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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O vídeo mostra os preparativos finais no barco, com pequenos reparos e ajustes para deixá-lo pronto para navegar. Veja o que é preciso fazer antes de zarpar! ⚓ #velejarevida #veleiro #velejar

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If excitement and adventure on the water are what you’re after, the Yamaha 255 FSH Sport H delivers it all! With twin 1.8L supercharged engines and a sleek, cutting-edge design, this boat is built for performance and packed with all the features Yamaha is famous for. Want more? Watch the full test and features review now on BoatTEST! 🔗 https://boattest.com/boats/yamaha/255-fsh-sport-h-2024

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Oooof it's close 🫣 WATCH the day 3 highlights of the 44Cup Calero Marinas 2024. #sailboat #sail #44cup #rc44 #thisiswhywerace #sailingphotography

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