Today's Message Index:
----------------------
1. 09:09 AM - Re: Pietenpol-List Digest: 15 Msgs - 12/09/05 (Tim Willis)
2. 09:09 AM - Re: Pietenpol-List Digest: 15 Msgs - 12/09/05 (Tim Willis)
3. 09:22 AM - wing root covering (Douwe Blumberg)
4. 10:00 AM - Re: wing root covering (w b evans)
5. 12:12 PM - Re: Re: Pietenpol-List Digest: 4 Msgs - 12/08/05(changed to "flying the piet") (del magsam)
6. 01:57 PM - Re: Re: Pietenpol-List Digest: 15 Msgs - 12/09/05 (Rick Holland)
7. 05:55 PM - blood pressure medication (Oscar Zuniga)
Message 1
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| Subject: | Re: Pietenpol-List Digest: 15 Msgs - 12/09/05 |
Pietenpol-List Digest List <pietenpol-list-digest@matronics.com>
Re: 3 ton press
I have not yet tried to make this part. However, I used to bend things at times
when I had a commercial machine shop two decades ago. I had a one-, three-,
and five-ton arbor press. A 3-ton press likely won't work too well, or a 5-ton,
either. You either need both pressure and impact, or a lot more pressure
alone. When I wanted something stout bent, I used a friend's 35 ton press.
It also had a bigger table to hold bigger parts than most arbor presses have,
and more travel on the press, so that sizable holding fixtures or dies could
be put into play.
Consider how commercial metal products are bent, either with 20 tons in a punch
press-- both impact and pressure-- or 200 tons or more in a hydraulic press.
What's more, these commercial stamping processes use mating dies to form the
part. The dies both capture the material and make the shape. The steel used
in these parts is mild steel, too, not springy 4130, so when it goes there,
it stays put.
In this regard, homemade dies can help. If you can easily build a concave metal
mandrel to match the O.D. of the tubing, you may be able to both force and
hold the material well enough to form it with a 3-ton press and a little hammer
work at the same time. Without machining capabilities for a mandrel, consider
using as a mandrel a set of cheap steel muffler clamps of an approximate diameter.
My own plan is first to use stuff I already have-- a vise, welding clamps, a
thick walled tube, and a hand sledge. If that doesn't work well, I will take
the sheet metal and my welding clamps and thick walled tube to a friendly local
muffler shop (not a chain store) and ask them to bend it in their presses.
Tim
---------------------------------
Message 2
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| Subject: | Re: Pietenpol-List Digest: 15 Msgs - 12/09/05 |
Pietenpol-List Digest List <pietenpol-list-digest@matronics.com>
Re: 3 ton press
I have not yet tried to make this part. However, I used to bend things at times
when I had a commercial machine shop two decades ago. I had a one-, three-,
and five-ton arbor press. A 3-ton press likely won't work too well, or a 5-ton,
either. You either need both pressure and impact, or a lot more pressure
alone. When I wanted something stout bent, I used a friend's 35 ton press.
It also had a bigger table to hold bigger parts than most arbor presses have,
and more travel on the press, so that sizable holding fixtures or dies could
be put into play.
Consider how commercial metal products are bent, either with 20 tons in a punch
press-- both impact and pressure-- or 200 tons or more in a hydraulic press.
What's more, these commercial stamping processes use mating dies to form the
part. The dies both capture the material and make the shape. The steel used
in these parts is mild steel, too, not springy 4130, so when it goes there,
it stays put.
In this regard, homemade dies can help. If you can easily build a concave metal
mandrel to match the O.D. of the tubing, you may be able to both force and
hold the material well enough to form it with a 3-ton press and a little hammer
work at the same time. Without machining capabilities for a mandrel, consider
using as a mandrel a set of cheap steel muffler clamps of an approximate diameter.
My own plan is first to use stuff I already have-- a vise, welding clamps, a
thick walled tube, and a hand sledge. If that doesn't work well, I will take
the sheet metal and my welding clamps and thick walled tube to a friendly local
muffler shop (not a chain store) and ask them to bend it in their presses.
Tim
---------------------------------
Message 3
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| Subject: | wing root covering |
Hi guys,
In my various reading about covering, it always tells how to cover the wing root
rib (the one that buts up to the center section). My question is, is it necessary
to cover this? with the gap fairings, no wind will get in there, and it
seems nice to be able to see in there.
Thanks,
Douwe
Message 4
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| Subject: | Re: wing root covering |
I don't think you're supposed to. My plans don't say to. You have to add the
plywood strip around the butt ribs so the taught fabric doesn't distort them.
