Today's Message Index:
----------------------
1. 08:01 AM - Autogas vs.Avgas (Oscar Zuniga)
2. 08:51 AM - Re: Plywood ()
3. 09:41 AM - Riblett's Info (Pieti Lowell)
4. 10:45 AM - Riblett's grafts (Pieti Lowell)
5. 01:21 PM - Re: Autogas vs.Avgas (Gene & Tammy)
6. 03:48 PM - Re: Plywood (Tim Willis)
7. 04:42 PM - Re: Riblett's Info (Tim Willis)
8. 07:38 PM - Re: Riblett's Info (Pieti Lowell)
9. 08:17 PM - Re: Riblett's Info (jeremy bramall)
10. 08:53 PM - Delaware, Ohio Fly-In (shad bell)
Message 1
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| Subject: | Autogas vs.Avgas |
>Of course, all Pietenpol owners drain their fuel system for the winter.
What is "winter"? Down here, we fly our airplanes year 'round ;o)
PS, I fly avgas in 41CC exclusively. It's an airplane, not a car ;o)
Oscar Zuniga
Air Camper NX41CC
San Antonio, TX
mailto: taildrags@hotmail.com
website at http://www.flysquirrel.net
Message 2
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It's what I used on my ribs. Lately I have found a lower quality plywood
being sold in my local hobby shop so be careful. I boiled and soaked the
good stuff in water just to check it first and it was just fine.
Chris Tracy
Sacramento, Ca
Website at http://www.WestCoastPiet.com
----- Original Message -----
From: "mr-fix-all" <jb.spiegel@us.schneider-electric.com>
Sent: Friday, August 08, 2008 11:34 AM
Subject: Pietenpol-List: Plywood
> <jb.spiegel@us.schneider-electric.com>
>
> Question, is the 1/16 90 deg birch plywood that aircraft spruce the same
> 1/16 90 deg birch plywood that hobby stores sell.
>
> I received my riblett plans from Roman today and I need to order plywood.
>
> --------
> "Be who you are and say what you think, those that mind don't matter,
> and those that matter don't mind" Dr. Seuss
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=197373#197373
>
>
>
Message 3
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Riblett's letter to Pieti Lowell, ref air foils for a Pietenpol
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=197525#197525
Attachments:
http://forums.matronics.com//files/riblett_p2_118.jpg
http://forums.matronics.com//files/riblett_p1_976.jpg
Message 4
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| Subject: | Riblett's grafts |
The lift,stall and cruise of the Piet, 4412 & 612 airfoils are very interesting
to those that need more lift.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=197529#197529
Attachments:
http://forums.matronics.com//files/riblett_p3_653.jpg
Message 5
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| Subject: | Re: Autogas vs.Avgas |
Oscar, not getting to fly your Piet in the winter is like a pilot never
getting to watch "Waldo Pepper". They just don't know what their missing.
Gene
N502R (an all season bird).
>
> What is "winter"? Down here, we fly our airplanes year 'round ;o)
>
>>
> Oscar Zuniga
> Air Camper NX41CC
> San Antonio, TX
> mailto: taildrags@hotmail.com
> website at http://www.flysquirrel.net
>
>
> --
> Checked by AVG.
> 5:54 AM
>
>
Message 6
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The plywood of this sort here near Austin, TX, in both the Hobby Lobby (for sure)
and Michael's (as I recall, not so sure) says it is for hobby use only, and
not for aircraft use.
Go to Boulter plywood in greater Boston. They have a website. A 4X8 foot sheet
is $23 plus freight, on a special. and they will cut it into either 4X4 feet
or 2X8 feet. UPS may charge some special rates for either, but they will tell
you. This is good marine plywood, and very suitable for airplane use.
You may want quite a bit, for not only rib gussets, but for wing leading edges.
Add it up and see what you think.
Tim in central TX
-----Original Message-----
>From: catdesigns@att.net
>Sent: Aug 9, 2008 10:51 AM
>To: pietenpol-list@matronics.com
>Subject: Re: Pietenpol-List: Plywood
>
>
>It's what I used on my ribs. Lately I have found a lower quality plywood
>being sold in my local hobby shop so be careful. I boiled and soaked the
>good stuff in water just to check it first and it was just fine.
