Today's Message Index:
----------------------
1. 05:34 AM - Re: wing spar question (Michael Turrell)
2. 07:36 AM - Re: Wing spar questions (Roman Bukolt)
3. 08:43 AM - Re: Re: wing spar question (Steve Glass)
4. 08:56 AM - flying (Dick Navratil)
5. 09:24 AM - Re: flying (Phillips, Jack)
6. 10:07 AM - Re: flying (Hans Vander Voort)
7. 02:16 PM - Thanks Chuck for a great video (walt evans)
8. 02:35 PM - Re: flying (Rcaprd@aol.com)
9. 02:48 PM - Re: Re: wing spar question (Peter W Johnson)
10. 03:02 PM - Re: flying (Steve Ruse)
11. 03:25 PM - Fw: Loops and rolls (Hans Vander Voort)
12. 08:23 PM - Corvair Crank (Glenn Thomas)
13. 08:56 PM - Mike Cuy's Piet (Ron Franck)
14. 09:45 PM - Re: Mike Cuy's Piet (Sterling)
Message 1
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Subject: | Re: wing spar question |
In a message dated 1/18/2006 7:16:10 PM Central Standard Time, jtextor@thepalmergroup.com
writes:
He did say it was NOT vertical grain.
Spars must be 1/4 sawn, or they warp.
Chuck G.
NX770CG
I have to disagree with you here Chuck and this is based soley on my own
experience with wood.Generally speaking if a board is straight after kiln drying
it will remain straight after sitting for years ,provided it is kept dry.Wood
is usually kiln dried to 6% moisture content and when we get it and sit it
in our shop it will pick up moisture and stabilize with its surrounding usually
around 9 to 12 % moisture content and it will fluctuate between these figures
but it will not suddenly develop stresses that want to warp it of its own accord.You
can introduce a warp if you store it with a twist ,somthing like bending
a cap strip after steaming it and then letting it dry.Different species of
wood are kiln dried at different rates to prevent splits ,checking ,and warping.It's
the rate of drying that is important.All bets are off if you store the
wood where it is directly exposed to water with sun dry cycles in between.The
sun suddenly drying a very wet board will introduce stresses that could either
split,check or warp it,where previously it was a perfectly straight board.
Where 1/4 sawn wood shines is in it's shrinkage and expantion ,which is
very little as compared to flat sawn wood.It is very stable.
Been working with wood for years as a cabinet maker and this has been my
expierience which does not qualify me as a wood expert,just a wood observer,so
if there is a wood expert in the house,let us hear from him.
Kind regards,Mike
Message 2
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Subject: | Re: Wing spar questions |
FYI - Bill Rewey, noted expert on the Pietenpol, who built two of them, built his
wing with 1" solid spars no routing.
his current piet has been flying now for over 11 yrs. on a continental A65. It's
travelled the equivalent of 1 1/4 times around the world. He's given rides
to many people particularly wives of Piet builders, to show them how much fun
they're going to have when finished. He's flown passengers as large as 240lb.
My point is this. don't need to be so fussy about weight saving or rigidity
of wing spars. 1" or 3/4". If built with Spruce or Spuce or Fir it'll be strong.
The whole plane is over-engineered structurally. Ask William Wynne the
"Corvair Authority". He had the opportunity to survive crashing his. But cedar??
They make yellow pencils outa cedar and people break them every day when
they lose their cool.
Message 3
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Subject: | Re: wing spar question |
--> Pietenpol-List message posted by: "Steve Glass" <redsglass@hotmail.com>
Hi Everybody.
I have been lurking on the list and decided to jump in and ask a question
about the spars.
I think the original design is great. I also think it makes sense to use
modern materials such as epoxy where it makes sense. I know there is a
builtup spar that has been designed for the wing.
I have been in the yacht building business for 30 years and know that good
wood is getting more difficult to find and more expensive. When I build
mine I will feel more confident in building the spar with spruce caps and a
ply web. Has anybody gone this route, compared finished weights etc.
Thanks in advance.
Steve G.
Message 4
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There's been some good chat on building lately, but with the winter weather is
anybody getting any flying in? It's too cold around here and I have mine all
torn down changing the axle and re-doing the fuel system. The weather must be
good somewhere.
Dick N.
