Today's Message Index:
----------------------
1. 04:18 AM - Re: straight axle hub info (Jack Phillips)
2. 07:07 AM - Re: Turtle Deck (Jerry Dotson)
3. 07:20 AM - New Pictures (Jack)
4. 08:03 AM - Re: Re: Turtle Deck (Jack)
5. 08:57 AM - Re: straight axle hub info (Skip Gadd)
6. 09:59 AM - Re: straight axle hub info (Richard Schreiber)
7. 11:17 AM - Made my leather coaming padding today (helspersew@aol.com)
8. 11:46 AM - Leather coaming procedure, pg 3 (helspersew@aol.com)
9. 11:50 AM - Re: Made my leather coaming padding today (Jack)
10. 11:55 AM - Re: Made my leather coaming padding today (Gary Boothe)
11. 11:55 AM - Leather coaming procedure, pg. 2, cont. (helspersew@aol.com)
12. 11:56 AM - Leather coaming- last page (helspersew@aol.com)
13. 12:11 PM - Re: Made my leather coaming padding today (Tim Willis)
14. 12:11 PM - Re: Leather coaming- last page (H RULE)
15. 12:50 PM - Made my leather coaming padding today (santiago morete)
16. 12:51 PM - Re: Leather coaming- last page (jboatri@emory.edu)
17. 01:36 PM - Re: Leather coaming procedure, pg 3 (Jack Phillips)
18. 01:47 PM - Yey another turtle-deck question (Jack)
19. 01:55 PM - Re: Leather coaming- last page (Jack)
20. 02:24 PM - Re: Yey another turtle-deck question (chase143(at)aol.com)
21. 02:32 PM - Re: Yey another turtle-deck question (Jerry Dotson)
22. 02:47 PM - Looking for the Riblett letter.. (Mark Roberts)
23. 02:54 PM - Re: Yes another turtle-deck question (Gary Boothe)
24. 03:49 PM - Re: Looking for the Riblett letter.. (Ryan Mueller)
25. 06:02 PM - Re: Looking for the Riblett letter.. (Don Emch)
26. 06:48 PM - aileron horns (Douwe Blumberg)
27. 07:50 PM - Re: Looking for the Riblett letter.. (Mark Roberts)
28. 07:55 PM - Re: Re: Looking for the Riblett letter.. (Mark Roberts)
29. 08:06 PM - Re: Re: Looking for the Riblett letter.. (gcardinal)
30. 08:48 PM - Re: Re: Looking for the Riblett letter.. (Ryan Mueller)
Message 1
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| Subject: | straight axle hub info |
Rick,
Why not ask Buchanan's? I'm sure they could tell you what they prefer.
Here is a detail from the drawings I made for my hubs. I sent these hubs to
Buchanan's and they made custom spokes and laced them for me. I dod not
know what the gage on the spoke wire is, but they have worked just fine.
Jack Phillips
NX899JP
Raleigh, NC
_____
From: owner-pietenpol-list-server@matronics.com
[mailto:owner-pietenpol-list-server@matronics.com] On Behalf Of Richard
Schreiber
Sent: Saturday, February 06, 2010 8:24 PM
Subject: Pietenpol-List: straight axle hub info
Fellow Pieters:
for those that have made the straight axle gear using the
Henderson/Pavliga/Perkins style hubs, what size holes did you drill in the
hubs for your spokes. I realize it is spoke size dependent, but my plans are
to go with 9 ga. spokes from Buchanan's. I want to make sure that the hubs
that I send to them are drilled correctly.
Rick Schreiber
Valparaiso, IN
Message 2
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Jack you and I are near the same stage of construction on the fuselage. Looking
good. I did like you and fitted the bottom side. I'm not trying to steal your
thread...just didn't want to start another.
--------
Jerry Dotson
59 Daniel Johnson Rd
Baker, FL 32531
Started building NX510JD July, 2009
Ribs and tailfeathers done
using Lycoming O-235
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=285207#285207
Attachments:
http://forums.matronics.com//files/a61_182.jpg
Message 3
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Just updated my site with some new fuselage pictures. Hope it helps those
at that stage.
