Today's Message Index:
----------------------
1. 03:40 AM - Re: builders ages (Gene & Tammy)
2. 04:16 AM - Re: builders ages ()
3. 04:40 AM - Re: Kerosene Heater (Glenn Thomas)
4. 07:39 AM - Weld cracks found (HelsperSew@aol.com)
5. 08:31 AM - Re: prop (Dick Navratil)
6. 08:35 AM - Re: Weld cracks found (Phillips, Jack)
7. 08:55 AM - Re: List: Builder's Ages (Ben Williams)
8. 09:12 AM - Re: Duane Woolsey? (Steve Eldredge)
9. 09:15 AM - Re: builders ages (Steve Eldredge)
10. 09:43 AM - Re: builders ages (HelsperSew@aol.com)
11. 09:54 AM - Re: Duane Woolsey? (Jeff Boatright)
12. 10:03 AM - Re: builders ages ()
13. 10:09 AM - waistlines (Cuy, Michael D. (GRC-RXD0)[ASRC])
14. 10:26 AM - Re: builders ages (Phillips, Jack)
15. 10:38 AM - Re: Another dumb question (Phillips, Jack)
16. 11:36 AM - John Dilatush's prop (Oscar Zuniga)
17. 11:59 AM - prop size 65 Continental (Cuy, Michael D. (GRC-RXD0)[ASRC])
18. 12:31 PM - Re: waistlines (Jeff Boatright)
19. 01:18 PM - Re: builders ages (walt evans)
20. 01:23 PM - Re: Re: Kerosene Heater (walt evans)
21. 01:24 PM - Re: builders ages (walt evans)
22. 01:32 PM - Re: waistlines (Steve Eldredge)
23. 01:38 PM - Re: Weld cracks found (walt evans)
24. 02:22 PM - Re: Weld cracks found (Jack T. Textor)
25. 03:04 PM - off topic vid link (walt evans)
26. 03:13 PM - average age (glich7@juno.com)
27. 03:17 PM - Re: Weld cracks found (walt evans)
28. 03:56 PM - Re: average age (walt evans)
29. 04:15 PM - Re: prop (Don Emch)
30. 04:45 PM - Re: Weld cracks found (HelsperSew@aol.com)
31. 05:40 PM - Re: prop (gcardinal)
32. 06:56 PM - Re: Re: prop (Dick Navratil)
33. 07:50 PM - Re: prop (Don Emch)
34. 09:05 PM - Re: Weld cracks found (walt evans)
35. 10:23 PM - Re: builders ages (Clif Dawson)
36. 10:41 PM - Re: builders ages (Rob Stapleton)
37. 11:50 PM - Re: Weld cracks found (Clif Dawson)
Message 1
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Subject: | Re: builders ages |
Walt,
Your tank looks really good. I was wondering about the welding. I have
never welded and I think any welding I need done I will farm out.
Gene
----- Original Message -----
From: walt evans
To: pietenpol-list@matronics.com
Sent: Sunday, January 07, 2007 9:14 PM
Subject: Re: Pietenpol-List: builders ages
Gene,
Yeah, I used the shape that was shown in the original plans. Made
Posterboard (Oaktag for us older guys) patterns, and cut it out of soft
aluminum. Learned how to TIG weld and thought it was easy. After I
welded both this tank and the main tank, filled it with water. Could
have used them for a watering can. :^).
Asked a deal with my friend Don C. and he rewelded both tanks to
perfection.
Right now he's building about his 5th project,,,A Titan Tornado.
Here's my main tank
walt evans
NX140DL
"Put your wealth in knowledge, and no one can ever take it from you"
Ben Franklin
----- Original Message -----
From: Gene & Tammy
To: pietenpol-list@matronics.com
Sent: Sunday, January 07, 2007 7:34 PM
Subject: Re: Pietenpol-List: builders ages
Walt, very nice! Where did you get your fuel tank? Did you build
it?
Gene
----- Original Message -----
From: walt evans
To: pietenpol-list@matronics.com
Sent: Sunday, January 07, 2007 11:51 AM
Subject: Re: Pietenpol-List: builders ages
Jack,
Nice site. See your favorite ,,,Destin, Fl
My parents lived in Ft Walton Beach for years. When visiting,
always had to go see that beautiful beach.
Here's some pics of my center section
walt evans
NX140DL
do not archive
"Put your wealth in knowledge, and no one can ever take it from
you"
Ben Franklin
----- Original Message -----
From: Jack T. Textor
To: pietenpol-list@matronics.com
Sent: Sunday, January 07, 2007 12:12 PM
Subject: RE: Pietenpol-List: builders ages
Jack Textor, 53.like to be flying by 55 if I'm lucky. Working
on center section, wings ready for assembly, tail feathers done,
fuselage and gear almost done, 99% to go!
www.textors.com
do not archive
href="http://www.matronics.com/Navigator?Pietenpol-List">http://www.mat
ronics.com/Navigator?Pietenpol-List
href="http://forums.matronics.com">http://forums.matronics.com
href="http://www.matronics.com/Navigator?Pietenpol-List">http://www.mat
ronics.com/Navigator?Pietenpol-List
href="http://forums.matronics.com">http://forums.matronics.com
Message 2
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Riding in on this letter to say I'm 60 years young and
flying,fliing,flizing.HAHAHA is that one still going round?
________________________________
From: owner-pietenpol-list-server@matronics.com
[mailto:owner-pietenpol-list-server@matronics.com] On Behalf Of Cuy,
Michael D. (GRC-RXD0)[ASRC]
Sent: January 7, 2007 10:51 AM
Subject: Pietenpol-List: builders ages
Mike C. 47 and still keeping to my goal of keeping my waistline
measurement under my age:)
Message 3
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Subject: | Re: Kerosene Heater |
Larry,
Thanks for letting me know about the heater. I'll stop using it and look for something
like you mentioned. I'll have to go back and destroy one of my ribs
to see how it fails.
Was the kerosene heater going during building or your friends ribs? If so, what
did he do?
--------
Glenn Thomas
N?????
http://www.flyingwood.com
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=86277#86277
Message 4
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Subject: | Weld cracks found |
Hi Piet'ers
As of late I have been fabricating my straight axle landing gear. I elected
to use .120" wall thick 1 1/2" O.D. 4130 tube for the axle. There has been
a lot of debate on this subject, of what is sufficient wall thickness for
this axle. After the misfortunate forced landing of Iccarus Plummet a couple
of
years ago there was substantial discussion on this site on the subject. The
BHP Flying and Glider plans call for a 12 gauge tube, which equates to .109"
wall thickness, so I figure I'm a little thicker, plus a stronger alloy.
