Say what???

My boat has 3/4" of handlaid mat & woven roving above the waterline. No way
you'll see daylight. The 35s5 has less than that below the waterline.

35s5...French for Flimsy!

BTW- 1" thick below the waterline on my Nordica.

CM

"Capt. Rob" wrote in message
oups.com...
What scared me away is being able to
see daylight through the thin f'glass on the hull.


I can see daylight through the hull of just about any glass hull,
dopey...unless she's been painted with a lot of coats of awlgrip.
You sure know boats!

RB
35s5
NY

My boat has 3/4" of handlaid mat & woven roving above the waterline. No
way
you'll see daylight. The 35s5 has less than that below the waterline.



You can see bright sunlight through an inch of fiberglass, Mooron. I've
been aboard some old-time Albergs and such and you can see light. Means
nothing of course. You can also see light through bullet proof glass. I
helped install a radar on a Sweden last season....plenty of light
coming through the hull of the proven blue water sailor as well.
Vito is just an idiot and likes to prove it often.
1" thick was because no one knew how touch glass could be at that time.
My old Catalina also had some pretty thick sections. Nowadays they're
building thin strong hulls like mine and that's yet another reason why
my boat is the better sailor. Plus my boat doesn't rot inside like the
Nordica...don't make me post those pics of the Nordica frame rotting!

RB
35s5
NY

"Capt. Rob" wrote in message
ups.com...

You can see bright sunlight through an inch of fiberglass, Mooron. I've
been aboard some old-time Albergs and such and you can see light. Means
nothing of course. You can also see light through bullet proof glass. I
helped install a radar on a Sweden last season....plenty of light
coming through the hull of the proven blue water sailor as well.

That light coming through depends on the woven material. Fibreglass matt is
usually white, so it reflects all light. The reason light gets through is
because the weave has gaps in it. The reason there are gaps is that the
glass isn't laid up properly, it is stretched beyond specification.

Amen!

What scared me away is being able to
see daylight through the thin f'glass on the hull.


"Capt." Rob wrote
I can see daylight through the hull of just about any glass hull,
dopey...unless she's been painted with a lot of coats of awlgrip.
You sure know boats!


Capt.Mooron wrote:
Say what???

My boat has 3/4" of handlaid mat & woven roving above the waterline. No way
you'll see daylight.

Depends on the resin, how it was laid up, and whether or not
it's painted. Fiberglass is, after all, glass. I've seen
very well made structural panels of fiberglass (holding up a
roof over an industrial plant, one that had trucks driving
over it) that were about 2" ( 5 cm) thick, and were
translucent enough to spot the sun.

OTOH a layup that has milky resin, bubbles, impurities, etc
etc, will be less clear. Then again, some types of resin are
not clear... it's important to know what you're looking at,
specifically. But just because a fiberglass panel is "too
clear" doesn't mean it's flimsy.

You'll often hear talk about how older boats are built so
thick because "they didn't know how strong fiberglass is"
which is baloney. Back in the early 1950s, when the Navy
began buying fiberglass boats, they commissioned a series of
engineering studies of the material which (as gov't
research) became public domain. Anybody who bothered to look
it up could find out exactly the properties of several
different types of laminate.

And thick isn't necessarily strong, most resin is brittle.
To make fiberglass strong, you want a very high thread/resin
ratio and tight interstitial bonding (vacuum bagging helps
with both). A very thick fiberglass layup that used a lot of
random strand (matt or chopper gun), cheap cloth or no woven
roving at all, poor bonding, poorly catalyzed resin, etc
etc, can just about fall apart if you look at it funny.

Believe it or not, laminated wood is more reliable
structure... and people who should know say it takes less
maintenance. There have been some very fancy & fast boats
built of wood laminated over foam core... seems bizarre to
me, but it works!


.... The 35s5 has less than that below the waterline.

35s5...French for Flimsy!

I thought it was French for "extra garlic on my snails, please."



BTW- 1" thick below the waterline on my Nordica.

That's so the ice floes won't cut right thru. Helps keep out
the leapord seals & narwhals, too!


Fresh Breezes- Doug King

The reason light gets through is
because the weave has gaps in it. The reason there are gaps is that the

glass isn't laid up properly, it is stretched beyond specification.


So Sweden, Pearson, C&C, Catalina, Beneteau, Tartan, Vindo, Bristol and
Alberg all have hulls stretched beyond spec? And I do mean EVERY hull
because I can see light through portions of just about any boat's hull.
Again, the only hulls that I've ever seen to stop light were
awlgripped, wood or steel.

RB
35s5
NY

Bob Crantz wrote:
That light coming through depends on the woven material. Fibreglass matt is
usually white, so it reflects all light.

That's the wax holding it together.

.... The reason light gets through is
because the weave has gaps in it. The reason there are gaps is that the
glass isn't laid up properly, it is stretched beyond specification.


Maybe, maybe not. The ratings on fiberglass cloth tell how
long the component strands are.... longer is better of
course... cheap cloth or roving, such as used for auto-body
repairs, will be made up of a lot of short strands spun into
yarn to make up the weave, but it's not as strong as the
same weight of cloth with more continuous strand.

Very interesting stuff, I'm learning.

DSK

I've made aircraft radomes out of extremely high quality fibreglass. You
couldn't see through .05" of the stuff.

Amen!




"DSK" wrote in message
.. .
Bob Crantz wrote:
That light coming through depends on the woven material. Fibreglass matt
is usually white, so it reflects all light.

That's the wax holding it together.

.... The reason light gets through is because the weave has gaps in it.
The reason there are gaps is that the glass isn't laid up properly, it is
stretched beyond specification.


Maybe, maybe not. The ratings on fiberglass cloth tell how long the
component strands are.... longer is better of course... cheap cloth or
roving, such as used for auto-body repairs, will be made up of a lot of
short strands spun into yarn to make up the weave, but it's not as strong
as the same weight of cloth with more continuous strand.

Very interesting stuff, I'm learning.

DSK

Bob Crantz wrote:
I've made aircraft radomes out of extremely high quality fibreglass. You
couldn't see through .05" of the stuff.


If you could see thru it, it wouldn't be stealth technology,
would it??

DSK

I've made aircraft radomes out of extremely high quality fibreglass.
You
couldn't see through .05" of the stuff.


Please don't tell me my 35s5 hull is weaker than .05" radome
material!!!!


RB
35s5
NY

Of interest:

http://www3.interscience.wiley.com/c...TRY=1&SRETRY=0


http://oemagazine.com/fromTheMagazin.../testtalk.html


Amen!



"DSK" wrote in message
.. .
Bob Crantz wrote:
I've made aircraft radomes out of extremely high quality fibreglass. You
couldn't see through .05" of the stuff.


If you could see thru it, it wouldn't be stealth technology, would it??

DSK