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The Challenge 100mph - Pendine Sands - May 22nd-23rd 2010
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100mph may not sound very fast, and most modern cars are capable of reaching such speed. However, at 100mph, the lawnmower will be travelling down Pendine Sands covering the ground at a rate of at least 147 feet per second, and will travel through the measured mile in less than 36 seconds. The wind resistance at this speed is considerable: ask any motorcyclist! And then there's the aerodynamics to consider: too much down pressure will waste engine power, slowing it down, whilst insufficient could result in the machine actually becoming airborne with potentially disastrous results. Keeping it going in a straight line is another problem.
Making a machine light enough and stable enough to pass these hurdles is a huge challenge, and safety is a concern of paramount importance if we are to avoid imitating Richard Hammond's now famous stunt. Building an engine with enough torque to push it through the cold air at 100mph is another challenge, and to cap it all, the machine that takes the record will still be capable of cutting grass, which it will demonstrate on the very same day it takes the record.
In order for the record to be internationally accepted, the team will be using the rules set for cars many decades ago: the speed will be measured by travelling through a measured mile in both directions, each run within one hour of the other, and the average of the two runs will determine the final speed.
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