Aerodynamic Analysis of a 1/20-Scale Powered Wind Tunnel Model of an Airship with Two Wake Propeller Configurations and Comparison with Conventional and Fin-Mounted Powerplant Configurations
Abstract
An analysis is presented of the results of a wind tunnel investigation of the aerodynamic and propeller characteristics of 2 wake propeller configurations tested on a 1/20-scale powered model of a modified ZPG- 3W airship. It was shown that a wake propeller designed for a specific wake velocity distribution will produce propulsive efficiencies approaching 100% and will agree with the theoretically predicted values for such a propeller. The wake propeller propulsive efficiencies for the design condition are approximately 30% higher than the maximum efficiencies obtained for conventional airship propellers operating in freestream conditions. The wake propeller configuration, the fin-mounted powerplant configuration, and the conventional car mounted powerplant configuration are compared on the basis of the effects of the various propulsive systems on the performance, stability and control of an airship.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 15, 1961
- Accession Number
- AD0323899
Entities
Organizations
- Goodyear Aerospace