R/C dark horse speed calculator

[Quartermaster]

I just did it and the calculator said my Wraith well do 51 mph. Now that is with a full 3s charge and a 100% power level on the motor. Its fast but i don't know if its that fast. What do you think. I have a Tekin Pro 4 3300kv motor, 14/56 spur and 13/38 diff gears and 5.5 inch tall tires. If you spin the wheels the drive shaft goes around about 3 times to one on the tires so that would be a final of 3 to 1 gear ratio.

 

[thzero]

I just did it and the calculator said my Wraith well do 51 mph. Now that is with a full 3s charge and a 100% power level on the motor. Its fast but i don't know if its that fast. What do you think. I have a Tekin Pro 4 3300kv motor, 14/56 spur and 13/38 diff gears and 5.5 inch tall tires. If you spin the wheels the drive shaft goes around about 3 times to one on the tires so that would be a final of 3 to 1 gear ratio.

From Script Asylum's calculator (

)... so no, not even close to 51mph.

The combination of the gearbox and the front/rear diff brings down the gear ratio a lot (good for crawling).

Differential Ratio: 2.923076923076923
Transmission Ratio: 2.6
Other Ratio: 1
Spur Tooth Count: 56
Pinion Tooth Count: 14
Total Voltage: 11.10
Motor KV: 3300
Tire Diameter (inches): 5.5
Tire Ballooning (inches): 0
Motor Current Draw: 0
Motor Coil Resistance: 0
Spur/Pinion Ratio: 4 : 1
Total Ratio: 30.4 : 1
Tire Circumference (inches): 17.28 inches (438.88 mm)
Rollout: 0.57:1
Total Motor Speed: 36630 RPM
Vehicle Speed: 19.72 mph (31.67 km/h)
Effective KV Value: 3300
KT constant: 0.41 oz-in/A

 

[Quartermaster]

No its not even close to crawling speed even just above nothing its to fast to crawl with. I have a SCX10 with a 35t hand wound motor on 3s and its a lot faster than that one. Its closer to a 17t with 3s and 20 pinon and 78 spur gear that i had on the SCx10