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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24

THALIA is an astonishing throwback to the earliest, 19th-Century days of organised yachting, yet she’s a thoroughly practical, easily handled classic yacht. Wanhill of Poole is a name etched in the history of that period, and THALIA carries that direct lineage with her, together with the old world charm and amazing looks that have rescued this characterful cutter more than once from the chainsaw. https://www.sandemanyachtcompany.co.uk/yacht/626/THALIA Her Millennium restoration undertaken with skill and passion, honoured and enhanced in current ownership, has ensured a long future life, surely well into her third Century. In recent years THALIA has taken part in transatlantic adventures her original designer and builder couldn’t have dreamed of, and she’s been a cherished family cruiser-racer closer to home.

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848

Sailingboat - Både sælges, Molich X-Meter, 1981 DKK 400.000 Scanboat https://www.scanboat.com/en/boat-market/boats/sailingboat-molich-x-meter-17516342

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213

Beautiful sailingboats

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470

Mmmm, what can I say. This is the story of a typical gig . . . . . and a dogs bum!

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696