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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As you can see in the other video, at 13,7 knots, did some testing with the rpm's. We do now 17 knots.

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Die neue Sun Fast 30 OD im Test...

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In 1934, an extraordinary racing aircraft opened up new horizons: the Caudron-Renault Rafale. Today, this high-flying design inspires us once again to bring the sky to the road. Renault Rafale E-Tech hybrid, streamlined design, sculpted lines, solarbay® opacifying panoramic glass roof, openR link with Google built-in¹ and more than 50 available apps. Learn more about Renault Rafale E-Tech full hybrid 200 hp ⬇️ https://bit.ly/4bmnAzs Discover our full range of vehicles https://www.renault.ie/ Follow us on social media for even more exclusive content FB: / renaultireland X: https://x.com/renaultireland IG : / renault_ireland

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