Thomas Morsellino is a French freelance journalist and photographer, with keen eye for the technical details of MotoGP bikes. You may have seen some of his work on Twitter, where he runs the @Off_Bikes account. Peter Bom is a world championship winning former crew chief, with a deep and abiding knowledge of every aspect of motorcycle racing. Peter has worked with such riders as Cal Crutchlow, Danny Kent, and Stefan Bradl. After every race, MotoMatters.com will be publishing a selection of Tom's photos of MotoGP bikes, together with extensive technical explanations of the details by Peter Bom. MotoMatters.com subscribers will get access to the full resolution photos, which they can download and study in detail, and all of Peter's technical explanations of the photos. Readers who do not support the site will be limited to the 800x600 resolution photos, and an explanation of two photos.
Ducati GP19 swingarm attachment
Peter Bom: The now (in)famous aerodynamic modification on the Ducati, which they claim channels extra air onto the rear tire, which keeps it cooler and improves performance. Since its introduction, we have also seen a similar device on the Honda RC213V, and we expect to see more at Jerez.
Honda RC213V swingarm attachment, side view
David Emmett: Compare and contrast Honda's swingarm spoiler (above and below) with Ducati's above. Honda's spoiler is much shorter than Ducati's, and is concave, rather than convex like Ducati's. One reason Honda's spoiler is shorter is because the fairing lower is different. The bottom of the Honda's fairing is higher than the bottom of Ducati's fairing, meaning there is more of the rear tire exposed to the air anyway. This may also be why the Ducati requires the front wheel covers to guide the airflow onto the spoilers. The shape of the spoilers are also different, and interesting. The Honda has a single wing or airfoil in its spoiler, which is concave. That would suggest the airflow is channeled differently on the two different bikes. A convex spoiler would shift air toward the sides of the tires. A concave spoiler would concentrate air on the center of the tire.
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