stress cracks

timboli · 24 January 2004, 13:25

Can anyone tell me what causes these,can they be repaired and what they could be indicative on a new boat?
I picked up a new humber assault last monday from hull in the rain,I used a new rollercoaster type trailer and winched it on from the cradle as advised.The boat has no consoles or outboard fitted,today is my first chance since monday to look it over in the daylight and clean off the road grime.I was somewhat surprised and worried to find a series of stress cracks just under the tube on one side about a foot long.
I understand they could be caused by a sharp and hefty bang,which I havent applied but if a lightly loaded boat on a trailer can develop these,what will happen when I use it with an outboard,in a chop.
What I am worried about more is whether it indicates a problem with the lay up.
All advice welcome!
I will call humber on monday but was trying to get a better idea of what I am talking about,and what if any remedial action is neccesary.

MeMe · 24 January 2004, 16:01

be the first to respond to this very interesting and IMO worrying question.

Come on Ribnet, lets have some constructive feedback on this one !

If it were me.....regardless of the advice you get on here, I'd be back to the manufacturer seeking some advice as it does not seem right to me.

Good luck.

ribraff · 24 January 2004, 17:09

It is possible that too big a wedge was driven in between the Hull and the Mold upon removal??? This would cause the Gel to crack in the radius of the flange. Is this where the stress crack has appeared on your boat?....... All the same, i would get straight on to them on Monday

gingercoastie · 24 January 2004, 17:29

I am sure that Humber will be more than willing to help you sort this problem out. I recieved a good deal of help to sort out a problem with my vhf, and they only fitted it and the problem was nothing to do with them.

timboli · 24 January 2004, 18:42

Yes,it is just below the flange,I have some experience of fibre glass yachts as I have a sailing boat with the odd stress crack,but its 27 years old so expected,I dont know if there is any way to repair them,my real worry is if there is a problem with the laminate,and does the crack let water into the laminateI,m not too concerned about one but I dont want any others appearing,anyway,I,ll call Sue at humber on monday and email her some photos,not too keen on driving back to hull from Southampton though...............

jwalker · 24 January 2004, 18:48

Maybe they dropped it or smashed into it with the forklift!

Anyway, go and wind them up.

gavin · 24 January 2004, 19:32

Last summer myself and Tim paid a visit to Redbay boats workshop, I was looking at quite a a large hull and surprised to see a spiderweb shape ( crack) or so I thought we looked at a couple of similar hulls out of the mold, all identical spidersweb designs and not a crack atall but a mold mark in exactly the same spot, nothing more than a mark repeated in the hulls cast from the same mold, but until I inspected other hulls in the shop I didnt relaize it was a mark but presumed it was a flaw or crack.

gavin · 24 January 2004, 19:37

Here is one crossing the Atlantic

The Jackeens · 24 January 2004, 19:52

Is that Enda's Boat?

Missus

Rogue Wave · 24 January 2004, 19:55

What is a vivacious young woman such as yourself doing at home surfing on a Saturday night. Surely the night life of Poole has something to offer you

The Jackeens · 24 January 2004, 20:02

Quote:

Originally posted by Rogue Wave
What is a vivacious young woman such as yourself

Craven flattery of a middle aged Missus will get you nowhere Waver...

Oh alright then, I'm talking to you again,
Missus

(Quite a few stress cracks & lines meself after your BBQ...)

Rogue Wave · 24 January 2004, 20:28

Result !

sorry mate I got you confused with the RMC

The Jackeens · 24 January 2004, 20:34

Hahaha

So you were just being leery...

Missus

Rogue Wave · 24 January 2004, 20:37

R U 2 boating tomorrow, shall we give that nice Timboli his thread back.

The Jackeens · 24 January 2004, 20:41

OK I'll go back where I belong...I was getting worried JK might get cross at threads bein dragged down...
You'll find me at home on the darkside where I can ruin yer posts...

Missus

ribraff · 24 January 2004, 21:23

I have seen the marks in molds printed into the gel-coat too so yes, this may be what you have on your humber, these marks usually come from twatting the mold too hard or with the wrong tools.

The Jackeens · 24 January 2004, 21:25

thank goodness I don't have to worry about the moderatin over here...sounds very dodgy to me..
Missus
(Promise I'm gone now...that just gave me a shock...)

gavin · 25 January 2004, 19:39

That is Endas boat

fatboy500 · 26 January 2004, 11:34

Getting back to the original thread,
I've just sold my Camel to a guy who was running a new 2003 8m Humber. The boat had to go back to have the transom strengthed after 3 months after it almost dropped off. The hull then developed 3 large cracks and I believe is now being written off. Drop me a pm if you want to get in touch with him.

timboli · 26 January 2004, 18:19

Thanks everyone,Humber were very helpful and will repair free of charge although unable to decide how it could have occurred,aparently the boat gets checked over 3 times before leaving the factory!
They are sure the crazing is superficial and so I,ll get them deal with another time as its a long drive to Hull and I,m keen to get the boat ready to launch,they have sent me a letter to this effect.