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Water tunnel vs Wind

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JerryFlyGuy

Well-Known Member
Joined
Sep 7, 2005
Messages
67
Location
Canada
So, I've been thinking that maybe I'd try and do some 'wind tunnel' type tests on a design I've been banging around. I've noticed an increase in water tunnel type products and for the Re that I'm looking at testing in, I'm thinking a water tunnel might be the answer? I could build a re-circ wind tunnel [even know where I'd get the fan's etc and have a 'spare' motor that I could use to drive it all..] but the size of the tunnel would need to be fairly large [$$] vs doing the same tests in a water tunnel. However, I'm not sure how accurate a water tunnel test is vs a 1/4 scale wind tunnel [or more likely a 1/8 scale]..

Anyone have an opinion..?

The one thing I haven't seen [haven't looked tooo hard for it yet] is the K number that would be used to calculate my Re accurately.

I do plan to do 1/4 or scale model tests [Rc] but thats after getting down to the finer points [at least thats how I see it]..

Just kinda thinking out loud at this point..

J
 
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