Today's Message Index:
----------------------
1. 01:54 AM - Re: Reenforcement of baggage bays (craig bastin)
2. 06:50 AM - Re: Reenforcement of baggage bays (Rick Stockton)
3. 12:24 PM - Re: Reenforcement of baggage bays (Rowland Carson)
4. 01:14 PM - Re: Reenforcement of baggage bays (D Wysong)
Message 1
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| Subject: | Reenforcement of baggage bays |
I did Mine by doing the cloth wet out on plastic sheet and then transfered
it to the tubs, cutting and trimming to get a good fit, one face at a time,
and then
the bottom last, with about a 50mm overlap I did the ply wood the same way
and then carefully stuffed it all with plastic shopping bags to keep some
pressure on the layups in the really tight corners the bags dont stick and
can be easily removed after care, this gave me a nice finish that almost
looks like its been vaccum bagged
-----Original Message-----
From: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com]On Behalf Of Rick Stockton
Sent: Sunday, 13 July 2008 6:00 AM
To: europa-list@matronics.com
Subject: Europa-List: Reenforcement of baggage bays
I just started chapter 29 for the tri gear. On page 29-2 Issue 3. It
states to lay up two plies of "bid" at 45 degrees over the entire are up to
the top level of the central tunnel.
I just did one ply and it was the most difficult lay up so far. There are
no measuremnts given and the cloth folds onto its self while I tried to do
the lay up.
It seems the there should be a better way of doing this lay-up. Has
somebody come up with a good method? I looked at all the pictures, but
they only show the finished product.
Message 2
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| Subject: | Reenforcement of baggage bays |
Thanks, Graig, but I was writing about the very first lay up. The bid in the
box. I did one by trying to lay it up with one big sheet of bid. Because the
bid is a flat sheet it took some doing to get it in the form of the box. I
had to cut the four corners. I then lay out the two sheet on a wax paper design.
I then put this into the other baggage compartment. It quickly became a
big mess. I know I have some air bubbles, but I could not work them out.
I'm thinking that I need to cut the bid into three pieces. One long piece from
the tunnel to the fuselage side then the front piece and back piece.
craig bastin <craigb@onthenet.com.au> wrote:
I did Mine by doing the cloth wet out on plastic sheet and then transfered
it to the tubs, cutting and trimming to get a good fit, one face at a time,
and then
the bottom last, with about a 50mm overlap I did the ply wood the same way and
then carefully stuffed it all with plastic shopping bags to keep some pressure
on the layups in the really tight corners the bags dont stick and can be easily
removed after care, this gave me a nice finish that almost looks like its
been vaccum bagged
-----Original Message-----
From: owner-europa-list-server@matronics.com [mailto:owner-europa-list-server@matronics.com]On Behalf Of Rick Stockton
Sent: Sunday, 13 July 2008 6:00 AM
Subject: Europa-List: Reenforcement of baggage bays
I just started chapter 29 for the tri gear. On page 29-2 Issue 3. It states
to lay up two plies of "bid" at 45 degrees over the entire are up to the top
level of the central tunnel.
I just did one ply and it was the most difficult lay up so far. There are no
measuremnts given and the cloth folds onto its self while I tried to do the lay
up.
It seems the there should be a better way of doing this lay-up. Has somebody
come up with a good method? I looked at all the pictures, but they only show
the finished product.
href="http://www.matronics.com/Navigator?Europa-List">http://www.matronhref="http://forums.matronics.com">http://forums.matronics.com href="http://www.matronics.com/contribution">http://www.matronics.com/c
Message 3
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| Subject: | Reenforcement of baggage bays |
At 2008-07-13 06:45 -0700 Rick Stockton wrote:
>I'm thinking that I need to cut the bid into three pieces
Rick - as a monowheel builder I'm not familiar with this tri-gear
part of the build. However, alarm bells start to ring when I think
about cutting a re-inforcing item into pieces.
Graham Singleton or others with wider knowledge will correct me, but
I'm sure you need to consider the potential weakness introduced by
cutting the glass before layup. It may be possible to recover the
lost strength by edge overlaps of the glass plies, but I'm not
qualified to say where or how much.
regards
Rowland
--
| Rowland Carson LAA #16532 http://home.clara.net/rowil/aviation/
| 1030 hours building Europa #435 G-ROWI e-mail <rowil@clara.net>
Message 4
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| Subject: | Re: Reenforcement of baggage bays |
> I just did one ply and it was the most difficult lay up so far. There are no
> measuremnts given and the cloth folds onto its self while I tried to do the lay
> up.
>
> It seems the there should be a better way of doing this lay-up. Has somebody
> come up with a good method? I looked at all the pictures, but they only show
> the finished product.
Hello Rick,
A trick I use on hard-to-reach spots (LongEZ /canard builder) is to
make "poor man's prepreg" with the BID. It might work well for you.
First, make a pattern for the layup using a piece of drop cloth
plastic. I use 2 mil plastic for my patterns but have seen folks use
4 mil. You can cram the plastic sheet into nooks/crannies and then
mark any creases with a Sharpie. Trim the excess with a pair of
scissors and you end up with a "paperdoll" pattern for your BID cloth.
Next, rough cut the BID cloth about 2" oversize relative to your
"paperdoll" pattern. Also, cut two more pieces of drop cloth plastic
a tad bit bigger than the BID.
Write "OUT" with your Sharpie marker one one of the big plastic sheets
and trace the "paperdoll" onto it. Place this piece face-down (i.e. -
with the "OUT" facing out) and lay your first BID ply on top at a 45
relative to the pattern. Wet out the first BID ply thoroughly and
follow it with the second BID ply. Once your plies are wet, put the
other sheet of plastic onto the top of the pile, making a sandwich of
wet BID between two sheets of drop cloth.
Use a squeegee (or Bondo spreader, thick postcard, tongue depressor,
rolling pin, etc.) to gently chase any air or excess epoxy to the
edges. Don't pull too much resin out but do your best to get rid of
any air bubbles. Using a hair dryer to gently warm the resin will get
it to flow better in cool weather.
Once you finish chasing air bubbles out, turn the whole sandwich over
so you can see your "OUT" plus the "paperdoll" pattern outline. Trim
the BID sandwich along the pattern lines with scissors, turn the
sandwich over again ("OUT" side down), and peel the top sheet of
plastic off of the sandwich.
Transfer the whole stack (BID, BID, "OUT" plastic) into the tunnel and
position/stipple/squeegee the layup in place. The plastic will help
keep the BID from folding back onto itself AND will keep you from
getting covered in epoxy. Once the BID is where you want it, peel the
"OUT" plastic off and stipple any stubborn spots. Add peel ply to the
edges if you want.
Good luck!
D
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