Today's Message Index:
----------------------
1. 04:23 AM - Bell crank streamlined tube No. 1667 question. (bubbleboy)
2. 04:38 AM - Re: Bell crank streamlined tube No. 1667 question. (Jack)
3. 04:41 AM - Re: Bell crank streamlined tube No. 1667 question. (Michael Perez)
4. 04:47 AM - Re: Bell crank streamlined tube No. 1667 question. (bubbleboy)
5. 04:48 AM - Re: Bell crank streamlined tube No. 1667 question. (bubbleboy)
6. 05:17 AM - four minute video of possible interest (Cuy, Michael D. (GRC-RXD0)[ASRC AEROSPACE CORP])
7. 05:28 AM - Re: Re: Bell crank streamlined tube No. 1667 question. (Jack@textors.com)
8. 05:37 AM - Re: Bell crank streamlined tube No. 1667 question. (Bill Church)
9. 05:46 AM - Re: Re: Bell crank streamlined tube No. 1667 question. (Michael Perez)
10. 06:04 AM - Re: Bell crank streamlined tube No. 1667 question. (C N Campbell)
11. 07:06 AM - Re: four minute video of possible interest (TOM STINEMETZE)
12. 09:03 AM - Pietenpol International Relations (John Hofmann)
13. 09:34 AM - Re: four minute video of possible interest (Kringle)
14. 10:30 AM - Another Burned Valve (kevinpurtee)
15. 10:44 AM - Re: Another Burned Valve (Kringle)
16. 10:51 AM - Destructive Testing of Wooden Lift Struts (kevinpurtee)
17. 10:55 AM - Re: Pietenpol International Relations (Cuy, Michael D. (GRC-RXD0)[ASRC AEROSPACE CORP])
18. 10:58 AM - Re: Destructive Testing of Wooden Lift Struts (K5YAC)
19. 11:04 AM - Re: Pietenpol International Relations (K5YAC)
20. 11:44 AM - Re: Another Burned Valve (TOM STINEMETZE)
21. 01:57 PM - Re: Another Burned Valve (kevinpurtee)
22. 02:06 PM - Re: Bell crank streamlined tube No. 1667 question. (bubbleboy)
23. 02:29 PM - Re: Re: Bell crank streamlined tube No. 1667 question. (Jack@textors.com)
24. 03:23 PM - Re: Destructive Testing of Wooden Lift Struts (tools)
25. 03:57 PM - Re: Another Burned Valve (shad bell)
26. 04:04 PM - Re: Re: Destructive Testing of Wooden Lift Struts (Gary Boothe)
27. 04:15 PM - Re: Destructive Testing of Wooden Lift Struts (tools)
28. 04:18 PM - Re: Another Burned Valve (Gary Boothe)
29. 04:35 PM - Re: Re: Destructive Testing of Wooden Lift Struts (Gary Boothe)
30. 06:14 PM - Attaching wood struts (Gary Boothe)
31. 06:37 PM - Re: Re: Another Burned Valve (Ryan Mueller)
32. 06:58 PM - Re: Another Burned Valve (kevinpurtee)
33. 07:33 PM - Re: Destructive Testing of Wooden Lift Struts (kevinpurtee)
Message 1
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Subject: | Bell crank streamlined tube No. 1667 question. |
I am starting on the control system and have ordered all the steel except the "Streamlined
tube No. 1667" that is stated on the plans for the bell crank. I have
spoken with the supplier here in Australia who I have ordered the rest of
the steel tube from and he has no idea about this. His "streamlined tube" is like
the aerofoil shape the struts are made of.
What are builders using?
Scotty
www.scottyspietenpol.com
--------
Tamworth, Australia
Building a Corvair Powered Pietenpol Air Camper
www.scottyspietenpol.com
Rudder, Vert stab, Elevators, Hor Stab and Ribs built...About to start fuselage...Corvair
engine at Roy's Garage waiting to be modified.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=372730#372730
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Subject: | Bell crank streamlined tube No. 1667 question. |
Scotty, yes to your question. I made mine from .032 4130. See here
http://textors.com/DSCN4210.JPG
Jack Textor
DSM
NX1929T
-----Original Message-----
From: owner-pietenpol-list-server@matronics.com
[mailto:owner-pietenpol-list-server@matronics.com] On Behalf Of bubbleboy
Sent: Thursday, May 10, 2012 6:23 AM
Subject: Pietenpol-List: Bell crank streamlined tube No. 1667 question.
