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Target Headspeed Calculator

Battery Pack:
Main Gear Teeth:
Motor Pinion:
Motor Kv:
Drag Co-Efficient:

 
Target Head Speed:


Pinion Gear Teeth Calculator

Battery Pack:
Main Gear Teeth:
Target Head Speed:
Motor Kv:
Drag Co-Efficient:

 
Pinion Gear Teeth:


Hurricane 550 Pinion Gearing Calculator

Spur (Main) Gear Teeth:
Pinion:
# of Cells:
Motor Kv:

 
Head Speed:
@ 100% Efficiency
Head Speed:
@ 95% Efficiency
95% Efficiency is about right for the Hurricane 550 transmission.
For the Stock motor run a 23T pinion.
For 1100Kv we recommend a 22T.
For 1400Kv we recommend a 18T.
 
 

Main Gear Reference

Align TREX 450 150
Align TREX 600 (Straight) 170
Align TREX 600 (Helical) 188
Mikado Logo 10/14 200/138
Thunder Tiger E-620 111
Hirobo Lepton 94
 
 
Note: Calculators are intended to provide estimates only. Some motor/esc combinations are more or less efficient. Final headspeed should always be checked with a optical or lcd tachometer. Ready Heli assumes no liability for the accuracy or inaccuracy of your calculations.
 
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