Anyway, I welded onto my axle two 1/2" dia. tubes to act as anti-rotate devices
so the axle can't rotate when the brakes are applied (a-la-Mike Cuy). I
then took it over to the local engine shop on the other side of the airport here
in Poplar Grove, with instructions to Mag-na-flux (magnetic particle
non-destructive test) the welds. To my surprise they found two cracks! It was
explained to me that when the weld cools, sometimes the weld area shrinks and
"pulls" away from the base metal, thus causing the crack. I had to go back and
grind-out the cracks, and re-weld, then re-inspect.
Message 5
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Chuck
>From what I can see from the pic in the catalog it appears to be a
bubble tape. If it will give extra rpm on take off, for $25.00 I'll
give it a try.
Dick
----- Original Message -----
From: Rcaprd@aol.com
To: pietenpol-list@matronics.com
Sent: Sunday, January 07, 2007 11:00 PM
Subject: Re: Pietenpol-List: prop
In a message dated 1/7/2007 10:50:59 PM Central Standard Time,
horzpool@goldengate.net writes:
I was just sitting in front of the t.v. paging thru the Wicks
cataloug. I happened to spot on pages 283-284, items called a "Prop
Kit". They are a Vortelator device that clain to add 20-50 rpm and
increase speed. Has anyone tried one of these? Any power increase with
an A-65 would help.
Also, I just read the post by Don Emch. I run a Senenich 72-42.
His numbers are much better than mine for climb and speed. Does anyone
else have a similar prop?
Don, do you get a full static run up with that prop? I don't care
about the speed but your climb is better than my 200-250 fpm.
Dick N.
Dick,
Is that Vortelator device anything like Dimple Tape ? Bill Rewey has
that on his prop, and I think he claims that it increased the rpm about
50 rpm.
I have my homebuilt 72 / 42 and have similar performance as you do.
Gene, Both numbers are in Inches. 72" diameter, and 42" pitch. The
pitch is how far the prop will advance in one revolution, with a
theoretical No Slip condition.
Chuck G.
Message 6
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Subject: | Weld cracks found |
I probably had the same thing on my original axle on Icarus Plummet,
hence the cracks (which, not surprisingly, originated at the same weld
you are describing). When I built the new axle, I did a dye-penetrant
inspection of the welds before and after sending it out for heat
treating. No cracks this time, and so far, 75 hours (and many bad
landings) of trouble free operation.
Jack Phillips
NX899JP "Icarus Plummet"
Raleigh, NC, where it was clear and 72 degrees Saturday, so I put 1.5
hours on old Icarus, including another bad landing (not surprising in
the 15 knot crosswind)
-----Original Message-----
From: owner-pietenpol-list-server@matronics.com
[mailto:owner-pietenpol-list-server@matronics.com] On Behalf Of
HelsperSew@aol.com
Sent: Monday, January 08, 2007 10:38 AM
Subject: Pietenpol-List: Weld cracks found
Hi Piet'ers
As of late I have been fabricating my straight axle landing gear. I
elected to use .120" wall thick 1 1/2" O.D. 4130 tube for the axle.
There has been a lot of debate on this subject, of what is sufficient
wall thickness for this axle. After the misfortunate forced landing of
Iccarus Plummet a couple of years ago there was substantial discussion
on this site on the subject. The BHP Flying and Glider plans call for a
12 gauge tube, which equates to .109" wall thickness, so I figure I'm a
little thicker, plus a stronger alloy. Anyway, I welded onto my axle
two 1/2" dia. tubes to act as anti-rotate devices so the axle can't
rotate when the brakes are applied (a-la-Mike Cuy). I then took it over
to the local engine shop on the other side of the airport here in Poplar
Grove, with instructions to Mag-na-flux (magnetic particle
non-destructive test) the welds. To my surprise they found two cracks!
It was explained to me that when the weld cools, sometimes the weld area
shrinks and "pulls" away from the base metal, thus causing the crack. I
had to go back and grind-out the cracks, and re-weld, then re-inspect.
_________________________________________________
This message is for the designated recipient only and may contain privilege
d, proprietary, or otherwise private information. If you have received it i
n error, please notify the sender immediately and delete the original. Any
other use of the email by you is prohibited.
Dansk - Deutsch - Espanol - Francais - Italiano - Japanese - Nederlands - N
Message 7
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Subject: | Re: List: Builder's Ages |
Ben Williams, 35. Ribs on one piece spars, tail feathers and corvair core.
Message 8
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Duane owns the hangar next to mine. He and I flew out to Brodhead and
OSH in 99' he sold his plane during the show, and it went to Terre
Haute Indiana. I heard that it was ground looped not long after and the
prop was destroyed. The fellows contacted Duane and he carved another
one himself. He only built those two props that I know of, unless he
did one for John Dilatush. The prop was unique in shape, and in sound.
It made a whistle sound at idle, which made for a cool sounding approach
and landing. I'd be interested to know if his plane is still flying...
Duane hasn't done much flying since 99', but he and a partner did buy a
GN1 with an A-65, that is a bit on the heavy side. He has also had two
partially completed Air-Bike projects in the hangar for years.
Steve E
steve@byu.edu
-----Original Message-----
From: owner-pietenpol-list-server@matronics.com
[mailto:owner-pietenpol-list-server@matronics.com] On Behalf Of
Catdesigns
Sent: Sunday, January 07, 2007 9:04 PM
Subject: Re: Pietenpol-List: Duane Woolsey?
<catdesigns@comcast.net>
Duane Woolsey is not on this list. He sold the plane back in 98 (?) or
there about. It had a Subaru AE81. I don't know the current owner.
Steve
Eldredge in Utah might know how to get in touch with Duane. John
Dilatush
used an Turbo AE82 in his, by the way.
Chris Tracy
Sacramento, Ca
Website at http://www.Westcoastpiet.com
----- Original Message -----
From: "Jeff Boatright" <jboatri@emory.edu>
Sent: Sunday, January 07, 2007 5:58 PM
Subject: Pietenpol-List: Duane Woolsey?
<jboatri@emory.edu>
>
> Duane,
>
> I just saw a photo of your plane at westcoastpiet.com. What engine and
> prop are you using? The prop seems huge.
>
> Thanks,
>
> Jeff
> --
> Jeffrey H. Boatright, Ph.D.
> Associate Professor
> Department of Ophthalmology
> Emory University School of Medicine
> Atlanta, GA 30322
> Editor-in-Chief
> Molecular Vision
> http://www.molvis.org/
>
>
>
Message 9
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Steve E Started building at age 26. First flight at age 29. Now 330hrs
at age 38. The Piet is the only way I've been able to stay in the air
at all during the intense family phase of raising children... Thanks
Bernard!
