1 , A. Stroupe 2 , H. Aghazarian 3 , M. Garrett 4 , P. Younse 5 , and M. Powell 6 . 1 Jet Propulsion Laboratory, MS 198-219, 4800 Oak Grove Drive, Pasadena, CA 91109, [email protected]; 2 Jet Propulsion Laboratory, MS 198-219, 4800 Oak Grove Drive, Pasadena, CA 91109, [email protected]; 3 Jet Propulsion Laboratory, MS 198219, 4800 Oak Grove Drive, Pasadena, CA 91109, Hran...

John R. Brophy , Jet Propulsion Laboratory, Caltech Louis Friedman ,Executive Director Emeritus, The Planetary Society Nathan J. Strange, Jet Propulsion Laboratory, Caltech Thomas A. Prince . Director, Keck Institute for Space Studies, Caltech Damon Landau, Jet Propulsion Laboratory, Caltech Thomas Jones . Florida Institute for Human and Machine Cognition Russell Schweickart , B612 Foundation C...

Richard S. Gross (Jet Propulsion laboratory, California institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91 109; ph: 1-818-354-4010; fx: 1-818-393-6890; email: Richard [email protected]. gov) Yi Chao (Jet Propulsion Laboratory, California Institute of Teclmology, 4800 Oak Grove Drive, Pasadena, CA 91 109; ph: 1-818-354-8168; fx: 1-81 8-393-6720; email: [email protected]. gov) Steven L. ...

Evolutionary constraints which limit the forces produced during bell contractions of medusae affect the overall medusan morphospace such that jet propulsion is limited to only small medusae. Cubomedusae, which often possess large prolate bells and are thought to swim via jet propulsion, appear to violate the theoretical constraints which determine the medusan morphospace. To examine propulsion ...

Reasoning for Planning and Coordination Bradley J. Clement [email protected] Jet Propulsion Laboratory, Mail Stop: 126-347, Pasadena, CA 91109 USA Edmund H. Durfee [email protected] University of Michigan, EECS Department,Ann Arbor, MI 48109 USA Anthony C. Barrett [email protected] Jet Propulsion Laboratory, Mail Stop: 126-347, Pasadena, CA 91109 USA

A body immersed in a highly viscous fluid can locomote by drawing in and expelling fluid through pores at its surface. We consider this mechanism of jet propulsion without inertia in the case of spheroidal bodies and derive both the swimming velocity and the hydrodynamic efficiency. Elementary examples are presented and exact axisymmetric solutions for spherical, prolate spheroidal, and oblate ...