Fluid reaction surfaces (i.e. – impellers) – Plural impellers having relative movement or independent... – Coaxial rotation
Patent
1997-11-29
1999-09-21
Ryznic, John E.
Fluid reaction surfaces (i.e., impellers)
Plural impellers having relative movement or independent...
Coaxial rotation
416129, 416157B, 416170R, B63H 510, B64C 1148, A47C 774
Patent
active
059544791
ABSTRACT:
A twin engine, coaxial, dual-propeller propulsion system employing a unique transmission having two independent drive trains. The first of the two engines exclusively drives a first drive train, which in turn rotates a forward multi-bladed propeller assembly. The second engine exclusively drives a second drive train, which in turn rotates an aft multi-bladed propeller assembly. Thus, the propellers of this propulsion system, even though coaxial, are driven by separate engines. The propulsion system also enjoys the increased propulsive efficiency of a coaxial dual-propeller design as the first drive train rotates the forward propeller assembly in a first rotational direction and the second drive train rotates the aft propeller assembly in the opposite direction. Further, the propulsion system employs pitch change control mechanisms which independently control the respective pitch of the blades of the two propeller assemblies. Specifically, a first pitch change controller exclusively controls the pitch of the blades of the forward propeller assembly and a second pitch change controller exclusively controls the pitch of the blades of the aft propeller assembly.
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Ventura Modifications Corporation, Centerline Twin-Pac, Business Plan, Prior to Dec. 16, 1995, 46 pages.
Lyon Richard T.
Ryznic John E.
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