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Tubeflight power-demand tests and initial validation of theory

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26 * where t (x) and ui(x) are obtained from Appendix A. The total frictional force Ff is given by F f = Fs + Fw' where…
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-2 0.61 x 10 27 The frictional drag coefficient, C f , is essentially independent ofU~for vehicle velocities up to about…
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10 - CD ...J -p lL.- p LLI 6 0 a:: 0 lL. ...J <t z 0 I- 0 -a:: lL. o L = y 8 ft --- Ff Fs ----…
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- m ..J - ~ .. l&J U a: 0 LL ..J 4 « z 0 t- U -a: LL o Lv = 10 ft - - - Ff Fs - - - - Fw…
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JO - 8 CD ...J - IJ.. .. 6 LLI 0 a: 0 IJ.. ...J 4 c( z 0 -~ 0 -a: l.L 2 o Lv = 14 ft - - - Ff Fs…
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31 REFERENCES 1. Foa, J. V., "Power Demands of Tubeflight Vehicles," Rensselaer Polytechnic Institute, Technical…

Tubeflight--a review

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PROJECT TUBEFLIGHT
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TR PT 7001 TUBEFLIGHT--A REVIEW by w. B. Brower, Jr. Reprinted, by permission, from the Proceedings of the Seventh Space…
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TUBEFLIGHT--A REVIEW W. B. Brower, Jr. Associate Professor of Aeronautical Engineering Rensselaer Polytechnic Institute…
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tional desirable operating characteristics. For example, a vehicle designed to operate within it is subject to less…
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in the guideway construction and, under the assump- tions: (a) that the tube wall thickness is small compared to its…
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-4- matched internal propulsion is presented and sever- al calculations are made comparing the power re- quired for internal…
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transferred from a "primary" flow to a contiguous "secondary" flow through the work of the pressure…
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ground effect made with proper simulation of wall boundary conditions. It is constructed to handle flows over a flat ground…
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shed is an office-site trailer which houses the speed-recording instrumentation. The speed-recording instrumentation has…
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0.6 in. Happy to report, this design hovered very well, lifting up to 50 pounds without bottoming. Future designs of…
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probably beyond the capability of a school to handle it within an academic program. It is the writer's opinion, along…
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-10- 18. Cooke, G.C. IV, "Peripheral Jets and Plenum Chambers: An Exact Potential Flow Analysis," Rens- selaer…
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- ll- Figure 1. Ar t i s t I s Version o f Full-S c ale Tube· flight Ve hic l e With Duc c ed Fan at Vehicle Nose , From (6…
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<: (1) 3.0 t c - - - - L - - - - - -... w = weight per unit length of tube Slj)script .01 is reference value where (0…
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0 LLJ (t -::> 0 w a: a:: LLJ :t a Q. I.IJ > -C/) ...J ::> CL a a:: CL • Critical Vehicle ®…
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If) '0 10.0 )( ~ .. "'0 CD ~ :'f 0- CD .... 5.0 ~ 2.0 :. ~ 1.0 0.5 0.2…
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- - -- ------ --------------- - I I-' lJ'1 I
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T . .. .. .. ~ = .. : z " z C IS ! .. i z g ~ ~ .. .. " -16- --@ --@ --8 Figure 6. Tubeflight…
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-17- LOW SPEED AND DOCKING OPERAri ON (ANNULAR JET) r== - ~ / 7 / 7 7 7 I I I ')--, MEDIUM SPEED OPERATION (…
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