The Hamburg Ship Model Basin

Driving excellence for the maritime future

Video 100 years

Commercial Rim-drive Propulsion (CRDP) tests

The CRDP concept (Electric Boat Company / General Dynamics) comprises a ducted, multiple blade row propulsor with a permanent magnet(PM) radial field motor rotor mounted on the tips of he propulsor rotor blades and the motor strator mounted within the duct of the propulsor. Open water test configuration. An extensive series of model scale hydrodynamic performance tests were conducted on a small scale model of the CRDP at the HSVA.

The main advantages of a rim-drive design are

  • High efficiency
  • Higher torque
  • Reduced flow distortion
  • Good cavitation performance
  • Compact overall size
  • Light weight