Jack
DSM
www.textors.com <http://www.textors.com/>
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Yea Jerry don't be messing with my thread. :) I still have a lot of
trimming and adjusting to do but it's nice to get the deck started. If my
IPod Google is correct you have a beautiful spread down there. Looks like
room for a great runway. Next time we are heading down to Destin, we may
have to stop by. Do you have a website?
Take care,
Jack
DSM
Do not archive
Jack you and I are near the same stage of construction on the fuselage.
Looking good. I did like you and fitted the bottom side. I'm not trying to
steal your thread...just didn't want to start another.
--------
Jerry Dotson
59 Daniel Johnson Rd
Baker, FL 32531
Started building NX510JD July, 2009
Ribs and tailfeathers done
using Lycoming O-235
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=285207#285207
Attachments:
http://forums.matronics.com//files/a61_182.jpg
Message 5
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| Subject: | straight axle hub info |
Rick,
I used Buchanan's 9-10 ga SS spokes, they are about .140 tho. I drilled 3/16 holes
which is about .185 tho. With the chamfer on both edges of the hole it was
easy to lace the wheels.
Skip
Fellow Pieters:
for those that have made the straight axle gear using the Henderson/Pavliga/Perkins
style hubs, what size holes did you drill in the hubs for your spokes. I
realize it is spoke size dependent, but my plans are to go with 9 ga. spokes from
Buchanan's. I want to make sure that the hubs that I send to them are drilled
correctly.
Rick Schreiber
Valparaiso, IN
Message 6
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| Subject: | straight axle hub info |
Jack and Skip,
Thanks for the response. I tried calling Bucanan's Saturday, but only got a voicemail.
I will either try e-mail or call them again tomorrow.
Rick Schreiber
----- Original Message -----
From: Jack Phillips
Sent: 2/7/2010 6:21:53 AM
Subject: RE: Pietenpol-List: straight axle hub info
Rick,
Why not ask Buchanans? Im sure they could tell you what they prefer.
Here is a detail from the drawings I made for my hubs. I sent these hubs to Buchanans
and they made custom spokes and laced them for me. I dod not know what
the gage on the spoke wire is, but they have worked just fine.
Jack Phillips
NX899JP
Raleigh, NC
From: owner-pietenpol-list-server@matronics.com [mailto:owner-pietenpol-list-server@matronics.com] On Behalf Of Richard Schreiber
Sent: Saturday, February 06, 2010 8:24 PM
Subject: Pietenpol-List: straight axle hub info
Fellow Pieters:
for those that have made the straight axle gear using the Henderson/Pavliga/Perkins
style hubs, what size holes did you drill in the hubs for your spokes. I
realize it is spoke size dependent, but my plans are to go with 9 ga. spokes from
Buchanan's. I want to make sure that the hubs that I send to them are drilled
correctly.
Rick Schreiber
Valparaiso, IN
http://www.matronics.com/Navigator?Pietenpol-List
http://forums.matronics.com
http://www.matronics.com/contribution
Message 7
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| Subject: | Made my leather coaming padding today |
Hello good people,
I have completed my leather cockpit coaming, after much frustration and co
nsternation. I finally came up with a very nice looking result, and I beli
eve much easier method than what others have done. Basically the procedure
is, to take the correct lenth pipe insulation (Home Depot)(sections glued
together) and using spray adhesive (3M Foamfast 74 from Grainger), glue
leather to pipe insulation, install grommets, and lace onto airplane. I
will send photos of this procedure in the next few posts.-- Dan Helsper
Leather is marked along edge to make a glued hem on two long edges.
Spray on adhesive and then fold up hems on both long edges.
Message 8
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| Subject: | Leather coaming procedure, pg 3 |
Let this dry for about 1/2 hour.
Next, split polyethelene tubing and apply to raw edge of aluminum. I used
a few pieces of safety wire to hold it on, covered by black duct tape.
I did a trial fit at this point so I could get a final length and sew it
into the circle I needed.
Now locate and drill 3/16 holes for lacing.
Message 9
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| Subject: | Made my leather coaming padding today |
Great Dan, thanks!
