Stehende Welle

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Physik, Stehende Welle in Luft, Kundtsches Rohr, Ton, Frequenz, phyphox

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Abruzzo Skipper è una dinamica Società di Charter Nautico. Le basi nautiche sono in Abruzzo (San Salvo -CH-) e in Molise (Campomarino -CB-). Organizza Tour giornalieri/plurigiornalieri/settimanali per le Isole Tremiti, Costa dei Trabocchi e Riserva Naturale di Punta Aderci, Gargano, Croazia e Montenegro con Catamarani/Yacht/Barche a Vela. Organizza Eventi a bordo, compleanni, addii al nubilato/celibato. Tutti i Tour sono All Inclusive con pranzi e cene a bordo. 🇬🇧 Abruzzo Skipper is a dynamic Nautical Charter Company. The nautical bases are in Abruzzo (San Salvo -CH-) and in Molise (Campomarino -CB-). Organize daily / multi-day / weekly tours for the Tremiti Islands,Costa dei Trabocchi and Natural Reserve of Punta Aderci, Gargano cost, Croatia, and Montenegro with Catamarans / Yachts / Sailing Boats. Organize onboard events, birthdays, hen / stag parties. All Tours are “All-Inclusive” with aperitifs, lunches/ dinners and drinks included on board. www.abruzzoskipper.com Contact us +39 0873 671503

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Catamarans are the perfect boats to dry out on a beach, or, as many do in tidal areas (including ourselves), use a half tide drying mooring. If the boat has daggerboards then sensibly the rudders should lift to avoid damage, especially if the tide/wind causes waves when refloating. I have used the method seen in this video for 40 years. Very simple and works easily. Please note that this boat is over 30 years old, and I had never tried to lift the rudders with one hand before! Hence the initial hesitation. They would lift more easily if the shafts were greased. A simple snap hook holds the rudder up. Some people use "dinghy style" lifting rudders but that means the blades stick out behind the boat, which has often led to breakages when in a crowded anchorage and unsuspecting dinghies pass in the night. This rudder system works exactly like a conventional semi-balanced rudder when it in the down position. And has the advantage that the whole rudder can be taken off the boat by simply undoing one bolt. And no shaft leaks either! The thin ropes led through blocks to a cleat on the tiller are connected to the outboard. So the engine turns with the rudders, significantly increasing manouverability! I write more about steering systems on my website, see here https://www.sailingcatamarans.com/index.php/19-faqs/sailing-and-performance-questions/109-which-steering-system-should-i-use