Electric Motor and Propeller Thrust calculator

Issue Warnings

Battery
Cell Type
 # Cells in serie
 # Series in parallel
Cell Capacity
mAh		 Cell Resistance
Ohm		 Cell Weight
gram
Volts per cell
V		 Pack Voltage
V		 Pack Weight
gram

Electronic Speed Controller
Speed Controller Resistance
Ohm

Motor( s )
Motor
 # Motors
Kv
rpm/V		 Idle Current ( Io )
A		 Rm
Ohm
Kt
Ncm/A		 Recommended Max Current
A		 Weight
gram

Max Motor Efficiency in given configuration
Max Eff
%		 Current to Motor @ Max Eff
A		 Volts to motor @ Max Eff
V
Watts out pr. motor @ Max Eff
W		 RPM @ Max Eff
rpm		 Idle RPM ( No )
rpm

Gearbox / Prop
Gear Ratio
 Gear Efficiency
%
Prop Type
 Absorbed Pow. Const.
 Thrust Const.
Prop Diameter
inches		 Prop Pitch
inches		 Prop Blades

Result for Motor( s ) with Gearbox and Prop ( at Speed = 0 )
Motor RPM
rpm		 Motor current
A		 Volts to motor
V
Motor Watts In
W		 Motor Watts Out
W		 Motor Efficiency
%
Full-throttle duration
minutes		 Approx Power System Weight
gram. Batteries + Motor( s ) + 10%

Propeller Results ( pr. Prop )
Very coarse aproximation used, do not belive too much in it !
Only use results to get an idea of how parameters affect thrust and power.
Throttle setting
%		 Zero Thrust V/nD
J		 User given Relative J value
%
Copyright ( C ) 2000, 2001 Chuck Gadd. All rights reserved.
Copyright ( C ) 2007, 2008 Leif Nielsen. All rights reserved.
See HTML Source for full and complete copyright notice.

Battery and Motor data was obtained from Motocalc and used with permission.
For more information on Motocalc, please visit www.motocalc.com