Do not archive
_____
From: owner-pietenpol-list-server@matronics.com
[mailto:owner-pietenpol-list-server@matronics.com] On Behalf Of
helspersew@aol.com
Sent: Sunday, February 07, 2010 1:11 PM
Subject: Pietenpol-List: Made my leather coaming padding today
Hello good people,
I have completed my leather cockpit coaming, after much frustration and
consternation. I finally came up with a very nice looking result, and I
believe much easier method than what others have done. Basically the
procedure is, to take the correct lenth pipe insulation (Home
Depot)(sections glued together) and using spray adhesive (3M Foamfast 74
from Grainger), glue leather to pipe insulation, install grommets, and lace
onto airplane. I will send photos of this procedure in the next few posts.--
Dan Helsper
Cockpitcoamingleatherpadding038.jpg picture by dhelsper
<http://i564.photobucket.com/albums/ss83/dhelsper/Cockpitcoamingleatherpaddi
ng038.jpg?t=1265568805>
Leather is marked along edge to make a glued hem on two long edges.
Cockpitcoamingleatherpadding042.jpg picture by dhelsper
<http://i564.photobucket.com/albums/ss83/dhelsper/Cockpitcoamingleatherpaddi
ng042.jpg?t=1265569511>
Spray on adhesive and then fold up hems on both long edges.
Cockpitcoamingleatherpadding043.jpg picture by dhelsper
<http://i564.photobucket.com/albums/ss83/dhelsper/Cockpitcoamingleatherpaddi
ng043.jpg?t=1265569622>
Message 10
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| Subject: | Made my leather coaming padding today |
.looking forward to that next set of pics!!!
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
helspersew@aol.com
Sent: Sunday, February 07, 2010 11:11 AM
Subject: Pietenpol-List: Made my leather coaming padding today
Hello good people,
I have completed my leather cockpit coaming, after much frustration and
consternation. I finally came up with a very nice looking result, and I
believe much easier method than what others have done. Basically the
procedure is, to take the correct lenth pipe insulation (Home
Depot)(sections glued together) and using spray adhesive (3M Foamfast 74
from Grainger), glue leather to pipe insulation, install grommets, and lace
onto airplane. I will send photos of this procedure in the next few posts.--
Dan Helsper
Cockpitcoamingleatherpadding038.jpg picture by dhelsper
<http://i564.photobucket.com/albums/ss83/dhelsper/Cockpitcoamingleatherpaddi
ng038.jpg?t=1265568805>
Leather is marked along edge to make a glued hem on two long edges.
Cockpitcoamingleatherpadding042.jpg picture by dhelsper
<http://i564.photobucket.com/albums/ss83/dhelsper/Cockpitcoamingleatherpaddi
ng042.jpg?t=1265569511>
Spray on adhesive and then fold up hems on both long edges.
Cockpitcoamingleatherpadding043.jpg picture by dhelsper
<http://i564.photobucket.com/albums/ss83/dhelsper/Cockpitcoamingleatherpaddi
ng043.jpg?t=1265569622>
Message 11
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| Subject: | Leather coaming procedure, pg. 2, cont. |
Next, punch holes and install grommets. I used size 00 (black oxide finish
) grommets.
Next, mask-off grommeted edges and far ends of leather, and suspend foam
with copper pipe, to facilitate spraying of glue.
After spraying glue on leather and foam, wait for tack, then carefully dro
p foam down on to the center of leather, rolling in each direction to get
nice wrinkle-free roll.
Message 12
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| Subject: | Leather coaming- last page |
A slight bit of wrinkling is evident in the curves, but it is very uniform
and goes good with my "distressed" leather. I used round leather lacing
cord I bought on line from Leather Cord USA.
Lacing, about 1/2 way done. Originally my coaming metal stopped at the pil
ot back rest, but I added a piece to get more of a true "pit" look.
Hope this info helps somebody.
Dan Helsper
Poplar Grove, IL.
Message 13
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| Subject: | Re: Made my leather coaming padding today |
Dan,
Great series of explanations and pix. Thanks. I will do it just that way, except
that I will be stopping at the backrest.
