Today's Message Index:
----------------------
1. 08:28 AM - Re: Corvair Piet Oil Cooler locations? (airlion)
2. 08:32 AM - Re: Happy New Year from The Cool Propeller Company (airlion)
3. 08:34 AM - Re: Bend in push pull tube (Steve Ruse)
4. 08:49 AM - Pietenpol Builder's Directory (Off Topic) (Glenn Thomas)
5. 09:11 AM - Re: Happy New Year from The Cool Propeller Company (Gary Boothe)
6. 09:23 AM - Re: Happy New Year from The Cool Propeller Company (amsafetyc@aol.com)
7. 09:46 AM - Re: Pietenpol Builder's Directory (Off Topic) (Jack)
8. 10:31 AM - Re: Pietenpol Builder's Directory (Off Topic) (K5YAC)
9. 10:52 AM - Re: Pietenpol Builder's Directory (Off Topic) (Glenn Thomas)
10. 11:33 AM - Re: Pietenpol Builder's Directory (Off Topic) (Ben Charvet)
11. 12:01 PM - Re: Pietenpol Builder's Directory (Off Topic) (K5YAC)
12. 12:12 PM - Re: Pietenpol Builder's Directory (Off Topic) (Glenn Thomas)
13. 01:11 PM - Re: Happy New Year from The Cool Propeller Company (Peter W Johnson)
14. 02:09 PM - Re: Happy New Year from The Cool Propeller Company (Gary Boothe)
15. 03:47 PM - Re: Bend in push pull tube (Michael Perez)
16. 04:49 PM - Re: Bend in push pull tube (Gary Boothe)
17. 05:23 PM - Making "Wire Edges" (Gary Boothe)
18. 05:24 PM - Re: Bend in push pull tube (VAHOWDY@aol.com)
19. 06:47 PM - Re: Bend in push pull tube (Michael Perez)
Message 1
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| Subject: | Re: Corvair Piet Oil Cooler locations? |
Thanks for the reply Shad. If I taxi onthe ground for about 30 minutes the oil
temp gets up to about 245 and then I shut down for a while. I too have a very
slow seep from the back of the oil pan. Happy New Year, Gardiner
________________________________
From: shad bell <aviatorbell@yahoo.com>
Sent: Fri, January 1, 2010 5:56:41 PM
Subject: Re: Pietenpol-List: Corvair Piet Oil Cooler locations?
I am not positive,(with out looking at the gauge in front of me), In flight in
85-90 degree weather it runs about 220-230 degrees, measured at the bottom of
the oil pan. Ground run temp is quite less, as I don't typically run more than
a 5 min warm up time. We use Shell Rotella T 15-40 and have no problems with
it. The only annoying issue we have is a very slow "seap" from the back of
the oil pan when the oil is warm and the airplane is in a 3 point stance. We
might have to take the pan off before next spring and put a new gasket on with
some permatex gasket sealer to stop the driping.
Hope this helps
Shad
--- On Fri, 1/1/10, airlion <airlion@bellsouth.net> wrote:
>From: airlion <airlion@bellsouth.net>
>Subject: Re: Pietenpol-List: Corvair Piet Oil Cooler locations?
>To: pietenpol-list@matronics.com
>Date: Friday, January 1, 2010, 9:32 AM
>
>
> >
>Shad, What temps are you getting on the ground and in flight? Gardiner Mason
>
>
________________________________
From: shad bell <aviatorbell@yahoo.com>
>To: pietenpol-list@matronics.com
>Sent: Thu, December 31, 2009 10:11:29 PM
>Subject: RE: Pietenpol-List: Corvair Piet Oil Cooler locations?
>
>
>NX92GB has the 12 plate corvair cooler mounted at the stock corvair location.
We originally had the 8? plate cooler and it ran a little to high on the oil
temp. No problems with the 12 plate cooler. Another thing to consider is where
you measure oil temp, you get drastic differences.
