Quick test of a tiny QEV cannon firing air at 12atm, viewed through a Schlieren setup (no razor blade). Unedited at 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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I finally hit the 40’s club and have never felt better!

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Dreaming of Raja Ampat? Think turquoise waters, untouched coral reefs, and the feeling of being completely off the grid. 🌴🐠 Before you set sail, here are 3 things every explorer should know about traveling to Raja Ampat: 1️⃣ Best Time to Visit Raja Ampat The ideal season is October to April, when the seas are calm, the water is crystal-clear, and manta rays are often spotted. It’s also the perfect time for snorkeling, diving, and photography with golden sunsets and calmer skies. 2️⃣ What to Pack for Raja Ampat Life onboard a sailing expedition is simple, but a few essentials go a long way: ✔️ Reef-safe sunscreen 🌞 ✔️ Dry bag for your gear 💧 ✔️ Water shoes or sandals 🩴 ✔️ A journal or book for quiet island moments 📖 ✔️ Most importantly—your sense of wonder. 3️⃣ Why Sailing is the Best Way to Explore Raja Ampat This remote archipelago wasn’t made for roads, it was made for sails. Traveling by a traditional phinisi boat lets you access hidden lagoons, uninhabited beaches, and rich marine life that land-based travel simply can’t reach. With SeaTrek, this isn’t just a vacation, it’s a voyage of discovery. One that connects you to nature, local culture, and yourself. Are you ready to set sail into Raja Ampat’s wild beauty? 🌊 #RajaAmpat #SeaTrekExperience #SailingIndonesia #LifeOnBoard #EcoTravel #RajaAmpatDiving #SnorkelingRajaAmpat #SustainableTravel

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