Monday, August 13, 2007

Yet another flaw in the design

So far, we have revealed that there were two design faults and one, what we would call, error in the in the design of the duff and offal chutes on the Gaul:
The principal design fault (for details, see this LINKED DOCUMENT and this VIDEO CLIP), related to the construction and arrangement of the chutes, meant that the non-return flaps in the duff and offal chutes on the vessel could have been opened by the action of the sea
The second design fault showed the possibility for the bolted assemblies of the non-return flaps to become twisted due to the force of the sea, and remain open thereafter (further details can be found at this LINK).
The design error described in our post of 26 June 2007 was a dimensioning mistake in the shipyard’s construction drawing which, in certain circumstances, could have caused the flap to jam in the open position, after having been opened under the action of the sea. (For further explanations please follow this LINK)
Now, we are presenting yet another design error (explained HERE): a miscalculation of the relative weights of the components of the chutes’ non return flaps, the consequence of which meant that a wave load of only 7.5 kg could have been enough to force them open.
It should be noted that the design of ‘non-return flaps’ within the duff and offal chutes should have enabled them to withstand the forces of the sea, close automatically and prevent water ingress. However, as a result of the inadequacies listed above, the action of the sea could have caused the flaps to fail in their main functions.
Thus, it is evident that the design of the Gaul’s chutes was vitiated by multiple flaws (and, we warn you, there is more to come) and that the unfortunate nature of these flaws was such that they augmented each other’s effects, rendering the vessel unacceptably vulnerable to flooding and capsizing.

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