TRAVEL TIME REDUCTIONS AND ENERGY SAVINGS FOR GRAVITY-AUGMENTED, EVACUATED TUBE VEHICLE SYSTEMS

The use of gravity augmentation to accelerate an evacuated TVS affects the travel time, speed, and energy requirements for the system. For stage lengths of 3 to 10 miles characteristic of urban links, savings in travel time can be achieved by gravity augmentation over that for conventional systems operating on the surface. Savings in travel time are achieved however at the expense of higher vehicle speeds which lead to a more complex technological system. For stage lengths up to 100 miles characteristic of a regional transportation system, gravity augmentation results in a savings in travel time at the expense of greater tunnel depth and train speed. A reduction in energy per train trip can also be attained. However, the technological requirements depend largely on the maximum train speed which is sensitive to the propulsion mode of operation selected.

• Supplemental Notes:
  • Report on High-Speed Ground Transportation Systems Engineering Study.
• Corporate Authors:

  TRW Systems Group

  Washington Operations
  McLean, VA  United States  22101
• Authors:
  • King, M
  • Simms, R
  • SMYLIE, J W
• Publication Date: 1970-1

Media Info

• Pagination: 41 p.

Subject/Index Terms

• TRT Terms: Gravity; Intelligent transportation systems; Pneumatic conveyors; Tubing
• Old TRIS Terms: Advanced systems; Gravity augmentation; Tube systems; Tube vehicles
• Subject Areas: Operations and Traffic Management; Railroads;

Filing Info

• Accession Number: 00039173
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: 06818-6035-RO-00
• Contract Numbers: DOT-C-353-66
• Files: TRIS
• Created Date: Nov 24 1972 12:00AM