>>
>>Shad
>
>
>
>
>ollow target=_blank>www.aeroelectric.com
>/" rel=nofollow target=_blank>www.buildersbooks.com
>ofollow target=_blank>www.homebuilthelp.com
>w target=_blank>www.howtocrimp.com
>llow target=_blank>http://www.matronics.com/contribution
>" rel=nofollow target=_blank>http://www.matronics.com/Navigator?Pietenpol-Listet=_blank>http://forums.matronics.com
>
Message 2
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| Subject: | Re: Happy New Year from The Cool Propeller Company |
Great picture Gary. Do you have a way to adjust your wing back for weight a
nd ballance reasons? I had to move mine back 4 inches. Gardiner=0A=0A=0A=0A
=0A________________________________=0AFrom: Gary Boothe <gboothe5@comcast.n
et>=0ATo: pietenpol-list@matronics.com=0ASent: Fri, January 1, 2010 5:32:56
PM=0ASubject: Pietenpol-List: Happy New Year from The Cool Propeller Compa
ny=0A=0A =0AMany, many thanks to Dan Helsper and P.F. Beck!!=0A =0A =0AStar
ting next weekend is The Kitchen Remodelguess=0Athat=99ll sl
ow me down a bit=0A =0AGary Boothe=0ACool, Ca.=0APietenpol=0AWW Co
rvair Conversion, mounted=0ATail done, Fuselage on=0Agear=0A(16 ribs down
)
Message 3
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| Subject: | Re: Bend in push pull tube |
Another thing to consider is the effect of repeated bending on that push ro
d at the bend. =C2-Eventually that rod will weaken from fatigue. =C2-I
don't know enough to tell you how to calculate when it would fail from fat
igue, but eventually it probably would. =C2-It might be after 100hrs or
100,000hrs, I have no idea. =C2-It will depend on the bend angle, stick
forces, etc.
One elegant way to deal with this broblem is to put a bearing where you nee
d the bend and attach two pushrods to it, one on each side, so you have tra
nslational motion on the first pushrod, purely rotational motion around the
bearing, and then purely translational motion in a new direction via the
second pushrod. =C2-I don't know what that is called, but you see it a
lot on old warbirds, and you can change the direction of the pushrod to an
y angle you want with no concerns about durability.
Steve Ruse
Norman, OK
-- Sent from my Palm Pr=C4=93
David Paule wrote:
A bend will drastically reduce the compression strength of the push rod.
=C2-
The bend adds moment arm and then you have something called "beam-column
bending" which tends to greatly reduce the compression strength of a simple
column.
=C2-
For a particular case, you'd need to do some analysis. One of the better
references is by Bruhn, and a good technical library will have a copy. Othe
rwise
the ASM that I'd previously recommended will do fine, but it's a bit more
difficult to use.
=C2-
But you can always make one like that and give it a try on the ground. If
you can put your maximum strength on the stick without bending or collapsin
g the
tube, it's probably okay. Hint - don't try that on the real airplane. Try
it on
a mockpit with test hardware, not flight hardware.
=C2-
David Paule
=C2-
----- Original Message -----
From:
Michael Perez
Subject: Pietenpol-List: Bend in push
pull tube
To make my life easier, I would prefer to put a bend in my elevator
push/pull tube. About 3 or so inches from the pilot stick, I would
like
to put about a 30 deg. bend to straighten it out to go under the
seat.=C2- Is this a bad idea? Will this bend compromise the contr
ol
system? It seems more then strong enough for a Pietenpol, but I hav
e
been wrong before. Thanks.
Message 4
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| Subject: | Pietenpol Builder's Directory (Off Topic) |
A bunch of people have emailed me over the past year letting me know that the builders
directory on my site couldn't be updated. Another email came in this
morning so I took the 10 minutes that it required to make some changes ...and
it's working again. FYI
It's a helpful resource to find out who in your area is building a Pietenpol and
getting in touch with them.
http://www.flyingwood.com/Directory.asp
DO NOT ARCHIVE
--------
Glenn Thomas
N?????
http://www.flyingwood.com
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=279758#279758
Message 5
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| Subject: | Happy New Year from The Cool Propeller Company |
Gardiner,
It is set for 4" back, now. I have a little room to move forward, if
necessary, but I hope I don't have to. Those diagonal braces get their
fittings today. The upper fittings would need to be remade for any changes.
Gary Boothe
Cool, Ca.
Pietenpol
WW Corvair Conversion, mounted
Tail done, Fuselage on gear
(16 ribs down.)
_____
From: owner-pietenpol-list-server@matronics.com
[mailto:owner-pietenpol-list-server@matronics.com] On Behalf Of airlion
Sent: Saturday, January 02, 2010 8:32 AM
Subject: Re: Pietenpol-List: Happy New Year from The Cool Propeller Company
Great picture Gary. Do you have a way to adjust your wing back for weight
and ballance reasons? I had to move mine back 4 inches. Gardiner
_____
From: Gary Boothe <gboothe5@comcast.net>
Sent: Fri, January 1, 2010 5:32:56 PM
Subject: Pietenpol-List: Happy New Year from The Cool Propeller Company
Many, many thanks to Dan Helsper and P.F. Beck!!
