmefirst.txt (this document)

Running :
Simply run the .exe program
remark : it is MANDATORY to keep Dualsky_Calc_v314.exe AND Dualsky.ini in the SAME FOLDER

Mandatory Microsoft Visual Basic 6 library: MSVBVM60.dll (1353 kb) version 6.00.9802
For open/save functions you need Microsoft files for Common Dialog box
Generally the following files are already on the PC
Comdlg32.ocx and Comdlg32.dll (usually in C:\\Windows\System32\ )
If not, you have to download (free) from the web (Google search for Comdlg32).

Uninstall :
There are no key in the Windows register nothing into the operating system.
Just kill manually Dualsky_Calc_v314.exe
You are free to keep or not the .txt or .mmc ASCII documents

Compatibility :
There is no warranty that the .mmc files will be compatible with future versions of the freeware

Screen resolution:
Best image with 1280x800 pixels; second choice 1024x768

Graphs :
Principal graph is showing the efficiency versus the current all at WOT (Wide Open Throttle)
Blue curve = motor efficiency without the effect of temperature rising (zero running time)
Red curve = motor efficiency with the influence of temperature rising (depends of current)
Magenta curve = Speed rpm ratio relatively to no current (virtually idle) situation

Algorithms :
The author is permanently optimizing the empirical formulas and the coefficients to try
to get results as close as possible to the last real world testings.

Anyway the performances are uncertain, particularly concerning the temperature rising.
The algorithm tries to compute the temperature at the copper wire level.
The air flow could get down this figure. It depends of the installation in the plane.

Remark concerning the propeller simulation.
The pitch and the power-static thrust coefficients are uncertain.
So the results concerning the absorbed current(absorbed power), static thrust and pitch speed are approximative.
If you have yourself some test-results, you can use "generic mode" and change the Abbott and thrust coefficients,
in order to get a good fit.
The library presents 291 propellers.
Brands : Aeronaut, Align, APC, Graupner, GWS, Mejzlik and some others.
A static thrust and power prop calculator is available via the main menu 'propellers'.
There is no calculation for in-flight performances.
Generally the thrust is going down when the plane speed / air increases and also the consumed power.
As a result of this "unloading" the motor-rpm is slightly going up.

The author accepts to receive propeller samples to test and add on the freeware.

About the author
This freeware was written by Louis Fourdan, who was born in 1939.
Louis is living in Antony, south suburbs of Paris, France. Married, 3 children, 7 grand children.
He graduated with a degree in electrical engineering from Supelec (France) in 1961.
He was an international radar expert (Thomson CSF) with a broad technical spectrum,
from antenna arrays to digital signal processing (DSP) and radar projects.
Louis retired in 1997 and wrote a lot of software for hobbyists using the VB6 platform.
He is knowledgeable about brushless motors for the RC world and particularly keen about solar-powered RC cars.
Louis is the founder-moderator of "Solar-RC-Cars" Yahoo group.
French friends call him "Solar Grampa".
Since 2009 Louis is involved in Eco Marathon mileage electric prototypes with Paris West University (EcoCar)
Another one of his hobbies includes Carambole billiards. 
