[aerohead]

*The flume would be okay for evaluating 2-D flow of AirTabs on any section.
*You wouldn't be able to test for 3-D flow though.That would require a water tunnel and a model of no more than 5% blockage ratio in relation to the test section's cross-sectional area.
*Water tunnels are problematic,as it's hard to penetrate the ground plane with the 3-axis balance.
*They typically require that the model be mounted to an overhead sting (as OPEL does with it's moving ground floor tunnel) and all force measurements are taken from 'above.'
*Texas Tech constructed an underwater tow tank in which the model road the floor of the tank,connected to a sting,which was attached to an overhead gantry crane which road on rails just like the US NAVY's David Taylor Model Basin in Maryland.
*This would make 3-D flow visualization and drag measurement possible.