>
>Chris Tracy
>Sacramento, Ca
>Website at http://www.WestCoastPiet.com
>
>
>----- Original Message -----
>From: "mr-fix-all" <jb.spiegel@us.schneider-electric.com>
>To: <pietenpol-list@matronics.com>
>Sent: Friday, August 08, 2008 11:34 AM
>Subject: Pietenpol-List: Plywood
>
>
>> <jb.spiegel@us.schneider-electric.com>
>>
>> Question, is the 1/16 90 deg birch plywood that aircraft spruce the same
>> 1/16 90 deg birch plywood that hobby stores sell.
>>
>> I received my riblett plans from Roman today and I need to order plywood.
>>
>> --------
>> "Be who you are and say what you think, those that mind don't matter,
>> and those that matter don't mind" Dr. Seuss
>>
>>
>>
>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=197373#197373
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>
>
Message 7
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| Subject: | Re: Riblett's Info |
Lowell,
Thanks for posting this. Some may not know of your experience with various airfoils.
Of course, you are one of the few (maybe the only one) who has changed
wings on the same plane with the same engine,and changed engines with the same
wing and plane, and then changed both. You can report empirical data on the
effect of each of the changes.
I think, based on talking with you about this earlier this year, and our more recent
discussions at Brodhead, many builders should use either a Riblett GA30U-612
or a GA30U-613.5 instead of BP's airfoil. I believe you agree with that
evaluation as a good decision for all but Piet purists. (Room for all instide
the tent.) And we have discussed the merits of both these Riblett airfoils.
I'd like to lay out some impressions of the 613.5, and see if you will confirm
or change this post, for the benefit of others considering these choices. I'll
ask you to pardon me in advance,if I am misinterpreting any of our discussions,
or if I have crossed them up with similar discussions with Bill Rewey or Roman
Bukolt.
As you know, and as we have discussed, the 613.5 is "fatter" than the other airfoils.
You and I have discussed its comparative merits.
For the benefit of others on the board, the 613.5 has more loft on the Y-axis and
a bigger radius, resulting in more camber. Otherwise it looks much like the
NACA 2412 or 4412 and the Riblett 612, all of them peaking "Y" at 30 percent
of the "X" (chord). All of these have better laminarity than BP's airfoil in
the early part of the airfoil, before the airflow "goes turbulent." (All are
characterized as "turbulent airfoils," but some are more turbulent than others.)
The Riblett GA30U-613.5 seems to me a better choice for a Piet with less powerful
engines, such as most Model A's (not your fuel-injected baby) or Continental
A-65s. I think you have agreed with this opinion, perhaps even postulated it
yourself.
The 613.5 would give the Piet builder a faster climb, better safe payload on hot
days, etc. A wing built with it would weigh a little more than one using a
612 airfoil-- how much more depending upon whether the builder uses filler blocks
at the top of each spar or a full-height built-up ply and wood spar.
Alternatively, the 612 might be better for higher hp Piets. With 100 hp or more
the pilot gets a faster climb in any event, and the 612 would have less drag
and allow a faster cruising speed than the 613.5. And as you and Mr. Riblett
have reported, there are no negatives associated with the 612 when compared to
BP's original "FC-10" airfoil. (We may not know that much about the pitching
moment of the 613.5 as yet.)
Do you agree with this discussion of the 613.5 vs. the 612? And with a 612 foir
higher hp Piets? Is this the right way//a right way to think of the choices?
Tim in central TX
-----Original Message-----
>From: Pieti Lowell <Lowellcfrank@yahoo.com>
>Sent: Aug 9, 2008 11:38 AM
>To: pietenpol-list@matronics.com
>Subject: Pietenpol-List: Riblett's Info
>
>
>Riblett's letter to Pieti Lowell, ref air foils for a Pietenpol
>
>
>Read this topic online here:
>
>http://forums.matronics.com/viewtopic.php?p=197525#197525
>
>
>Attachments:
>
>http://forums.matronics.com//files/riblett_p2_118.jpg
>http://forums.matronics.com//files/riblett_p1_976.jpg
>
>
Message 8
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| Subject: | Re: Riblett's Info |
Tim , as per usual, you are on track, Riblitt's better design even over the 612
is the 613.5, As you know it is easy to see the difference . But you can also
carry a larger fuel tank in the 613.5.
