Jeffrey Cole, Martin Piekarski, and Reid Almand

 

Original Materials

 

Project Summary: The group utilized a basic, yet effective crane design in order to accomplish the task of lifting the weight. The group made use of the stout, aluminum U-beam by positioning it as the first member of the crane's structure and attaching it to the aluminum plate base. The group decided to begin the crane's structure in this manner in order to avoid any minor deflections at the base, which would only be magnified at the end of the crane's arm. Next, the group utilized a small square truss arm in order to position the crane's arm properly to avoid the playing field obstacles and provide direct access to the weight. The main arm of the crane was initially comprised of a T-beam, but the weight proved to cause more torsion than was initially expected. The final structure of the crane's main arm was that of an I-beam. In order to provide the motor with more torque so that it might lift the weight more easily, the group added a small counterweight in the form of an aluminum U-beam. In order to reduce the deflection of the end of the crane's main arm, the group added a varied tensioning mechanism that is explained in more detail under the Special Features section of this website. A final design revision the group made was to reduce the size of the aluminum base plate in order to limit any excess deflection by moving the clamping mechanism as close to the base of the crane as possible. In the end, the group was able to lift the two pound weight two and a half inches off of the ground.