Max Cruise 301 knots / 346 mph / 557 km/h Range 1,149 nmi (advertised) / 1,852 nmi (at max cruise according to Flying Mag) The title of fastest propeller-driven (but not exclusively) aircraft ever ...

This is evidenced by there not being any propeller driven aircraft that can exceed Mach 1. Since an aircraft can’t reach those speeds with a propeller, it follows that a wind tunnel cannot be ...