Note to Mike C, waistline=age currently
Steve Eldredge
steve@byu.edu <mailto:steve@byu.edu>
From: owner-pietenpol-list-server@matronics.com
[mailto:owner-pietenpol-list-server@matronics.com] On Behalf Of Cuy,
Michael D. (GRC-RXD0)[ASRC]
Sent: Sunday, January 07, 2007 8:51 AM
Subject: Pietenpol-List: builders ages
Mike C. 47 and still keeping to my goal of keeping my waistline
measurement under my age:)
Message 10
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Subject: | Re: builders ages |
Mike,
You guys that have the waistlines progressing with your age.........Sorry to
be the one to tell you this................at risk of stating the
obvious......................................YOU ARE GETTING ABOUT 5 LBS CLOSER
TO THE
MAX GROSS WEIGHT WITH EACH PASSING YEAR! (INCH)
Dan Helsper
Poplar Grove, IL.
149 Lbs :)
Message 11
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Steve,
Thanks for the information. Was the prop as long in real-life and it
looks in the photo? Also, how did it perform?
Thanks,
Jeff
At 10:11 AM -0700 1/8/07, Steve Eldredge wrote:
>
>Duane owns the hangar next to mine. He and I flew out to Brodhead and
>OSH in 99' he sold his plane during the show, and it went to Terre
>Haute Indiana. I heard that it was ground looped not long after and the
>prop was destroyed. The fellows contacted Duane and he carved another
>one himself. He only built those two props that I know of, unless he
>did one for John Dilatush. The prop was unique in shape, and in sound.
>It made a whistle sound at idle, which made for a cool sounding approach
>and landing. I'd be interested to know if his plane is still flying...
>Duane hasn't done much flying since 99', but he and a partner did buy a
>GN1 with an A-65, that is a bit on the heavy side. He has also had two
>partially completed Air-Bike projects in the hangar for years.
>
>
>Steve E
>
>steve@byu.edu
--
_____________________________________________________________
Jeffrey H. Boatright, PhD
Associate Professor, Emory Eye Center, Atlanta, GA, USA
Senior Editor, Molecular Vision, http://www.molvis.org/molvis
mailto:jboatri@emory.edu
Message 12
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YAYA tell me about it. I feel every time I get into my plane that I am
putting it on rather than getting in! I weigh 200lbs now and I plan on
loosing a further 50lbs but Christmas holidays have not helped in the
area one bit! I should be 140lbs for my 5'3" frame but I will be quite
happy with being 150.I just know that if I loose the 50lbs I will get up
to 90 mph out of the 80 hp Franklin as well or at least so I've been
told and I don't want to burst their bubble. I'd like to prove them
right.
Do not archive
________________________________
From: owner-pietenpol-list-server@matronics.com
[mailto:owner-pietenpol-list-server@matronics.com] On Behalf Of
HelsperSew@aol.com
Sent: January 8, 2007 12:42 PM
Subject: Re: Pietenpol-List: builders ages
Mike,
You guys that have the waistlines progressing with your
age.........Sorry to be the one to tell you this................at risk
of stating the obvious......................................YOU ARE
GETTING ABOUT 5 LBS CLOSER TO THE MAX GROSS WEIGHT WITH EACH PASSING
YEAR! (INCH)
Dan Helsper
Poplar Grove, IL.
149 Lbs :)
Message 13
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Great responses to the waistline vs. age stats !
Message 14
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I'm working on it as well. The holidays put me at 204 lbs, which is a
bit much even for my 6'2" frame. I've gone on a diet and hope to get
down under 185. Have lost 7 lbs so far - still a long way to go. Ain't
no fun either.
For the record, I am 53. I was 43 when I started working on my
Pietenpol and 51 when I flew it for the first time.
Jack Phillips
-----Original Message-----
From: owner-pietenpol-list-server@matronics.com
[mailto:owner-pietenpol-list-server@matronics.com] On Behalf Of
harvey.rule@bell.ca
Sent: Monday, January 08, 2007 12:56 PM
Subject: RE: Pietenpol-List: builders ages
YAYA tell me about it. I feel every time I get into my plane that I am
putting it on rather than getting in! I weigh 200lbs now and I plan on
loosing a further 50lbs but Christmas holidays have not helped in the
area one bit! I should be 140lbs for my 5'3" frame but I will be quite
happy with being 150.I just know that if I loose the 50lbs I will get up
to 90 mph out of the 80 hp Franklin as well or at least so I've been
told and I don't want to burst their bubble. I'd like to prove them
right.
Do not archive
_____
From: owner-pietenpol-list-server@matronics.com
[mailto:owner-pietenpol-list-server@matronics.com] On Behalf Of
HelsperSew@aol.com
Sent: January 8, 2007 12:42 PM
Subject: Re: Pietenpol-List: builders ages
Mike,
You guys that have the waistlines progressing with your
age.........Sorry to be the one to tell you this................at risk
of stating the obvious......................................YOU ARE
GETTING ABOUT 5 LBS CLOSER TO THE MAX GROSS WEIGHT WITH EACH PASSING
YEAR! (INCH)
Dan Helsper
Poplar Grove, IL.
149 Lbs :)
_________________________________________________
This message is for the designated recipient only and may contain privilege
d, proprietary, or otherwise private information. If you have received it i
n error, please notify the sender immediately and delete the original. Any
other use of the email by you is prohibited.
Dansk - Deutsch - Espanol - Francais - Italiano - Japanese - Nederlands - N
Message 15
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Subject: | Another dumb question |
I've got a Sensenich 72 x 42 on mine. Performance is pretty good, but I
can't quite hit redline RPM at full throttle in level flight. A 44"
pitch might not allow the engine to develop full power for climb abd
takeoff.
Jack
-----Original Message-----
From: owner-pietenpol-list-server@matronics.com
[mailto:owner-pietenpol-list-server@matronics.com] On Behalf Of Gene &
Tammy
Sent: Sunday, January 07, 2007 8:47 PM
Subject: Pietenpol-List: Another dumb question
Has anyone used a 72-44 prop with their A-65 Piet.? How has it worked
out?
I need a new prop and have seen one of the above for sale. In the past
some have advised that they use a 72-43 with good results so was
wondering what 1 more degree of pitch would do.
Anyone know of a good prop for sale?
Gene
_________________________________________________
This message is for the designated recipient only and may contain privilege
d, proprietary, or otherwise private information. If you have received it i
n error, please notify the sender immediately and delete the original. Any
other use of the email by you is prohibited.
