Results 1 to 3 of 3
  1. #1
    RC Competitor
    Join Date
    Jul 2008
    Location
    Greenacres, FL
    Posts
    72

    Speed/Gearing calculation

    What is the formula to use when trying to calculate top speed if you know the gearing variables for the x-maxx?

  2. #2
    RC Qualifier
    Join Date
    Nov 2015
    Posts
    296

  3. #3
    RC Qualifier NBViper's Avatar
    Join Date
    Feb 2013
    Location
    MA
    Posts
    386
    Here are the values for Stock:

    Differential Ratio: 3
    Transmission Ratio: 2.54
    Other Ratio: 1
    Spur Tooth Count: 54
    Pinion Tooth Count: 15
    Total Voltage: 25.20
    Motor KV: 1600
    Tire Diameter (inches): 8
    Tire Ballooning (inches): 0
    Motor Current Draw: 0
    Motor Coil Resistance: 0
    Spur/Pinion Ratio: 3.6 : 1
    Total Ratio: 27.432 : 1
    Tire Circumference (inches): 25.13 inches (638.37 mm)
    Rollout: 0.92:1
    Total Motor Speed: 40320 RPM
    Vehicle Speed: 34.98 mph (56.19 km/h)
    Effective KV Value: 1600
    Last edited by NBViper; 12-23-2015 at 03:57 PM.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •