GEAR RATIO
SPEED CHART
SPUR GEAR
12
60
5:1
GEAR RATIO x 2.6 = FDR
Final Drive Ratio (Pinion/Wheel)
EXAMPLE:
4.57 x 2.6 = 11.88:1 FDR
Note: All speeds are based on calculations. Actual speeds may vary depending
on conditions.
Using the formula below you can estimate your setup speed.
4.6:1
4.2:1
4:1
5.16:1
4.76:1
4.42:1
4.13:1
5.33:1
4.92:1
4.57:1
4.26:1
NO LOAD
62
64
13
14
15
P
I
N
I
O
N
MOTOR
BATTERY
ESTIMATED
SPEED
PINION/
SPUR
NO LOAD
RPM
FireBall 370
4000kv Brushless
6000kv Brushless
8000kv Brushless
6 Cell
2S LiPO
2S LiPO
2S LiPO
30,000
33,600
50,400
67,200
15/64
13/60
14/60
15/60
44.3k/h / 27.5mph
46.0k/h / 28.57mph
75.6k/h / 46.9mph
105.8k/h / 65.7mph
Find these values first:
Rear Tire Roll Out = 273mm
KV x Voltage = RPM (No Load RPM)
Pin/Spur Ratio x 2.6 = FDR
Follow this sequence:
RPM ÷ FDR = Wheel RPM (WRPM)
WRPM x Rear Tire Roll Out = mm/min
mm/min ÷ 1000 = Meters per min (m/min)
m/min x 60 minutes = Meters/hour (m/hr)
m/hr ÷ 1000 = Kilometers per hour (k/h)
k/h x 0.621 = Miles Per Hour (mph)
Formulas to Calculate Estimated Speed (use in sequence):
Subtract 20% from the estimated speed for a more realistic speed prediction.
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Содержание GPV-1 RTR
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