Starting next weekend is The Kitchen Remodel.guess that'll slow me down a
bit.
Gary Boothe
Cool, Ca.
Pietenpol
WW Corvair Conversion, mounted
Tail done, Fuselage on gear
(16 ribs down.)
Message 6
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| Subject: | Re: Happy New Year from The Cool Propeller Company |
well I just did my update. Pretty easy and painless. now back to
buildapalooza the clock is ticking towards my completion date.
I just hads a visit from my tech counselor as the 2009 year end inspection
,
He seemed less happy this time. I suspect because I am using ideas that
were not his recommendation. But he's did not build a Piet, he built a
Mustang kit so I suspect there are few similarities. This is the same guy
who
told me to avoidd Stewart systems covering only to find out the word of
mouth
eval was from another builder that did a poor cover job with it. He also
told me that he wouldn't fly behind an inspected and rebuilt engine that
was
involved in a prop strike incident (tall grass).
Oh well to each his own I suppose.
John
Do not archive
In a message dated 1/2/2010 11:37:35 A.M. Eastern Standard Time,
airlion@bellsouth.net writes:
Great picture Gary. Do you have a way to adjust your wing back for weight
and ballance reasons? I had to move mine back 4 inches. Gardiner
____________________________________
From: Gary Boothe <gboothe5@comcast.net>
Sent: Fri, January 1, 2010 5:32:56 PM
Subject: Pietenpol-List: Happy New Year from The Cool Propeller Company
Many, many thanks to Dan Helsper and P.F. Beck!!
Starting next weekend is The Kitchen Remodelguess that=99l
l slow me down a
bit
Gary Boothe
Cool, Ca.
Pietenpol
WW Corvair Conversion, mounted
Tail done, Fuselage on gear
(16 ribs down)
Message 7
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| Subject: | Pietenpol Builder's Directory (Off Topic) |
Glenn,
A great resource, thanks!
Great 2010 to you!
Jack
DSM
Do not archive
Message 8
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| Subject: | Re: Pietenpol Builder's Directory (Off Topic) |
Thanks for fixing the site Glenn... I have been wanting to add myself for a while.
Quite a list of Pieters there.
Question... most of the list entries have a stock image (see below), but a few
(Jack Phillips, P.F. Beck, Jack Textor), have added a photo. Is it still possible
to do that? If so, how?
Thanks again!
--------
Mark - working on wings
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=279775#279775
Attachments:
http://forums.matronics.com//files/vectorpiet_147.gif
Message 9
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| Subject: | Re: Pietenpol Builder's Directory (Off Topic) |
Reason for the stock image... The site was made a week or so before the annual
Pietenpol gathering a few years ago so that people from the list could find each
other. This was back before Doc Mosher had resurrected the BPA and started
making nametags. Rather than have blank space I simply filled it in with the
stock image if you never sent me a photo.
If you or anybody wants their picture uploaded it's still a fairly manual process
and I haven't spent the time to make it self-service. If you send me a picture
you'd like to see with your directory entry as an email attachment, I'll
upload it to the site. It might not happen immediately, but I will try and load
it within a day or 2.
Thanks
DO NOT ARCHIVE
--------
Glenn Thomas
N?????
http://www.flyingwood.com
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=279779#279779
Message 10
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| Subject: | Re: Pietenpol Builder's Directory (Off Topic) |
Glenn Thomas wrote:
>
> A bunch of people have emailed me over the past year letting me know that the
builders directory on my site couldn't be updated. Another email came in this
morning so I took the 10 minutes that it required to make some changes ...and
it's working again. FYI
>
> It's a helpful resource to find out who in your area is building a Pietenpol
and getting in touch with them.
>
> http://www.flyingwood.com/Directory.asp
>
> DO NOT ARCHIVE
>
> --------
> Glenn Thomas
> N?????
> http://www.flyingwood.com
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=279758#279758
>
>
> Thanks, I updated my status. How do you post a picture?
