An in-depth look with video at Ridley’s latest super bike, the Ridley Dean Team Replica.
The Dean was, like most of its peers in these pages, born in CFD and tested in a wind tunnel. However, Ridley added another phase to their development process – oil mapping. Ridley’s R&D manager, Toon Wils, explains how it works: “A wind tunnel tells you the total drag on the bike but not the reason. To understand these forces we use oil mapping. We spray a fine layer of oil on the bike and test it in the tunnel. Afterwards, the pattern of the oil shows where the airflow releases from the frame.”
To better control the airflow, Ridley came up with F-Surface, precisely positioned ridges on the frame that ‘trip’ the air, creating an earlier separation from the frame but in a controlled way which actually holds more of the airflow against it for longer. “The wake behind the tube is remarkably decreased,” says Wils. “At 40kph, F-Surface reduces drag by four per cent.”
The other key technology is Ridley’s ingenious F-Splitfork, claimed to reduce drag by 7.5 per cent. It’s split up each leg so that air circulating forwards with the wheel can pass back through the gap rather than crashing into the airflow arriving from the front.
The Dean is ridden by Belgian team Uplace. Tine Deckers won Ironman Nice with a new race record (9:16:05) after pulling out a lead on the bike.
Frame Dean Fork 4ZA F-Splitfork TT
Gears Campagnolo Record
Brakes Tektro TT
Wheels Campagnolo Bullet
Finishing kit Deda Kronos aero handlebar, Deda 01 stem, Selle San Marco Aspide TT saddle
For more information, please visit www.ridley-bikes.com
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