Tim in central TX
do not archive
-----Original Message-----
From: helspersew@aol.com
Sent: Feb 7, 2010 2:11 PM
Subject: Pietenpol-List: Made my leather coaming padding today
Hello good people,
I have completed my leather cockpit coaming, after much frustration and consternation.
I finally came up with a very nice looking result, and I believe much
easier method than what others have done. Basically the procedure is, to take
the correct lenth pipe insulation (Home Depot)(sections glued together) and using
spray adhesive (3M Foamfast 74 from Grainger), glue leather to pipe insulation,
install grommets, and lace onto airplane. I will send photos of this procedure
in the next few posts.-- Dan Helsper
Leather is marked along edge to make a glued hem on two long edges.
Spray on adhesive and then fold up hems on both long edges.
Message 14
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| Subject: | Re: Leather coaming- last page |
real nice work!=0Ado not archive=0A=0A=0A=0A=0A____________________________
____=0AFrom: "helspersew@aol.com" <helspersew@aol.com>=0ATo: pietenpol-list
@matronics.com=0ASent: Sun, February 7, 2010 2:48:21 PM=0ASubject: Pietenpo
l-List: Leather coaming- last page=0A=0A=0A=0AA slight bit of wrinkling is
evident in the curves, but it is very uniform and goes good with my "distre
ssed" leather. I used round leather lacing cord I bought on line from Leath
er Cord USA.=0A=0A=0A=0ALacing, about 1/2 way done. Originally my coaming m
etal stopped at the pilot back rest, but I added a piece to get more of a t
rue "pit" look.=0A=0AHope this info helps somebody.=0A=0ADan Helsper=0APopl
=====
Message 15
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| Subject: | Made my leather coaming padding today |
Congratulations Dan!- Beautiful work!!!!!!!!!!!!!
Saludos
-
Santiago
-=0A=0A=0A Yahoo! Cocina=0A=0AEncontra las mejores recetas con Yahoo
! Cocina.=0A=0A=0Ahttp://ar.mujer.yahoo.com/cocina/
Message 16
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| Subject: | Re: Leather coaming- last page |
Unbelievably, almost painfully, beautiful workmanship.
Message 17
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| Subject: | Leather coaming procedure, pg 3 |
I like it, Dan! That looks much easier than the method I used.
Jack Phillips
NX899JP
Raleigh, NC
_____
From: owner-pietenpol-list-server@matronics.com
[mailto:owner-pietenpol-list-server@matronics.com] On Behalf Of
helspersew@aol.com
Sent: Sunday, February 07, 2010 2:39 PM
Subject: Pietenpol-List: Leather coaming procedure, pg 3
Let this dry for about 1/2 hour.
Cockpitcoamingleatherpadding052.jpg picture by dhelsper
<http://i564.photobucket.com/albums/ss83/dhelsper/Cockpitcoamingleatherpaddi
ng052.jpg?t=1265571040>
Cockpitcoamingleatherpadding053.jpg picture by dhelsper
<http://i564.photobucket.com/albums/ss83/dhelsper/Cockpitcoamingleatherpaddi
ng053.jpg?t=1265571103>
Next, split polyethelene tubing and apply to raw edge of aluminum. I used a
few pieces of safety wire to hold it on, covered by black duct tape.
Cockpitcoamingleatherpadding024.jpg picture by dhelsper
<http://i564.photobucket.com/albums/ss83/dhelsper/Cockpitcoamingleatherpaddi
ng024.jpg?t=1265571171>
I did a trial fit at this point so I could get a final length and sew it
into the circle I needed.
Now locate and drill 3/16 holes for lacing.
Cockpitcoamingleatherpadding013.jpg picture by dhelsper
<http://i564.photobucket.com/albums/ss83/dhelsper/Cockpitcoamingleatherpaddi
ng013.jpg?t=1265571333>
Message 18
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| Subject: | Yey another turtle-deck question |
>From pictures it looks like some leave their stringers square and other
round out the tops. I would appreciate thoughts on the best way to go so
the fabric will look pleasing.
Thanks,
Jack
Jack Textor
29 SW 58th Drive
Des Moines, IA 50312
www.textors.com
Message 19
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| Subject: | Leather coaming- last page |
Dan,
A piece of art, beautiful coaming and panel! That's the way I plan to do
it..
