Search found 394 matches

by TomTom
Fri May 31, 2019 8:05 am
Forum: Resins, Fiberglass and Paint
Topic: SP 106 vs Ampreg 21 by Gurit
Replies: 12
Views: 295

Re: SP 106 vs Ampreg 21 by Gurit

Ok - so Ampreg 30 will replace Ampreg 21 ... better environmentally and health wise and more UV stable. Ampro will bow replace SP106 - that’s what I have been told https://www.gurit.com/-/media/Gurit/Datasheets/AMPRO-overview.pdf. The tech guy at Gurit was very helpful on the phone and he said the S...
by TomTom
Thu May 30, 2019 6:42 pm
Forum: Resins, Fiberglass and Paint
Topic: SP 106 vs Ampreg 21 by Gurit
Replies: 12
Views: 295

SP 106 vs Ampreg 21 by Gurit

Which of these two resins is more suited to this type of epoxy-wood composite boat building?

And what differences might one notice between different epoxies?
by TomTom
Wed May 08, 2019 12:18 pm
Forum: Power Boats
Topic: Air bubble clarity in fiberglasss
Replies: 22
Views: 453

Re: Air bubble clarity in fiberglasss

Mbiggerstaff in his Bertram 28 restoration boat 2 is where I got all the basic idea...

viewtopic.php?f=10&t=62291&hilit=bertra ... 80#p439348

I think Cabosil is a trade name for a type of fumed silica (like Hoover... but could be wrong!)...
by TomTom
Wed May 08, 2019 2:17 am
Forum: Power Boats
Topic: Panga 20 Build
Replies: 385
Views: 12310

Re: Panga 20 Build

I think u are making the right choice... you can always make a livewell that fits in place nicely later on ... or you can have one that is removable with straps or similar. But get to know your boat as it should be first. Many production boats use a cooler strapped in as a seat rather than a built i...
by TomTom
Wed May 08, 2019 2:12 am
Forum: Power Boats
Topic: Air bubble clarity in fiberglasss
Replies: 22
Views: 453

Re: Air bubble clarity in fiberglasss

If there is a big void you can let it get a bit tacky first; the - or if no noticeably big voids use a slurry as your first layer - before placing the cloth on this. Then wet out the cloth as normal with unmixed epoxy. If you are doing a few layers of cloth and u can see that some air gaps seem to b...
by TomTom
Tue May 07, 2019 6:19 pm
Forum: Power Boats
Topic: Air bubble clarity in fiberglasss
Replies: 22
Views: 453

Re: Air bubble clarity in fiberglasss

I have found that mixing epoxy with cabosil as FallGuy suggested - as your first layer befor putting down the glass - has been a very effective way to get a better laminate with less voids; even when you think you have wet out the glass properly, what happens is that it moves a little or as you work...
by TomTom
Tue May 07, 2019 3:26 am
Forum: Power Boats
Topic: Panga 20 Build
Replies: 385
Views: 12310

Re: Panga 20 Build

FD - your build looks great - I think you are going to have a beautiful boat, beautiful boat. At the risk of sounding presumptuous, but also as someone who has spent a lot of time putting way too much stuff into small boats, and learning that hard way that most often less is more... could I suggest ...
by TomTom
Mon May 06, 2019 4:30 am
Forum: Builder's Power Boats
Topic: C19 - Major Structural Issues Now Slowly Getting there - Stretching to 21 now!
Replies: 234
Views: 9245

Re: C19 - Major Structural Issues Now Slowly Getting there - Stretching to 21 now!

Thanks - it is actually quite confusing - I can get the straight edge to lay "straight" for about the rear 3.5 feet. But it rocks at this point and if I let it rock and lay towards the bow, there is about a 3/8" gap at the transom. The plywood you see was a "mold" to lay the straight edge against an...
by TomTom
Thu May 02, 2019 7:43 am
Forum: Builder's Power Boats
Topic: C19 - Major Structural Issues Now Slowly Getting there - Stretching to 21 now!
Replies: 234
Views: 9245

Re: C19 - Major Structural Issues Now Slowly Getting there - Stretching to 21 now!

Tom - for once you have lost me... I would agree if the issue was the other way around ... ie the transom was slightly above (with boat upside down) the line of the straight edge ... so in effect you have something a bit like a trim tab or a flap on an aircraft at the back. Mine drops the other way....
by TomTom
Thu May 02, 2019 1:13 am
Forum: Builder's Power Boats
Topic: C19 - Major Structural Issues Now Slowly Getting there - Stretching to 21 now!
Replies: 234
Views: 9245

Re: C19 - Major Structural Issues Now Slowly Getting there - Stretching to 21 now!

Thanks Tom - would be great if I could just leave it - but I don't really understand how it will help when I am on the plane?

I thought this sort of thing made it more likely for the boat to have a bow high attitude or more of a hump?

Its sort of doing the opposite of a chine flat isn't it?