>
Ben Charvet
>
>
>
Message 11
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| Subject: | Re: Pietenpol Builder's Directory (Off Topic) |
Glenn Thomas wrote:
> Reason for the stock image... The site was made a week or so before the annual
Pietenpol gathering a few years ago so that people from the list could find
each other. This was back before Doc Mosher had resurrected the BPA and started
making nametags. Rather than have blank space I simply filled it in with
the stock image if you never sent me a photo.
>
> If you or anybody wants their picture uploaded it's still a fairly manual process
and I haven't spent the time to make it self-service. If you send me a picture
you'd like to see with your directory entry as an email attachment, I'll
upload it to the site. It might not happen immediately, but I will try and
load it within a day or 2.
>
> Thanks
>
> DO NOT ARCHIVE
--------
Mark - working on wings
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=279787#279787
Message 12
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| Subject: | Re: Pietenpol Builder's Directory (Off Topic) |
If you'd like a picture in your directory listing just email it to glennthomas@flyingwood.com. I think Matronics automatically changes the "at" symbol to make the email unusable. You can fix it yourself or use the email link at the bottom of the home page of http://www.flyingwood.com
--------
Glenn Thomas
N?????
http://www.flyingwood.com
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=279788#279788
Message 13
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| Subject: | Happy New Year from The Cool Propeller Company |
Gary,
I made and installed my windscreens and cockpit covers before I did a weight
and balance (duh). After the weight & balance I made to move the wing back
and that necessitated new holes for the control cables and struts and I had
to relocate the windscreen. 4 inches sounds like a good start but a quick
weight and balance check before the windscreens and fuse covers go on is a
good idea.
Cheers
Peter
Wonthaggi Australia
http://www.cpc-world.com
From: owner-pietenpol-list-server@matronics.com
[mailto:owner-pietenpol-list-server@matronics.com] On Behalf Of Gary Boothe
Sent: Sunday, 3 January 2010 4:11 AM
Subject: RE: Pietenpol-List: Happy New Year from The Cool Propeller Company
Gardiner,
It is set for 4" back, now. I have a little room to move forward, if
necessary, but I hope I don't have to. Those diagonal braces get their
fittings today. The upper fittings would need to be remade for any changes.
Gary Boothe
Cool, Ca.
Pietenpol
WW Corvair Conversion, mounted
Tail done, Fuselage on gear
(16 ribs down.)
_____
From: owner-pietenpol-list-server@matronics.com
[mailto:owner-pietenpol-list-server@matronics.com] On Behalf Of airlion
Sent: Saturday, January 02, 2010 8:32 AM
Subject: Re: Pietenpol-List: Happy New Year from The Cool Propeller Company
Great picture Gary. Do you have a way to adjust your wing back for weight
and ballance reasons? I had to move mine back 4 inches. Gardiner
_____
From: Gary Boothe <gboothe5@comcast.net>
Sent: Fri, January 1, 2010 5:32:56 PM
Subject: Pietenpol-List: Happy New Year from The Cool Propeller Company
Many, many thanks to Dan Helsper and P.F. Beck!!
Starting next weekend is The Kitchen Remodel.guess that'll slow me down a
bit.
Gary Boothe
Cool, Ca.
Pietenpol
WW Corvair Conversion, mounted
Tail done, Fuselage on gear
(16 ribs down.)
Message 14
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| Subject: | Happy New Year from The Cool Propeller Company |
Good advice! Thanks Peter.
Gary Boothe
Cool, Ca.
Pietenpol
WW Corvair Conversion, mounted
Tail done, Fuselage on gear
(16 ribs down.)
_____
From: owner-pietenpol-list-server@matronics.com
[mailto:owner-pietenpol-list-server@matronics.com] On Behalf Of Peter W
Johnson
Sent: Saturday, January 02, 2010 1:10 PM
Subject: RE: Pietenpol-List: Happy New Year from The Cool Propeller Company
Gary,
I made and installed my windscreens and cockpit covers before I did a weight
and balance (duh). After the weight & balance I made to move the wing back
and that necessitated new holes for the control cables and struts and I had
to relocate the windscreen. 4 inches sounds like a good start but a quick
weight and balance check before the windscreens and fuse covers go on is a
good idea.
Cheers
Peter
Wonthaggi Australia
http://www.cpc-world.com
From: owner-pietenpol-list-server@matronics.com
[mailto:owner-pietenpol-list-server@matronics.com] On Behalf Of Gary Boothe
Sent: Sunday, 3 January 2010 4:11 AM
Subject: RE: Pietenpol-List: Happy New Year from The Cool Propeller Company
Gardiner,
It is set for 4" back, now. I have a little room to move forward, if
necessary, but I hope I don't have to. Those diagonal braces get their
fittings today. The upper fittings would need to be remade for any changes.
