A Study of the Precision Hover Capabilities of the Aerocrane Hybrid Heavy Lift Vehicle.
Abstract
An analytical study of the precision hover capabilities of the AEROCRANE, based on equations of motion verified by flight tests of a dynamic model, is described. Two methods of control (cyclic pitch and winglets) are examined. A real time simulation of the tasks of hovering a proposed large AEROCRANE in gusts and translating from point to point was conducted to evaluate the two control methods and to compare the AEROCRANE with proposed large helicopters. The stability and control characteristics of large AEROCRANES are compared with those of proposed large helicopters and the helicopter handling qualities specifications. The results of the study indicate that winglets provide a very effective means of hover control. With cyclic control, the precision hover capabilities of the AEROCRANE are similar to helicopters of equivalent gross weight. Extrapolation of helicopter handling qualities specifications to large gross weight characteristic of proposed large AEROCRANES indicates that the configurations studied can meet these specifications. Certain aspects of hovering control which are characteristic of any vehicle which derives an appreciable portion of its lift from buoyancy and carries a heavy sling load are examined. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1978
- Accession Number
- ADA054281
Entities
People
- H. C. Curtiss Jr.
- R. M. Mckillip Jr
- W. F. Putman
Organizations
- Princeton University