Message 5
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Unfortunately the weather is good here and mine is down with brake
problems. I also have a crack in the exhaust system that I will need to
repair.
I'm taking tomorrow off to put new brake pads on and hopefully fly it.
Raleigh is supposed to be 65 F tomorrow, with no wind.
Jack Phillips
NX899JP
-----Original Message-----
From: owner-pietenpol-list-server@matronics.com
[mailto:owner-pietenpol-list-server@matronics.com] On Behalf Of Dick
Navratil
Sent: Thursday, January 19, 2006 11:56 AM
Subject: Pietenpol-List: flying
There's been some good chat on building lately, but with the winter
weather is anybody getting any flying in? It's too cold around here and
I have mine all torn down changing the axle and re-doing the fuel
system. The weather must be good somewhere.
Dick N.
Message 6
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--> Pietenpol-List message posted by: Hans Vander Voort <hans.vander.voort@alfalaval.com>
I have, flew even on new years day.
Weather can be windy but when crosswind allows I'll be up.
Temperatures are around 60 - 70 F in the Houston area, cold for most down
here.
Hans
"Phillips, Jack"
<Jack.Phillips@ca
rdinal.com> To
Sent by: <pietenpol-list@matronics.com>
owner-pietenpol-l cc
ist-server@matron
ics.com Subject
RE: Pietenpol-List: flying
01/19/2006 11:23
AM
Please respond to
pietenpol-list@ma
tronics.com
Unfortunately the weather is good here and mine is down with brake
problems. I also have a crack in the exhaust system that I will need to
repair.
Im taking tomorrow off to put new brake pads on and hopefully fly it.
Raleigh is supposed to be 65 F tomorrow, with no wind.
Jack Phillips
NX899JP
-----Original Message-----
From: owner-pietenpol-list-server@matronics.com
[mailto:owner-pietenpol-list-server@matronics.com] On Behalf Of Dick
Navratil
Sent: Thursday, January 19, 2006 11:56 AM
To: pietenpol-list@matronics.com
Subject: Pietenpol-List: flying
There's been some good chat on building lately, but with the winter
weather is anybody getting any flying in? It's too cold around here
and I have mine all torn down changing the axle and re-doing the fuel
system. The weather must be good somewhere.
Dick N.
Message 7
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Subject: | Thanks Chuck for a great video |
Thanks Chuck!
Glad I took everyones advice and got Chuck's video.
Had to install a DVD player in my computer, which took a few days. Kind of jumped
around cause it was late, now I can go back and enjoy it stem to stern.
Can't wait till spring.
Ain't Life Grand!
walt evans
NX140DL
do not archive
Message 8
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In a message dated 1/19/2006 10:57:48 AM Central Standard Time,
horzpool@goldengate.net writes:
There's been some good chat on building lately, but with the winter weather
is anybody getting any flying in? It's too cold around here and I have mine
all torn down changing the axle and re-doing the fuel system. The weather must
be good somewhere.
Dick N
My prop is still on the work table, and I've still got to finish my new seat,
and some other stuff. 59=BA and mild winds today. I've missed some great
flying weather. :(
Chuck G.
NX770CG
Message 9
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Subject: | Re: wing spar question |
--> Pietenpol-List message posted by: "Peter W Johnson" <vk3eka@bigpond.net.au>
Steve,
Check out http://www.cpc-world.com and have a look at "Airframe
Construction" > "Wings" > "Wing Spars".
May give you an idea or two.
Cheers
Peter
Wonthaggi, Australia
http://www.cpc-world.com
-----Original Message-----
From: owner-pietenpol-list-server@matronics.com
[mailto:owner-pietenpol-list-server@matronics.com] On Behalf Of Steve Glass
Sent: Friday, 20 January 2006 3:43 AM
Subject: RE: Pietenpol-List: Re: wing spar question
--> Pietenpol-List message posted by: "Steve Glass" <redsglass@hotmail.com>
Hi Everybody.
I have been lurking on the list and decided to jump in and ask a question
about the spars.
I think the original design is great. I also think it makes sense to use
modern materials such as epoxy where it makes sense. I know there is a
builtup spar that has been designed for the wing.
I have been in the yacht building business for 30 years and know that good
wood is getting more difficult to find and more expensive. When I build
mine I will feel more confident in building the spar with spruce caps and a
ply web. Has anybody gone this route, compared finished weights etc.