Gary Boothe
Cool, Ca.
Pietenpol
WW Corvair Conversion, mounted
Tail done, Fuselage on gear
(16 ribs down.)
_____
From: owner-pietenpol-list-server@matronics.com
[mailto:owner-pietenpol-list-server@matronics.com] On Behalf Of airlion
Sent: Saturday, January 02, 2010 8:32 AM
Subject: Re: Pietenpol-List: Happy New Year from The Cool Propeller Company
Great picture Gary. Do you have a way to adjust your wing back for weight
and ballance reasons? I had to move mine back 4 inches. Gardiner
_____
From: Gary Boothe <gboothe5@comcast.net>
Sent: Fri, January 1, 2010 5:32:56 PM
Subject: Pietenpol-List: Happy New Year from The Cool Propeller Company
Many, many thanks to Dan Helsper and P.F. Beck!!
Starting next weekend is The Kitchen Remodel.guess that'll slow me down a
bit.
Gary Boothe
Cool, Ca.
Pietenpol
WW Corvair Conversion, mounted
Tail done, Fuselage on gear
(16 ribs down.)
Message 15
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| Subject: | Re: Bend in push pull tube |
I was planning on doing the "typical" pivot/idler arm=C2-behind the seat,
but with my lowered seat bottom, that puts the arm under the seat and hang
ing below, past the bottom of the fuselage. I can get it figured out, what
I need to do is make/install the elevator bell crank in the fuselage and wo
rk=C2-towards the seat from the stick and the crank.
=C2-
=C2-
Steve, if you have a picture or drawing of the bearing deal you mentioned,
I would appreciate a look see.
--- On Sat, 1/2/10, Steve Ruse <steve@wotelectronics.com> wrote:
From: Steve Ruse <steve@wotelectronics.com>
Subject: Re: Pietenpol-List: Bend in push pull tube
Another thing to consider is the effect of repeated bending on that push ro
d at the bend. =C2-Eventually that rod will weaken from fatigue. =C2-I
don't know enough to tell you how to calculate when it would fail from fati
gue, but eventually it probably would. =C2-It might be after 100hrs or 10
0,000hrs, I have no idea. =C2-It will depend on the bend angle, stick for
ces, etc.
One elegant way to deal with this broblem is to put a bearing where you nee
d the bend and attach two pushrods to it, one on each side, so you have tra
nslational motion on the first pushrod, purely rotational motion around the
bearing, and then purely translational motion in a new direction via the s
econd pushrod. =C2-I don't know what that is called, but you see it a lot
on old warbirds, and you can change the direction of the pushrod to any an
gle you want with no concerns about durability.
Steve Ruse
Norman, OK
-- Sent from my Palm Pr=C4=93
David Paule wrote:
A bend will drastically reduce the compression strength of the push rod.
=C2-
The bend adds moment arm and then you have something called "beam-column be
nding" which tends to greatly reduce the compression strength of a simple c
olumn.
=C2-
For a particular case, you'd need to do some analysis. One of the better re
ferences is by Bruhn, and a good technical library will have a copy. Otherw
ise the ASM that I'd previously recommended will do fine, but it's a bit mo
re difficult to use.
=C2-
But you can always make one like that and give it a try on the ground. If y
ou can put your maximum strength on the stick without bending or collapsing
the tube, it's probably okay. Hint - don't try that on the real airplane.
Try it on a mockpit with test hardware, not flight hardware.
=C2-
David Paule
=C2-
----- Original Message -----
From: Michael Perez
Subject: Pietenpol-List: Bend in push pull tube
To make my life easier, I would prefer to put a bend in my elevator push/pu
ll tube. About 3 or so inches from the pilot stick, I would like to put abo
ut a 30 deg. bend to straighten it out to go under the seat.=C2- Is this
a bad idea? Will this bend compromise the control system? It seems more the
n strong enough for a Pietenpol, but I have been wrong before. Thanks.
ttp://www.matronics.com/Navigator?Pietenpol-List
com
tronics.com/contribution
Message 16
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| Subject: | Bend in push pull tube |
Michael,
Here are some pics of my idler arm. My seat bottom is framed per plans.
