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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Att använda flytväst till sjöss är en av de billigaste försäkringarna för ditt liv, oberoende av farkosttyp eller väder, använd den!

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Melissa is poorly but still gets on with making incredible custom canvas bits and pieces for our Bluewater floating home. https://getorca.com/?via=sailingmelody For one time donations. https://www.paypal.com/paypalme/sailingmelody Buy us a coffee, or chip in towards restoring and upgrading Ocean Melody. https://ko-fi.com/sailingmelody Or to become part of the Sailing Melody supporters family head over to Patreon.com/sailingmelody where for as little as the price of a cup of coffee you can get live updates, direct messaging with us, early episodes and tonnes of extra exclusive content. Our Sponsors and Partners Custom designed sails. https://www.precisionsailloft.com Craft Insure Boat Insurance. https://www.craftinsure.com Autoterm Planar Heaters. https://planarheaters.co.uk Pro Marine Store Online Chandlery. https://www.promarinestore.co.uk #weareboatfolk #boatfolk #boatfolkmarinas #PortlandMarina #boatfolkadventures #sailwithboatfolk #eatwithboatfolk #Allbyboatfolk @boatcareuk @Portland_marina @weareboatfolk

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