Test Techniques for STOVL Large-Scale Powered Models

Paper #:
  • 962251

Published:
  • 1996-11-18
Citation:
Wardwell, D., Naumowicz, T., Hange, C., Arledge, T. et al., "Test Techniques for STOVL Large-Scale Powered Models," SAE Technical Paper 962251, 1996, https://doi.org/10.4271/962251.
Pages:
11
Abstract:
Predicting and testing for hover performance, both in and out of ground effect, and transition performance, from jet- to wing-borne flight and back, for vertical/short takeoff and landing (V/STOL) configurations can be a difficult task. Large-scale testing of these configurations can provide for a better representation of the flow physics than small-scale testing. This paper will discuss some of the advantages in testing at large-scale and some test techniques and issues involved with testing large-scale STOVL models. The two premier test facilities for testing large- to full-scale STOVL configurations are the Outdoor Aerodynamic Research Facility (OARF) and the 80- by 120-Foot Wind Tunnel of the National Full-Scale Aerodynamics Complex (NFAC). Other items of discussion will include force and moment measurements, jet efflux decay, wall effects, tunnel flow breakdown, strut interference, and flow visualization options.The most recent use of NASA Ames Research Center's test facilities were in testing Lockheed Martin's Large-Scale Powered Model (LSPM) of their Joint Strike Fighter (JSF) configuration. The LSPM model description and related test issues will be presented throughout this paper.
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