The
push/pull rod travels up and down at the idler arm, approximately
=BE=94.
Just a thought=85if you ran two stringers along the bottom of your fuse,
beyond the seat bottom, you could easily pick up another 1=94 of
clearance.
Gary Boothe
Cool, Ca.
Pietenpol
WW Corvair Conversion, mounted
Tail done, Fuselage on gear
(16 ribs down=85)
_____
From: owner-pietenpol-list-server@matronics.com
[mailto:owner-pietenpol-list-server@matronics.com] On Behalf Of Michael
Perez
Sent: Saturday, January 02, 2010 3:46 PM
Subject: Re: Pietenpol-List: Bend in push pull tube
I was planning on doing the "typical" pivot/idler arm behind the seat,
but
with my lowered seat bottom, that puts the arm under the seat and
hanging
below, past the bottom of the fuselage. I can get it figured out, what I
need to do is make/install the elevator bell crank in the fuselage and
work
towards the seat from the stick and the crank.
Steve, if you have a picture or drawing of the bearing deal you
mentioned, I
would appreciate a look see.
--- On Sat, 1/2/10, Steve Ruse <steve@wotelectronics.com> wrote:
From: Steve Ruse <steve@wotelectronics.com>
Subject: Re: Pietenpol-List: Bend in push pull tube
Another thing to consider is the effect of repeated bending on that push
rod
at the bend. Eventually that rod will weaken from fatigue. I don't
know
enough to tell you how to calculate when it would fail from fatigue, but
eventually it probably would. It might be after 100hrs or 100,000hrs, I
have no idea. It will depend on the bend angle, stick forces, etc.
One elegant way to deal with this broblem is to put a bearing where you
need
the bend and attach two pushrods to it, one on each side, so you have
translational motion on the first pushrod, purely rotational motion
around
the bearing, and then purely translational motion in a new direction via
the
second pushrod. I don't know what that is called, but you see it a lot
on
old warbirds, and you can change the direction of the pushrod to any
angle
you want with no concerns about durability.
Steve Ruse
Norman, OK
-- Sent from my Palm Pr=E7
_____
David Paule wrote:
A bend will drastically reduce the compression strength of the push rod.
The bend adds moment arm and then you have something called "beam-column
bending" which tends to greatly reduce the compression strength of a
simple
column.
For a particular case, you'd need to do some analysis. One of the better
references is by Bruhn, and a good technical library will have a copy.
Otherwise the ASM that I'd previously recommended will do fine, but it's
a
bit more difficult to use.
But you can always make one like that and give it a try on the ground.
If
you can put your maximum strength on the stick without bending or
collapsing
the tube, it's probably okay. Hint - don't try that on the real
airplane.
Try it on a mockpit with test hardware, not flight hardware.
David Paule
----- Original Message -----
From: Michael Perez
<http://us.mc833.mail.yahoo.com/mc/compose?to=speedbrake@sbcglobalnet>
Subject: Pietenpol-List: Bend in push pull tube
To make my life easier, I would prefer to put a bend in my elevator
push/pull tube. About 3 or so inches from the pilot stick, I would like
to
put about a 30 deg. bend to straighten it out to go under the seat. Is
this
a bad idea? Will this bend compromise the control system? It seems more
then
strong enough for a Pietenpol, but I have been wrong before. Thanks.
ttp://www.matronics.com/Navigator?Pietenpol-List
com
tronics.com/contribution
" rel=nofollow
target=_blank>http://www.matronics.com/Navigator?Pietenpol-List
et=_blank>http://forums.matronics.com
llow target=_blank>http://www.matronics.com/contribution
Message 17
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| Subject: | Making "Wire Edges" |
Group,
I recently asked the group about making wire edges for the front of the
cooling eyebrows. A number of responses came back (frankly, I lost track of
who said what), but I decided to try a scrap piece out of 25 ga. 6061.
Obviously, I'll be a little more sophisticated about the bending process.
This little sample took no more than 10 minutes, and was my first attempt.
(attachments are not in order)
Gary Boothe
Cool, Ca.
Pietenpol
WW Corvair Conversion, mounted
Tail done, Fuselage on gear
(16 ribs down.)
Message 18
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| Subject: | Re: Bend in push pull tube |
Building my scout I had to route cables this way to stop any interference.
My elevator cables do not rub, but had to use a double horn.
string is to check alignment
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| Subject: | Bend in push pull tube |
I thought of that as well Gary. I can get it done, just need to take the ti
me to do it.
