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On the 9th of October 2010 Ellen van Vugt (Netherlands) and Axel Fehlau (Germany) improved the existing 6h world records for human powered vehicles.
Location The attempts took place at the test track of the Adam Opel GmbH Motor Company in Dudenhofen/Germany. The altitude is appr. 120 m above sea level. The track is a circle with a length of 4,77932 km with banked curves. There are three lines of tarmac for speed testing and an inner roll out line of concrete tiles. The length of the lowest tarmac line is base for the distance calculation. The track is equipped with light.
Vehicles The riders rode the fully streamlined twowheelers "Speedhawk2". The vehicles are designed by Ralf Siber together with the VRT-speebike team (Guido Mertens, Hans v. Vugt, Rob Jansen, Stefan Goroncy).
 "Speedhawk 2" without the full streamlining
Timing equipment and calculation Time was kept manually with a radio synchronized clock. The riders had to finish the last lap after having gone for 6 hours. The distance calculation includes the portion of the last lap, which was required to finish 6 hours. In oder to reflect the inaccuracy of the manual time keeping in the calculation one second of tolerance was respected.
Environmental conditions The sky was clear. The runs started at a temperature of appr. 19°C and dropped over time to 9°C. The humidity increased over time to mo re than 80%.
Observers Martin Staubach (Germany) observed the run. A chase car with two passengers from the teams followed the vehicle in a distance of appr. 100m to watch it keeping track, for safety reasons and at night for lighting the track. Besides the riders and the observer 6 people of the team were attending the runs.
Safety The riders wore a SNELL/ANSI approved helmet. At the start the vehicles were supported for appr. 10 meters until the riders were fast enough to ride free.
Ellen van Vugt The run started at 17:11:36. She had some trouble with the vehicle in lap 15 but was able to fix it on the way. She made a stop in lap 59 to dry the moisturized plexiglass hood and regain transparency. Ellen completed 71 laps. Calculation: Ellen rode 71 laps in 06:00:40hours. This is a total of 339,332 km, average speed 56,45km/h. She rode 00:00:41hours above 06:00:00 (including one second tolerance added) which results in a distance of 0,643km which are subtracted from the total distance. This results in a total distance over 6hours of 338,689km with an average speed 56,448km/h.
Axel Fehlau The run started at 17:32:52. Due to a different setup of the intake nozzle and ventilation Axel had no issues with moisture inside the vehicle and could finish the ride without intermediate stops. Axel completed 90 laps. Calculation: Axel rode 90 laps in 06:02:42hours. This is a total of 430,139km, average speed 71,16km/h. He rode 00:02:43hours above 06:00:00 (including one second tolerance added) which results in a distance of 3,222km which are subtracted from the total distance. This results in a total distance over 6hours of 426,917km with an average speed 71,153km/h.

Knowing his capabilities and using the SRM Training System as a tool to control his performance made it possible to break the world record. It's interesting to see that Axel was pedaling the whole six hours without any rest. His very constant heart rate is also a good proof of a very consistent ride and enough fluid intake.

Axel Fehlau preparing for the ride. Psychological factors of a 6 hour ride can't be underestimated.

In a good mood Axel started into his ride. He knew that he's well prepared e.g. the energy requirements were calculated as exact as possible so he had enough carbohydrates for the ride.
Thanks a lot to Martin Staubach (STAPS) for the article.

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