RC Car Chassis 3D model with 2-speed gearbox, front, rear and center differentials for 3D printing

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3D model of a Radio-controlled car chassis with a 2-speed gearbox, front, rear and center differentials in 1/18 scale for 3D printing. Suspension operation, steering mechanism operation, demonstration of the operation of the gear shift mechanism of the gearbox. X-ray view of the chassis and working mechanisms. The chassis is called RRS-18.

CHASSIS FEATURES:
- Scale - 1/18
- 2 Speed Gearbox
- Four wheel drive
- Central, front and rear differentials with ability lockable
- Independent front and rear suspension (IFS, IRS)
- Correct Ackermann angle, adjustable Caster, Camber and Toe-in
- Large suspension articulation
- High ground clearance
- Extensive customization options

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When using a 370 class motor with 15000 rpm with 45 mm wheels, for 1/18 scale models, 1st gear has a maximum speed of 2 km/h, 2nd gear has a maximum speed of 18.4 km/h. This allows for a dynamic ride (for 1/18 scale) in 2nd gear and a very smooth and controlled ride in 1st gear, which is essential for RC Crawlers.

1st gear - gear ratio - 77
2nd gear - gear ratio - 8.55

All-wheel drive system of RRS-18 3d printed RC car has center differential between the front and rear axles to compensate for the different wheel speeds between the axles from different cornering radius. This prevents torsional stresses in the drive train and automatically distributes the driving forces, increasing directional stability and making your driving more effective and controllable. Center differential provides the ability to rotate the wheels of the front and rear axles at different speeds while maintaining an inextricable flow of torque.

When cornering, the right and left, as well as the front and rear wheels of the car travel a different distance and, accordingly, make a different number of revolutions and have different rotation speeds. This leads to wheel slippage, loss of grip and, accordingly, to a decrease in controllability and premature wear, and the stresses in the transmission also increase significantly, which can lead to its failure. The use of differentials allows you to solve this problem and smoothly distribute torque to all drive wheels.