Today's Message Index:
----------------------
1. 07:51 AM - Re: 3 years in the making (K5YAC)
2. 10:23 AM - Re: Elevator bell crank stremline tube size (Bill Church)
3. 11:26 AM - Re: Sky scout w/b (Dave Aldrich)
4. 01:16 PM - Re: Re: Elevator bell crank stremline tube size (Michael Perez)
5. 06:07 PM - Re: Re: Elevator bell crank stremline tube size (shad bell)
6. 06:46 PM - Re: Re: Elevator bell crank stremline tube size (Ben Charvet)
7. 06:46 PM - Re: Sky scout w/b (Dick N)
8. 06:46 PM - Sun n Fun (Dick N)
9. 07:00 PM - Re: Re: Elevator bell crank stremline tube size (Tim Willis)
10. 08:12 PM - Re: Re: Elevator bell crank stremline tube size (Michael Perez)
11. 08:25 PM - Re: Re: Elevator bell crank stremline tube size (Michael Perez)
12. 10:40 PM - Re: Sun n Fun (Rob Stapleton)
13. 11:52 PM - Re: Re: Elevator bell crank stremline tube size (Tim Willis)
Message 1
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| Subject: | Re: 3 years in the making |
Way to go John! A milestone for sure!
I am getting cabin fever down here. I was able to get into the hangar last Friday
to do some work on my cables, but this week they are calling for wind, snow
and highs in the teens. In addition to that, the stuff that I really need to
get done requires some glue, which I can't even attempt to do until it warms
up some. :-(
I guess I'll continue to look for metal working projects (control horns, hinges,
etc.) whenever I can stand to be in the hangar.
Thank goodness for all this global warming, eh?
Good deal on the progress!
--------
Mark - working on wings
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=280025#280025
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| Subject: | Re: Elevator bell crank stremline tube size |
Michael,
I haven't built this part yet, but I don't see why it would need to be streamline
tube. Plain ol' round tube with the ends "squished" should work just fine.
Flat steel would to be too heavy, since you'd need to have such a thick bar to
avoid flexing. The whole reason for streamlined tubing being streamlined is to
reduce wind resistance, which should NOT be an issue inside the fuselage. My
guess is that BHP just made use of offcuts that were on hand, since it's such
a short piece needed.
Bill C.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=280056#280056
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| Subject: | Re: Sky scout w/b |
In theory, a CG between 15-20" from the LE on a 5 ft (60 inch) wing
would give you a range of 25-33% Mean Aerodynamic Chord (MAC) and that
really is the critical number. Those numbers are a good range for
almost ANY aircraft unless flight tests allow for a larger range.
Message 4
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| Subject: | Re: Elevator bell crank stremline tube size |
Thank you Bill. I was thinking the same exact thing...using round. I was th
inking of using flat, then weld a "rib/spine" on it for the flexing, but th
at would be heavy and a lot of fooling around when using a tube is so easy.
--- On Mon, 1/4/10, Bill Church <billspiet@sympatico.ca> wrote:
From: Bill Church <billspiet@sympatico.ca>
Subject: Pietenpol-List: Re: Elevator bell crank stremline tube size
>
Michael,
I haven't built this part yet, but I don't see why it would need to be stre
amline tube. Plain ol' round tube with the ends "squished" should work just
fine. Flat steel would to be too heavy, since you'd need to have such a th
ick bar to avoid flexing. The whole reason for streamlined tubing being str
eamlined is to reduce wind resistance, which should NOT be an issue inside
the fuselage. My guess is that BHP just made use of offcuts that were on ha
nd, since it's such a short piece needed.
Bill C.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=280056#280056
le, List Admin.
Message 5
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| Subject: | Re: Elevator bell crank stremline tube size |
I think the streamlined tube is critical, the airfoil on it must be a naca
1414......just kidding around, round tube should work fine.- I believe da
d used a scrap from my Jungster project theat had a little rust on it, clea
ned it painted it and -wa la.- I don't know what size the plans call fo
r, but I would guess 3/4" round tube .049" wall thikness would be plenty st
rong enough.
-
Shad=0A=0A=0A
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| Subject: | Re: Elevator bell crank stremline tube size |
I went ahead and bought a short length of the specified airfoil tubing.
If you decide to use round tubing, be sure to select a diameter large
enough to accommodate the axle that has to go through it, without being
structurally weak. It could ruin your whole day if that thing failed.
Ben Charvet
>
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| Subject: | Re: Sky scout w/b |
Tom
Yes, for a lack of anything better to do on these cold winter nights I
am working on another project. I have a set of wing ribs, a jig fot the
tail feathers and am going thru left over parts from other projects. If
I can't find another project for the Sun n Fun tent, I will bring along
something to build. I am still hard at work mainly at completing the
Volmer Sportsman Amphib and only doing small stuff on the Sky Scout,
Dick N.
