Here's a stunning video of the XSV20 'Safehaven' and the Interceptor 48 pilot 'Dalmore' during rough weather sea trials during the recent storm off the coast of Ireland.
Frank, the XSV20 remains a rad design. Somehow I want to call it stormbreaker. It is the immediate closest idea I have when I see this shape in motion.
@@yuris4489 я лично на рыбатском сейнере ССП 90 у Стороженского маяка попали в шторм с шести метровыми волнами. Мы шесть часов боролись с этими волнами чтоб уйти с Ладоги в Свирь. Если в те времена были бы камеры видо было бы покруче этого 👍⚓
so the "PILOT" boat doesn't have as many problems, is this due to it's weight in the front end? as opposed to the XSV20, where the bow of the boat is much lighter and the large swells take the boat backwards? Different Ballasts loading?
As it says along the bottom of the video, the XSV20 was holding position, probably with minimal throttle, whereas the Pilot boat was moving under power and kept going up over the swell of the wave crest. The XSV20 has a very low C.O.G and has foils between the two rear hulls which helps lift the bow to reduce hull friction at cruising speed. The twin hulls at the rear provide stability, while the single hull at the bow has a wave piercing design. This lets it maintain a higher speed in heavy seas, up to 45kts, something the Pilot boat can't do!
In a "real"North Sea storm the Intercepter would soon get ripped off everything above the hull. Big waves rolling straight across the the"main" deck. No wave breaker. Would not last long or it would simply flip back over going that high on the waves.....
I would rather be on franks boat, its built to go fast in heavy seas and crush records, Frank when are you going for the win ? this year 2019 or next year 2020? would love to crew a round the world trip with ya.... record breaking trip that is.
Dashew's FPB series is domestic (to the US anyway) and transatlantic, transpacific, and trans just about anything else; their trawlers though faster than most.
البوت هذا سريع وفي احتياطات أمنيه كثيره وخاصه في ارتفاع الموج ومن التحذيرات الهوائيه والموجه العالي والمفروض على خفر السواحل ان تعتني مثل هذه البنوتات السريعه والمحصنه ضد الموج العالي والتحذيرات الهوائيه
Louie Lambretta - wave piercing should alleviate vertical pitching head seas. Also the pilot boat is under power in the bit you refer to, whereas the cvs is not. These boats are built to safely power through seas rather than drive over the top. Terrific designs.
The advantages of the shorter boat are obvious. The extra length of the XSV20 simply provides surface area for the sea to throw the vessel around. Here in the Us the Coast Guard uses 42, 44, and 47 foot search and rescue boats. The 42 foot version can be used in shallow bar crossings when the 47 foot version cannot. All of them are self righting if they capsize. en.wikipedia.org/wiki/47-foot_Motor_Lifeboat
That Safehaven is nice, but they always seem to compare it to a much SMALLER Pilot or other boat. Look at the difference in length and width of the XSV. Of course it will do better. Not saying its not a great boat, but these are basically unfair comparisons.
The problem with the so called "Safehaven" is that it has too much displacement in the aft so it does not slip through the peak of the wawes and stops and gets thrown backwords.
This is a bad disign. A bow without enough floating power in the bow will be overrunned by every wave. This is just common knowledge and is also mentioned in the boek "Heavy weather sailing".
At0:02, 0:39 and 1:41, it is clear that the weight distribution relative to back lift in heavy seas favors the heavy pilot boat as it rides the oncoming wave so much better with the forward weight of the inboard engines and the transom buoyancy working well at such slow speed. With Thunder Child, it has got a good back lift for a good planing angle only at the higher speeds but at such a low speed with the little buoyancy at the back and the engines moved back, TC rears its nose a lot, too much to be honest. In fact, there are moments when the reverse is applied to reduce the relative attack speed of the incoming wave. (0:49) Ahead throttle is also applied at the crest of the wave (0:56). It is clear that with TC 2, one needs to keep on his toes, unlike the pilot boat which is far kinder and so much better for such sea conditions. TC would fail completely as a pilot boat and it is meant for fast passages doing 45 knots and not in such conditions. In such a condition, it is the center of " heavy" weight/mass relative to the center of buoyancy that counts, and the closer the hull is to the lower side of a hemisphere the more sea-kindly it is. With a narrowboat having long straight lines runs as TC, its characteristics to inclination vary a lot to waves attacking it at most angles including from the bows. A boat is only a compromise, and one has to select the primary requirements and accept less performance on the others. The pilot boat will stand no chance against TC on a relatively smooth surface. It seems that the 2 by 2 counter-rotating engines/ propellers combinations have been changed from the original launching choice. I prefer the counterrotating engines, two on the same side, and not two similar ones on the same side as originally launched. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-nd3oPz-vCLE.html ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-oc74CsDX5cc.html
JOHN SHOUREAS in Italy we say that the boat “straorza”. It luffs too much when the sea comes from stern. In the WWW1 a lot of torpedo ships are become wrecks in heavy seas for this kind of reason. It is incredible that Frank Kowalsky has succumbed to the temptation of fashion!
Много шума из ничего . Обычная лодка с большой килеватостью днища , при аналогичных размерах корпуса , не уступит в мореходности и скорости этому катомарану с волнорезом .
