Accession Number:

ADA045425

Title:

Assessment of Load Alleviation Devices Installed on a Power-Augmented-Ram Wing over Irregular Waves.

Descriptive Note:

Final rept. Oct 76-Aug 77,

Corporate Author:

DAVID W TAYLOR NAVAL SHIP RESEARCH AND DEVELOPMENT CENTER BETHESDA MD AVIATION AND SURFACE EFFECTS DEPT

Personal Author(s):

Report Date:

1977-08-01

Pagination or Media Count:

70.0

Abstract:

An investigation was conducted on Carriage III at the David W. Taylor Naval Ship Research and Development Center to determine the motions and performance of a power-augmented, wing-in-ground-effect model with load alleviation devices. The effects of soft and bumpered endplates and a flexible flap were investigated for a range of velocities, thrust-to-weight ratios, and irregular wave sea states. Results show that the flexible flap can provide a smoother, softer ride for a thrust-to-weight ratio of 0.20, but at the expense of decreased average heave and increased average drag. Results also indicate a transport efficiency degradation from 23.18 to 10.06 with increase in sea state from 0 to 5 for the model without load alleviation. The results are inconclusive for the soft and bumpered endplates. Author

Subject Categories:

  • Aircraft
  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE