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High-speed mass transportation, a new concept : an exploratory study by members of the faculty of Rensselaer Polytechnic…

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ENTRANCE I LA~~~"-- FIG. 24kL2 12kL2 o L I EXIT I distance B - - - - - - J .......... 41--- C ~ a long curve…
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1.0 DEVIATION OF CURVE a-o.s FROM STRAIGHT LI N E N 0.8 > I. 0.6 ~ N' 0.6 ..J at 0.4 o 0.5 1.0 2.0 x…
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1.0 0.8 ..J .,. ~ 0.6 N N ..J 0.4 o 1.0 a-o.s 0.6 0.4 0.2 a-o.s 0.5 1.0 FIG. F-7 ROLL RATE I.e TORQUE 2.0…
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OPEN-LOOP CONTROLLER Nol . + r-t' F(~)b.in( ) NF +. :r-. I Jilt '~+ ~+ , r ~ N fb .. AMPLIFIER -,,/ I…
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0.8 (.) ""C Q) fI) 0 "" 0.6 '- ""C 1 0 '- a = 0.5 W l ..J W 0.4 2xI04…
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0.6 NO FEEDBACK CONTROL 8(0) II 0 0.4 • 8(0) = 0.1 rad/sec 0.2 II) WITH c FEEDBACK 0 .-"0 0 ~ 0 3 z TIME…
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DESIRED ERROR CORRECTION .... COMMUNICATION ... VEHICLES ~ ... COMPARE .. CHANNELS r TRAFFIC ... .. COMMANDS ...…
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SECTION G BRAKING by Joseph V. Foa
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G-l G. BRAKING (Foa) G-l. ABSTRACT One of the advantages of a non-evacuated system is that the confined air masses in the…
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G-2 separate identification of thrust and drag is not possible, and one can only speak of an "equivalent drag…
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--------~ G-3 masses becomes that of a piston of some permeability. In estimating the retarding force that is generated on…
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G-4 270 tons at Mo = 0.50, 1100 tons at Mo = 1.5. When acting on a 100-ton vehicle, these forces would produce initial…
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G-5 The resulting pumping action could be used, for example, to purge long stretches of the tube by forcing vitiated air out…
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G-6 the best ways to utilize the available mechanical energy that is acquired by the air masses in the tube in the braking…
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SECTION H SWITCHING AND BRANCHING by Joseph V. Foa -
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H-I H. SWITCHING AND BRAKING (Foa) H-I. ABE TRACT Switching is a critical operation in high-speed, high- density land…
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H-2 of interesting new switching techniques, which may simplify the structural problem or even eliminate it entirely.…
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(2) The vehicle is at the correct angle of bank at every instant; H-3 (3) The maximum centripetal acceleration must not…
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H-4 Therefore, with the approximation J~~ - V, the rate of roll is . d~ '" V 4>=di~ or (6) The maximum…
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H-5 f :::::. 967 ft and t.:::::::.. 943 ft, respectively. In this case the design of the switch is controlled by stipu1a-…
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H-6 flexing". In the "switch" stretch, the tube is essen- tially a cantilever beam with its built-in end at…
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For the case considered as the first illustrative ex- ample in Art. H-3 ( E. = 1, d = 18 ft, e = 967 ft), Eq. 11 yields 6i~E…
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H-8 switches can be designed to meet any branching require- ment. By means of counterweights or other energy-storage devices…
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H-9 must rely on the operation of an external high-pressure air supply which is subject to failure. Perhaps, for greater…
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H-10· the guideway is slanted transversally in the branching portion. The angle of slant is so chosen that vehicles…
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