Quick test of a tiny QEV cannon firing air at 12atm, viewed through a Schlieren setup (no razor blade). 1/8th speed (15fps) and improved video performance because somehow Youtube cropped the last frames of the other videos (?) 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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Hobie Cat F-18 team riders Greg Thomas and Jacques Bernier lay down tracks en route to a West Coast Championship win at the Sperry Top-Sider San Francisco NOOD.

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We took a day and toured the sunken boats of Lake Mead! Thanks so much for watching 🙏 Stay tuned as next Friday 12PM EST we release a new video 🎥 We do our best to keep you entertained and informed and if you find it fun, enjoyable or informative, consider becoming part of our team and ➡️ join us on Patreon: https://www.patreon.com/svaquarius ➡️ want to support us, but not sure about long term commitment? Make a one time donation on PayPal: https://bit.ly/3bEO59t More about us: https://www.sailingaquarius.com/ Our boat tour video: https://youtu.be/Ey1FX9icWv8 YouTube is our main focus, but on Instagram or Facebook we post more frequent updates: Facebook: http://www.facebook.com/SailingAquarius/ Instagram: http://www.instagram.com/sailingaquarius/ #sailingaquarius

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FOLLOW US --------------------------------------------------- Facebook: https://www.facebook.com/profile.php?id=61559312643639 Instagram: https://www.instagram.com/svutopia/ Pinterest: https://www.pinterest.com/svutopia/ About the Utopia: The historic Great Lakes schooner Utopia, built in 1946, offers a fascinating glimpse into maritime history. Originally from Sturgeon Bay, you can now find Utopia in Manitowoc, Wisconsin! Dockside visitors can explore this beautifully crafted vessel, which was designed by Fred J. Peterson of Peterson Builders, Inc. in Sturgeon Bay, Wisconsin and built in 1946. Utopia’s unique features include a steel double bottom for strength, wooden hull sides for warmth, and twin Detroit diesel engines. Visitors can marvel at her elegant lines, learn about her global circumnavigation, and appreciate the craftsmanship that has kept her sailing for decades. Utopia currently resides under the stewardship of the her new owners based in Manitowoc Wisconsin, where it continues to inspire curiosity and passion for the Great Lakes among learners of all ages.

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