FAA JT3D Quiet Nacelle Retrofit Feasibility Program. Volume II. Upper Goal Ground Testing.
Final rept. Jul 71-Mar 74,
BOEING CO WICHITA KANS WICHITA DIV
Pagination or Media Count:
The Phase 2 quiet nacelle for JT3D powered 707 aircraft is identical to the Phase 1 quiet nacelle in that it retains a two-ring acoustically treated inlet, hydraulically powered fan thrust reverser and 34 length acoustically treated fan ducts integral with the side cowl. The Phase 2 nacelle, however, differs from the Phase 1 nacelle in that a plug nozzle replaces the conventional conical nozzle. Both configurations retain the standard 707 primary thrust reverser. Boeing funded model and full scale ground tests were performed to provide insight and technical background relating to acoustic and propulsion performance of plug nozzles. The information thus obtained was used in the design of the full scale hardware. Full scale engine ground tests were performed on two configuration of the Phase 2 upper goal quiet nacelle to determine its acoustic and propulsion performance and to permit comparison with the performance of the Phase 1 nacelle.
- Transport Aircraft