Jack
DSM
Do not archive
Jack Textor
29 SW 58th Drive
Des Moines, IA 50312
www.textors.com
_____
From: owner-pietenpol-list-server@matronics.com
[mailto:owner-pietenpol-list-server@matronics.com] On Behalf Of
helspersew@aol.com
Sent: Sunday, February 07, 2010 1:48 PM
Subject: Pietenpol-List: Leather coaming- last page
A slight bit of wrinkling is evident in the curves, but it is very uniform
and goes good with my "distressed" leather. I used round leather lacing cord
I bought on line from Leather Cord USA.
Cockpitcoamingleatherpadding025.jpg picture by dhelsper
<http://i564.photobucket.com/albums/ss83/dhelsper/Cockpitcoamingleatherpaddi
ng025.jpg?t=1265571664>
Cockpitcoamingleatherpadding034.jpg picture by dhelsper
<http://i564.photobucket.com/albums/ss83/dhelsper/Cockpitcoamingleatherpaddi
ng034.jpg?t=1265571904>
Lacing, about 1/2 way done. Originally my coaming metal stopped at the pilot
back rest, but I added a piece to get more of a true "pit" look.
Hope this info helps somebody.
Dan Helsper
Poplar Grove, IL.
Message 20
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| Subject: | Re: Yey another turtle-deck question |
Hello Jack,
I am another "rounding person" (have not covered yet) based on several recommendations,
and looking at completed versions. Also, I asked for a recommendation
fro the instructor when taking the Poly-fiber covering class, and they recommended
rounding, as a general rule, whenever possible. Just another opinion.
Cheers,
Steve
www.mypiet.com
--------
Steve
www.mypiet.com
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=285262#285262
Message 21
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| Subject: | Re: Yey another turtle-deck question |
Jack I rounded because I don't plan on taping them before covering. If you choose
to leave them with sharp corners I would for sure tape over them.
--------
Jerry Dotson
59 Daniel Johnson Rd
Baker, FL 32531
Started building NX510JD July, 2009
Ribs and tailfeathers done
using Lycoming O-235
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=285263#285263
Message 22
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| Subject: | Looking for the Riblett letter.. |
Hey Guys:
I've just spent the last hour or so perusing the archives for something i
remember seeing last year but now can't find. I thought it was posted on the
forum, but it could have been on someone's website and I just missed it...
It was a letter frn Harry Riblett on the analysis of teh original Piet
airfoil (FC-10) and it's stall characteristics. If I remember correctly, it
was a posted photocopy of the letter he wrote back to Piety Lowell regarding
his selection of the 613.5 and 612 as better airfoils from his analysis.
I wanted to re-read this again, but couldn't find it on the archives,
searching from the beginning to end for 'Riblett'. Anyone with a better
memory than me?
Thanks guys...
Mark
Message 23
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| Subject: | Yes another turtle-deck question |
Jack,
Pretty sure the edges should be sanded slightly, at least. After that, and
with all the reinforcing tapes, I doubt whether one looks better than
another.and ALL look fantastic at 75mph and 500agl. JMO (Just My Opinion)
Gary Boothe
Cool, CA
Pietenpol
WW Corvair Conversion
Tail done, Fuselage on gear
16 ribs done
From: owner-pietenpol-list-server@matronics.com
[mailto:owner-pietenpol-list-server@matronics.com] On Behalf Of Jack
Sent: Sunday, February 07, 2010 1:43 PM
Subject: Pietenpol-List: Yey another turtle-deck question
>From pictures it looks like some leave their stringers square and other
round out the tops. I would appreciate thoughts on the best way to go so
the fabric will look pleasing.
