Thursday 23 May 2013
Rocket-Powered Bike Sets Land Speed Record
By strapping a hydrogen peroxide-powered rocket to his bike, daredevil
cyclist Francois Gissy broke a land speed record this past Sunday,
reaching a top speed of 163 MPH. Gissy set his mark along a vacant
stretch of highway in Munchhouse, France, besting the previous
rocket-powered bicycle record of 150 MPH set in 2002. Gissy’s monopropellant rocket, built by Swiss company Exotic Thermo
Engineering, was full of concentrated liquid hydrogen peroxide, about 30
times more concentrated than stuff you can pick up at your local
Walgreens. The concentration is fed from the tank into a secondary chamber
that houses a catalyst — usually silver. When the reaction takes place,
the hydrogen peroxide breaks down into heat, water and oxygen to create
steam that’s 650 degrees Fahrenheit. That steam is then pushed through a
rocket nozzle, giving the bike its thrust. While Gissy broke the record for rocket-powered bikes, he was
still 4 MPH off the fastest cycling speed of 167 MPH that Dutch cyclist
Fred Rompelberg set in 1995 while riding in a slipstream, sans rocket. (discovery)
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