One requirement is that our RC car must turn at a radius of less than 3 feet. For this requirement this directly relates to the control arms. The control arms help the car have traction so the wheels can be steered. When designing the control arms there were many parameters that had to be calculated with specific conditions. The length of the control arms directly impacts the length of the axial and turnbuckles. After finding the length of the control arms, the thickness was found next that would be able to withstand the force of a 2 foot drop. Since the design for the chassis plate was first, it made it possible to find the weight and find the amount of force the suspension will have to support which can be found in appendix____. After a two foot drop the suspension needs to support 157 newton pounds. When determining the thickness of the control arms this is necessary to find the thickness. This calculation used max stress and a section equation to find the thickness. Using the same technique to determine how much force the control arms need to support when the RC hits a wall at top speed. My calculations can be found in appendix____. To withstand a force of 82 newton’s the control arms need to have a thickness of 270 nanometers and a max of 5 millimeters. After calculating the dimensions of the control arm, a calculation was necessary to find the angle the control arms need to attach to the frame. Using geometrical calculations, the angle has to be at least 17 degrees. From a different mathematical approach, the turning radius was found which can be found in appendix_____. Using the length of the axial and the smaller length of the servo connecting rod my calculations were able to find that our car will have a turning radius of 2.9 feet which is in the 3 foot parameters.
