I think a bright light reflected reflected from a projection screen (like for a slide show) will give you enough bright defused light to see the refraction differences from the shock waves in the plume. Anybody got an old slide projector and screen? You might have to do some processing tricks with the video to see the plume clearly, contrast and edge detection perhaps?
Doug Jones wrote:
John Carmack wrote:
http://www.armadilloaerospace.com/n.x/Armadillo/Home/News?news_id=232
Solvay Ultra-Pure works fine for our mixed-monoprop system.
Re: your invisible plume issues, since you guys have such an electronics bent, maybe you could try putting an IR filter on your closeup video camera- there may be enough 800-1200 nm emission to make shock diamonds etc show up.
Utterly unrelated, I found a very useful Excel add-in at <http://www.unit-conversion.com/excel.htm> which makes even complex unit conversions such as Mpa.kg/m3 to psi.lb/in3 (should you wish- shudder) with only three cell references. It's like the stock CONVERT function, but much more capable. Good stuff.
Doug Jones
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