Schlieren airgun (only air) normal speed

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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Give it a thumbs up if you liked this episode! Get your Sailing Into Freedom Crew T-shirt: https://teespring.com/stores/sailing-into-freedom Want more? Became our patron and get access to exclusive content. https://www.patreon.com/sailingintofreedom If you would like to support with single donations click here - https://www.paypal.me/Plukky Check out some gear we have on the boat: Inverter https://www.amazon.com/Xantrex-PROWatt-Inverter-Model-806-1220/dp/B002LGEMOQ/ref=sr_1_5_mod_primary_new?dchild=1&keywords=marine+inverter&qid=1616102481&sbo=RZvfv%2F%2FHxDF%2BO5021pAnSA%3D%3D&sr=8-5 handheld radio https://www.amazon.com/Standard-Horizon-HX210-6W-Compact/dp/B07KN6LKVG/ref=sr_1_6?dchild=1&keywords=marine+radio&qid=1616102542&sr=8-6 (As an Amazon Associate I earn from qualifying purchases and I greatly appreciate your support!) Also follow us on - Instagram: https://www.instagram.com/sailingintofreedom Facebook: https://www.facebook.com/sailingintofreedom Our website: https://www.sailingintofreedom.comGive it a thumbs up if you liked this episode! Get your Sailing Into Freedom Crew T-shirt: https://teespring.com/stores/sailing-into-freedom Want more? Became our patron and get access to exclusive content. https://www.patreon.com/sailingintofreedom If you would like to support with single donations click here - https://www.paypal.me/Plukky

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Rate this classic speedboat from 1-10 🚤 and tell us your dream cruising spot! Riva Aquariva Super © Ferretti Group Length: 33 ft (10.07 m) Beam: 9 ft 2 in (2.8 m) Draft: 3 ft (0.9 m) Displacement: approx. 11,000 lb (5,000 kg) Top Speed: 41 knots or 47 mph (76 km/h) Cruising Speed: 36 knots or 41 mph (67 km/h) Range: approx. 155 nautical miles or 178 miles (286 km) Price: approx. US$ 850,000 The Aquariva Super captures the soul of the legendary Riva runabouts from the 1960s, with mahogany decks, chrome accents, and a sleek silhouette. Powered by twin Yanmar 370 HP diesels, it’s quick, stylish, and surprisingly refined on the water. Designed for chic coastal escapes, it seats up to 8 guests in open-air comfort, with a small cabin and head below deck. Whether you’re gliding through Lake Como or anchored off the Amalfi Coast, the Aquariva Super turns heads wherever it goes. Current pricing starts around US$ 850,000. #RivaAquariva #ClassicRunabout #ItalianSpeedboat #Shorts

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Lazy Days = Local Love Rotary Lookout Point is one of those places that whispers, not shouts. Just an observation platform, some ocean air, and that little reminder that you’re part of something bigger. 🐐 We’re lucky to call this island home. 💙 Where’s your favorite quiet spot on St. Martin? Tell us in the comments! ✨ Want to explore St. Maarten by sea? 👉 Booking & Website: https://lazysheetsailing.com/ 📞 Call or WhatsApp: +1 721 587 0558 📧 Email: sailbruadarsxm@gmail.com 📌 Facebook: Lazy Sheet Sailing 📸 Instagram: @lazysheetsailingsxm Subscribe for more hidden island spots, sailing moments, and local love from St. Maarten! 🌴⚓️✨ #LazySheetSailing #LocalLove #SXM #StMaarten #SlowTravel #IslandMoments #LazyDays #traveldeeper Music: Pixabay Gentle Breeze by Octosound