Dansk - Deutsch - Espanol - Francais - Italiano - Japanese - Nederlands - N
Message 16
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Subject: | John Dilatush's prop |
There's a pretty good picture of the interesting prop that John had on
"Mountain Piet", the first picture at
http://www.flysquirrel.net/piets/John2.html . I don't remember him saying
anything about it having a whistling sound to it, but with the Subaru
running at 1.2x the prop speed and running a turbocharger, there's no
telling what kind of sounds that thing makes!
What a beautiful airplane.
Oscar Zuniga
San Antonio, TX
mailto: taildrags@hotmail.com
website at http://www.flysquirrel.net
_________________________________________________________________
Fixing up the home? Live Search can help
Message 17
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Subject: | prop size 65 Continental |
I'm running the same prop size/pitch as Jack Phillips with a wood 72 x
42 but manufactured by Falcon. Climb about per Don E.'s figures with
cruise about 72 mph.
Mike C.
Message 18
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44x34: age by waist, or poor prop choice for a Piet? Enquiring minds...
At 12:03 PM -0600 1/8/07, Cuy, Michael D. (GRC-RXD0)[ASRC] wrote:
>Great responses to the waistline vs. age stats !
>
>
--
_____________________________________________________________
Jeffrey H. Boatright, PhD
Associate Professor, Emory Eye Center, Atlanta, GA, USA
Senior Editor, Molecular Vision, http://www.molvis.org/molvis
mailto:jboatri@emory.edu
Message 19
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Subject: | Re: builders ages |
Gene,
Yeah, messing with a TIG welder is fun, but best left to someone who
knows.
Not just for the money saving part,,,I just couldn't imagine finding a
leak now in my top tank and have to destroy the fabric to get the tank
out and repair it. It just wouldn't make sense
walt evans
NX140DL
"Put your wealth in knowledge, and no one can ever take it from you"
Ben Franklin
----- Original Message -----
From: Gene & Tammy
To: pietenpol-list@matronics.com
Sent: Monday, January 08, 2007 6:39 AM
Subject: Re: Pietenpol-List: builders ages
Walt,
Your tank looks really good. I was wondering about the welding. I
have never welded and I think any welding I need done I will farm out.
Gene
----- Original Message -----
From: walt evans
To: pietenpol-list@matronics.com
Sent: Sunday, January 07, 2007 9:14 PM
Subject: Re: Pietenpol-List: builders ages
Gene,
Yeah, I used the shape that was shown in the original plans. Made
Posterboard (Oaktag for us older guys) patterns, and cut it out of soft
aluminum. Learned how to TIG weld and thought it was easy. After I
welded both this tank and the main tank, filled it with water. Could
have used them for a watering can. :^).
Asked a deal with my friend Don C. and he rewelded both tanks to
perfection.
Right now he's building about his 5th project,,,A Titan Tornado.
Here's my main tank
walt evans
NX140DL
"Put your wealth in knowledge, and no one can ever take it from you"
Ben Franklin
----- Original Message -----
From: Gene & Tammy
To: pietenpol-list@matronics.com
Sent: Sunday, January 07, 2007 7:34 PM
Subject: Re: Pietenpol-List: builders ages
Walt, very nice! Where did you get your fuel tank? Did you
build it?
Gene
----- Original Message -----
From: walt evans
To: pietenpol-list@matronics.com
Sent: Sunday, January 07, 2007 11:51 AM
Subject: Re: Pietenpol-List: builders ages
Jack,
Nice site. See your favorite ,,,Destin, Fl
My parents lived in Ft Walton Beach for years. When visiting,
always had to go see that beautiful beach.
Here's some pics of my center section
walt evans
NX140DL
do not archive
"Put your wealth in knowledge, and no one can ever take it from
you"
Ben Franklin
----- Original Message -----
From: Jack T. Textor
To: pietenpol-list@matronics.com
Sent: Sunday, January 07, 2007 12:12 PM
Subject: RE: Pietenpol-List: builders ages
Jack Textor, 53.like to be flying by 55 if I'm lucky. Working
on center section, wings ready for assembly, tail feathers done,
fuselage and gear almost done, 99% to go!
www.textors.com
do not archive
href="http://www.matronics.com/Navigator?Pietenpol-List">http://www.mat
ronics.com/Navigator?Pietenpol-List
href="http://forums.matronics.com">http://forums.matronics.com
href="http://www.matronics.com/Navigator?Pietenpol-List">http://www.mat
ronics.com/Navigator?Pietenpol-List
href="http://forums.matronics.com">http://forums.matronics.com
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Subject: | Re: Kerosene Heater |
Think the heater is when you are doing fabric. Saw a beautiful Cub with
spots all over the back in the yellow. Said it was from kerosene heater
walt evans
NX140DL
"Put your wealth in knowledge, and no one can ever take it from you"
Ben Franklin
----- Original Message -----
From: "Glenn Thomas" <glennthomas@flyingwood.com>
Sent: Monday, January 08, 2007 7:40 AM
Subject: Pietenpol-List: Re: Kerosene Heater
> <glennthomas@flyingwood.com>
>
> Larry,
> Thanks for letting me know about the heater. I'll stop using it and look
> for something like you mentioned. I'll have to go back and destroy one of
> my ribs to see how it fails.
>
> Was the kerosene heater going during building or your friends ribs? If
> so, what did he do?
>
> --------
> Glenn Thomas
> N?????
> http://www.flyingwood.com
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=86277#86277
>
>
>
Message 21
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Subject: | Re: builders ages |
Know it's knot. :^)
walt evans
NX140DL
"Put your wealth in knowledge, and no one can ever take it from you"
Ben Franklin
----- Original Message -----
From: harvey.rule@bell.ca
To: pietenpol-list@matronics.com
Sent: Monday, January 08, 2007 7:16 AM
Subject: RE: Pietenpol-List: builders ages
Riding in on this letter to say I'm 60 years young and
flying,fliing,flizing.HAHAHA is that one still going round?
-------------------------------------------------------------------------
-----
From: owner-pietenpol-list-server@matronics.com
[mailto:owner-pietenpol-list-server@matronics.com] On Behalf Of Cuy,
Michael D. (GRC-RXD0)[ASRC]
Sent: January 7, 2007 10:51 AM
To: pietenpol-list@matronics.com
Subject: Pietenpol-List: builders ages
Mike C. 47 and still keeping to my goal of keeping my waistline
measurement under my age:)
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No, no, to get prop pitch it should be height x waist size
Hence:
72x42
Steve E
I thought everyone knew that.