<scott.dawson3@bigpond.com>
I am starting on the control system and have ordered all the steel except
the "Streamlined tube No. 1667" that is stated on the plans for the bell
crank. I have spoken with the supplier here in Australia who I have ordered
the rest of the steel tube from and he has no idea about this. His
"streamlined tube" is like the aerofoil shape the struts are made of.
What are builders using?
Scotty
www.scottyspietenpol.com
--------
Tamworth, Australia
Building a Corvair Powered Pietenpol Air Camper
www.scottyspietenpol.com
Rudder, Vert stab, Elevators, Hor Stab and Ribs built...About to start
fuselage...Corvair engine at Roy's Garage waiting to be modified.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=372730#372730
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Subject: | Re: Bell crank streamlined tube No. 1667 question. |
You can use the strut type tube, try to get a smaller version of it. (cross
section.)- Or, you can use round tube and squeeze the ends.- Some I be
lieve have just used flat plate.
Michael Perez
=0APietenpol HINT Videos
=0AKaretaker Aero
=0Awww.karetakeraero.com
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Subject: | Re: Bell crank streamlined tube No. 1667 question. |
Thank you Jack....where did you get that drawing from? Its not what I was thinking!
I was picturing a tube that had been squashed into an oval shape and crushed
at each end...hhhmmm
Scotty
--------
Tamworth, Australia
Building a Corvair Powered Pietenpol Air Camper
www.scottyspietenpol.com
Rudder, Vert stab, Elevators, Hor Stab and Ribs built...About to start fuselage...Corvair
engine at Roy's Garage waiting to be modified.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=372734#372734
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Subject: | Re: Bell crank streamlined tube No. 1667 question. |
Michael....is that tube with the ends flattened? Thank you for the pics...Scotty
--------
Tamworth, Australia
Building a Corvair Powered Pietenpol Air Camper
www.scottyspietenpol.com
Rudder, Vert stab, Elevators, Hor Stab and Ribs built...About to start fuselage...Corvair
engine at Roy's Garage waiting to be modified.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=372735#372735
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Subject: | four minute video of possible interest |
http://www.youtube.com/watch?v=EkGNAqlkQnY
Local friend and aviation film producer Adam White of Hemlock films (Red Ta
il Reborn, Restorers, Doolittle Raiders They Were all
Volunteers) came out to the hangar last week to film the Piet and I trying
out his new Red Epic digital video camera.
Evidently the Red Epic camera was hard for Adam to get because the producer
s of some of the big movies like the Avengers and
such used this camera and bought up the first 50 produced!
Mike C.
http://www.hemlockfilms.com/Hemlock_Films/Main.html
[cid:image001.png@01CD2E84.E1AEEA30]
Message 7
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Subject: | Re: Bell crank streamlined tube No. 1667 question. |
Scotty your vision is correct to plans. The drawing is from Ken Perkins. It allows
for less slack in the cables. If the horn is mounted as high as possible
the cables shouldn't touch the H stab. Kens number is 913-764-six nine four
nine.
Jack Textor
Sent from my iPad
On May 10, 2012, at 6:46 AM, "bubbleboy" <scott.dawson3@bigpond.com> wrote:
>
> Thank you Jack....where did you get that drawing from? Its not what I was thinking!
I was picturing a tube that had been squashed into an oval shape and crushed
at each end...hhhmmm
>
> Scotty
>
> --------
> Tamworth, Australia
> Building a Corvair Powered Pietenpol Air Camper
>
> www.scottyspietenpol.com
>
> Rudder, Vert stab, Elevators, Hor Stab and Ribs built...About to start fuselage...Corvair
engine at Roy's Garage waiting to be modified.
