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!!

0

0

0

62

Jag såg denna leksak på Röda Korsets second hand 7 maj 2024.

0

0

0

121

0

0

0

0

4,924

Nature’s Fury: Sailing Through the Ice and Thunder! ❄️⚡ ​#StormSurvivor #SeaAdventure #NatureFury #EpicMoments #ViralVideo #SailingLife #OceanBattle #Thunderstorm #Iceberg

0

0

0

0

Are you new to sailing and unsure about all those flags flying from boats? 🚩 In this beginner-friendly video, we break down what courtesy flags are, why they matter, and where to fly them when sailing into a new country. ✨ Knowing how to display your flags properly can help you avoid awkward encounters, embarrassment, and even fines! Whether you're a weekend cruiser or starting your liveaboard journey, this sailing etiquette tip is a must-know. 👇 Pin this for your next passage! 🔗 Check local flag regulations by country: https://www.noonsite.com/courtesy-flags/ Link to the full Flag Etiquette tutorial: https://youtu.be/Qf1q1Gex-2M #sailing #beginnerSailor #boatlife #courtesyflags #sailingtips #sailingetiquette

0

0

0

1,964