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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Copa CUMMINS XXII, 2019 . . . . . . . . . #CopaCummins2019 #HobieCat #HobieCat16 #Regata #Verano2019 #Playa #Mar #Yucatan #Summer2019 #Vacaciones #Beach

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Welcome to Navel Gazing at Camp David Shorts. I'm your host Hazel. In this episode, we dive into the crucial topic of Sailboat Navigation Lights and Rules of the Road. Discover the significance of navigation lights on sailboats and gain insights into the international rules that govern safe vessel interaction. Stay informed and sail confidently with the knowledge shared in this short. For more in-depth sailing content, subscribe to our YouTube channel, Navel Gazing at Camp David, and enjoy full tours and reviews of catamarans and monohulls with your host, David Orton. 📚 For additional reading, check out 'The Annapolis Book of Seamanship' by John Rousmaniere, Simon & Schuster, 2014, and 'Navigation Rules and Regulations Handbook' by the U.S. Coast Guard, Skyhorse, 2014. 🔍 Reference Books: 'The Annapolis Book of Seamanship': https://amzn.to/3nQFHzU 'Navigation Rules and Regulations Handbook': https://amzn.to/3CZvVOG 🚢 Tags: SailboatNavigation, RulesoftheRoad, SafetyAtSea, SailingTips, MaritimeGuidance, NavigationLights, InternationalRules, Seamanship, Circumnavigation, CatamaranReviews. Don't miss out on the latest insights; hit subscribe and sail with us into a world of maritime knowledge. Fair winds and following seas!

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Is 90°F Too Warm to Sail? #boat #sailing #shorts

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