Validation of a Bird Substitute for Development and Qualification of Aircraft Transparenciles
Abstract
This report describes an experimental study designed to validate a substitute bird for development and qualification of aircraft transparencies. For a substitute bird to be accepted by the transparency community it has to generate the same impact loads as real birds and damage the transparency in the same manner. Nominal 450 g real and spherical substitute birds were launched onto 0.635 cm thick polycarbonate panels at four different locations. The minimum perforation velocity was used as the main criterion to measure damage; however, perforation wasn't achieved at the center panel and at the lower, or upstream, corner. Therefore, other measures of damage were adopted for these locations; length of cracks, depth of pocket, etc. Also, temporal and spatial distribution of loads were measured for 60 and 600 g spherical substitute birds at three impact angles (90 deg, 45 deg, and 25 deg) and three velocities (100, 200, 300 m/s). Time-pressure traces recorded in this program showed a rise and decay of a shock pressure; no steady-state flow was observed.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1980
- Accession Number
- ADA097736
Entities
People
- Antonios Challita
Organizations
- University of Dayton