From: owner-pietenpol-list-server@matronics.com
[mailto:owner-pietenpol-list-server@matronics.com] On Behalf Of Jeff
Boatright
Sent: Monday, January 08, 2007 1:30 PM
Subject: Re: Pietenpol-List: waistlines
44x34: age by waist, or poor prop choice for a Piet? Enquiring minds...
At 12:03 PM -0600 1/8/07, Cuy, Michael D. (GRC-RXD0)[ASRC] wrote:
Great responses to the waistline vs. age stats !
--
_____________________________________________________________
Jeffrey H. Boatright, PhD
Associate Professor, Emory Eye Center, Atlanta, GA, USA
Senior Editor, Molecular Vision, http://www.molvis.org/molvis
mailto:jboatri@emory.edu
Message 23
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Subject: | Re: Weld cracks found |
I think if 4130 is welded with oxy/act with basic proper cooling, cracks
can virtually never form. I would imagine that your axle was either
TIG, ed, MIG,ed or stick welded.
You stated that "when the weld cooled" that doesn't happen with torch
welding, the whole thing is red like a cherry, and when left in still
air cools to a normalized condition.
As per my Mentor,,,"weld 4130 with common filler rod with oxy/act, cool
in still air, and you'll never have a problem"
Just walter's 2 cents
walt evans
NX140DL
"Put your wealth in knowledge, and no one can ever take it from you"
Ben Franklin
----- Original Message -----
From: HelsperSew@aol.com
To: pietenpol-list@matronics.com
Sent: Monday, January 08, 2007 10:38 AM
Subject: Pietenpol-List: Weld cracks found
Hi Piet'ers
As of late I have been fabricating my straight axle landing gear. I
elected to use .120" wall thick 1 1/2" O.D. 4130 tube for the axle.
There has been a lot of debate on this subject, of what is sufficient
wall thickness for this axle. After the misfortunate forced landing of
Iccarus Plummet a couple of years ago there was substantial discussion
on this site on the subject. The BHP Flying and Glider plans call for a
12 gauge tube, which equates to .109" wall thickness, so I figure I'm a
little thicker, plus a stronger alloy. Anyway, I welded onto my axle
two 1/2" dia. tubes to act as anti-rotate devices so the axle can't
rotate when the brakes are applied (a-la-Mike Cuy). I then took it over
to the local engine shop on the other side of the airport here in Poplar
Grove, with instructions to Mag-na-flux (magnetic particle
non-destructive test) the welds. To my surprise they found two cracks!
It was explained to me that when the weld cools, sometimes the weld area
shrinks and "pulls" away from the base metal, thus causing the crack. I
had to go back and grind-out the cracks, and re-weld, then re-inspect.
Message 24
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Subject: | Weld cracks found |
Walt,
Can you expand on "common filler rod"? I've heard it's best NOT to use
4130 filler.
Thanks!
Jack
www.textors.com
I think if 4130 is welded with oxy/act with basic proper cooling, cracks
can virtually never form. I would imagine that your axle was either
TIG, ed, MIG,ed or stick welded.
You stated that "when the weld cooled" that doesn't happen with torch
welding, the whole thing is red like a cherry, and when left in still
air cools to a normalized condition.
As per my Mentor,,,"weld 4130 with common filler rod with oxy/act, cool
in still air, and you'll never have a problem"
Just walter's 2 cents
walt evans
NX140DL
"Put your wealth in knowledge, and no one can ever take it from you"
Ben Franklin
----- Original Message -----
From: HelsperSew@aol.com
To: pietenpol-list@matronics.com
Sent: Monday, January 08, 2007 10:38 AM
Subject: Pietenpol-List: Weld cracks found
Hi Piet'ers
As of late I have been fabricating my straight axle landing
gear. I elected to use .120" wall thick 1 1/2" O.D. 4130 tube for the
axle. There has been a lot of debate on this subject, of what is
sufficient wall thickness for this axle. After the misfortunate forced
landing of Iccarus Plummet a couple of years ago there was substantial
discussion on this site on the subject. The BHP Flying and Glider plans
call for a 12 gauge tube, which equates to .109" wall thickness, so I
figure I'm a little thicker, plus a stronger alloy. Anyway, I welded
onto my axle two 1/2" dia. tubes to act as anti-rotate devices so the
axle can't rotate when the brakes are applied (a-la-Mike Cuy). I then
took it over to the local engine shop on the other side of the airport
here in Poplar Grove, with instructions to Mag-na-flux (magnetic
particle non-destructive test) the welds. To my surprise they found two
cracks! It was explained to me that when the weld cools, sometimes the
weld area shrinks and "pulls" away from the base metal, thus causing the
crack. I had to go back and grind-out the cracks, and re-weld, then
re-inspect.
href="http://www.matronics.com/Navigator?Pietenpol-List">http://www.mat
r
onics.com/Navigator?Pietenpol-List
href="http://forums.matronics.com">http://forums.matronics.com
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Subject: | off topic vid link |
Oh well it's winter.
Check out the little Cri-Cri
Quite a screamer.
http://www.youtube.com/watch?v=PlV8WJ6N3nU&NR
walt evans
NX140DL
do not archive
"Put your wealth in knowledge, and no one can ever take it from you"
Ben Franklin
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Walt,
Sorry if things were not clear before, although I'm not sure what
didn't make sense. None of what I wrote was ebonics or even shorthand
really. In the interest of true communication, I will "translate" what
I think you are referring to. Here goes.
> Hey gang- that's anyone on the list who reads what I write and
doesn't hate it.
>Planning, gathering, doing building-related-stuff- In other words
reading, researching, daydreaming, and talking the ears off any
builder who would listen to a 'spring chicken' like me.
>Small college student budget- I attend a university whose purpose, it
seems, is to build buildings, sell books, make commercials, sell
merchandise, do research, and occasionally educate me. All of this is
accomplished through student loans and a part-time job which leaves me
with just enough money to buy excuses for why I'm not building fast
enough.
>Doing my part to hold down the average- This refers to the fact that
my age (22) helps hold down the group average and make us all a little
younger by association. Or something like that.
>I'd be happy to keep mine within 50%- Basically I'm way behind the
eight ball when it comes to reducing my own personal 'ballast' but I'm
working on it and it's just as much a part of my project as not adding
other excess weight to the plane. I would like to lose at least 33% of
what I weigh now (i.e. I am 150% of my Goal)
>O-H-I-O! Go Bucks!- If you need help with this one, turn on your tv
around 8pm eastern tonight, observe the TENS of thousands of screaming
Ohio State fans who flew across the country and INVADED Arizona, just
to be CLOSER to a game they don't even have tickets for, to cheer on
their beloved Buckeyes. Then note that for every 50 Scarlet or Gray
fans you see, if your sharp, you might find 1 Florida Gator standing
motionless with their orange and blue covered up mostly, hoping their
team can pull a miracle from their tiny bag of tricks.
