Accession Number:

AD0909219

Title:

Design Procedure for Establishing Aircraft Capability to Operate on Soil Surfaces

Descriptive Note:

Technical rept.

Corporate Author:

DAYTON UNIV OH RESEARCH INST

Personal Author(s):

• Kraft, David C.
• Hoppenjans, J. Richard
• Edelen, William F., Jr

Report Date:

1972-12-01

Pagination or Media Count:

61.0

Abstract:

This report summarizes a systematic design procedure for establishing various landing gear combinations of tire sizes, spacings, and configurations which will minimize rolling drag and satisfy the criteria of 200 nonbraking passes of a selected STOL aircraft operating on a standardized CBR6 or equivalent soil surface. The design procedure presented herein combined the latest results of Air Force sponsored landing gearsoil interaction research with the previously developed WES coverage techniques. This procedure is a first attempt to make the research results of existing Air Force Flight Dynamics Laboratory programs available toward the improvement of flotation design capability. This design procedure, subject to certain stated limitations, includes techniques for 1 predicting rolling and braking drags and drag ratios, 2 incorporating multiwheel influences on drag and sinkage, and 3 determining aircraft passes. Additionally, the design procedure has been incorporated in a computer program format for utilization on the CDC 6600 located at Wright-Patterson Air Force Base. The computer program is restricted at present to aircraft with tricycle type landing gear systems.

Descriptors:

• *LANDING FIELDS
• *AIRCRAFT LANDINGS
• *LANDING GEAR
• *SHORT TAKEOFF AIRCRAFT
• COMPUTER PROGRAMS
• MATHEMATICAL MODELS
• PAYLOAD
• SOIL MECHANICS
• SOILS
• WEIGHT
• TAKEOFF
• RUNWAYS
• BRAKING
• VEHICLE BRAKES
• AIRCRAFT TIRES
• TRAFFICABILITY

Subject Categories:

• VSTOL

Distribution Statement:

APPROVED FOR PUBLIC RELEASE