An evaluation was made of the cargo hook swing attachment for use on the H-21 and H-34 helicopters, to determine: (1) general characteristics of the system, (2) desirability of retrofit of the system on H-21 and H-34 helicopters, giving consideration to the total cost of a retrofit program, and (3) suitability of this type system for application to new helicopters, such as HU-1D and HC-1B. The improved external cargo sling system (Swing Hook) for the H-21 helicopter is a hinged, externally retractable metal yoke to which a swivel hook is attached. The improved external cargo sling system for the H-34 helicopter is an internally retractable, folding, double-axis cargo swing to which a swivel hook is attached. It was recommended that: (1) The Swing Hook be provided for retrofit purposes on H-21 helicopters, (2) No further consideration be given to the Vertol Swing Hook for the H-34 helicopter in its present configuration, (3) Investigation continue toward refinement of design for the H-34 installation, and (4) No consideration be given to the application of the Swing Hook to HU-1( ) helicopters. (Author)
Evaluation of the Improved External Cargo-Sling System (Vertol Swing Hook) on an H-21 and an H-34 Helicopter
1961
15 pages
Report
Keine Angabe
Englisch
Aircraft , Helicopters , Airborne , Cargo , Flight testing , Handling , Hoists , Hooks , Tests , H-47 aircraft , H-34 aircraft , H-1 aircraft , H-21 aircraft , HU-1D aircraft , HU-1B aircraft
Features of amphibious Vertol Model 44 Helicopter
Engineering Index Backfile | 1958
|Measurements on Vertol H-21 Helicopter
NTIS | 1968
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