Helicopter Movement on Unimproved Terrain.

Abstract

A brief review is presented of the current state of the art of criteria for determining the ground-flotation requirements for landing gear of aircraft, particularly fixed-wing aircraft, and criteria for estimating cross-country performance of military vehicles. Discussions are also presented of three soil strength parameters: California Bearing Ratio (CBR), airfield index (AI), and cone index (CI). Results of tests with three helicopter tires in prepared and natural soils are presented, and relations are shown among soil strength, towed motion resistance of some assumed helicopter configurations, and maximum-drawbar-pull capabilities of selected ground vehicles. Also presented is the distribution of terrain factors mapped in a selected West German transect and the probability of moving helicopters over the terrain. (Modified author abstract)

Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1974
Accession Number
AD0780698

Entities

People

  • Charles E. Green
  • Edgar S. Rush

Tags

Communities of Interest

  • Air Platforms
  • Counter WMD

DTIC Thesaurus Topics

  • Abstracts
  • Aircrafts
  • Airframes
  • California
  • Fixed Wing Aircraft
  • Flotation
  • Ground Vehicles
  • Helicopters
  • Landing Fields
  • Landing Gear
  • Military Vehicles
  • Probability
  • Vehicles

Readers

  • Aerospace Engineering
  • Logistics and Supply Chain Management.
  • Pavement Materials Engineering.