NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Collections About News Help Login
Back to Results
Hybrid LTA vehicle controllability as affected by buoyancy ratioThe zero and low speed controllability of heavy lift airships under various wind conditions as affected by the buoyancy ratio are investigated. A series of three hybrid LTA vehicls were examined, each having a dynamic thrust system comprised of four H-34 helicopters, but with buoyant envelopes of different volumes (and hence buoyancies), and with varying percentage of helium inflation and varying useful loads (hence gross weights). Buoyancy ratio, B, was thus examined varying from approximately 0.44 to 1.39. For values of B greater than 1.0, the dynamic thrusters must supply negative thrust (i.e. downward).
Document ID
19830003829
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Meyers, D. N. (Piasecki Aircraft Corp. Philadelphia, PA, United States)
Kubicki, P. (Piasecki Aircraft Corp. Philadelphia, PA, United States)
Tarczynski, T. (Piasecki Aircraft Corp. Philadelphia, PA, United States)
Fairbanks, A. (Piasecki Aircraft Corp. Philadelphia, PA, United States)
Piasecki, F. N. (Piasecki Aircraft Corp. Philadelphia, PA, United States)
Date Acquired
September 4, 2013
Publication Date
October 1, 1979
Subject Category
Aircraft Stability And Control
Report/Patent Number
NASA-CR-152344
PIAC-97-C-6
NAS 1.26:152344
Accession Number
83N12099
Funding Number(s)
CONTRACT_GRANT: NAS2-101085
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

Related Records

There are no records associated with this record.
No Preview Available