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=372734#372734
>
>
>
>
>
>
>
>
>
>
Message 8
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Subject: | Re: Bell crank streamlined tube No. 1667 question. |
Scotty,
There's no real need to use streamline tube, unless you happen to have a piece
lying around. The bellcrank isn't (well, it SHOULDN'T be) exposed to moving air,
since it's enclosed in the fuselage. You could use round tube, and flatten
the ends, or add tabs to attach the cables, or, as Jack has done, make up your
own belcrank from two formed pieces of sheet metal. You could also make a bellcrank
from a flat piece of steel, but you really should put a bend in it to stiffen
it, since a flat piece would need to have significant thickness to be stiff
enough without a stiffening rib, and "significant thickness" means extra
weight.
bill C.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=372739#372739
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Subject: | Re: Bell crank streamlined tube No. 1667 question. |
Yes, round tube, squeezed ends.
Michael Perez
Pietenpol HINT Videos
Karetaker Aero
www.karetakeraero.com
Message 10
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Subject: | Re: Bell crank streamlined tube No. 1667 question. |
I'm using a strip of .090 4130 steel 1 inch wide. If necessary, I will
brace the strip on each side. If you're not a purist, you don't absolutely
have to use tubing. C
----- Original Message -----
From: "bubbleboy" <scott.dawson3@bigpond.com>
Sent: Thursday, May 10, 2012 7:23 AM
Subject: Pietenpol-List: Bell crank streamlined tube No. 1667 question.
> <scott.dawson3@bigpond.com>
>
> I am starting on the control system and have ordered all the steel except
> the "Streamlined tube No. 1667" that is stated on the plans for the bell
> crank. I have spoken with the supplier here in Australia who I have
> ordered the rest of the steel tube from and he has no idea about this. His
> "streamlined tube" is like the aerofoil shape the struts are made of.
>
> What are builders using?
>
> Scotty
>
> www.scottyspietenpol.com
>
> --------
> Tamworth, Australia
> Building a Corvair Powered Pietenpol Air Camper
>
> www.scottyspietenpol.com
>
> Rudder, Vert stab, Elevators, Hor Stab and Ribs built...About to start
> fuselage...Corvair engine at Roy's Garage waiting to be modified.
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=372730#372730
>
>
>
Message 11
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Subject: | Re: four minute video of possible interest |
Message 12
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Subject: | Pietenpol International Relations |
=46rom the Holy Writ of Waldo, 2:50 - 3:01,
"You better all grab your courage everybody, 'cause this is
flying weather! Now I am talking five dollars for the best five minutes
of your life."
Last Friday my wife and I had the pleasure of hosting Eiichi
Kurabayashi, a work colleague from Japan. He was attending a conference
in Chicago and made the short drive to Madison to see our operation.
Friday was all business with lots of bowing, me in a suit (I usually
wear shorts to work), two-handed exchange of business cards (thanks Gary
Boothe for the tip) and a business lunch. Eiichi let his guard down a
bit and asked about hobbies. I told him I had a couple of airplanes and
he looked at me and asked "Why two?" The obvious answer was because I
did not have three! I asked him if he wanted to go flying and he
immediately said yes. Plans were made for a Saturday adventure.
We picked him up at his hotel in Madison and drove to Hartford, talking
about cultural differences and really enjoying the drive. The weather
was about 55 degrees and my plan was to take him up in the Cub with the
window open but lower clamshell closed so he could take pictures and we
could have the rumor of cabin heat. While prepping the Cub, he sat in
the Piet with a helmet and goggles. My natural a$$holiness tried to take
over and and shout the obvious WWII based stereotypes but the stink eye
I got from my wife let me know that was not welcome. Taxiing to the gas
pump, my new tailwheel was unlocking way too easily when applying rudder
inputs. I decided, after going around the patch by myself, that it was
not worth the small risk of scaring my guest on a slow groundloop if the
tailwheel went into full swivel on the rollout. So, I looked at my guest
and stated it was time for Plan B. 502Rocket was pushed out and we made
a nice 30 minute flight around the area. I was in a hoodie and he kept
the helmet on. It was a bit chilly but the windscreens Gene Pennington
(RIP my friend) made a few years ago really keep the face area breeze
free.
The flight was a huge success and was capped off by a bratwurst lunch.
Eiichi ate three of them. I really love sharing aviation.
