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Three notes on propulsion and braking of tubeflight vehicles

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I I 0.0 ft- ......... 1.0 It O' 7.0 • .0 .0 4 .0 3.0 2.0 1.0 O 2 ; I ... f; "I ~l .il II 11 n…
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to to 70 10 SO '0 10 20 - - I- ! - . I- . 1.1 1·- t- 17 . I- v .1-1- 1- i== .. ... e=: .~ -…
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I I I I~ Ii 1:- II o i I 100! 70 .3 .2 .. I- j.- I- .. 1- .. +- -+- I- I-I--I-I-'H - 1…
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eo 40 10 10 --1== • -,---,,= • T I 5 .. 5 , 2-1-+ I 50 .100 150 250 Fig. 6 d = 9' v d = IS' t…
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TN PT 6801 PRELIMINARY EVALUATION of the BRAKING CAPABILITIES OF TUBEFLIGHT VEHICLES by J. V. Foa This research was…
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PRELIMINARY EVALUATION of the BRAKING CAPABILITIES OF TUBEFLIGHT VEHICLES by J. V. Faa Fig. 1 describes the condition of…
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vehicle yields po.. = poo p P = pDQ ~-I T -2- (1) where E and a denote static pressure and speed of sound, respectively…
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-3- however, at each speed somewhat higher than if braking were started at that speed. The analysis of this complex transient…
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-4- The initial braking force in condition (b) is greater than in condition (a). The magnitude of the increment may be…
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-5- TABLE II . INCREMENTS OF BRAKING FORCE DUE TO FLOW SEPARATION u... v ~ Bi. min, 1b ips d-r = 15 ft dt = 16.5 ft dt…
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-6- as low as 50 fps (about 35 mph). The use of tubes with porous walls would decrease the maximum attainable braking force,…
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OBSERVER AT REST RELATIVE TO TUBE OBSERVER AT RELATIVE TO VEHICLE I U=O P Uv , U·O I FIG. t
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OBSERVER AT REST RELATIVE TO TUBE OBSERVER AT REST ",,--=::""-_' RELATIVE TO VEHICLE FIG. 2

Tubeflight

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r <.;., j . ' t3rodericK
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Dr. Joseph V. Foa has shown that flight in a tube is feasible. In an era when most scientists are thinking of penetrating…
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I N AN AGE WHEN vast amounts of money are being spent to achieve flight to other planets, a Rensselaer scientist wants to…
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TUBE FLIGHT lowest level that is compatible with the maintenance of the required motion of the vehicle. This condition is…
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points out. As soon as the input of propulsive power were shut ofl', the chang-ed behavior or the vehicle in relation to…
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TUBE FLIGHT PIPELINES SHOWN IN THIS DRAWING could span the nation's mountedns and streams with little difficulty, and in…
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ARTIST'S CONCEPTION OF TUBE FLIGHT STATION showl passengers boarding one of the high-speed vehicles (bottom). Actually,…

Tubeflight power-demand tests and initial validation of theory

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PROJECT TUBEFLIGHh
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TUBEFLIGHT POWER-DEMAND TESTS ~D INITIAL VALIDATION OF THEORY This research was supported by the Office of High-Speed…
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TN PT 6802 (September 1968) ESTIMATED PERFORMANCE OF WHEEL-SUPPORTED VEHICLES TO BE TESTED IN FACILITY T-2 by J. V. Foa N…
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TN PT 6802 ESTIMATED PERFORMANCE OF WHEEL-SUPPORTED VEHICLES TO BE TESTED IN FACILITY T-2 by J. V. Foa N. A. Messina…
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ACKNOWLEDGMENT The authors wish to express their appreciation to Messrs. C. C. Sun and B. P. Barnhart for their assistance in…
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