Thanks,
Jack
Jack Textor
29 SW 58th Drive
Des Moines, IA 50312
www.textors.com
Message 24
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| Subject: | Re: Looking for the Riblett letter.. |
Mark,
I think this is what you may be looking for:
[image:
?ui=2&view=att&th=126aacb935f40d2d&attid=0.1&disp=attd&realattid=ii_126aacb935f40d2d&zw]
If the image doesn't come through, here's a link to the file:
http://dl.dropbox.com/u/2314248/riblett%20letter.jpg
Have a good evening,
Ryan
On Sun, Feb 7, 2010 at 4:44 PM, Mark Roberts <mark.rbrts1@gmail.com> wrote:
> Hey Guys:
>
> I've just spent the last hour or so perusing the archives for something i
> remember seeing last year but now can't find. I thought it was posted on the
> forum, but it could have been on someone's website and I just missed it...
>
> It was a letter frn Harry Riblett on the analysis of teh original Piet
> airfoil (FC-10) and it's stall characteristics. If I remember correctly, it
> was a posted photocopy of the letter he wrote back to Piety Lowell regarding
> his selection of the 613.5 and 612 as better airfoils from his analysis.
>
> I wanted to re-read this again, but couldn't find it on the archives,
> searching from the beginning to end for 'Riblett'. Anyone with a better
> memory than me?
>
> Thanks guys...
>
> Mark
>
> *
>
> *
>
>
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| Subject: | Re: Looking for the Riblett letter.. |
Mark,
This is the first time I've seen this letter. I'm very certain Mr. Riblett is
very knowledgeable on his designs, but I have to disagree with him on his comments
about Mr. Pietenpol's airfoil. My Piet by no means has a sharp stall. It
is very benign and very predictable. It is also very very slow, especially
with a touch of power. The most surprising part of the letter is "Indeed, due
to safety considerations, we strongly recommend this substitution." I could
see if the Pietenpol had been plagued with stall accidents over the past 80 years,
but it really hasn't. If there had been any complaints about a bad stall
characteristic, which I've never heard, it was probably due to a rearward cg,
which some Piets have. Please don't let anyone fool you. A properly built Pietenpol
is a safe, docile, honest, and FUN airplane!
I was all set to fly this weekend with the skis, but that 6" to 8" of snow we were
forcasted to get turned into 26"!! Little too deep!
Don Emch
NX899DE
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=285280#285280
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My horns are flat stock, angled to line up with the cable.
I think if something is just bugging you, and it doesn't go away, then you
should probably take the time to re-do it. With all the other things to
look at on a beautiful Piet, I don't really notice control horns, but ...
that might be all you notice on your baby if you don't fix it.
Douwe
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| Subject: | Re: Looking for the Riblett letter.. |
Hey Ryan!
This is EXACTLY the one I remember seeing, and could not locate it for the
life of me. THANKS brother!
I also remember reading somewhere that Mr. Riblett had recommended the 613.5
over the 612, and I thought that was in this letter, but after reading it I
don't see it mentioned... Anyone remember if this is the case, or is my
memory beginning to play tricks on me...?
Thanks again Ryan.
Mark
On Sun, Feb 7, 2010 at 3:38 PM, Ryan Mueller <rmueller23@gmail.com> wrote:
> Mark,
>
> I think this is what you may be looking for:
>
> [image:
> ?ui=2&view=att&th=126aacb935f40d2d&attid=0.1&disp=attd&realattid=ii_126aacb935f40d2d&zw]
>
> If the image doesn't come through, here's a link to the file:
> http://dl.dropbox.com/u/2314248/riblett%20letter.jpg
>
> Have a good evening,
>
> Ryan
>
>
> On Sun, Feb 7, 2010 at 4:44 PM, Mark Roberts <mark.rbrts1@gmail.com>wrote:
>
>> Hey Guys:
>>
>> I've just spent the last hour or so perusing the archives for something i
>> remember seeing last year but now can't find. I thought it was posted on the
>> forum, but it could have been on someone's website and I just missed it...
>>
>> It was a letter frn Harry Riblett on the analysis of teh original Piet
>> airfoil (FC-10) and it's stall characteristics. If I remember correctly, it
>> was a posted photocopy of the letter he wrote back to Piety Lowell regarding
>> his selection of the 613.5 and 612 as better airfoils from his analysis.
>>
>> I wanted to re-read this again, but couldn't find it on the archives,
>> searching from the beginning to end for 'Riblett'. Anyone with a better
>> memory than me?