-john-
John Hofmann
Vice-President, Information Technology
The Rees Group, Inc.
2424 American Lane
Madison, WI 53704
Phone: 608.443.2468 ext 150
Fax: 608.443.2474
Email: jhofmann@reesgroupinc.com
Message 13
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Subject: | Re: four minute video of possible interest |
Very well done Mike!
--------
John
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=372761#372761
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Subject: | Another Burned Valve |
In January of last year the number 3 exhaust valve burned & failed on my corvair.
One of the recommended vendors did a great job getting the heads re-done and
back to me. The failure occurred at 190 hours.
On March 31st of this year the same valve failed in the same way. This event occurred
at 290 hours. WW believes that a leak in the intake system on that side
of the motor is likely causing the failure. The intake tubes were bolted onto
the head and my primer entered the head at the stock carb base on that side
of the motor. Given my inexperience at aircraft plumbing it would not be too
great a leap to think that my sealing techniques may be the issue. (Every problem
Ive had with FBG has been self-induced.)
Mark P. has re-done the heads to include welding on intake runners. Ill replace
my intake manifold with a WW version. These mods should eliminate the possibility
of an intake leak. The other major difference in the heads is that Mark
added valve rotators.
Then there are my friends at UPS
When I sent the heads to Mark, I transposed a number on his address. That delayed
delivery for a week. My fault, but UPS response was dismal. The finished
heads were supposed to be delivered to me yesterday. Turns out, they were on
a train in Illinois that was derailed by a tornado. Now the UPS site says the
heads are either, 1) on the truck for delivery today, or 2) still in Illinois.
Im pretty frustrated, having lost the two best months of the fly-in season.
Anyway, Ill have to modify the cowling at least a little but I hope the reinstallation
goes well and Im flying by the 26th of May.
Thinking happy thoughts in Austin.
--------
Kevin "Axel" Purtee
NX899KP
Austin/San Marcos, TX
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=372763#372763
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Subject: | Re: Another Burned Valve |
Kevin, despite your problems, youre having better luck with Mark P. than I am.
I handed him my heads at corvair college 20 in Hinsdale, MI on June 4 of last
year. Not a word from him since. He hasnt returned my calls to his business,
cell phone and email. Dont know if I will ever see my heads again.
--------
John
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=372765#372765
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Subject: | Destructive Testing of Wooden Lift Struts |
I mentioned a few months ago that my original wood struts were delaminating. The
Sainted Gary Boothe made me new ones which are going strong and look great.
Anyway, as I was moving to a new hangar a couple of months ago I needed to get
rid of the old struts. They would fit in the dumpster better if I broke them
in two.
Destructive Test 1): I put one end of a strut on the u-haul bumper and the other
end on the ground. I attempted to stomp in the middle of the strut to get it
to break. The only thing that came close to being broken was my ankle. It
wouldve taken a lot more than my 200 pounds stomping on that strut to get it to
fail.
Destructive Test 2): Cut same strut half way through and repeated Test 1. Again,
the only thing close to breaking was my ankle.
Destructive Test 3): Cut same strut until less then was left intact and repeated
Test 1. This time, after several stomps and much protest, the strut gave way.
Destructive Test 4): Having determined that the only way to destroy the struts
was to cut them up, I took the opportunity to inspect the delaminating portions.
Turns out, the delaminations went in about 1/8 and the rest of the glue joints
were intact.
I've mentioned this before: the fitting attach bolt holes at the ends of the struts
showed no signs of distress.
Not exactly scientific, but it's real. The struts had ~260 hours and several hundred
landings on them. For what its worth.
--------
Kevin "Axel" Purtee
NX899KP
Austin/San Marcos, TX
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=372766#372766
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Subject: | Pietenpol International Relations |
That was a great report John and really cool you introduced your work colle
ague to open cockpit
flying and Wisconsin Brats! So did he give you 30 dollars for the best 3
0 minutes of his life or did
you cut him a discount?
Love the lunch in the hangar too.
Mike C.
do not archive
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Subject: | Re: Destructive Testing of Wooden Lift Struts |
That's more testing than I've done. Thanks for sharing the details.
