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Originally Posted by AndyL
Tow tank just requires a lot of length, recirculating tanks not as much...
Thankfully we have access to a couple 3d printers so models won't cost quite so much... making them not float away and getting some data however, could be more challenging in water...
I've found tons of NASA and *IT articles on water tanks, but most gloss over the dimensions, is there a frontal area to tank cross section or similar rule?
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I never dove in deep on this technology,so I can't answer factually.I went the cardboard,duct tape,and tuft route,as it was really low budget in cost.
Since aerodynamics is a branch of fluid mechanics,my suspicion would be that everything is similar excepting wave drag on the sting,although you could do independent tests to evaluate the 'tare' drag of it.
And if you limit your measurement only to drag,you can cheat like hell on the 'sting.' Load-cell,spring tension/compression/pulley-weight system,all kinds of things could be done for force measurements.
I've only seen the Tech facility and the dimensions were enormous in proportion to the model size.I suspect that there was no guesswork involved with respect to its design.
I'll dig for that 1/24-scale article,perhaps there's some quanta in there worth looking at.
I'm off work all next week and can come here to do EcoModder during the heat of the day.I'll bring it.
It's a fun project that you're getting into,we should all learn a lot.
