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1 Sep 1970

Technical Reports

Heat-Assisted Tunnel Boring Machines

Author
J. P. Carstens, W. R. Davison, C. A. Brown, A. R. Smith, F. J. McGarry

Subject Facilities & Test Equipment, Tracks & Structures

Keywords: Tunneling Machine Performance, Laser Technology, Excavation

Abstract:

A study was performed to determine: a) the increase in tunneling machine performance in hard rock resulting from heat weakening of the rock in advance of the tunneling machine...

Report Number
FRA-RT-71-63
Office
RDI-22

1 Mar 1969

Other Reports

Grumman Project 483 Tracked Air Cushion Research Vehicle

Author
Grumman Aircraft Engineering Corporation

Subject Facilities & Test Equipment

Keywords: Air Cushion Vehicles

Abstract: This document contains a table of contents and summary of the final report on the Tracked Air Cushion Research Vehicle to the Department of Transportation under the contract DOT-...

Report Number
FSR-ST-4
Office
RRD

1 Jun 1968

Other Reports

Review of Effects of Hypervelocity Jets and Projectiles on Rock

Author
George B. Clark, Charles J. Haas, John W. Brown, Clifford D. Muir

Subject Facilities & Test Equipment, Intelligent Railroad Systems, Tracks & Structures

Keywords: Excavating Equipment, Mining, Tunnels

Abstract: New methods are being continuously sought which will radically increase the rates of tunnel excavation. Attention has turned to the use of hypervelocity impact as a means of...

Office
RRD

1 Sep 1967

Other Reports

Analysis of Optimum and Preview Control of Active Vehicle Suspensions

Author
Erich K. Bender, Igor L. Paul

Subject Facilities & Test Equipment, Evaluation

Keywords: Intelligent Transportation Systems, Motor Vehicles, Suspensions, Vehicle Dynamics, Vibration

Abstract: The analysis leading to the optimum transfer function for an active suspension excited by a random guideway input is briefly reviewed and a design chart is presented. A parameter...

Report Number
DSR-76109-6
Office
RRD