> Tim Hansen in "Buckeye Country" - Ohio
________________________________________________________________________
FREE Reminder Service - NEW from AmericanGreetings.com
Click HERE and never forget a Birthday or Anniversary again!
http://track.juno.com/s/lc?s=197335&u=http://www.americangreetings.com/products/online_calendar.pd
Message 27
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Subject: | Re: Weld cracks found |
Jack,
At the moment the right name for the rod leaves my brain. I know that
when I go to the weld shop, it's just the normal,,,Damn,,,I can't think
of it.
My Mentor said NOT to use 4130 filler rod.
The filler rod is the same as Coathanger.
Apparently this is the rod used for official repairs for an AP, this is
what I fabricated my engine mount from, and the landing gear.
( and years ago if you saw me porpoising down the runway on this gear,
you'd marvel at the weld strength)
You buy it by the pound, in different diameters, depending on what
thickness you are welding. Comes copper coated so it won't rust
walt evans
NX140DL
"Put your wealth in knowledge, and no one can ever take it from you"
Ben Franklin
----- Original Message -----
From: Jack T. Textor
To: pietenpol-list@matronics.com
Sent: Monday, January 08, 2007 5:20 PM
Subject: RE: Pietenpol-List: Weld cracks found
Walt,
Can you expand on "common filler rod"? I've heard it's best NOT to
use 4130 filler.
Thanks!
Jack
www.textors.com
I think if 4130 is welded with oxy/act with basic proper cooling,
cracks can virtually never form. I would imagine that your axle was
either
TIG, ed, MIG,ed or stick welded.
You stated that "when the weld cooled" that doesn't happen with torch
welding, the whole thing is red like a cherry, and when left in still
air cools to a normalized condition.
As per my Mentor,,,"weld 4130 with common filler rod with oxy/act,
cool in still air, and you'll never have a problem"
Just walter's 2 cents
walt evans
NX140DL
"Put your wealth in knowledge, and no one can ever take it from you"
Ben Franklin
----- Original Message -----
From: HelsperSew@aol.com
To: pietenpol-list@matronics.com
Sent: Monday, January 08, 2007 10:38 AM
Subject: Pietenpol-List: Weld cracks found
Hi Piet'ers
As of late I have been fabricating my straight axle landing gear. I
elected to use .120" wall thick 1 1/2" O.D. 4130 tube for the axle.
There has been a lot of debate on this subject, of what is sufficient
wall thickness for this axle. After the misfortunate forced landing of
Iccarus Plummet a couple of years ago there was substantial discussion
on this site on the subject. The BHP Flying and Glider plans call for a
12 gauge tube, which equates to .109" wall thickness, so I figure I'm a
little thicker, plus a stronger alloy. Anyway, I welded onto my axle
two 1/2" dia. tubes to act as anti-rotate devices so the axle can't
rotate when the brakes are applied (a-la-Mike Cuy). I then took it over
to the local engine shop on the other side of the airport here in Poplar
Grove, with instructions to Mag-na-flux (magnetic particle
non-destructive test) the welds. To my surprise they found two cracks!
It was explained to me that when the weld cools, sometimes the weld area
shrinks and "pulls" away from the base metal, thus causing the crack. I
had to go back and grind-out the cracks, and re-weld, then re-inspect.
href="http://www.matronics.com/Navigator?Pietenpol-List">http://www.mat
ronics.com/Navigator?Pietenpol-Listhref="http://forums.matronics.com">h
ttp://forums.matronics.com
Message 28
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Tim,
Now I gotcha, but it's about sports.
I've never been an Atheletic Supporter. :^)
walt evans
NX140DL
"Put your wealth in knowledge, and no one can ever take it from you"
Ben Franklin
----- Original Message -----
From: <glich7@juno.com>
Sent: Monday, January 08, 2007 6:10 PM
Subject: Pietenpol-List: average age
>
> Walt,
> Sorry if things were not clear before, although I'm not sure what
> didn't make sense. None of what I wrote was ebonics or even shorthand
> really. In the interest of true communication, I will "translate" what
> I think you are referring to. Here goes.
>
>> Hey gang- that's anyone on the list who reads what I write and
> doesn't hate it.
>
>>Planning, gathering, doing building-related-stuff- In other words
> reading, researching, daydreaming, and talking the ears off any
> builder who would listen to a 'spring chicken' like me.
>
>>Small college student budget- I attend a university whose purpose, it
> seems, is to build buildings, sell books, make commercials, sell
> merchandise, do research, and occasionally educate me. All of this is
> accomplished through student loans and a part-time job which leaves me
> with just enough money to buy excuses for why I'm not building fast
> enough.
>
>>Doing my part to hold down the average- This refers to the fact that
> my age (22) helps hold down the group average and make us all a little
> younger by association. Or something like that.
>
>>I'd be happy to keep mine within 50%- Basically I'm way behind the
> eight ball when it comes to reducing my own personal 'ballast' but I'm
> working on it and it's just as much a part of my project as not adding
> other excess weight to the plane. I would like to lose at least 33% of
> what I weigh now (i.e. I am 150% of my Goal)
>
>>O-H-I-O! Go Bucks!- If you need help with this one, turn on your tv
> around 8pm eastern tonight, observe the TENS of thousands of screaming
> Ohio State fans who flew across the country and INVADED Arizona, just
> to be CLOSER to a game they don't even have tickets for, to cheer on
> their beloved Buckeyes. Then note that for every 50 Scarlet or Gray
> fans you see, if your sharp, you might find 1 Florida Gator standing
> motionless with their orange and blue covered up mostly, hoping their
> team can pull a miracle from their tiny bag of tricks.
>
>> Tim Hansen in "Buckeye Country" - Ohio
>
>
> ________________________________________________________________________
> FREE Reminder Service - NEW from AmericanGreetings.com
> Click HERE and never forget a Birthday or Anniversary again!
> http://track.juno.com/s/lc?s=197335&u=http://www.americangreetings.com/products/online_calendar.pd
>
>
>
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Hi Dick,
I've been looking into the prop thing for a little while now. I know the Sensenich
72 x 42 is kinda the standard for the A-65, but I think just about all of
the planes that use that engine/prop combination are cleaner than the Piet.
