Both Aston Martin and Red Bull have access to good wind tunnels and have produced – certainly in Red Bull's case – some exceptional machinery over the past couple of years.
Choosing to throw millions at a new wind tunnel, since a new facility doesn't guarantee performance, is something of a calculated risk. If an old tunnel is good enough, it can be retrofitted with new machinery to bring it up to date without the need to delve into a brick-and-mortar rebuild.