>>
>> Thanks guys...
>>
>> Mark
>>
>> *
>>
>> " target="_blank">http://www.matronics.com/Navigator?Pietenpol-List
>> tp://forums.matronics.com
>> _blank">http://www.matronics.com/contribution
>> *
>>
>>
>
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| Subject: | Re: Looking for the Riblett letter.. |
Oh Man! 26" of snow! It's one thing to read about the news and think "those
poor saps!" It's another to know one of "those poor saps!" I hope you dig
out soon!
I appreciate your comments about the original Piet airfoil. I know this
topic has seen quite a bit of discussion over the years (the earliest posts
I saw were from '98 or '99), and I wasn't trying to kick over the safety
issue again, although I do appreciate the comments.
My thought was what Riblett said about the contrast of the 2 airfoils. I did
not remember some of the issues involved. I know for me, at 6'4" and
"two-hundred-and-none-your-business" fat pounds (Ok, 245 lbs with no clothes
to cover the natural good looks of my fat), I am building the 613.5 because
I remember seeing something that said it would have better lifting power in
hot weather, something we get nothing BUT in the summers in Central
California.
As I see it, a design that has stood the test of over 80 years is not
something you make great changes to unless there is a specific need (as in
making the cockpit fit yer body, and making the wing better for your
weight). Some would even argue that if that is the issue, find a plane that
fits better. But after some 20 years of looking, this one meets almost all
the criteria I need most: build at your own pay-comfort level, reliable,
LSA, 2 seats and cool looking (well, cool enuf!)
Thanks for the feedback!
Mark
On Sun, Feb 7, 2010 at 6:00 PM, Don Emch <EmchAir@aol.com> wrote:
>
> Mark,
>
> This is the first time I've seen this letter. I'm very certain Mr. Riblett
> is very knowledgeable on his designs, but I have to disagree with him on his
> comments about Mr. Pietenpol's airfoil. My Piet by no means has a sharp
> stall. It is very benign and very predictable. It is also very very slow,
> especially with a touch of power. The most surprising part of the letter is
> "Indeed, due to safety considerations, we strongly recommend this
> substitution." I could see if the Pietenpol had been plagued with stall
> accidents over the past 80 years, but it really hasn't. If there had been
> any complaints about a bad stall characteristic, which I've never heard, it
> was probably due to a rearward cg, which some Piets have. Please don't let
> anyone fool you. A properly built Pietenpol is a safe, docile, honest, and
> FUN airplane!
>
> I was all set to fly this weekend with the skis, but that 6" to 8" of snow
> we were forcasted to get turned into 26"!! Little too deep!
>
> Don Emch
> NX899DE
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=285280#285280
>
>
Message 29
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| Subject: | Re: Looking for the Riblett letter.. |
I concur with everything Don Says. There is no sharp stall issue. Power off
with the stick way back and it will simply mush down at about 5 - 600 fpm
with the Johnson airspeed indicator wavering somwhere around 30 - 32 mph.
Just keep the ball centered.
Sharp stall reports might have more to do with leading edge shape than
airfoil shape.
Greg Cardinal
Mineapolis
----- Original Message -----
From: "Don Emch" <EmchAir@aol.com>
Sent: Sunday, February 07, 2010 8:00 PM
Subject: Pietenpol-List: Re: Looking for the Riblett letter..
>
> Mark,
>
> This is the first time I've seen this letter. I'm very certain Mr.
> Riblett is very knowledgeable on his designs, but I have to disagree with
> him on his comments about Mr. Pietenpol's airfoil. My Piet by no means
> has a sharp stall. It is very benign and very predictable. It is also
> very very slow, especially with a touch of power. The most surprising
> part of the letter is "Indeed, due to safety considerations, we strongly
> recommend this substitution." I could see if the Pietenpol had been
> plagued with stall accidents over the past 80 years, but it really hasn't.
> If there had been any complaints about a bad stall characteristic, which
> I've never heard, it was probably due to a rearward cg, which some Piets
> have. Please don't let anyone fool you. A properly built Pietenpol is a
> safe, docile, honest, and FUN airplane!