----- Original Message -----
From: TOM MICHELLE BRANT
To: pietenpol-list@matronics.com
Sent: Sunday, January 03, 2010 11:06 PM
Subject: RE: Pietenpol-List: Sky scout w/b
Dick - sorry to hijack your post here but have you started the scout
project now?
Tom B.
-------------------------------------------------------------------------
-----
From: horzpool@goldengate.net
To: pietenpol-list@matronics.com
Subject: Pietenpol-List: Sky scout w/b
Date: Sun, 3 Jan 2010 21:29:32 -0600
A question for Sky Scout builders. Does that model use the same
numbers, 15-20" aft LE of wing for CG range? I am building from the
Flying Glider Manual plans and havent seen that point discussed there.
Dick N.
st">http://www.matronics.com/Navigator?Pietenpol-List
onics.com
ww.matronics.com/contribution
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Now that we are past the first of the year and Sun n Fun is about 97
days away, it's time again for me to ask if anyone has a project they
would like to have jump started.
Several of us here on the list gather each year to demonstrate wood
building at the show. You would have help from several experienced
builders and take home parts that would leave you far ahead on your
building.
In the past, I have received big help with my projects. We built a
set of wings for Skip Gadd, a fuselage for Gardiner Mason and various
projects for others. I don't have anything definite yet for this year
and if you would like to make some big progress on your project in 1
week, contact me off list and I will fill you in on what to expect and
what you will need.
Dick N.
horzpool@goldengate.net
Message 9
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| Subject: | Re: Elevator bell crank stremline tube size |
Michael, I sent you a pic a while back, but no dimensions of my elevator idler
bellcrank.
In fact, I made it from streamline tubing, and would again, but its shape is no
longer "streamline." It started as streamline tubing 2.25" long axis with about
1.00" outside across. I squeezed it uniformly to make it 2.50" long and 0.75"
across. This made an oval tubing section about 4 inches tall.
Then I cut notches in the top and cross-drilled holes up there. Now bearing ends
can fit into those slots. At the top then, are the tubes from the yoke and
from the main elevator bellcrank. The bearings themselves are trapped by the
tubing, with a bolt through the tubing and the bearing center, as you might expect.
When all was done, I had room for the bearing ends inside the length of tubing,
with room to spare. At the base I have a piece of half-inch round tubing welded
going crossways, mounted between two ball bearings and heavy aluminum (extruded)
angles.
It is all very smooth and rigid. Corky told me to widen the footprint of this
apparatus and make it more rigid than his prototype, and I did. It is overkill,
but I like it.
I think Dick N. used a piece of rectangular tubing in the same way on one of his
Piets, and I would have too, if I had seen his design first and had the tubing
handy. As with much else on Piets, I used what I had, without cutting corners
on specs of materials, strength, or quality.
Tim in central TX
-----Original Message-----
From: Michael Perez
Sent: Jan 4, 2010 4:10 PM
Subject: Re: Pietenpol-List: Re: Elevator bell crank stremline tube size
Thank you Bill. I was thinking the same exact thing...using round. I was thinking
of using flat, then weld a "rib/spine" on it for the flexing, but that would
be heavy and a lot of fooling around when using a tube is so easy.
--- On Mon, 1/4/10, Bill Church <billspiet@sympatico.ca> wrote:
From: Bill Church <billspiet@sympatico.ca>
Subject: Pietenpol-List: Re: Elevator bell crank stremline tube size
Michael,
I haven't built this part yet, but I don't see why it would need to be streamline
tube. Plain ol' round tube with the ends "squished" should work just fine.
Flat steel would to be too heavy, since you'd need to have such a thick bar to
avoid flexing. The whole reason for streamlined tubing being streamlined is to
reduce wind resistance, which should NOT be an issue inside the fuselage. My
guess is that BHP just made use of offcuts that were on hand, since it's such
a short piece needed.
Bill C.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=280056#28005= - The Pietenpol-List Email Forum -
http://www.matronics.com/Na========================<BRONICS.COM -Matt Admin="========
Message 10
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| Subject: | Re: Elevator bell crank stremline tube size |
Thanks Tim. I get a lot of intell. sent my way and I don't remember seeing
your crank setup. If not too much trouble, would you mind sending pictures?
You can send the direct if you don't want to take up space here.
-
I have some really, really nice machined aluminum brackets for my torque tu
be for the control sticks. One on each end and one in the center that acts
as the "safety strap".- I planned on using these same brackets/bearings f
or the crank as well.