--------
Mark Chouinard
Wings, Center Section and Empannage and Fuse framed up - Working on Landing Gear
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=372768#372768
Message 19
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Subject: | Re: Pietenpol International Relations |
Awesome! That's good stuff.
--------
Mark Chouinard
Wings, Center Section and Empannage and Fuse framed up - Working on Landing Gear
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=372769#372769
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Subject: | Re: Another Burned Valve |
Kevin:
One thing you might want to try after you get your heads back is the
vacuum cleaner check. Basically you hook up a vacuum cleaner to the
head so that the blower side of the vacuum pressurizes the intake. Then
use a little soapy water and slosh it liberally around any place that
might harbour an air leak. If there is one you will see bubbles. My
friend here in McPherson running a Corvair with welded intakes on his
Zenith 601 experienced detonation that forced rebuilding one of his
heads. Turns out there was a pin hole in the weld that could not be
seen with the naked eye but which showed up quickly with this test.
Tom Stinemetze
McPherson, KS.
>>> "kevinpurtee" <kevin.purtee@us.army.mil> 5/10/2012 12:30 PM >>>
<kevin.purtee@us.army.mil>
In January of last year the number 3 exhaust valve burned & failed on
my corvair. One of the recommended vendors did a great job getting the
heads re-done and back to me. The failure occurred at 190 hours.
On March 31st of this year the same valve failed in the same way. This
event occurred at 290 hours. WW believes that a leak in the intake
system on that side of the motor is likely causing the failure. The
intake tubes were bolted onto the head and my primer entered the head at
the stock carb base on that side of the motor. Given my inexperience at
aircraft plumbing it would not be too great a leap to think that my
sealing techniques may be the issue. (Every problem Ive had with FBG
has been self-induced.)
Mark P. has re-done the heads to include welding on intake runners.
Ill replace my intake manifold with a WW version. These
mods should eliminate the possibility of an intake leak. The other
major difference in the heads is that Mark added valve rotators.
Then there are my friends at UPS|
When I sent the heads to Mark, I transposed a number on his address.
That delayed delivery for a week. My fault, but UPS response was
dismal. The finished heads were supposed to be delivered to me
yesterday. Turns out, they were on a train in Illinois that was
derailed by a tornado. Now the UPS site says the heads are either, 1)
on the truck for delivery today, or 2) still in Illinois.
Im pretty frustrated, having lost the two best months of the fly-in
season.
Anyway, Ill have to modify the cowling at least a little but I hope
the reinstallation goes well and Im flying by the 26th of May.
Thinking happy thoughts in Austin.
--------
Kevin "Axel" Purtee
NX899KP
Austin/San Marcos, TX
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=372763#372763
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Subject: | Re: Another Burned Valve |
Thanks, Tom. I will do exactly that when I get home. The heads are actually at
the house.
I have to apologize to UPS now.
do not archive
--------
Kevin "Axel" Purtee
NX899KP
Austin/San Marcos, TX
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=372772#372772
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Subject: | Re: Bell crank streamlined tube No. 1667 question. |
Thank you everyone for your comments. If I was to use tube and squash each end,
do I need to heat the ends first and squash them while hot? Metal work is not
my comfort zone so im treading very carefully here and want to get it right.
Scotty
--------
Tamworth, Australia
Building a Corvair Powered Pietenpol Air Camper
www.scottyspietenpol.com
Rudder, Vert stab, Elevators, Hor Stab and Ribs built...About to start fuselage...Corvair
engine at Roy's Garage waiting to be modified.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=372774#372774
Message 23
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Subject: | Re: Bell crank streamlined tube No. 1667 question. |
Scotty I too shied away from heating metal before working. Its actually easy and
works better that way. If you squish it in a vise make sure the jaws are smooth
or covered with smooth metal. Experiment with some scrap heating till red,
it doesn't take that much heat.
Jack Textor
Sent from my iPad
On May 10, 2012, at 4:04 PM, "bubbleboy" <scott.dawson3@bigpond.com> wrote:
>
> Thank you everyone for your comments. If I was to use tube and squash each end,
do I need to heat the ends first and squash them while hot? Metal work is not
my comfort zone so im treading very carefully here and want to get it right.
