Just saw this today - could be useful to help people with dual deployment testing - got it from Apogee e-zine

Link here: http://www.apogeerockets.com/education/downloads/Newsletter256.pdf

I think hotspot uses a vacuum cleaner for his testing....so somewhat similar?

I need this...whenever my electronics get here....USPS says its still in Brazil...ugh!

we use a vacuum device cannot go into where the components came from   but think about what we sell. Works well though  

Hmmm I was sitting there for about 2 minutes thinking "binder accessories" but then it dawned on me what you might be using...hahahahaha, but hey it works well I bet!

i actually want a wind tunnel

Quoted from DAZZA98

i actually want a wind tunnel

We had one at school, which worked well enough. It was hooked up to the dust extraction, which is basically an extremely high powered vacuum cleaner. It was a very wide PVC pipe with a clear plastic pipe section set in it as a door/window, and a platform for the things being tested. The amount of drag is calculated with a fishing line tied to the front of the test model, out through the bottom of the pipe and tied to a heavy metal block on scales. The amount lighter the scales read is the amount of tension in the line, hence the amount of drag.
It obviously doesn't reach rocket airspeeds, but it does allow comparisons between rocket designs.