>
> I was all set to fly this weekend with the skis, but that 6" to 8" of snow
> we were forcasted to get turned into 26"!! Little too deep!
>
> Don Emch
> NX899DE
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=285280#285280
>
>
>
Message 30
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| Subject: | Re: Looking for the Riblett letter.. |
Mark,
I would agreed with Don and Greg about Mr. Riblett's thoughts on the Piet
airfoil....while certainly interesting, they should be viewed with the
understanding that they are purely theoretical. Riblett never built or flew
a Pietenpol with his airfoil to prove his claims. The empirical knowledge
provided by 80 years of Pietenpol airfoils flying around would tend to
indicate that the negative characteristics he outlines are exaggerated to
non-existent. As far as how much of a benefit you will actually see from the
Riblett...I would say you have to look to Lowell for that, as he is the only
one (despite all the talk about the Riblett) to have actually flown a Piet
with the airfoil (that I have heard of, at least).
Don't worry about those of us that have to deal with good ole' winter. We
get to sit here and be glad we're not one of "those poor saps" that live in
California! (Sorry Mark, Gary, Chris, Jim, et al.....couldn't resist)
Have a good night,
Ryan
On Sun, Feb 7, 2010 at 9:51 PM, Mark Roberts <mark.rbrts1@gmail.com> wrote:
> Oh Man! 26" of snow! It's one thing to read about the news and think "those
> poor saps!" It's another to know one of "those poor saps!" I hope you dig
> out soon!
>
> I appreciate your comments about the original Piet airfoil. I know this
> topic has seen quite a bit of discussion over the years (the earliest posts
> I saw were from '98 or '99), and I wasn't trying to kick over the safety
> issue again, although I do appreciate the comments.
>
> My thought was what Riblett said about the contrast of the 2 airfoils. I
> did not remember some of the issues involved. I know for me, at 6'4" and
> "two-hundred-and-none-your-business" fat pounds (Ok, 245 lbs with no clothes
> to cover the natural good looks of my fat), I am building the 613.5 because
> I remember seeing something that said it would have better lifting power in
> hot weather, something we get nothing BUT in the summers in Central
> California.
>
> As I see it, a design that has stood the test of over 80 years is not
> something you make great changes to unless there is a specific need (as in
> making the cockpit fit yer body, and making the wing better for your
> weight). Some would even argue that if that is the issue, find a plane that
> fits better. But after some 20 years of looking, this one meets almost all
> the criteria I need most: build at your own pay-comfort level, reliable,
> LSA, 2 seats and cool looking (well, cool enuf!)
>
> Thanks for the feedback!
>
> Mark
>
> On Sun, Feb 7, 2010 at 6:00 PM, Don Emch <EmchAir@aol.com> wrote:
>
>>
>> Mark,
>>
>> This is the first time I've seen this letter. I'm very certain Mr.
>> Riblett is very knowledgeable on his designs, but I have to disagree with
>> him on his comments about Mr. Pietenpol's airfoil. My Piet by no means has
>> a sharp stall. It is very benign and very predictable. It is also very
>> very slow, especially with a touch of power. The most surprising part of
>> the letter is "Indeed, due to safety considerations, we strongly recommend
>> this substitution." I could see if the Pietenpol had been plagued with
>> stall accidents over the past 80 years, but it really hasn't. If there had
>> been any complaints about a bad stall characteristic, which I've never
>> heard, it was probably due to a rearward cg, which some Piets have. Please
>> don't let anyone fool you. A properly built Pietenpol is a safe, docile,
>> honest, and FUN airplane!
>>
>> I was all set to fly this weekend with the skis, but that 6" to 8" of snow
>> we were forcasted to get turned into 26"!! Little too deep!
>>
>> Don Emch
>> NX899DE
>>
>>
>>
>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=285280#285280
>>
>>
>>
>>
>>
>>
>>
>> ==========
>> st" target="_blank">http://www.matronics.com/Navigator?Pietenpol-List
>> ==========
>> http://forums.matronics.com
>> ==========
>> le, List Admin.
>> ="_blank">http://www.matronics.com/contribution
>> ==========
>>
>>
>>
>>
> *
>
> *
>
>
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