Lesson 5 Technical Information

Lesson 5:

Starting and stopping smoothly

  1. Tire spin
  2. Traction
  3. Driving surface
  4. Skidding to a stop

Positioning of SxS in turns

  1. Apex turns
    1. High/outside approach
    2. Low point ofturn
    3. Exit high/outside
    4. Potential obstacles
    5. Availability of trail space
  2. Rear-wheel cheat
    1. Inside tracking of rear tires
    2. Increases with increased steering input
    3. Potential of impact at apex

"Rear wheel cheat" is a term used to describe the phenomenon where the rear wheels of a vehicle, particularly utility terrain vehicles (UTVs) or offroad vehicles, do not follow the exact path of the front wheels when the vehicle is turning. Instead, they cut inside the path of the front wheels. This can be particularly important to understand in offroading scenarios where precise maneuvering is required.

Descriptive Explanation

  1. Understanding the Basics:
    • When a vehicle makes a turn, the front wheels trace out a certain curved path.
    • The rear wheels, however, tend to cut a shorter path on the inside of the curve.
  1. Dynamics Involved:

    • This occurs because the rear wheels are fixed and do not pivot like the front wheels.
    • The pivot point of the vehicle's rotation is closer to the front axle, causing the rear wheels to follow a different arc.
  2. Impact on Offroading:

    • When navigating tight trails or obstacles, drivers need to account for the fact that the rear wheels will not follow directly in the tracks of the front wheels.
    • This can affect the vehicle's ability to clear obstacles or avoid

Driver input and suspension

  1. Acceleration
    1. Rearward weight transfer
    2. Loss of traction in front tires
    3. Potentially diminished steering
  2. Deceleration
    1. Forward weight transfer
    2. Lifting of rear tires
  3. Turning
    1. Lateral weight transfer
    2. High center of gravity
    3. Compounded with additional weight

Steering

  1. Shuffle (push-pull) steering
  2. Hand-over-hand steering
  3. Lock-arm steering
  4. Positioning of hands