Mechanical design of a contra-rotating propeller assembly for a small underwater ROV

Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2006.Includes bibliographical references (leaf 29).A project was undertaken to design and build a contra-rotating propeller assembly for a small underwater remotely operated vehicle (ROV), with the intent of commissioning a production run at a later time. The desired production rate was greater than one assembly per seven hour day with one machinist, at a material cost of less than $600 per assembly. Lastly, the design had to be compatible with the propeller design work being done concurrently by J. Stanway. The specified goals were met. The material cost of each assembly was $496.02 at the time of manufacture. In the production run, the incremental time for making each assembly was under 5 hours, giving a large margin for overhead and work interruptions.by Thaddeus Stefanov-Wagner.S.B