Seajet
...
Best of luck. I trust you'll let everyone know if it turns out to be a successful racing tactic for you.
You do know the U-Boats lost in the end, don't you ?!
End of chat.
Mumm 36 delaminates
- Thread starter Pantelis
- Start date
You do know the U-Boats lost in the end, don't you ?!
End of chat.
AngusMcDoon
Well-Known Member
It is possible to build lightweight foam cored hulls that last, but it is very expensive to do so. Vacuum bagging is one technique, but it is a messy time consuming skilled process. Consequently boats built this way cost big £$€.
dt4134
Well-Known Member
I know, I race on one that was built that way. It is not that extortionately expensive for the hull, certainly given the figures that were mentioned to me. The keel, rig, gear and sails etc. are a huge part of the cost of the finished item.
However, I'd be the first to admit that the hull of a Westerley tank is likely to last longer.
oldsaltoz
Well-Known Member
Looking at the u-tube clip I notice the layer of foam on the glass being pulled off is very thin, could it be that the foam is parting at the point the resin penetration ends?
Meaning this is quite normal and nothing is "wrong" with this hull.
If you cut through the glass and through the glued interface between glass and foam, the foam will allow you to peel the glass of.
Any comments?
Meaning this is quite normal and nothing is "wrong" with this hull.
If you cut through the glass and through the glued interface between glass and foam, the foam will allow you to peel the glass of.
Any comments?
Twister_Ken
Well-Known Member
Sort of agree with Oz - certainly I would have been far less cavalier about peeling off that skin, and would have wanted to investigate whether drilling a pattern of small holes and injecting epoxy might have recovered the situation.
30boat
N/A
I can't see the foam you mention.Is it between the laminate and balsa core?
dt4134
Well-Known Member
I'd be surprised if a Mumm 36 had a balsa core. The foam is the core.
30boat
N/A
I'm inclined to think the same although on the video the core looks a bit like balsa.It appears to me that the bond between core and skin is too week.I've repaired cored decks and hulls and even where polyester resins are used it's not possible to peel the laminate off in that way.
dt4134
Well-Known Member
It looks like foam to me. You can even see where someone has written on it.
I'd have said it was the bond between the skin & core too, but I found OldSaltOz's comments interesting. It's hard to tell with the quality of the video on YouTube.