Actually John, the difference between E glass and S glass has nothing to
do with the weave style.
E stands for "Electrical" grade and has a glass filament offering good
tensile and compressive strength but relatively poor impact strength.
This is the type most commonly used for homebuilds and marine
applications - and is the glass supplied by Europa.
"S" Glass was originally developed in the 1950s with a different
chemical composition and a filament diameter about half that of "E"
glass - giving a far greater wetted area.
This results in improved interlaminar, compressive and tensile strength
for a similar density. It is a much stronger reinforcement, approaching
that of carbon fibre, but the down side is it costs more (over double).
"In Europe, a third composition is available - "R" Glass. This is almost
identical to the "S" glass available in the US.
"E" glass is more vulnerable to attack by moisture than either "S" or
"R" and for this reason the latter is usually specified for highly
stressed and competition marine applications.
All these materials can be woven into virtually any style and sized to
suit the intended resin system, either polyester or epoxy. If ordering
new glass cloth - check that it is sized for epoxy.
Hope this helps
Nigel
----- Original Message -----
From: <TELEDYNMCS@aol.com>
Subject: Europa-List: E glass tape
In a message dated 10/7/2004 2:59:21 AM Eastern Daylight Time,
europa-list-digest@matronics.com writes:
> Could you explain what "E" glass tape is please?
>
> and yes I would like to see one or perhaps two photos to me off list.
>
> J R (Bob) Gowing, UK Kit 327 in Oz working on adj seats after flaps in
> working condition.
>
Hi Bob,
"E" Glass is single weave with the fibers oriented at 90 degrees to each
other. When sandwiched with 'Bid it gives the part fibers which run at
45 and 90
degrees to each other. It's available in bolt sizing as well as tapes
---From ACS.
I bought a roll of 2" roll of the tape for experimentation purposes when
I
made my center console cover. The edges are woven so they don't unravel.
If you
wanted to beef up the edge of a part this is good stuff to do it with.
I'll
send you some pics off list.
Not to be confused with "S" glass which is a single weave oriented at 45
degrees. Tape rolls of S glass are also available from ACS, although
it's pricey.
I'm going to cover my seams on my wings and fuselage with S glass to
keep the
seam from showing through or cracking the paint later on.
Regards,
John Lawton
Dunlap, TN
A-245
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