>
> Scotty
>
> --------
> Tamworth, Australia
> Building a Corvair Powered Pietenpol Air Camper
>
> www.scottyspietenpol.com
>
> Rudder, Vert stab, Elevators, Hor Stab and Ribs built...About to start fuselage...Corvair
engine at Roy's Garage waiting to be modified.
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=372774#372774
>
>
>
>
>
>
>
>
>
>
Message 24
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Subject: | Re: Destructive Testing of Wooden Lift Struts |
Hey Kevin (or Gary),
Could you post some detailed pics of the end fittings? I'm sure I took some last
Brodhead, but I can't for the life of me find where I downloaded them...
Thanks!
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=372777#372777
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Subject: | Re: Another Burned Valve |
Kevin, Do you do a compression test on your cylinders at your ann. conditio
n inspections?- I was just currious if it something you caught before it
became symtamatic, or did the engine start running rough?- Knock Knock, t
he only valve issues we have had is lead build up on the intake valves, whi
ch was caught with a differential compression check.- We were able to cle
an them without removing the head, with the old rope trick.- I am hoping
to get ours out this weekend after I get done shoveling gravel and working
on the house.- With any luck I might be able to make it to brodhead for a
couple days this year.- Good luck, if I can help with any advise let me
know, if I don't know the answer I can make up stuff with big words.
-
Shad
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Subject: | Re: Destructive Testing of Wooden Lift Struts |
Kevin - Take a knee, buddy...I got this...
Tools,
Pictured is Kevin's forward and rearward upper mountings (picture on the
left with his old struts, on the right with the new). He chose to give
himself some adjustment (on the rear strut?). I'm way too simple to
understand wash-in / wash-out (Kevin, being a fling-wing pilot, understands
all that complicated stuff like blade precession, etc.), so I will be
employing the attachment on the left, for all 16 points. I noticed some time
back that Douwe had set his up that way, and when I asked him how to make
adjustments, he said he couldn't.just measure carefully. I decided that, if
I could build an airplane, I could measure carefully.
St. Gary
NX308MB
-----Original Message-----
From: owner-pietenpol-list-server@matronics.com
[mailto:owner-pietenpol-list-server@matronics.com] On Behalf Of tools
Sent: Thursday, May 10, 2012 3:21 PM
Subject: Pietenpol-List: Re: Destructive Testing of Wooden Lift Struts
n0kkj@yahoo.com>
Hey Kevin (or Gary),
Could you post some detailed pics of the end fittings? I'm sure I took some
last Brodhead, but I can't for the life of me find where I downloaded
them...
Thanks!
Read this topic online here:
<http://forums.matronics.com/viewtopic.php?p=372777#372777>
http://forums.matronics.com/viewtopic.php?p=372777#372777
http://www.matronics.com/Navigator?Pietenpol-List
http://www.matronics.com/contribution
Message 27
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Subject: | Re: Destructive Testing of Wooden Lift Struts |
Wow, simple enough. Are those AN4's or one size larger? Are they lined up, or
staggered a bit (can't quite tell by the photo, look lined up with each other)?
What's the spacing (can probably come close with a educated guess, but if
you have it handy...)?
Lastly, insofar as "measuring carefully, no washout or anything, right? Just maintain
the same incidence set by lift struts?
Thanks again! Crazy quick, really appreciate that.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=372781#372781
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Subject: | Another Burned Valve |
".if I don't know the answer I can make up stuff with big words." THAT's the
spirit, Shad!
Gary Boothe
NX308MB
From: owner-pietenpol-list-server@matronics.com
[mailto:owner-pietenpol-list-server@matronics.com] On Behalf Of shad bell
Sent: Thursday, May 10, 2012 3:56 PM
Subject: Re: Pietenpol-List: Another Burned Valve
Kevin, Do you do a compression test on your cylinders at your ann. condition
inspections? I was just currious if it something you caught before it
became symtamatic, or did the engine start running rough? Knock Knock, the
only valve issues we have had is lead build up on the intake valves, which
was caught with a differential compression check. We were able to clean
them without removing the head, with the old rope trick. I am hoping to get
ours out this weekend after I get done shoveling gravel and working on the
house. With any luck I might be able to make it to brodhead for a couple
days this year. Good luck, if I can help with any advise let me know, if I
don't know the answer I can make up stuff with big words.
