Outboard builders have broken tradition to produce their own boats specially styled to go with a promising new type of propulsion unit (si.com)
Specifically, MacCready helped corporate clients devise creative solutions to hazardous - waste problems (Sludge can be as exciting as anything else, he declares) and for other clients came up with various vehicle designs intended to move efficiently through the air — or, in the case of a one - man scuba propulsion unit, the water. (discovermagazine.com)
ARTEMIS began taking data in 2003, after its ion propulsion unit boosted it from the incorrect orbit it had been placed in after it launched in 2001. (newscientist.com)