I've talked to a few prop builders and I've had three of them say a 74 x 38 or
74 x 40 would be good. I know mine is going the other direction than yours but
I also think each plane is different. Weight is obviously always against climb
and I think other less noticeable things affect it too. Among other things
I think the bluntness of the cowl matters because it affects the useful air
that is entering the prop 'disk'. I pirated and copied an awful lot of things
from Frank Pavliga's Sky Gypsy. Our empty weights are within a pound of each
other! The only real difference is his has the straight axle gear and mine
has the split axle. He is running a Falcon 72 x 44 (I think the Falcon must be
one of the best props out there). I have the Hegy 72 x 44. Even though they
are very very similar I cannot catch him in a climb! On one occasion he even
had his son with him while I was by myself and he took off slightly behind me
and I couldn't get away from him!! Go figure! Then there's that Mike Cuy guy,
he just has to be packing more than 65 hp!
Don Emch
NX899DE
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=86430#86430
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Subject: | Re: Weld cracks found |
Walt,
You are absolutely correct in your assumption. I TIG welded this axle.
Dan Helsper
Helsper Sewing Corp.
8186 Commerce Dr.
Loves Park IL 61111
PH (815) 885-4365
FAX (815) 885-4366
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The prop on NX18235 is a home made copy of a Sensenich 72 - 42. Max
static rpm is 2100, max cruise rpm is ~2250 (giving 80 mph) 200 fpm
climb from a 900' field elevation on an 80 deg. F. day at about 1050
pounds. Did a climb test this past summer and the climb rate at 6000 msl
was equal to the climb rate passing through 2000' msl. 35 minutes after
launching I was passing through 8000' and getting too cold to continue.
The low rpm might be due to the leading edge of the prop being too
blunt. It has just been recarved.
Greg Cardinal
----- Original Message -----
From: Dick Navratil
To: pietenpol-list@matronics.com
Sent: Sunday, January 07, 2007 10:48 PM
Subject: Pietenpol-List: prop
I was just sitting in front of the t.v. paging thru the Wicks
cataloug. I happened to spot on pages 283-284, items called a "Prop
Kit". They are a Vortelator device that clain to add 20-50 rpm and
increase speed. Has anyone tried one of these? Any power increase with
an A-65 would help.
Also, I just read the post by Don Emch. I run a Senenich 72-42. His
numbers are much better than mine for climb and speed. Does anyone else
have a similar prop?
Don, do you get a full static run up with that prop? I don't care
about the speed but your climb is better than my 200-250 fpm.
Dick N.
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Don
You climb rate is so much better than mine that I would consider switching
props.
Dick N.
----- Original Message -----
From: "Don Emch" <EmchAir@aol.com>
Sent: Monday, January 08, 2007 6:12 PM
Subject: Pietenpol-List: Re: prop
>
> Hi Dick,
> I've been looking into the prop thing for a little while now. I know the
> Sensenich 72 x 42 is kinda the standard for the A-65, but I think just
> about all of the planes that use that engine/prop combination are cleaner
> than the Piet. I've talked to a few prop builders and I've had three of
> them say a 74 x 38 or 74 x 40 would be good. I know mine is going the
> other direction than yours but I also think each plane is different.
> Weight is obviously always against climb and I think other less noticeable
> things affect it too. Among other things I think the bluntness of the
> cowl matters because it affects the useful air that is entering the prop
> 'disk'. I pirated and copied an awful lot of things from Frank Pavliga's
> Sky Gypsy. Our empty weights are within a pound of each other! The only
> real difference is his has the straight axle gear and mine has the split
> axle. He is running a Falcon 72 x 44 (I think the Falcon must be one of
> the best props out there). I have the Hegy!
> 72 x 44. Even though they are very very similar I cannot catch him in a
> climb! On one occasion he even had his son with him while I was by myself
> and he took off slightly behind me and I couldn't get away from him!! Go
> figure! Then there's that Mike Cuy guy, he just has to be packing more
> than 65 hp!
> Don Emch
> NX899DE
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=86430#86430
>
>
>
Message 33
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Hi Dick,
I would try to borrow one before I bought. Theoretically you should get better
climb with with a lower pitch. If you are very serious about buying I would
talk to some custom prop builders and based on information that you give them
they can tailor one to suit you. A few of these guys are;
Culver Props
St. Croix Props
Sterba Props
I don't have their info. close by but I know they all have websites and I have
personally talked with them. Ed Sterba actually carves each one by hand and can
make virtually make almost any profile.
Another thing to pay attention to is that a 72 x 42 from one company is not necessarily
a 72 x 42 from another company. Then there are different airfoils, shapes,
chords, etc. It almost hurts when you start to think just how different
one make of prop could be from another make!
Good Luck!
Don Emch
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=86474#86474
Message 34
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Subject: | Re: Weld cracks found |
Yep, TIG and 4130 is a no, no.
Without normalizing.
walt evans
NX140DL
"Put your wealth in knowledge, and no one can ever take it from you"
Ben Franklin
----- Original Message -----
From: HelsperSew@aol.com
To: pietenpol-list@matronics.com
Sent: Monday, January 08, 2007 7:43 PM
Subject: Re: Pietenpol-List: Weld cracks found
Walt,
You are absolutely correct in your assumption. I TIG welded this
axle.
Dan Helsper
Helsper Sewing Corp.
8186 Commerce Dr.
Loves Park IL 61111
PH (815) 885-4365
FAX (815) 885-4366
Message 35
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Subject: | Re: builders ages |
So which is going to be cheaper, shortening the engine
mount, or a new set of wing struts? :-) :-)
Clif
----- Original Message -----
From: harvey.rule@bell.ca
To: pietenpol-list@matronics.com
Sent: Monday, January 08, 2007 9:56 AM
Subject: RE: Pietenpol-List: builders ages
YAYA tell me about it. I feel every time I get into my plane that I am
putting it on rather than getting in! I weigh 200lbs now and I plan on
loosing a further 50lbs but Christmas holidays have not helped in the
area one bit! I should be 140lbs for my 5'3" frame but I will be quite
happy with being 150.I just know that if I loose the 50lbs I will get up
to 90 mph out of the 80 hp Franklin as well or at least so I've been
told and I don't want to burst their bubble. I'd like to prove them
right.
Do not archive
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From: owner-pietenpol-list-server@matronics.com
[mailto:owner-pietenpol-list-server@matronics.com] On Behalf Of
HelsperSew@aol.com
Sent: January 8, 2007 12:42 PM
To: pietenpol-list@matronics.com
Subject: Re: Pietenpol-List: builders ages
Mike,
You guys that have the waistlines progressing with your
age.........Sorry to be the one to tell you this................at risk
of stating the obvious......................................YOU ARE
GETTING ABOUT 5 LBS CLOSER TO THE MAX GROSS WEIGHT WITH EACH PASSING
YEAR! (INCH)
Dan Helsper
Poplar Grove, IL.
