Analysis

Drop Impact Analysis

An analysis of a 7 lb vehicle dropped from a height of 2 ft was done to determine what components should be designed for. This analysis was done in expectation of a drop of similar height during competition.

Analyses are done to prepare for expected challenges during the Annual Central Washington University RC Baja Race. Statics and multiple free body diagrams will be created for the analysis of the various components to determine forces effecting the suspension and steering under different circumstances. Strength of materials will be used to figure stresses on different components of the vehicle and determine what materials would be best used and where.

Collision Impact Analysis

An analysis of a 7 lb vehicle colliding with a wall at 20 miles an hour was done to determine what components should be designed to withstand. this analysis was done in preparation of the vehicle potentially running into objects during competition.

Spring Analysis

An analysis of the springs to be used in tandem with the shocks designated for the RC vehicle for impact found in Analysis 1 was done. This analysis proves that the Traxxas 4957R springs will withstand the impact expected from Analysis 1.

Shock Tower Analysis

Analysis of the forces expected to affect the front shock tower was done. This analysis was done to find the force values and prove the material and design of the shock tower is appropriate.

Pin Diameter Analysis

An analysis was done to determine the minimum allowable pin diameter to use to connect the lower control arms in the front and rear of the vehicle.

Forces on Lower Control Arm Analysis

Forces expected to impact the lower control arms were analyzed for design decisions for the pieces. Thickness and length of arms were chosen as they were based upon the 19.4 lb and 116.6 lb forces calculated.

Lower Control Arm Thickness Analysis

This analysis was based on the results of the previous analysis shown to decide on a 13/16" thickness for the lower control arms.

Requirements

These analyses were done to design a RC Baja vehicle that meets the requirements that were set in the beginning of the project. The requirements are:

Must reach 20 mph as top speed.
One propulsion motor to power the vehicle.
One propulsion battery pack that is a 2S LiPo battery.
Three or more wheels that are not in a straight line or on tank treads.
The suspension arms must not deflect more than 0.3 of an inch when the Baja car is dropped from 2 feet.
Steering must weigh less than 1 pound
Turning angle for front tires must be at least 60 degrees
Suspension and steering must total to $250 dollars or less
Suspension must be able to support 7 pounds with a ride height of 2 inches
Baja car must be operated by a wireless controller with a minimum range of 40 feet
Must be able to withstand a drop of 3 feet with little to no lasting damage.