reversible-pitch propeller

reversible-pitch propeller

[ri′vər·sə·bəl ¦pich prə′pel·ər]
(mechanical engineering)
A type of controllable-pitch propeller; of either controllable or constant speed, it has provisions for reducing the pitch to and beyond the zero value, to the negative pitch range.
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On gas-turbine ships, there are four major types of casualties that could impact flight operations: main engine, reduction gear/ shafting, control reversible-pitch propeller and electrical.
Another engine
30 OCT 1919 Reversible-pitch propeller demonstrated.
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