--- On Sat, 1/2/10, Gary Boothe <gboothe5@comcast.net> wrote:
From: Gary Boothe <gboothe5@comcast.net>
Subject: RE: Pietenpol-List: Bend in push pull tube
Michael,
=C2-
Here are some pics of my idler arm. My seat bottom is framed per plans. The
push/pull rod travels up and down at the idler arm, approximately =C2=BE
=9D.
=C2-
Just a thoughtif you ran two stringers along the bottom of your fu
se, beyond the seat bottom, you could easily pick up another 1=9D of
clearance.
=C2-
Gary Boothe
Cool, Ca.
Pietenpol
WW Corvair Conversion, mounted
Tail done,=C2-Fuselage=C2-on gear
(16 ribs down)
From: owner-pietenpol-list-server@matronics.com [mailto:owner-pietenpol-lis
t-server@matronics.com] On Behalf Of Michael Perez
Sent: Saturday, January 02, 2010 3:46 PM
Subject: Re: Pietenpol-List: Bend in push pull tube
=C2-
I was planning on doing the "typical" pivot/idler arm=C2-behind the seat,
but with my lowered seat bottom, that puts the arm under the seat and hang
ing below, past the bottom of the fuselage. I can get it figured out, what
I need to do is make/install the elevator bell crank in the fuselage and wo
rk=C2-towards the seat from the stick and the crank.
=C2-
=C2-
Steve, if you have a picture or drawing of the bearing deal you mentioned,
I would appreciate a look see.
--- On Sat, 1/2/10, Steve Ruse <steve@wotelectronics.com> wrote:
From: Steve Ruse <steve@wotelectronics.com>
Subject: Re: Pietenpol-List: Bend in push pull tube
Another thing to consider is the effect of repeated bending on that push ro
d at the bend. =C2-Eventually that rod will weaken from fatigue. =C2-I
don't know enough to tell you how to calculate when it would fail from fati
gue, but eventually it probably would. =C2-It might be after 100hrs or 10
0,000hrs, I have no idea. =C2-It will depend on the bend angle, stick for
ces, etc.
One elegant way to deal with this broblem is to put a bearing where you nee
d the bend and attach two pushrods to it, one on each side, so you have tra
nslational motion on the first pushrod, purely rotational motion around the
bearing, and then purely translational motion in a new direction via the s
econd pushrod. =C2-I don't know what that is called, but you see it a lot
on old warbirds, and you can change the direction of the pushrod to any an
gle you want with no concerns about durability.
Steve Ruse
Norman , OK
-- Sent from my Palm Pr=C4=93
David Paule wrote:
A bend will drastically reduce the compression strength of the push rod.
=C2-
The bend adds moment arm and then you have something called "beam-column be
nding" which tends to greatly reduce the compression strength of a simple c
olumn.
=C2-
For a particular case, you'd need to do some analysis. One of the better re
ferences is by Bruhn, and a good technical library will have a copy. Otherw
ise the ASM that I'd previously recommended will do fine, but it's a bit mo
re difficult to use.
=C2-
But you can always make one like that and give it a try on the ground. If y
ou can put your maximum strength on the stick without bending or collapsing
the tube, it's probably okay. Hint - don't try that on the real airplane.
Try it on a mockpit with test hardware, not flight hardware.
=C2-
David Paule
=C2-
----- Original Message -----
From: Michael Perez
Subject: Pietenpol-List: Bend in push pull tube
=C2-
To make my life easier, I would prefer to put a bend in my elevator push/pu
ll tube. About 3 or so inches from the pilot stick, I would like to put abo
ut a 30 deg. bend to straighten it out to go under the seat.=C2- Is this
a bad idea? Will this bend compromise the control system? It seems more the
n strong enough for a Pietenpol, but I have been wrong before. Thanks. =C2
-ttp://www.matronics.com/Navigator?Pietenpol-Listcomtronics.com/contribut
ion =C2- =C2- =C2-" rel=nofollow target=_blank>http://www.matroni
cs.com/Navigator?Pietenpol-Listet=_blank>http://forums.matronics.comllow
target=_blank>http://www.matronics.com/contribution =C2- =C2- =C2-h
ttp://www.matronics.com/Navigator?Pietenpol-Listhttp://forums.matronics.com
http://www.matronics.com/contribution =C2-
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