[Riesiger Schiffskran bricht im Überseehafen Rostock bei Tests in sich zusammen]

I was talking about the anti-heel system not being designed to compensate for such events. [image] shipengr: That would mean the designers never considered the possibility of a rigging failure, or that the main boom could ever be in a position greater than 90-deg from horizontal? My question is…

[image] shipengr: My question is why would there not be a physical mechanical system in place to prevent the boom from passing over the straight up vertical point? Big seatbelt-type inertial lock on a guy rigged below the boom?

The reactionary list of the ship made the crane boom go beyond its working limits (vertical) not the loss off the load on the hook. Had they not prepared for that possibility to happen? Had not prepared for loss of hook load without putting crane into a perilous situation? Hook loads are lost for a …

[image] shipengr: My question is why would there not be a physical mechanical system in place to prevent the boom from passing over the straight up vertical point? Or instead of a physical mechanism a procedure in place that provides for the vessel to never roll crane boom past safe point at …

I haven’t seen anything stating the capacity of the anti-heel tanks, or any video showing the Orion 1 before taking any weight on the crane, but I would guess that they had pre-ballasted in other wing tanks to where the ship would be upright at about 1/3 to 1/2 load. (Guessing, since I don’t know th…

[image] ombugge: BTW: The boom is NOT designed to accept large bending forces. Yeah obviously. I didn’t say it could accept bending force, I said a lattice is very rigid under that vertical loading of the lift. And therefore the shock of release of the lift is more translated to the pedesta…

[image] shipengr: A vessel heeling to its new center of gravity upon loss of load on the opposite side of the vessel is a given. Since this is a possible and foreseeable situation, it just seems to me to be an unacceptable design shortcoming if this purpose-built vessel can’t accommodate that wi…

[image] coldduck: Many stability manuals and crane operations manuals warn of issues for loss of hook load. I thought this was interesting. It makes sense that the crane design should take into account sudden loss of load. The design of the crane obviously has to account for the load but …

[image] ombugge: Lifts over side of monohull crane vessels exceeding 5000 m.t. are extremely rare still. (That was what was planned here, although they never reached that weight) This vessel would have been the most capable heavy lift monohull vessel without the crane located roughly center l…

Orion 1 - Crane Failure - Rostock, Germany

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Kennebec_Captain Split this topic May 13, 2020, 10:28am 67

2 posts were merged into an existing topic: 5 inch 38 caliber gun

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Orion 1 - Crane Failure - Rostock, Germany

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