[70521]
Well-Known Member
Silly me I got it wrong, of course hulls fall off keels....except wings don't fall off aeroplanes. Fuselages may fall off wings. Unless, of course, you think hulls fall off keels
123 page accident report on keel failure
- Thread starter BurnitBlue
- Start date
Sans Bateau
Well-Known Member
Sorry I have to explain, thats why the
(sarcastic) smiley was used. Keels rarely fall of do they? Come on someone, with more time than me, lets find a list of boats over the last, say, 10 years which have lost their keels.Keen_Ed
Well-Known Member
Don't really see why the failure of a very high tech experimental keel would make me worry about a production boat's keel. In the same way I don't have kittens about the car every time a F1 car breaks down.
30boat
N/A
That keel wasn't particularly hi tech or experimental for that matter.The boat was poorly built and the attachment of the keel to the hull was badly thought out,that's why it failed.
[70521]
Well-Known Member
True, but what is in a high tec boat/F1 car today will be in the production boats/cars that come off the production line in 5-10 years time. Hight Tec boats/F1 cars are engineering "test bed" so the reports on failures, in the longer term, are important.
Keen_Ed
Well-Known Member
Personally, I don't think production boats will have electron beam welded keels made of aerospace grade titanium in my lifetime. Or anybody's lifetime, come to that.
Keen_Ed
Well-Known Member
Safran's keel? Electron beam welded aerospace grade titanium? The only boat in the fleet with a keel of this type?
http://www.safran-sailingteam.com/the-boat/safran-s-technologies/the-new-keel-72/
What on earth _do_ you consider to actually be high tech for a keel?
Frogmogman
Well-Known Member
I doubt they're going to catch on then....
Tranona
Well-Known Member
That is the problem with all these "keel falling off" type posts. There is an assumption that they are all about the same problem, whereas they fall into different categories. This one is close(r) to cruising boats than some because the basic method of construction is similar to many quite normal cruising boats.
The basic failure was caused by the boat not being designed, nor built using the correct standard. To make matters worse, following the first lot of damage it was repaired (by students) on the basis that it was built to standard when it was blindingly obvious, given the keel had been removed that the hull was too thin. You could see that without removing the keel as there was no sign of any reinforcement along the centreline as required by the standard.
As already noted the report is a whitewash, with an emphasis on trying to show that the owners were not at fault. The actual technical analysis is OK, but is a bit of a smoke screen to hide the fact that any professional boat repairer would have realised the boat was deficient after the earlier damage and either refused to repair it or insisted on rebuilding the keel area to the ABS standard.
The basic failure was caused by the boat not being designed, nor built using the correct standard. To make matters worse, following the first lot of damage it was repaired (by students) on the basis that it was built to standard when it was blindingly obvious, given the keel had been removed that the hull was too thin. You could see that without removing the keel as there was no sign of any reinforcement along the centreline as required by the standard.
As already noted the report is a whitewash, with an emphasis on trying to show that the owners were not at fault. The actual technical analysis is OK, but is a bit of a smoke screen to hide the fact that any professional boat repairer would have realised the boat was deficient after the earlier damage and either refused to repair it or insisted on rebuilding the keel area to the ABS standard.
30boat
N/A
Sorry I thought we were talking about the Cynthia Woods keel.