MAIB report - RIBQUEST owners - Page 3

Rogue Wave · 04 January 2008, 03:21

agreed.

I trust self tappers with sikaflex.

I know good and bad ply and I'm also able to remember when you wouldn't buy a twisted bit of wood from a timber yard. They certainly don't make wood like they used to. Some pics would be good.

How did you fix gArfies trakta kab to your humber

jwalker · 04 January 2008, 12:33

Quote:

Originally Posted by Rogue Wave

I know good and bad ply and I'm also able to remember when you wouldn't buy a twisted bit of wood from a timber yard.

You must be older that I thought.

Quote:

They certainly don't make wood like they used to.

It's probably cos we're more aware of what we are doing to forests and, I guess, the length of time it takes for a big mahogany or teak tree to grow. The soft textured woods will be quick growing so more sustainable...or more likely, easier whacked down with a big chainsaw in the Amazon forest.

Quote:

How did you fix gArfies trakta kab to your humber

Garfie's cab is bolted through the hull. Brackets were welded to the stainless structure early on in the build.

Rogue Wave · 16 January 2008, 02:07

Quote:

Originally Posted by jwalker

.Garfie's cab is bolted through the hull. Brackets were welded to the stainless structure early on in the build.

I thought it might be

jwalker · 28 January 2008, 16:59

Quote:

Originally Posted by Rogue Wave

I know good and bad ply and I'm also able to remember when you wouldn't buy a twisted bit of wood from a timber yard. They certainly don't make wood like they used to.

Some pics would be good.

I've finally got around to it. A comparison of what I consider to be pretty good quality marine ply and some ply cut from my Humber a few years ago. Most of the commonly available marine ply is like the Humber ply. There's a wee test in the next post.

Matt · 28 January 2008, 17:02

How thick? 1"?

jwalker · 28 January 2008, 17:10

OK, for the self tapper doubters, here's proof of the effectiveness of selftappers. These are just 15mm long and fairly narrow gauge. The anvil is 1½cwt. The wood is an offcut from my transom which has been out in all weathers for 4 years and it's boggin wet but still OK.
The screws are nowhere near at their limit.

Quote:

I trust self tappers with sikaflex.

Stu, no sika required.

jwalker · 28 January 2008, 17:15

Quote:

Originally Posted by Matt

How thick? 1"?

Aye, I think it is. I'll go and measure it if you need to know.

Matt · 28 January 2008, 17:23

Nah, I was just counting the plies and comparing to the stuff I got from Robbins (since I was waxying lyrical about them in an earlier post)

jwalker · 28 January 2008, 17:28

Quote:

Originally Posted by Matt

..(since I was waxying lyrical about them in an earlier post)

Ok. Are you happy with that ply? What did it cost you for and 8x4?

Matt · 28 January 2008, 17:34

I got half a sheet of 1" Super Elite - and yeh, have been pleased with the quality. Prices, plies etc posted here:
http://www.robbins.co.uk/Pdf%20Files...plywoods_1.pdf

jwalker · 28 January 2008, 18:01

9D280 · 28 January 2008, 18:18

Jumping back to the screws for a minute, here's a couple of websites that will hopefully explain the the technology of "Thread forming" (to give them their proper name) screws. Self tappers are strictly a whole different ball game.....

http://www.emhart.com/products/pk/swage.asp
gives a pretty picture

http://www.theengineer.co.uk/Article...+fastening.htm
is more verbal, but gives you the picture.

Long & short of it is there's thread forms, and there's thread forms. What sticks like lue to plastic or metal may pull straight out of wood & vice versa.

I'l lleave you guys to carry on talking about the wood now.....