A Visit to Circuit de Sarthe: Race Course of the 24 Hours of LeMans

A Ford GT40 from the movie "LeMans 66" 

with yarn taped to the car to show airflow during testing

After seeing the movie "LeMans 66" in Paris (English with French Subtitles) I rented a stick-shift Opel and drove west to the town of LeMans, where in June of every year the 24 Hours of Lemans is held.  I have watched parts of the 24 Hours of LeMans on TV, but had never seen the circuit. I have been a fan of motor racing all of my life, primarily Formula 1 car racing, but also sports car racing at various times in the last six decades.

In most of the history of motor racing, the race tracks are known for curves.  The curves "Eau Rouge-Raidillon" at Spa Francorchamps in Belgium, "The Corkscrew" at Laguna Seca Raceway in California, Tabac curve on the street circuit of Monaco, the Maggots-Beckett-Chapel curves at Silverstone and so many more. 

But the signature of Circuit de Sarthe is not a curve, but the Mulsanne straightaway.  Originally run on roads closed for the race, the entire circuit is now a purpose-built race course, except the Mulsanne Straight which is Route D388 in the French highway system. It is open to traffic when no races are underway.

Until 1988 the Mulsanne straight was the longest straight stretch of race track anywhere: 6km or 3.7 miles of full-throttle.  Then in 1988 a Peugeot WM P88 reached a speed of 405km/hr (251mph) and the governing body decided something had to be done to slow the cars down. In 1990 track officials added two chicanes breaking the circuit into three consecutive 2km straightaways. This kept top speed at a safer 225mph.  At 250mph the downforce from the rear wing is so strong it can cause catastrophic tire failure. One car approaching those speeds famously went up into the trees. The car was completely destroyed, but the driver was unhurt.

The website says visitors can walk the track and go the museum. The museum was great with a century of cars and motorcycles, a few of which are in this post.  As it turned out I could not walk the track because there was a 24-hour sports car race in its final hours during my visit. I watched almost 50 cars ranging from race prepped Porsche 911s to a nearly stock BMW sedan circle the track at speed and under a yellow flag. 

Several of the cars spun at the second of the two chicanes on the Mulsanne straight.  They either went into the gravel or onto an escape road and rejoined. Even the cars that collided continued. I saw no race-ending crashes.

Next June I can watch LeMans 2020 and know what the track looks like in person as the top class 800hp race cars circle the 8.5-mile course for 24 hours and as much as 3,360 miles--the race distance record set in 2010.

Motorcycles have raced for 24 hours at LeMans since 1978

Thousands of scale model race cars fill the display cases in the museum