0

0

0

0

791

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!!

0

0

0

59

An island in Italy’s Bay of Naples, Capri is famed for its rugged landscape, upscale hotels and shopping, from designer fashions to limoncello and handmade leather sandals. One of its best-known natural sites is the Blue Grotto, a dark cavern where the sea glows electric blue, the result of sunlight passing through an underwater cave. In summer, Capri's dramatic, cove-studded coastline draws many yachts. Area: 10.4 km² Location: Tyrrhenian Sea Population: 12,200 (2002) Region: Campania

0

0

0

568

#sailing #mexico #cheoylee #woodwork

0

0

0

561

0

0

0

0

147

Learn to sail holidays on the safe inland waters of the stunning rivers and lakes of the Norfolk Broads. Your instructor sleeps ashore while you sleep aboard in comfort and style. Phone 07876141971 or visit our website for more information. https://www.broadssailingholidays.co.uk/norfolk

0

0

0

321