Three Neat Tricks with Marine Cranes

[@skylerstevens8887]

Please do Icebreakers next!

[@kilianortmann9979]

That crane collapse on the Orion must have been so bittersweet for the engineers. Sure the hook failed, leading to massive destruction of the boom, but literally everything else worked as intended. I'm sure they knew it would, they did all the calculations after all, but an incident like this confirms it in a different way. During my lectures videos like this or case studies made the material stick. I always remember those first, when I need to do something I haven't done in a while, and then I know where to look for the additional information. Thanks as always for your videos.

[@lj8549]

Always a treat when I receive a notification for this channel. Brilliant stuff!

[@Pa4ko8]

Thank you for the great lesson.

[@mozismobile]

Thanks Nick, interesting as always.

[@japatechBR]

So interesting Tks & congrats

[@sergeysmirnov1062]

Indeed, as always a really informative video

[@akoponen]

Do cranes get stabilized to help counter the roll of the ship?

[@DatawaveMarineSolutions]

Yes, but it usually doesn't change the crane limits. A land crane placed on a barge will have its legs extended for crane stability. And a marine crane gets welded down to the ship, with a VERY secure connection. But in both cases, the crane quickly runs into limits with the boom. The boom structure can only handle a minor roll angle. It varies with the crane, but I have never seen a crane that can handle more than a 10 deg roll. Past those limits, the boom often buckles and collapses. So we still assume any limits on the crane roll are hard limits, regardless of how we mount the crane on the deck.

[@robertlackey7212]

Great video ! I have a question . Imagine you wanted to make a Ice rated ship powered by a Kawasaki gas turbine , and imagine that even though Kawasaki made ships , they had never made a ice rated ship , also imagine you are also considering a Finnish shipbuilder that has lots of experience making Ice rated ships but has never made a turbine powered ship . All else being equal , which shipbuilder would you choose ?

[@DatawaveMarineSolutions]

Just going on your information, I would personally choose the Finnish shipbuilder with experience in ice rated ships. Most of the gas turbines I see on ships are designed to be largely self-contained. The expertise is more in the engine design, not the installation. Yes, it still takes expertise to install the turbine, but that is more of a discrete step. Contrasting that, building an ice-classed ship is very integrated. Ice-class requires reinforced hull design, stronger rudder, stronger propeller, unique ballast systems, and possibly modified welding procedures to handle the colder water. Ice class requires more changes to the entire construction process, making that more critical for selecting the builder. But I have a few caveats with my opinion. 1.) This only considers what you said in the comment. There are other important factors like price, lead times, customer reviews, weight management plans, etc. 2.) My background is more focused on the ship design vs machinery side. A marine engineer may have the opposite opinion, stating that the turbine is the more critical option. If you want a more detailed review, this is a service I offer. We call it owner's rep. This includes reviewing shipyards to ask the right questions. And then providing a rational comparison between the options. If you are interested, you can contact me on my email: [e-mail]

[@robertlackey7212]

@@DatawaveMarineSolutions I know how difficult designing the integration between a very high speed turbine (22,000 rpm) and a slow large marine propeller so it works reliably for decades is , and it is considerable ! I am pretty clueless about what is involved in making a ice rated ship , but from your answer it also sounds considerable. My gut feeling would be to pretty much go with the best builder for the job and try to forget about price and lead time. but then I come from a background of working on boats , not finance.

[@k9killer221]

@@DatawaveMarineSolutions Sorry, I'm an engineer and I have to say the opposite. Ice class is mainly just a strengthening exercise and easy to model. Installing a turbine over say piston engines is huge. All the plumbing, air intakes (massive), exhaust (massive) , special control systems, huge reductions in rotating speed (gearboxes) and cooling is a major exercise in design. And you only need to screw up just one of those things and you have an epic problem.

[@NT-ds8ic]

My friend, the subject is good but the explanation with a mouse is not good. You should have a model ship when explaining such subjects. Or explanation by drawing on a board or explanation with photos. So this video is not professional. Just talking.