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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🚨 FORT LENNOX ÎLE-AUX-NOIX 2022 : Voilier Belle Amie 1 visite site historique Québec ! Bataille 1759, bastions secrets, drone épique Richelieu. Pt 2 . 🌊 **Rejoins Voilier Belle Amie1 partout :** 📺 YouTube : https://www.youtube.com/c/voilierbelleamie1 📸 Instagram : https://www.instagram.com/voilierbelleamie1 🎵 TikTok : https://www.tiktok.com/@voilierbelleamie1 ⚓ Facebook : https://www.facebook.com/voilierbelleamie1 Pour encourager nos vidéos et l’entretien du voilier, vous pouvez passer par mon lien avant vos achats Amazon : https://www.amazon.ca/?tag=voilierbellea-20 Ça ne vous coûte rien de plus et ça m’aide à continuer à créer du contenu. #FortLennox #IleAuxNoix #VoilierBelleAmie1 #HistoireQuebec #RealCreator #VoileHistorique #RichelieuFort #Quebec1759 #DroneFortLennox #VoileQuebec #SailingHistory #QuebecHeritage #BastionsFort #VoileAventure #HistoireMilitaireQuebec

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Nel tragitto da Zapuntel a Ossero abbiamo incontrato molte barche a vela che, sfruttando il vento del momento, andavano con l'andatura cosiddetta di "bolina". La bolina è quella andatura che permette di risalire il vento, mantenendo un angolo tra i 60 e i 37 gradi, rispetto al vento reale. 21/08/23.

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