RASSOR Drum

grabcad

This is my entry for the NASA RASSOR Drum Challenge. The design utilizes two drums; one inner collecting drum and one outer 'drilling' drum, both expertly crafted to function in harmony. The drilling drum boasts an impressive twenty digging scoops, each positioned at a unique angle to maximize efficiency. A separate motor powers the inner drum, allowing it to seamlessly switch between collect mode and dispense mode with ease. To further demonstrate its capabilities, I have included two animations showcasing its operation. Each scoop features serrations designed to effectively break down large and hard regolith particles. Additionally, grooves are strategically positioned to securely attach the motor on one end. Key specifications of this design include a total drum diameter of 450 mm and a length of 360 mm. The length of each individual scoop measures 85 mm. While I was unable to calculate the total volume of the components using Fusion 360, the estimated total mass should not exceed 5 kg if made from Tennalum 7068, an aluminum alloy renowned for its strength-to-weight ratio. The inner drum has a total capacity of 32.426 liters or 32426.483 cubic centimeters. A fill ratio of 75% is achieved to ensure optimal performance and efficiency.