This should be on your 3 piece wing plans.
walt evans
NX140DL
----- Original Message -----
From: Douwe Blumberg
To: pietenpolgroup
Sent: Saturday, December 10, 2005 11:36 AM
Subject: Pietenpol-List: wing root covering
Hi guys,
In my various reading about covering, it always tells how to cover the wing root
rib (the one that buts up to the center section). My question is, is it necessary
to cover this? with the gap fairings, no wind will get in there, and
it seems nice to be able to see in there.
Thanks,
Douwe
Message 5
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| Subject: | Re: Pietenpol-List Digest: 4 Msgs - 12/08/05(changed |
to "flying the piet")
Tim
I've watched piets fly in 25 knot winds, But understand that there is a lot of
wing for the weight, and like my old tcraft....a 10 knot wind felt like a tornado,
whereas I don't even know its blowing when I'm flying my sonex. Also....please
label your posts, If they just say "digest" I normally just delete it
before I read it.
Thanks
Del
Tim Willis <strategyguy536@yahoo.com> wrote:
Oscar,
. He had built, flown and then later, finally crashed a Piet on takeoff. He was
an experienced pilot and builder and had many hours in his RV that he had already
built. It had to be a terrible feeling.
Del-New Richmond, Wi
"farmerdel@rocketmail.com"
---------------------------------
Message 6
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| Subject: | Re: Pietenpol-List Digest: 15 Msgs - 12/09/05 |
Wow, a 200 ton press eh? Guess I didn't know my own strength when I bent
that 090 strap around a 7/16" piece of tubing. Thanks for the advice, I will
just keep squeezing with the vice and beating with the hammer. (Need the
exercise anyhow).
Rick Holland
On 12/10/05, Tim Willis <strategyguy536@yahoo.com> wrote:
>
>
> Re: 3 ton press
>
> I have not yet tried to make this part. However, I used to bend things at
> times when I had a commercial machine shop two decades ago. I had a one-,
> three-, and five-ton arbor press. A 3-ton press likely won't work too well,
> or a 5-ton, either. You either need both pressure and impact, or a lot more
> pressure alone. When I wanted something stout bent, I used a friend's 35
> ton press. It also had a bigger table to hold bigger parts than most arbor
> presses have, and more travel on the press, so that sizable holding fixtures
> or dies could be put into play.
>
> Consider how commercial metal products are bent, either with 20 tons in a
> punch press-- both impact and pressure-- or 200 tons or more in a hydraulic
> press. What's more, these commercial stamping processes use mating dies to
> form the part. The dies both capture the material and make the shape. The
> steel used in these parts is mild steel, too, not springy 4130, so when it
> goes there, it stays put.
>
> In this regard, homemade dies can help. If you can easily build a concave
> metal mandrel to match the O.D. of the tubing, you may be able to both
> force and hold the material well enough to form it with a 3-ton press and a
> little hammer work at the same time. Without machining capabilities for a
> mandrel, consider using as a mandrel a set of cheap steel muffler clamps of
> an approximate diameter.
>
> My own plan is first to use stuff I already have-- a vise, welding clamps,
> a thick walled tube, and a hand sledge. If that doesn't work well, I will
> take the sheet metal and my welding clamps and thick walled tube to a
> friendly local muffler shop (not a chain store) and ask them to bend it in
> their presses.
>
> Tim
>
> ------------------------------
>
>
--
Rick Holland
Message 7
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| Subject: | blood pressure medication |
--> Pietenpol-List message posted by: "Oscar Zuniga" <taildrags@hotmail.com>
Sheesh- I had no idea there was so much involved in this blood pressure
thing. In between medicals, my blood pressure was creeping up into the
border-hypertensive region so my personal physician put me on the minimal
dosage of Altace to control it. At my next medical, I reported the new
medication as well as the doctor visit, my AME requested copies of my
personal doc's file on me including my personal log of weekly BP readings
over several months (we have a clinic at work so I could easily check and
track it), he submitted it with my 3rd class stuff to Okie City, and that
was that. Third class issued, no questions, over a year ago.
This is the 21st century. We put men on the moon, GPS navigation in
everybody's pocket, and can fit a bunch of megabytes of data on a thing the
size of an old gum eraser. Blood pressure medication is not experimental,
nor is it (dare I say it?) rocket science. Old grandma FAA Aeromedical
needs to take some Geritol and get with the program, especially with
hundreds of thousands of baby boomers starting through the system with
plenty of disposable income and a hankering to fly.
Oscar Zuniga
San Antonio, TX
mailto: taildrags@hotmail.com
website at http://www.flysquirrel.net
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