NASA NTRS · 19850000388
Pulsed, Hydraulic Coal-Mining Machine
Abstract
In proposed coal-cutting machine, piston forces water through nozzle, expelling pulsed jet that cuts into coal face. Spring-loaded piston reciprocates at end of travel to refill water chamber. Machine a onecylinder, two-cycle, internal-combustion engine, fueled by gasoline, diesel fuel, or hydrogen. Fuel converted more directly into mechanical energy of water jet.
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Collins, Earl R., Jr.. 1986-01-01. Pulsed, Hydraulic Coal-Mining Machine. https://ntrs.nasa.gov/citations/19850000388
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