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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Den Gennaker auf der Luv Seite bergen geht ganz einfach und ist sehr sicher. Üben must Du natürlich auch dieses Manöver. Dafür gibt es die J 70 MasterClass mit dem Segelberater Oliver Ochse

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Puma 34. Caño de Sancti Petri.La calma tras el temporal de Levante.

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1976 Michicraft Canoe - T-17 Deck Removal www.sailingwithjosh.com The Resourceful Sailor

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Tercer día de la Travesía Aruba-Colombia. Por fin hemos llegado a tierras de Colombia!!! Lo habremos conseguido? O habremos tenido que llamar para que nos remolquen!?😱🤷🏼 . . . #sail #sailing #barco #barcos #catamaran #sailing_lasonambula #velero #paradise #tortuga #tuttle #caribe #caribbean #carib #destino #navegar #navegaravela #navegarporelmundo #travel #sailingaroundtheworld #navegaravela #island #aeroplane #aruba #plane #shroud #aeroporto #obenque #guaya #aruba🇦🇼 #colombia

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