REQUIREMENTS 

 The device will conform to the following requirements and be optimized for performance, cost, and size:

• Be able to compete in a sprint and off-road race

• The drivetrain is required that would weigh less than 1 pound

• The drivetrain must fit in the available space on the chassis plate

• Accept 19740 RPM from electric motor

• Transmit  HP to the rear axle

• Take rotary motion in one axis to a perpendicular axis

• The drivetrain must have a gear reduction to allow the vehicle to drive at 20 MPH

• The total cost of the drivetrain must be less than $200 not including electronic components

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ANALYSIS

To get the R/C car to drive smoothly an analysis is done to determine a turn ratio for a constant speed. To get this turn ratio, a double gear reduction is used and calculated for the separate ratios. When a ratio is calculated that works for two gears, a corrected speed can be calculated. Also using these ratios, gear parameters can be found. Next an analysis can be done to calculate torque in the shafts using power and angular velocity. Using those torque values, the forces on the shafts and bearings can be determined. To find design parameters for the shafts, an analysis can be done to determine a minimum diameter when designing with a specific material. With these shafts, a key width and depth can be chosen to determine the minimum length and stresses of the key. Finally, an analysis is done to determine the distance and angle between the two offset shafts.