Catesby is a 1.7-mile disused railway tunnel turned aero test facility - we help Ariel get some drag coefficients
If you need convincing that minimising aerodynamic drag is vital in cars, all you need to know is that above about 40mph, a car’s aero load is the main retarding force for its engine to overcome, exceeding stuff like mechanical drag and rolling resistance. Since most cars can do much more than 40mph, another fact comes starkly into play: that aerodynamic drag rises as the square of speed. Double the speed and you need four times the power. Treble the speed and you need nine times the power.
Which other venue could offer a straight and flat test track protected 365 days a year from wind, weather and prying eyes, with a perfect surface and no noise regulations to interfere? Catesby provides all of this. It is a perfectly straight, 2.7km former Victorian railway tunnel, running through a confluence of rural hillsides south-west of Daventry in Northamptonshire.
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