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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Set in 22 acres of parkland along the picturesque River Orwell in Suffolk, Woolverstone Marina and Lodge Park is the perfect base for cruising, with easy access to the sea and scenic destinations. The marina offers 235 pontoon berths, 45 swinging moorings, and a water taxi service, along with a luxurious lodge park, a sailing school, and the Royal Harwich Yacht Club for corporate and private events. For dining, the new MoniMar bar and restaurant provides a relaxed setting to enjoy a quality coffee, a family meal, or an evening cocktail while taking in the stunning marina views.

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Windelo is a catamaran brand that has the wind in its sails. What's driving its success?  Let's took a look at some of the features that make these ecos cat stand out Almost 6000W of Peak Solar -Hydrogeneration -Shaft Drive Engines -The safe, forward cockpit -The modular living space with tilting platform and aft door -Basalt fibre and PET foam used in the build -The wrap around windows down below. -What's your favourite feature on the Windelo? #electricboat #eco #yachting @windelocatamaran

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Discover the amazing sea cucumbers, also known as trepangs! Watch their unique shapes up close.

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