Blown wheel hubs have been adopted by a large number of teams this season, but the feature continues to keep aerodynamicists busy. At Monza for instance, Red Bull Racing briefly tested an alternative to the open wheel hubs by putting a conical cap inside each front wheel's axle. The cap did appear to have small apertures to still allow some airflow to get through, but clearly much less than what would otherwise be possible. Both cars however were running the usual open hubs in qualifying and the race. The test is particularly interesting as it comes just one week after the Belgian Grand Prix, where Ferrari also did some running with the front axles covered up. Difficult to get right Open...
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