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They enclose the rider and machine in aerodynamic shapes made of carbon fibre, Kevlar or fiberglass to reduce air resistance. The record hour average speeds for these machines – 90 km/h (56 mph) for men and 84 km/h (52 mph) for women – are faster than a UCI rider could perform even in a short 200-meter sprint for 10 seconds, 72 km/h (45 mph ...
From a mechanical viewpoint, up to 99% of the mechanical energy delivered by the rider into the pedals is transmitted to the wheels (clean, lubricated new chain at 400 W), although the use of gearing mechanisms reduces this by 1–7% (clean, well-lubricated derailleurs and a straight chainline), 4–12% (chain with 3-speed hubs), or 10–20% (shaft drive with 3-speed hubs).
The first to surpass 200 km/h was the Frenchman Jose Meiffret in 1962, when he reached 204 km/h (127 mph) behind a Mercedes-Benz 300SL car on a German motorway. [30] Allan Abbott, a cycling enthusiast and motorcycle racer, elevated the motor-paced bicycle speed record at the Bonneville Salt Flats, reaching 223 km/h (139 mph) in 1973.
Wooden dandy horse (around 1820), a patent-infringing copy of the first two-wheeler Original Laufmaschine of 1817 made to measure.. The dandy horse, an English nickname for what was first called a Laufmaschine ("running machine" in German), then a vélocipède or draisienne (in French and then English), and then a pedestrian curricle or hobby-horse, [1] or swiftwalker, [2] is a human-powered ...
A pace is a unit of length consisting either of one normal walking step (approximately 0.75 metres or 30 inches), or of a double step, returning to the same foot (approximately 1.5 metres or 60 inches). The normal pace length decreases with age and some health conditions. [1]
Casio was established as Kashio Seisakujo in April 1946 by Tadao Kashio [] (1917–1993), an engineer specializing in fabrication technology. [1] Kashio's first major product was the yubiwa pipe, a finger ring that would hold a cigarette, allowing the wearer to smoke the cigarette down to its nub while also leaving the wearer's hands free. [6]
They run alongside stairs with the cyclist walking beside the bike holding the brakes on. [2] [4] [11] The front brake must be released as the bike leaves the travelator, especially if it immediately has to turn a corner. [12] They may be made to adapt their speed to the walking pace of the cyclist and take all diameters and widths of bicycle ...
It was found that the Cd (drag coefficient) of Obree's initial "tuck" or "crouch" position was 0.17, compared to a conventional 1990s bike position of 0.20 and a modern conventional position of 0.188, leading to an estimated gain in speed of about 2-2.5 km/h over his rivals in the 1990s and a gain of 1.5 km/h over contemporary track cyclists ...