Accession Number:

ADA510583

Title:

Performance and Design Investigation of Heavy Lift Tiltrotor with Aerodynamic Interference Effects

Descriptive Note:

Conference paper

Corporate Author:

ARMY RESEARCH DEVELOPMENT AND ENGINEERING COMMAND MOFFETT FIELD CA AVIATION AEROFLIGHT DYNAMICS DIRECTORATE

Personal Author(s):

Report Date:

2007-05-01

Pagination or Media Count:

20.0

Abstract:

The aerodynamic interference effects on tiltrotor performance in cruise are investigated using comprehensive calculations, to better understand the physics and to quantify the effects on the aircraft design. Performance calculations were conducted for 146,600-lb conventional and quad tiltrotors, which are to cruise at 300 knots at 4000 ft95 deg F condition. A parametric study was conducted to understand the effects of design parameters on the performance of the aircraft. Aerodynamic interference improves the aircraft lift-to-drag ratio of the baseline conventional tiltrotor. However, interference degrades the aircraft performance of the baseline quad tiltrotor, due mostly to the unfavorable effects from the front wing to the rear wing. A reduction of rotor tip speed increased the aircraft lift-to-drag ratio the most among the design parameters investigated.

Subject Categories:

  • Aerodynamics
  • VSTOL

Distribution Statement:

APPROVED FOR PUBLIC RELEASE