I missed this bit "Keeping a schlieren optical system correctly aligned while in proximity to an operating shock tube tunnel might be ... interesting! (At least electronic imaging -probably- makes life easier than some of the stories I've heard about the old high-speed film cameras...)" Yes, but concrete is cheap. I'm just "banging around" with the idea out loud. Monroe > -------- Original Message -------- > Subject: [AR] Re: Concussion Wind tunnel > From: David Weinshenker <daze39@xxxxxxxxxxxxx> > Date: Wed, September 03, 2014 8:51 am > To: arocket@xxxxxxxxxxxxx > > > Monroe L. King Jr. wrote: > > Schlieren photography > > Well, yeah, that's an example of the sort of "specialized optical > system" I was envisioning: I remain curious regarding the larger > point... assuming the success of such an imaging campaign, what > is thereby revealed that would be of interest from an engineering > point of view? > > (I recognize that capturing pretty pictures of > schlieren-visualized shock wave effects is not > an uninteresting act in itself, of course, but > presumably there's some object to the exercise > beyond the mere image?) > > Keeping a schlieren optical system correctly aligned > while in proximity to an operating shock tube tunnel > might be ... interesting! (At least electronic imaging > -probably- makes life easier than some of the stories > I've heard about the old high-speed film cameras...) > > -dave w