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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Magic Dolphin & Whale watching tour in Morro Jable. Have the chance to spot this beautiful animals in Fuerteventura with one of our sailing boat trips. #dolphinwatching #boat #nature #youtube #catamaran #vacation #canaryislands #youtubevideo #nationalgeographic 👉 www.magicandsailing.com 📱+34 630 975 023

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⚓ When wind meets wave, legends are born. A towering tallship slams into the sea’s fury — the bow cuts deep, spray erupts sky-high, and sails groan against the storm. 8 seconds of maritime power in slow motion. #TallshipAdventure #SailingLegends #OceanPower #WaveSmash #SailingDrama #EpicSeas #MaritimeHeritage #SeaSprayMagic #HistoricShips #SailingLife

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Wobbegong sharks are a highlight of any scuba diving liveaboard cruise to Raja Ampat in Indonesia. Usually they are found lying under coral heads or inside crevices. But sometimes you get lucky and they have found somewhere to rest, completely out in the open. This one was in a particularly funny position. It doesn't look so comfortable to us, what do you think?!

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Amazing April weather to do a boat trip on 09/04/16

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