Lowell
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=197633#197633
Message 9
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| Subject: | Re: Riblett's Info |
Alright, so if you had 90hp, not heavy or light, and wanted better stol characteristics,
which would you choose?
Jeremy in Dallas
Tim Willis <timothywillis@earthlink.net> wrote:
Lowell,
Thanks for posting this. Some may not know of your experience with various airfoils.
Of course, you are one of the few (maybe the only one) who has changed wings
on the same plane with the same engine,and changed engines with the same
wing and plane, and then changed both. You can report empirical data on the effect
of each of the changes.
I think, based on talking with you about this earlier this year, and our more recent
discussions at Brodhead, many builders should use either a Riblett GA30U-612
or a GA30U-613.5 instead of BP's airfoil. I believe you agree with that evaluation
as a good decision for all but Piet purists. (Room for all instide the
tent.) And we have discussed the merits of both these Riblett airfoils.
I'd like to lay out some impressions of the 613.5, and see if you will confirm
or change this post, for the benefit of others considering these choices. I'll
ask you to pardon me in advance,if I am misinterpreting any of our discussions,
or if I have crossed them up with similar discussions with Bill Rewey or Roman
Bukolt.
As you know, and as we have discussed, the 613.5 is "fatter" than the other airfoils.
You and I have discussed its comparative merits.
For the benefit of others on the board, the 613.5 has more loft on the Y-axis and
a bigger radius, resulting in more camber. Otherwise it looks much like the
NACA 2412 or 4412 and the Riblett 612, all of them peaking "Y" at 30 percent
of the "X" (chord). All of these have better laminarity than BP's airfoil in the
early part of the airfoil, before the airflow "goes turbulent." (All are characterized
as "turbulent airfoils," but some are more turbulent than others.)
The Riblett GA30U-613.5 seems to me a better choice for a Piet with less powerful
engines, such as most Model A's (not your fuel-injected baby) or Continental
A-65s. I think you have agreed with this opinion, perhaps even postulated it
yourself.
The 613.5 would give the Piet builder a faster climb, better safe payload on hot
days, etc. A wing built with it would weigh a little more than one using a 612
airfoil-- how much more depending upon whether the builder uses filler blocks
at the top of each spar or a full-height built-up ply and wood spar.
Alternatively, the 612 might be better for higher hp Piets. With 100 hp or more
the pilot gets a faster climb in any event, and the 612 would have less drag
and allow a faster cruising speed than the 613.5. And as you and Mr. Riblett have
reported, there are no negatives associated with the 612 when compared to
BP's original "FC-10" airfoil. (We may not know that much about the pitching moment
of the 613.5 as yet.)
Do you agree with this discussion of the 613.5 vs. the 612? And with a 612 foir
higher hp Piets? Is this the right way//a right way to think of the choices?
Tim in central TX
-----Original Message-----
>From: Pieti Lowell
>Sent: Aug 9, 2008 11:38 AM
>To: pietenpol-list@matronics.com
>Subject: Pietenpol-List: Riblett's Info
>
>
>Riblett's letter to Pieti Lowell, ref air foils for a Pietenpol
>
>
>Read this topic online here:
>
>http://forums.matronics.com/viewtopic.php?p=197525#197525
>
>
>Attachments:
>
>http://forums.matronics.com//files/riblett_p2_118.jpg
>http://forums.matronics.com//files/riblett_p1_976.jpg
>
>
Message 10
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| Subject: | Delaware, Ohio Fly-In |
Hello Ohio Area-Pieters,- Just wondering if any Ohio Piets planned on a
ttending the Delaware, Ohio fly-in on Aug 16, 17.- If any one plans on go
ing send me an e-mail, and they can stop by Chapman Field in Centerburg Ohi
o for free donuts and coffee before we fly over to Delaware, ( before 9AM).
- Skipp G., Mike C., And Don Emch, let me know if you want to go I will w
ait for you and we can make a group arrival on Saturday Morning.- Dad say
s they are wanting fly-bys, so if you want to we can do some in-trail, or l
oose formation fly-bys low, and slow.
-
Shad=0A=0A=0A
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