Quick test of a tiny QEV cannon firing air at 12atm, viewed through a Schlieren setup (no razor blade). Unedited at 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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The two sides of my Madeira Expedition: the romantic moments that took my breath away, and the challenging seas that tested my spirit. Sailing is all about embracing both the calm and the storms, and this trip had plenty of both. Every sunset, every wave, every challenge made me love the sea even more. ⛵️🌅🌊 Follow @ElmarSailing for more adventures on the water and behind-the-scenes moments from our expeditions!

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Nossa Senhora dos Remédios Lamego 2013

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