quill shaft
quill shaft

ii. A form of torsional vibration damper used between the engine crankshaft and the propeller reduction gear.
iii. A slim driveshaft or driven shaft projected as a cantilever and terminating in a splined coupling inserted into the mating female portion. It is used to connect the fuel pump to the engine.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved