Today's Message Index:
----------------------
1. 01:24 AM - Re: Bending Wood - was Lower longerons (Clif Dawson)
2. 04:24 AM - Longerons (TBYH@aol.com)
3. 05:15 AM - Re: leading edge (Rcaprd@aol.com)
4. 07:59 AM - how many yards of covering? (DJ Vegh)
5. 02:33 PM - Re: how many yards of covering? (DJ Vegh)
6. 04:02 PM - Re: how many yards of covering? (Bert Conoly)
7. 05:35 PM - Re: how many yards of covering? (Richard Navratil)
8. 05:40 PM - prop - ground clearance (Richard Navratil)
9. 06:12 PM - Re: how many yards of covering? (walt evans)
10. 07:39 PM - Re: how many yards of covering? (DJ Vegh)
11. 07:42 PM - Re: how many yards of covering? (jimboyer@direcway.com)
12. 08:28 PM - Re: leading edge (Gary Gower)
13. 09:06 PM - Re: how many yards of covering? (DJ Vegh)
Message 1
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| Subject: | Re: Bending Wood - was Lower longerons |
I'll second this. The fuselage bend is not at all severe and shouldn't be
any trouble so long as you take it slowly. I would recomend the grain
be perpendicular to the table. The grain has more give in this direction.
The grain is actually layers the same as if you laminated and glued
your own layers together. The tree builds a new layer every year and
glues it to the existing layers with a thermoplastic "glue" called lignin.
This is extremely simplified. It's a lot more complicated than that but
essentialy the case. Also, if you can, make the longerons at least 6"
longer than the fuselage and begin the bend that far ahead of the
firewall crossmember. As mentioned before, use a number of blocks
screwed to the table to bend the longeron around, not just one or two.
The wood bends in a parabolic curve, severe in the center and almost
straight near the ends of the bend.
If you do decide to steam anything make sure the jig is ready to go
and close to the steamer. Once out of the steam you only have seconds
before the lignin begins to reharden.
Clif
Subject: Pietenpol-List: Bending Wood - was Lower longerons
Hi. I have to weight in my two cents worth.
Before I entered the world of aircraft building, I was heavily involved in musical instrument construction. ( http://www.donsplans.com ) Actually, there are a LOT of similarities, but I'll cut the the chase. I have bent a LOT of wood.
First, if you can bend the longerons without them cracking, this is fine. If
you take apart a 100 year old violin and try to straighten the sides, the sides
will crack! The wood will gradually conform to the new line. If you feel
that the strain is too much on the bend, moisture and heat will help. Your idea
of a long pipe is a good one. If you do this, I would boil the longerons
in water for at least 3 or 4 hours, and 5 or 6 would not be bad. Then, take out
the longerons, and immediately place it into the jig while it is still hot.
Then, you will have let it dry. This will take at least a week or two. Remember
that the moisture saturated wood will not glue properly until it is back
to the same moisture content as the rest of the wood. It will also tend to shrink
as it dries, so make sure that it has the same basic moisture content as
the rest of the wood before you build, or your fuselage will develop and arched
back as the bottom longerons dry.
After you are done, the wood will be just as strong as if you had not done the
treatment. However, as you can tell by the previous details, it will be a rather
large endeavor. My final "advice" on the project is don't try to steam
the wood. Bend it slowly into your jig, and don't let the stress build up on
any one point of the spruce. If you are careful about your work, and the spruce
broke while it was being installed in the jig, then it was defective, and you
just possibly saved your life! Go get a clear 2x4, and cut a 1 inch square
longeron or 3 from it. Practice with these until you can feel when the wood
is about to crack.
-Don Morris
Message 2
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I placed the lower longeron in the jig last night, without steaming -- no
problem. I just wondered what the consensus was as I've never built a "really
big plane" before and just wondered about bending the wood. I then got three
uprights made, along with an exact match for the other fuselage side. The
"laser-guided" compound electric mitre saw that my wife got me last Christmas is
fantastic! (Yes, dear, I really do plan to use it for that cove molding for the
downstairs bathroom and our bedroom.) Mark the wood carefully, lay the laser
line on the mark and presto! Cuts the right angle at the right length. I can't
imagine doing the cuts by hand, but then again that's how BHP and everyone else
has done it over the years -- I feel guilty using this modern convenience --
although if BHP had had one, he probably would have used it!
Thanks again for advice! Have a great Sunday everyone -- I'll be in the
basement building an airplane (although I may surface once the Packers start)!
Fred B.
Message 3
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| Subject: | Re: leading edge |
--> Pietenpol-List message posted by: Rcaprd@aol.com
In a message dated 11/5/04 9:37:34 AM Central Standard Time,
carbarvo@knology.net writes:
<< Have you ever heard that BHP used old election posters for his leading
edge? Carl >>
I heard it was the cardboard from the old Quaker Oats cans. Although, he
probably did vote for Franklin Roosevelt !!
Chuck G.
Message 4
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| Subject: | how many yards of covering? |
about how many yards of covering does a Piet require?
DJ
_
Message 5
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| Subject: | Re: how many yards of covering? |
nevermind... I just went ahead and ordered 42 yds. I figure that ought do it.
I also bought all the chemicals to bring it up to the "silver" stage. Freakin
expensive! $1600 for fabric and chemicals. probably be another $1000 for color
coat.... sheeesh!
DJ
----- Original Message -----
From: DJ Vegh
To: pietenpol-list@matronics.com
Sent: Sunday, November 07, 2004 8:59 AM
Subject: Pietenpol-List: how many yards of covering?
about how many yards of covering does a Piet require?
DJ
_
Message 6
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| Subject: | Re: how many yards of covering? |
DJ: I wound up having to order about 5 yds on top of the initial order of 32 yds.
But I did the tail group 4 or 5 years earlier and I think I used about 5
yds then. I wound up with a small amount left over but had to do my center section
twice. So I think about40 to 42 should do you.
And Yup. It's quite pricey. Easy to spend $2000 on the cover .
Bert
----- Original Message -----
From: DJ Vegh
To: pietenpol-list@matronics.com
Sent: Sunday, November 07, 2004 5:32 PM
Subject: Re: Pietenpol-List: how many yards of covering?
nevermind... I just went ahead and ordered 42 yds. I figure that ought do it.
I also bought all the chemicals to bring it up to the "silver" stage. Freakin
expensive! $1600 for fabric and chemicals. probably be another $1000 for
color coat.... sheeesh!
DJ
----- Original Message -----
From: DJ Vegh
To: pietenpol-list@matronics.com
Sent: Sunday, November 07, 2004 8:59 AM
Subject: Pietenpol-List: how many yards of covering?
about how many yards of covering does a Piet require?
DJ
_
Message 7
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| Subject: | Re: how many yards of covering? |
Now you know why some of us went the Sherwin Williams route of painting.
Dick N.
----- Original Message -----
From: DJ Vegh
To: pietenpol-list@matronics.com
Sent: Sunday, November 07, 2004 4:32 PM
Subject: Re: Pietenpol-List: how many yards of covering?
nevermind... I just went ahead and ordered 42 yds. I figure that ought do it.
I also bought all the chemicals to bring it up to the "silver" stage. Freakin
expensive! $1600 for fabric and chemicals. probably be another $1000 for
color coat.... sheeesh!
DJ
----- Original Message -----
From: DJ Vegh
To: pietenpol-list@matronics.com
Sent: Sunday, November 07, 2004 8:59 AM
Subject: Pietenpol-List: how many yards of covering?
about how many yards of covering does a Piet require?
DJ
_
Message 8
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| Subject: | prop - ground clearance |
I have been told in the past the basic rule for prop ground clearance is 9 in.
Is this correct? Is that figure with tail up in parellel to ground? With my
new radial engine Piet, I may have to re-make the gear legs to get it that high.
Dick N.
Message 9
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| Subject: | Re: how many yards of covering? |
I just remember that I got the "cheap" fabric from AS&S for $3.10 per yard, and
used Poly Fiber for the paint process.
walt evans
NX140DL
----- Original Message -----
From: DJ Vegh
To: pietenpol-list@matronics.com
Sent: Sunday, November 07, 2004 5:32 PM
Subject: Re: Pietenpol-List: how many yards of covering?
nevermind... I just went ahead and ordered 42 yds. I figure that ought do it.
I also bought all the chemicals to bring it up to the "silver" stage. Freakin
expensive! $1600 for fabric and chemicals. probably be another $1000 for
color coat.... sheeesh!
DJ
----- Original Message -----
From: DJ Vegh
To: pietenpol-list@matronics.com
Sent: Sunday, November 07, 2004 8:59 AM
Subject: Pietenpol-List: how many yards of covering?
about how many yards of covering does a Piet require?
DJ
_
Message 10
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| Subject: | Re: how many yards of covering? |
that's exactly what I did too
----- Original Message -----
From: walt evans
To: pietenpol-list@matronics.com
Sent: Sunday, November 07, 2004 7:12 PM
Subject: Re: Pietenpol-List: how many yards of covering?
I just remember that I got the "cheap" fabric from AS&S for $3.10 per yard, and
used Poly Fiber for the paint process.
walt evans
NX140DL
----- Original Message -----
From: DJ Vegh
To: pietenpol-list@matronics.com
Sent: Sunday, November 07, 2004 5:32 PM
Subject: Re: Pietenpol-List: how many yards of covering?
nevermind... I just went ahead and ordered 42 yds. I figure that ought do
it.
I also bought all the chemicals to bring it up to the "silver" stage. Freakin
expensive! $1600 for fabric and chemicals. probably be another $1000 for
color coat.... sheeesh!
DJ
----- Original Message -----
From: DJ Vegh
To: pietenpol-list@matronics.com
Sent: Sunday, November 07, 2004 8:59 AM
Subject: Pietenpol-List: how many yards of covering?
about how many yards of covering does a Piet require?
DJ
_
Message 11
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| Subject: | Re: how many yards of covering? |
--> Pietenpol-List message posted by: jimboyer@direcway.com
DJ,
What fabric and what method are you using? Thanks, Jim
do not archive
----- Original Message -----
From: DJ Vegh <djv@imagedv.com>
Subject: Re: Pietenpol-List: how many yards of covering?
> nevermind... I just went ahead and ordered 42 yds. I figure that
> ought do it.
>
> I also bought all the chemicals to bring it up to the "silver"
> stage. Freakin expensive! $1600 for fabric and chemicals.
> probably be another $1000 for color coat.... sheeesh!
>
> DJ
>
> ----- Original Message -----
> From: DJ Vegh
> To: pietenpol-list@matronics.com
> Sent: Sunday, November 07, 2004 8:59 AM
> Subject: Pietenpol-List: how many yards of covering?
>
>
> about how many yards of covering does a Piet require?
>
> DJ
>
> _
Message 12
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| Subject: | Re: leading edge |
--> Pietenpol-List message posted by: Gary Gower <ggower_99@yahoo.com>
Hola Javier,
I am going to buy some 1/16" ply from Houston Area for a friend here n
Guadalajara that is building a Flying Flea, I have the address in my
office, I will phone you monday and we can buy all at the time and get
it here by a friend of mine...
Thank you very much for your visit to our Club's fly in, was great to
meet you in person and your wonderfull and supporting family, we all
enjoyed having you all here. Hope is the first of lots of fly ins
around here.
Saludos
Gary Gower.
--- Javier Cruz <javcr@prodigy.net.mx> wrote:
> --> Pietenpol-List message posted by: Javier Cruz
> <javcr@prodigy.net.mx>
>
> Thanks for your help Friends
> I will try to get 1/16 plywood here (Mexico), if not, i will call to
> Wicks ,
> maybe they can send the plywood cut for less expensive shipping. I
> have on
> hand some sheets of formica, but i don't know if it is enought hard
> for
> leading edge.
> Javier Cruz
>
>
>
>
>
>
>
>
>
>
>
>
>
__________________________________
www.yahoo.com
Message 13
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| Subject: | Re: how many yards of covering? |
--> Pietenpol-List message posted by: "DJ Vegh" <djv@imagedv.com>
using generic uncertified 2.7oz. Dacron and Polyfiber/Stits process.
Will be starting covering of the tail surfaces in the next week or 2
DJ
----- Original Message -----
From: <jimboyer@direcway.com>
Subject: Re: Pietenpol-List: how many yards of covering?
> --> Pietenpol-List message posted by: jimboyer@direcway.com
>
> DJ,
>
> What fabric and what method are you using? Thanks, Jim
>
> do not archive
>
>
> ----- Original Message -----
> From: DJ Vegh <djv@imagedv.com>
> Date: Sunday, November 7, 2004 2:32 pm
> Subject: Re: Pietenpol-List: how many yards of covering?
>
> > nevermind... I just went ahead and ordered 42 yds. I figure that
> > ought do it.
> >
> > I also bought all the chemicals to bring it up to the "silver"
> > stage. Freakin expensive! $1600 for fabric and chemicals.
> > probably be another $1000 for color coat.... sheeesh!
> >
> > DJ
> >
> > ----- Original Message -----
> > From: DJ Vegh
> > To: pietenpol-list@matronics.com
> > Sent: Sunday, November 07, 2004 8:59 AM
> > Subject: Pietenpol-List: how many yards of covering?
> >
> >
> > about how many yards of covering does a Piet require?
> >
> > DJ
> >
> > _
>
>
>
>
>
>
>
>
>
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