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Airsoft Calculators


Airsoft Joules Calculator

BB Weight
g
Muzzle Velocity
fps

Calculate Gear Ratio

Pinion Drive
Bevel Driven
Bevel Drive
Spur Driven
Spur Drive
Sector Driven

Hunterseeker5’s RPS Calculator

Battery's Nominal Voltage
volts
Motor TPA
Actual Gear Ratio
to 1
Motor

These calculators are provided as a courtesy, and should be fairly accurate.  If you find them to not be accurate, or find another cool airsoft calculator, please let us know.

The joules calculator is based on the standard equation of KE = ½mv²

The gear ratio calculator is based on the drive to driven ratios, then multiplied together.

The Huntseeker5 calculator is based on his formula ROF=(X*V)/(TPA*ratio).  The “upgraded motor” selection injects the higher value of x into the equation, while the “stock motor” selection injects the lower number.

Here’s more information direct from Hunterseeker5:

This is based on the assumption that the motor has neodymium magnets, unlimited power is available (powerful lipo, negligible voltage drop), and implicitly then that spring rating will not significantly affect ROF. It also assumes a rather efficiently built gun.

V= battery’s nominal voltage (assumed peak charge)

TPA= the number of winds on an armature of your neodymium magnet motor. If you don’t know the TPA of your motor, you can use ~14 for high speed, 16 for ACM “torque” motors, and ~22 for slow really high torque motors.

Ratio= your ACTUAL (not nominal, count yourself and remember it includes the pinion) gear ratio

ROF= Rate Of Fire

X= the constant 809.5135 (because I like them, so you and your sigfigs can go play with someone else) For a somewhat less efficient gun, or a lame buffer tube battery, or anything else like that, this constant can be reduced. Users in those cases may find 675 to be a more accurate value for X.

 

 

 

Tactical Parts
ExFog
6mmPlasticSM
VSF
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