hull repair

finished laying up inside more grinding outside next week we hope

 

Basic No Blush with fast winter cure will work fine in temps from about freezing to 50 degrees F. cost is $99 for 1.5 gal unit.

This epoxy with special winter cure was designed for winter boat building in New England in unheated spaces.

 

I would kill for flexible sander!!Argh...

Hi,

Im refiting 72 foot long yacht and I would love to know, if there is any flexible electric sander that can sand large curved area. Are there any? Or do I live in land of dreams?

 

There are sanders all shapes and sizes and yes there are long sanders and the will curve to the shape of the hull time to go looking and see what we can find
http://www.wyatt.co.nz/site/wyatt/files/downloads/RUPES_catalogue_2010_2011.pdf check the european sellers !

 

I would kill for flexible sander!!Argh...

Hey Tunnels,

Thanks for your reply and the catalogue. I will dig in and see if there is anything I can find.

The sanders looks great and they are made in Italy as far as I understand, so Italians got plenty of experience with yacht refit. There are also plenty of other great sander comapnies like Mirka (their Ceros particulary looks ok, 3M ect. you name it)

But! It still is not a flexible You know I spent countless night waked up and thinking. Why there is not a single electric sander, that would be able to sand large curved areas? Can you give me any leads? Is it too much of a tech problem to made some?

 

That was only one i could find in a couple of minutes But there are others just have to look and find them !!

 

trying to get to the outside when it warms up some ive been researching on ways to hold the glass up on the bottom im hoping someone can give me the best ways to do this thanks

 

Besides using your bald spot as a squeegee (my personal technique), the most common way is to wetout the area, where the cloth will live, let it setup and get tacky, then use this tackiness to hold the cloth up, while you wet it out with fresh goo.

 

finally got to the outside we are grinding alot of material espesially along the keel to get to good glass as much as a half inch or so im a little cocerned on building it back up should i still go with 1700 biax like 4 layers at a time i will try to post pics by thur or fri thanx

 

Assuming you roll and squeegee out the 17 ounce biax well, 4 layers will yield about an 1/8", maybe very slightly shy of this.

 

thanx par should i do 4 at atime let it kick then sand or keep going just as it kicks and i will get some pics up by weeks end thanx

 

some pics of damage not done grinding yet is it possible that the old polyester was not bonded good originally and how much damage would be ok to leave if any

 

All the glass has separated /delaminated !!!

By what i can see you have a masive delamination problem !!! all the loose and damaged glass has to be removed not just where it was hit !! its had one hell of a bang and has delaminated the glass layers all the way through over a really big area!! get a long thin knife blade and slide it into and between the layers and see how far it will go between !! you have only just started and the separation of the glass could have traveled a long way and i mean a looooong way !!and in all directions !!. The main problem could stems from the origanal repair not being done properly in the first place and if you do the same kind of a shoddy repair then the same thing will happen again in a very short time !! delamination travels and needs to be stopped or it could cause the whole bottom to be come soft and spongy and move up and down quite easy !! Once it starts to traavel and the bottom bedins to move then the glass separates and travels and theres nothing to stop it till it reachs a chine or the transom even ! yes at speed if the water get between the glass layers the water pressure will blow the layers completely apart like a big balloon !! then you will have a totall bottom re build !!
Its possible to rebuild even in that state of damage !
I have done a couple and if done properly will better than new !!keep us posted with pictures of what you find and how far you get !!pictures are our only reall link as to what is happening !!

You could need to roll the boat over completely up side down or up on one side !! so somethig else to think about !! make life easyer and the work goes quicker !! hanging on to a grinder for a long time is not easy

 

got all the loose stuff out just have to taper the edges we have places where we took at 3/4 of inch but we are down as much as we need i guess we will build it up 4 layers at atime staggering the sizes of the patches

 

we are also in a few spots down to the new glass we did on the inside