[nimblemotors]

I would suggest that you build a tether car track,
American Miniature Racing Car Association - Tethered Car Racing
and then you can build a model, keep the engine constant and change the body and measure how fast it goes. The top speed improves when the aerodynamics have improved. in fact, power it with electric motor to make it more constant than a gas engine.
Jack

Originally Posted by AndyL

Ok so this is making me nutty... 2D simulators suck in real world applications

I'm hunting around, find lots of homebrew wind tunnels... Problem is, they're "smoke and mirror" based, yes you can see eddies, vortices, etc... But they don't put numbers to the tests... I'm a numbers guy...

So, request of you folks who understand the mechanics better... What do I need to do - to measure Cd from a model?

I'm going to run with this as a starting point,
https://wiki.engr.illinois.edu/displ...HKK)+by+Team51
But I'm thinking of using Breakout Board MPXV7002DP instead of the pitot tube setup used in the HAWT...

But thats only part of the equation, it still doesn't give us a Cd, so need to measure the drag, load cells are relatively simple and easy to get my hands on - then the question is, put a stationary model on a slideable platform?

Any thoughts/suggestions before I start hacking up some acrylic?

Thanks in advance,