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Quick test of a tiny QEV cannon firing air at 12atm, viewed through a Schlieren setup (no razor blade). Edited from to 1/4th normal speed. I didn't quite understood the need for a razor blade but without one I still see the flow of air. For me, the razor blade just makes the dot of light smaller(?) If anyone can clarify me what the razor blade really does and where it should be placed (in the source of light or in the camera) I'd really appreciate. Also important to note that this is AWESOME to look with the naked eye but almost the dimmest light can blind you. I covered a tiny LED torch with aluminum foil and punctured a hole with a sewing needle, on the side! so that the LED doesn't bright directly through the hole. Take care with the eyes!!
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#rssailing #sailitliveitloveit
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TRAILER From Sailing Quarterly: Seamanship Vol. 1 Noted sailing author, John Rousmaniere, demonstrates anchoring and retrieving an anchor under sail. Keith Taylor, from Cruising World Magazine, gives pointers on how to med moor. Buy the complete volume at https://youtu.be/mRiVd_gzLsg Also at... http://www.thesailingchannel.tv/seamanship-training-vol-1/ https://vimeo.com/ondemand/seamanship1
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