Thanks in advance.
Steve G.
--
--
Message 10
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--> Pietenpol-List message posted by: Steve Ruse <steve@wotelectronics.com>
I've been up twice in my GN-1 this January, I'm hoping to go up again this
weekend. I'm going to try to take some video while I'm flying, not sure how
that will work out though.
Steve Ruse
N6383J - O44
Norman, OK
Quoting Dick Navratil <horzpool@goldengate.net>:
> There's been some good chat on building lately, but with the winter
> weather is anybody getting any flying in? It's too cold around here
> and I have mine all torn down changing the axle and re-doing the fuel
> system. The weather must be good somewhere.
> Dick N.
Message 11
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Subject: | Fw: Loops and rolls |
--> Pietenpol-List message posted by: Hans Vander Voort <hans.vander.voort@alfalaval.com>
Anyone up for a Loop ?
----- Forwarded by Hans Vander Voort/GP/US/ALFALAVAL on 01/19/2006 05:23 PM
-----
"Dan Wilson"
<dwilson@ci.austi
n.mn.us> To
<hans.vander.voort@alfalaval.com>
01/19/2006 05:18 cc
PM
Subject
Re: Loops and rolls
Greetings ! Hans
I just got off the phone with Vi Kapler from Rochester, MN. Vi knows more
about the Piet than anyone else I have ever talked to. He worked along
side Bernie for many years. I asked him the question about rolls and
loops. He stated that the Piet should not be rolled under any
circumstances. It is not stressed for this type of acrobatics. He did say
however that the plane can be looped. He has done it. He also said that
the Ford Model A has plenty enough power to loop the Piet. When I asked
about the barrrel roll he simply stated that he would never attempt it.
Please feel free to share this information with the piet family.
Dan
Dan Wilson
Fire Chief
Austin Fire Department
Message 12
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--> Pietenpol-List message posted by: "Glenn Thomas" <glennthomas@charter.net>
I got hooked on the idea of the affordable Corvair motor and bought 2 of them,
the William Wynne conversion manual and a couple of WW's videos and I visit his
website a couple times a week. Then last week, he posted new information regarding
nitrided crankshafts and I'm trying to find out if anyone knows if these
stress fractures and cracks that he's found are ever found in an engine straight
out of a car. I'd like to continue with the Corvair motor but his article
states that the Embry-Riddle magnaflux machine he used to see the cracks revealed
a lot more than the typical automotive magnaflux usually does. ...so my
question is if I send him the best of my 2 to have the safety shaft installed
and grinding, and nitriding, how do I know the shaft I'm sending is free of
cracks, even if I get a clean bill of health from the place that will do my magnaflux
on the 2 of them. This is one of those areas I don't know that much about
and I'm hoping someone else does. If the cracks are something that appear
only as a result of spinning a prop then I'll just have the crank I use nitrided.
Anyone ever heard of a Corvair crankshaft failure (nitrided or otherwise?)
Thanks,
Glenn Thomas
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=5405#5405
Message 13
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--> Pietenpol-List message posted by: Ron Franck <franck@geneseo.net>
For those of you with sharp eyes you may catch a glimpse of Mike Cuy's Piet
at http://www.airventure.org/igottabethere/index.html
Faster connect speeds a plus when loading the video clip.
------------------------------------------------
No Virus Found In This Message
Scanned at barracuda.geneseo.net
Message 14
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Subject: | Re: Mike Cuy's Piet |
--> Pietenpol-List message posted by: "Sterling" <sterling@pgrb.com>
Daing...
It's like "Where's Waldo" but I did see Mike's Piet... Just don't blink.
----- Original Message -----
From: "Ron Franck" <franck@geneseo.net>
Sent: Thursday, January 19, 2006 10:56 PM
Subject: Pietenpol-List: Mike Cuy's Piet
> --> Pietenpol-List message posted by: Ron Franck <franck@geneseo.net>
>
> For those of you with sharp eyes you may catch a glimpse of Mike Cuy's
> Piet at http://www.airventure.org/igottabethere/index.html
> Faster connect speeds a plus when loading the video clip.
>
> ------------------------------------------------
> No Virus Found In This Message
> Scanned at barracuda.geneseo.net
>
>
> http://www.matronics.com/Navigator?Pietenpol-List
>
>
>
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