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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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Subscribe for more Tiwal sailing videos : https://www.youtube.com/c/tiwal?sub_confirmation=1 Learn more about Tiwal and check out our Best Videos : https://www.youtube.com/playlist?list=PLp7rkGxzrxNpemhhNJ0kB8mHF9q0IZWBA -------------------------- ** The Tiwal 2 Sailboat ** The Tiwal 2 is a small inflatable sailboat. It is designed to be carried on a cruising boat. Light in weight, at just 90 lbs, it fits in two easy-to-store bags. Its assembly is very fast: 15 minutes maximum. For single-handed sailing or with a child, the Tiwal 2 is a delight for the whole crew, young and old alike. With the Tiwal 2 you’ll want to stay in the anchorage! Best Boat 2020 Award - SAIL Magazine "A darn good sailer" "No matter how you choose to carry it, and no matter what waters you sail, expect to have an awful lot of fun when you get there." Boat of the Year 2020 Award - Sailing World U.S.A. " By far one of the most fun boats of the week. I’m a Tiwal fan " " It’s well engineered (…), it can handle the big stuff. " -------------------------- ** The Tiwal story ** * The Birth of Tiwal * As a girl, the first time our founder Marion Excoffon was told, “No!” by her father when she asked to use the family boat, her life as an inventor began. It was then she started dreaming of building her own craft, an ambitious feat that would come true years later. On the road to creating an innovative high-speed vessel for everyone from kids and first timers to expert sailors who want to test limits, there were a number of prototypes, failures, challenges and headaches. But, if there’s one thing Marion’s known for, it’s her sailor’s grit! * Combining Fun & Technology * The award winning Tiwal concept is easy assembly and storage - maximum fun and performance for watersports and activities. A Tiwal isn’t your average dinghy! Our design is the result of tons of coordination, talent, and technological savvy. * A Growing Global Community * For our community of Tiwal skippers (more than 2,500 worldwide!) all this innovative design means their focus is fixed on the pleasures of watersports and having tons of fun on a responsive sailing craft. With excellent upwind and downwind abilities combined with high-speeds, Tiwals are a part of both fun and professional performance.

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Ritorno a Brisbane da Gold Coast pt4 Segui @matteorapposelli_ #matteorapposelli #mydoagency #goldcoast #australia #surf #ocean #surfing #PacificOcean #explore #adventure #australiasurf

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