Quick test of a tiny QEV cannon firing air at 12atm, viewed through a Schlieren setup (no razor blade). 1/8th speed (15fps) and improved video performance because somehow Youtube cropped the last frames of the other videos (?) 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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Australia Day Weekend Special 🎉 Kick off 2025 with an adventure! Buy 1 event, get the 2nd one FREE! 💥 Hurry, offer ends Monday, Jan 27, 8 PM! 🛥️ Choose two events from our sailing calendar, and your second one’s on us. ⚓ Use code STRAYA at checkout and let’s get you out on the water this year. Adventure’s calling, don’t miss it! 🌊 Click here for more info and conditions: https://oceansailingexpeditions.com/australia-day-promo-2025

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Nouvelle formation moniteur voile habitable 2014/2015 http://www.srr-sailing.com/erh-ecole-rochelaise-d-habitables/formation-moniteur-voile/

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