By Frank Rowland Whitt, David Gordon Wilson
The second one variation of Bicycling Science contains new info on fresh achievements and experiments in human-powered transportation, from the "ultimate human-powered vehicle" (UHPV) during which supine riders can in achieving speeds good over 60 mph, to human-powered plane, boats, and rail transportation. New chapters conceal the heritage of bicycle and humanpower know-how and technology, and the speed-power relationships of varied modes and autos together with functionality predictions for the UHPV and the "commuter human-powered vehicle." The chapters on braking, steerage, friction, air drag, rider cooling, and transmissions and gearing have all been enlarged and up-to-date. James McCullagh, editor of Bicycling journal has written a Foreword for this version which additionally comprises many new illustrations.
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Additional info for Bicycling Science (2nd Edition)
From reference 5. Development was fast in Britain, where production had been started more to fill the unsatiated French demand than to supply any domestic market. The technical leadership was repeatedly taken by James Starley. 12). This has remained the standard spoking method to this day. Front wheels were being made larger and larger to give a longer distance per pedal revolution, and therefore greater speed. Starley and others recognized the advantages of using a chain as a step-up transmission, but experimenters found that the available chains quickly froze up in the grit and gravel of contemporary roads.
5 Average speeds and estimated breathing capacities in 50-mile trials (1971) as a function of age. trapolated to 80 years, the estimated breathing capacity is indeed very close to half the peak value. (These results are for athletes. ) These data are also given some confirmation by the performances at different times of Reg Harris, the former world champion sprint bicyclist. 9 m/sec) for the final 200-meter sprint on the track. (In this final spurt his muscles would largely be working anaerobically).
Fletcher, E. Generation M. Widdowson, and R. A. MacCanee, Energy expenditure and food intake of individual men, Br. J. Nutrition 9 (1955): 286-300; M. S. Malhotra, S. S. Ramaswany, and S. N. Ray, Influence of body weight on energy expenditure, J. Appl. Physiol. 12 (1962): 193235; J. D. Brooke and C. J. Davies, Comment on "The estimation of energy expenditure of sporting cyclists," kg cal/min Ergonomics 16 (1973), no. 2: 237-238; and reference 14. Curves A and B (estimations for tractive-resistance calculations) from reference 6.