--- On Mon, 1/4/10, Tim Willis <timothywillis@earthlink.net> wrote:
From: Tim Willis <timothywillis@earthlink.net>
Subject: Re: Pietenpol-List: Re: Elevator bell crank stremline tube size
et>
Michael, I sent you a pic a while back, but no dimensions of my elevator id
ler bellcrank.-
In fact, I made it from streamline tubing, and would again, but its shape i
s no longer "streamline."- It started as streamline tubing 2.25" long axi
s with about 1.00" outside across.- I squeezed it uniformly to make it 2.
50" long and 0.75" across.- This made an oval tubing section about 4 inch
es tall.-
Then I cut notches in the top and cross-drilled holes up there.- Now bear
ing ends can fit into those slots.- At the top then, are the tubes from t
he yoke and from the main elevator bellcrank. The bearings themselves are t
rapped by the tubing, with a bolt through the tubing and the bearing center
, as you might expect.-
When all was done, I had room for the bearing ends inside the length of tub
ing, with room to spare.---At the base I have a piece of half-inch ro
und tubing welded going crossways, mounted between two ball bearings and he
avy aluminum (extruded) angles.-
It is all very smooth and rigid.- Corky told me to widen the footprint of
this apparatus and make it more rigid than his prototype, and I did.- It
is overkill, but I like it.
I think Dick N. used a piece of rectangular tubing in the same way on one o
f his Piets, and I would have too, if I had seen his design first and had t
he tubing handy.- As with much else on Piets, I used what I had, without
cutting corners on specs of materials, strength, or quality.
Tim in central TX
-----Original Message-----
From: Michael Perez
Sent: Jan 4, 2010 4:10 PM
Subject: Re: Pietenpol-List: Re: Elevator bell crank stremline tube size
Thank you Bill. I was thinking the same exact thing...using round. I was th
inking of using flat, then weld a "rib/spine" on it for the flexing, but th
at would be heavy and a lot of fooling around when using a tube is so easy.
--- On Mon, 1/4/10, Bill Church <billspiet@sympatico.ca> wrote:
From: Bill Church <billspiet@sympatico.ca>
Subject: Pietenpol-List: Re: Elevator bell crank stremline tube size
>
Michael,
I haven't built this part yet, but I don't see why it would need to be stre
amline tube. Plain ol' round tube with the ends "squished" should work just
fine. Flat steel would to be too heavy, since you'd need to have such a th
ick bar to avoid flexing. The whole reason for streamlined tubing being str
eamlined is to reduce wind resistance, which should NOT be an issue inside
the fuselage. My guess is that BHP just made use of offcuts that were on ha
nd, since it's such a short piece needed.
Bill C.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=280056#28005=- - -
- - - The Pietenpol-List Email Forum -
http://www.matronics.com/Na================
========<BRONICS.COM -Matt Admin="=======
=
le, List Admin.
Message 11
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| Subject: | Re: Elevator bell crank stremline tube size |
The tube that this "crank lever" welds too is 3/4" as per the plan. I guess
the round tube to make up the lever would need to be no smaller the 1". A
3/4" hole could be machined through it for the tube to slide into and welde
d. I would think that 1/8" on each side at the narrowest point would be eno
ugh to weld to and be strong for what it will be required to do. Any though
ts?
--- On Mon, 1/4/10, Ben Charvet <bcharvet@bellsouth.net> wrote:
From: Ben Charvet <bcharvet@bellsouth.net>
Subject: Re: Pietenpol-List: Re: Elevator bell crank stremline tube size
I went ahead and bought a short length of the specified airfoil tubing.-
If you decide to use round tubing, be sure to select a diameter large enoug
h to accommodate the axle that has to go through it, without being structur
ally weak.- It could ruin your whole day if that thing failed.
Ben Charvet
>
le, List Admin.
Message 12
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Nice, but I will have defer to the Russian expression: " God is high
above and the Czar is far, far, away" so am I in Anchorage, AK! Good
thought though!
RS
Rob Stapleton, Photojournalist
Anchorage, AK
(907) 230-9425
KL2AN
Skype:rob.stapleton.jr
-----Original Message-----
From: owner-pietenpol-list-server@matronics.com
[mailto:owner-pietenpol-list-server@matronics.com] On Behalf Of Dick N
Sent: Monday, January 04, 2010 4:58 PM
Subject: Pietenpol-List: Sun n Fun
Now that we are past the first of the year and Sun n Fun is about 97
days away, it's time again for me to ask if anyone has a project they
would like to have jump started.
Several of us here on the list gather each year to demonstrate wood
building at the show. You would have help from several experienced
builders and take home parts that would leave you far ahead on your
building.
In the past, I have received big help with my projects. We built a
set of wings for Skip Gadd, a fuselage for Gardiner Mason and various
projects for others. I don't have anything definite yet for this year
and if you would like to make some big progress on your project in 1
week, contact me off list and I will fill you in on what to expect and
what you will need.
Dick N.
horzpool@goldengate.net
Message 13
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| Subject: | Re: Elevator bell crank stremline tube size |
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