Shad
Message 29
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Subject: | Re: Destructive Testing of Wooden Lift Struts |
Kevin will have to answer for his. Mine are AN3, with an AN5 bracket-to-wing
attach. Brackets are about 6" long, with AN3's unevenly spaced from 1 1/2"
to 2", in a straight line.....AND NOT FLIGHT TESTED!
Gary Boothe
NX308MB
-----Original Message-----
From: owner-pietenpol-list-server@matronics.com
[mailto:owner-pietenpol-list-server@matronics.com] On Behalf Of tools
Sent: Thursday, May 10, 2012 4:14 PM
Subject: Pietenpol-List: Re: Destructive Testing of Wooden Lift Struts
Wow, simple enough. Are those AN4's or one size larger? Are they lined up,
or staggered a bit (can't quite tell by the photo, look lined up with each
other)? What's the spacing (can probably come close with a educated guess,
but if you have it handy...)?
Lastly, insofar as "measuring carefully, no washout or anything, right?
Just maintain the same incidence set by lift struts?
Thanks again! Crazy quick, really appreciate that.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=372781#372781
Message 30
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Subject: | Attaching wood struts |
Tools,
Here's some more that I pulled off of www.westcoastpiet.com a long time ago.
St. Gary
NX308MB
Message 31
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Subject: | Re: Another Burned Valve |
Took a full year for the ones I had done. Left them at the mini-CC he had
at his shop right after Brodhead, received at Brodhead the year after.
Absolutely beautiful work (ask Tom S). I assume the lacks of heads will not
be holding up your build progress......the lack of heads is holding up
Kevin's flying progress (and quite a bit of progress he has made in that
regard). If I run a small auto-shop in Southern WI, and also specialize in
niche cylinder head work, and have X amount of time to devote to the things
that keep the lights on.....where am I going to prioritize the time I have
to do Corvair cylinder head work? To the guy I know that is flying the
pants off his airplane, not the one that may be aways away from having an
actual need for their heads (apart from just wanting to have them). That
better supports the flying community of aircraft.
No offense intended to you, it's just the reality of the situation. You'll
get your heads, you just have to be patient (getting to the point of
needing them would not hurt either)....they're worth the wait.
Ryan
do not archive
On Thu, May 10, 2012 at 12:44 PM, Kringle <Mrkringles@msn.com> wrote:
>
> Kevin, despite your problems, you=92re having better luck with Mark P. th
an
> I am. I handed him my heads at corvair college 20 in Hinsdale, MI on Jun
e
> 4 of last year. Not a word from him since. He hasn=92t returned my call
s to
> his business, cell phone and email. Don=92t know if I will ever see my h
eads
> again.
>
> --------
> John
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=372765#372765
>
>
===========
===========
===========
===========
>
>
Message 32
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Subject: | Re: Another Burned Valve |
@Shad: Both failures showed themselves very quickly when the little chunk of valve
physically broke off and apparently left through the exhaust pipe. It lost
100 rpm and the engine ran a little rougher.
Looking forward to the big words:).
--------
Kevin "Axel" Purtee
NX899KP
Austin/San Marcos, TX
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=372791#372791
Message 33
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Subject: | Re: Destructive Testing of Wooden Lift Struts |
Thanks, Gary:).
@Mike: the bolts bolting the fittings to the struts are AN4 and the bolts bolting
the fittings to the wings are AN5 or 6. If the bolt holes on the fitting are
staggered it's because I couldn't drill the holes in a straight line.
I have used the threaded adjustment feature on the two aft fittings to make the
airplane fly straighter. It would certainly be flyable without the adjustment
but I'm glad I have the ability to tweak it. Gentle, hardly-noticeable turns
are fine in the traffic pattern. They get tedious on cross country flights.
A general thought for builders considering wood struts: if you're worried about
the design considerations associated with wood struts then you may want to keep
it simple and build to the plans. Can't go wrong doing that.
--------
Kevin "Axel" Purtee
NX899KP
Austin/San Marcos, TX
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=372796#372796
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