149 Lbs :)
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1/8/2007 4:12 PM
Message 36
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As a builder who is 55, I am far less by waistline than the previously
mentioned waistlines, but now I am curious about the useful load, and
what
(lbs) is allowed in the back seat for proper CG. Any comments or clues,
or
better yet graphs and operators manual info...?
Rob Stapleton,
Anchorage, Alaska
-----Original Message-----
From: owner-pietenpol-list-server@matronics.com
[mailto:owner-pietenpol-list-server@matronics.com] On Behalf Of Clif
Dawson
Sent: Monday, January 08, 2007 9:20 PM
Subject: Re: Pietenpol-List: builders ages
So which is going to be cheaper, shortening the engine
mount, or a new set of wing struts? :-) :-)
Clif
----- Original Message -----
From: harvey.rule@bell.ca
Sent: Monday, January 08, 2007 9:56 AM
Subject: RE: Pietenpol-List: builders ages
YAYA tell me about it. I feel every time I get into my plane that I am
putting it on rather than getting in! I weigh 200lbs now and I plan on
loosing a further 50lbs but Christmas holidays have not helped in the
area
one bit! I should be 140lbs for my 5'3" frame but I will be quite happy
with
being 150.I just know that if I loose the 50lbs I will get up to 90 mph
out
of the 80 hp Franklin as well or at least so I've been told and I don't
want
to burst their bubble. I'd like to prove them right.
Do not archive
_____
From: owner-pietenpol-list-server@matronics.com
[mailto:owner-pietenpol-list-server@matronics.com] On Behalf Of
HelsperSew@aol.com
Sent: January 8, 2007 12:42 PM
Subject: Re: Pietenpol-List: builders ages
Mike,
You guys that have the waistlines progressing with your
age.........Sorry to
be the one to tell you this................at risk of stating the
obvious......................................YOU ARE GETTING ABOUT 5 LBS
CLOSER TO THE MAX GROSS WEIGHT WITH EACH PASSING YEAR! (INCH)
Dan Helsper
Poplar Grove, IL.
149 Lbs :)
href="http://www.matronics.com/Navigator?Pietenpol-List">http://www.mat
ronic
s.com/Navigator?Pietenpol-List
href="http://forums.matronics.com">http://forums.matronics.com
_____
Message 37
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Subject: | Re: Weld cracks found |
When you weld you are eliminating all the heat treating
that the steel went through to give it all that strength
and reducing it back to 90'000 lb tensile. That's why
you're supposed to splice two tubes with a fishmouth
joint. Instead of the area of a circle you now have a
much larger area of weld. And no, normalizing is not
heat treating.
So you want to use a rod that already has that softer
material. It can't harden no matter how fast or slow the
weld cools and thus won't crack. That doesn't give you
permission to cool the weld with anything though, like
water or a fan or even just a cool breeze. That will
cause cracks in the rapidly cooling 4130 outside the
weld.
You can use a coat hanger for non life supporting
stuff in a pinch but you don't know where it's been. :-)
The normal everyday rod from your welding supplier
is the stuff you want.
Clif
----- Original Message -----
From: walt evans
To: pietenpol-list@matronics.com
Sent: Monday, January 08, 2007 3:15 PM
Subject: Re: Pietenpol-List: Weld cracks found
Jack,
At the moment the right name for the rod leaves my brain. I know that
when I go to the weld shop, it's just the normal,,,Damn,,,I can't think
of it.
My Mentor said NOT to use 4130 filler rod.
The filler rod is the same as Coathanger.
Apparently this is the rod used for official repairs for an AP, this
is what I fabricated my engine mount from, and the landing gear.
( and years ago if you saw me porpoising down the runway on this gear,
you'd marvel at the weld strength)
You buy it by the pound, in different diameters, depending on what
thickness you are welding. Comes copper coated so it won't rust
walt evans
NX140DL
"Put your wealth in knowledge, and no one can ever take it from you"
Ben Franklin
----- Original Message -----
From: Jack T. Textor
To: pietenpol-list@matronics.com
Sent: Monday, January 08, 2007 5:20 PM
Subject: RE: Pietenpol-List: Weld cracks found
Walt,
Can you expand on "common filler rod"? I've heard it's best NOT to
use 4130 filler.
Thanks!
Jack
www.textors.com
I think if 4130 is welded with oxy/act with basic proper cooling,
cracks can virtually never form. I would imagine that your axle was
either
TIG, ed, MIG,ed or stick welded.
You stated that "when the weld cooled" that doesn't happen with
torch welding, the whole thing is red like a cherry, and when left in
still air cools to a normalized condition.
As per my Mentor,,,"weld 4130 with common filler rod with oxy/act,
cool in still air, and you'll never have a problem"
Just walter's 2 cents
walt evans
NX140DL
"Put your wealth in knowledge, and no one can ever take it from you"
Ben Franklin
----- Original Message -----
From: HelsperSew@aol.com
To: pietenpol-list@matronics.com
Sent: Monday, January 08, 2007 10:38 AM
Subject: Pietenpol-List: Weld cracks found
Hi Piet'ers
As of late I have been fabricating my straight axle landing gear.
I elected to use .120" wall thick 1 1/2" O.D. 4130 tube for the axle.
There has been a lot of debate on this subject, of what is sufficient
wall thickness for this axle. After the misfortunate forced landing of
Iccarus Plummet a couple of years ago there was substantial discussion
on this site on the subject. The BHP Flying and Glider plans call for a
12 gauge tube, which equates to .109" wall thickness, so I figure I'm a
little thicker, plus a stronger alloy. Anyway, I welded onto my axle
two 1/2" dia. tubes to act as anti-rotate devices so the axle can't
rotate when the brakes are applied (a-la-Mike Cuy). I then took it over
to the local engine shop on the other side of the airport here in Poplar
Grove, with instructions to Mag-na-flux (magnetic particle
non-destructive test) the welds. To my surprise they found two cracks!
It was explained to me that when the weld cools, sometimes the weld area
shrinks and "pulls" away from the base metal, thus causing the crack. I
had to go back and grind-out the cracks, and re-weld, then re-inspect.
href="http://www.matronics.com/Navigator?Pietenpol-List">http://www.mat
ronics.com/Navigator?Pietenpol-Listhref="http://forums.matronics.com">h
ttp://forums.matronics.com
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ronics.com/Navigator?Pietenpol-List
href="http://forums.matronics.com">http://forums.matronics.com
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1/8/2007 4:12 PM
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