Brodhead Pietenpol Association

Original Posted By: Robert Ray
=0A=0A =0A=0AJack, =0A-=0Ais that all you plan to do the rest of your life, cash for rides?=0A-=0A-=0AJack nice job on the video an inspiration to all us builders hoping we can =0Ado the same in our own Piets.=0A-=0AThanks for sharing=0A-=0AJohn=0A-=0ASafe in the morning! =0A=0A=0A=0A=0A ________________________________________________________________________________Date: Wed, 9 Sep 2009 01:23:44 -0400Subject: Re: Pietenpol-List: MY PANEL

Original Posted By: "899PM"
This just in from David Paule, a retired Aerospace StrucStress analyst:I am not a member of the Piet forum, but I read it regularly.The reason why all the centerlines meet at the same place is to avoid local bendingmoments. I'll describe.If there were distances between the intersections of say an upright and the adjacentdiagonal, then the cap strip would carry a bending moment equal to the verticalforce from the upright times that distance. The bending moment would betransmitted through the gussets because there's no strength at the end grain.But the upright would carry the moment all by itself at the edge of the gusset,and the orientation of the bending moment would load up the upright in theflatwise direction, its weakest direction.This common intersection of elements, added to the triangular nature of the layout,is the difference between a "truss" and a "frame." Trusses carry only axialforces. Frame elements also carry bending. It's an important distinction, andsince bars are better able to carry axial forces than bending moments, that'swhy light-weight structures are often designed as trusses.Incidentally, that book you referred to is a good one - I've got it. Thanks formentioning it, that's a service to the community, especially the newer folks.David PauleRetired aerospace stress analyst--------Tom KreinerRead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: MY PANEL

Original Posted By: Matt Redmond
Subject: Re: Pietenpol-List: MY PANEL

Original Posted By: "gcardinal"
Wow! That is beautiful work. Yes, where did you get that nifty indicator?--------Mark - working on wingsRead this topic online here:http://forums.matronics.com/viewtopic.p ... __________

Original Posted By: Oscar Zuniga
I initially left the inside plywood off and had to add it later.- Its been a few years and I don't remember exactly why...- That piece does tie the upper motor mounts to the front cabane mount, and this area does get a lot of holes drilled through the longerons so the extra reinforcement is a good idea.- I put the ash piece where the plans call for it, because I was going to use a Corvair and it was necessary for the Pietenpol Corvair motor mount.- Now it just reinforces the firewall.- All of the various braces should stand tall like the longerons so they can be gusseted on both sidesBen CharvetRobert Ray wrote:> Yes I was thinking the same think? any one know since I> have located a zero time a-65 with new pistons for 5,000> minus the mags and carb.> > On Tue, Sep 8, 2009 at 6:45 PM, Michael Perez > wrote:> >- ---I have a few questions for building the short fuselage to use a>- ---Continental engine.>- - - - - Are the large plywood "sides" needed on the inside up front by the>- ---top engine mount brackets if the "model A shelf" will not be>- ---built? Can I use normal size gussets for those top engine mount>- ---brackets and some wedges?>- - - - - The plans for the model A show the large ash cross member up front>- ---connecting the sides at about 4.5" down from the top. Is this>- ---heavy ash member still needed for a Continental and if so, can it>- ---be moved up closer to the top, nearer the top engine mount>- ---brackets?- Or can a spruce piece be used up at the top same as>- ---what is shown for the bottom?- (The bottom piece is 3/4" X 3/4">- ---spruce...seems a little small.)>- - - - - Lastly, for now,- most of the various braces are 1/2" X 1". Do I>- ---stand these pieces up so they are 1" tall like the longerons, or>- ---lay them flat- so they are 1/2" tall?>- - - - - Thanks is advance.> >- ---*> >- ---" target="_blank">http://www.matronics.com/Navigator?Pietenpol-List>- ---ttp://forums.matronics.com>- ---_blank">http://www.matronics.com/contribution> >- ---*> > > *> > > *le, List Admin.________________________________________________________________________________

Original Posted By: owner-pietenpol-list-server(at)matronics.com
Beautiful!!Gary BootheCool, Ca.PietenpolWW Corvair Conversion, mountedTail done, Fuselage on gear(15 ribs down.)-----Original Message-----

Original Posted By: Owen Davies

Original Posted By: Michael Perez
Oscar,You made a few good points. When I was getting my biplane piet project, I wantedto build it in the EAA hangar's near me, as they have lots of room and toolsand so forth, and they discouraged me... and were right.I have been working in my house, and the most productive work has been in my livingroom, dragging the wings in and having them in front of the TV sort of forcesyou to notice and lets you hang out with your family while still workingon your project and enjoying it. If I could, I would have a large open house thatwas a mix of shop and house, and would draw my family in to building things,repairing things and enjoying accomplishing something with their hands.My garage was totally full before I took on an airplane, so now my basement iscramped, the garage is, and the overflow is in a shed I had to get and build.Like everyone else I would love to have a big spacious place to build, but thefarther it is from your living room, the tougher it is to get their.I will try to update my project pics soon, have my lower wings done now, and aboutready to start on the top wings. (Did bottom first because it can fly withonly the top, and that would make it much less likely I would ever have finishedthe bottom ones, and the bottom ones needed more work.)JimRead this topic online here:http://forums.matronics.com/viewtopic.p ... ______Date: Wed, 9 Sep 2009 06:51:19 -0700 (PDT)

Original Posted By: speedbrake(at)sbcglobal.net
Mike=2CYou could use a good urethane. System Three marine comes to mind. But=2C once painted it would be very difficult if not impossible to inspect the condition of the wood.Doug DeverIn beautiful Stow OhioDate: Wed=2C 9 Sep 2009 06:51:19 -0700

Original Posted By: Ben Charvet

Original Posted By: Ryan Mueller
Subject: Re: Pietenpol-List: Paint in place of varnish

Original Posted By: Ben Charvet

Original Posted By: Jim Markle
The inclinometer is a reproduction from a 1919 Carl Ort catalog if I remember correctly.It came with my Sky Scout project. It is fairly complex and someonehad a lot of time into building it. I have the artwork for the face. The faceis aluminum, the body is a wooden assembly and the glass tubes are hand blown/bentby presumably a neon signmaker. The vertical tube has a rubber plug thruwhich I injected alcohol colored with red dye. It is very fussy to get just theright amount in to make it accurate and repeatable. Properly set up it is accurate(sofar).--------PAPA MIKERead this topic online here:http://forums.matronics.com/viewtopic.p ... ______Date: Wed, 9 Sep 2009 15:48:55 -0400 (GMT-04:00)

Original Posted By: Jim
another pic--------PAPA MIKERead this topic online here:http://forums.matronics.com/viewtopic.p ... ttachments: http://forums.matronics.com//files/img_ ... ______Date: Wed, 9 Sep 2009 20:57:38 +0000 (GMT)

Original Posted By: "Barry Davis"
Your inclinometer looks similar in principal to the one used in the Spirit of St. Louis. Very well done.http://www.riekerinc.com/M-Inclinometer ... t.htmWayne Bressler Jr.Taildraggers, Inc.taildraggersinc.com________________________________________________________________________________

Original Posted By: "Bill Church"
Jim,I was wondering if anyone would notice those pennies.--------PAPA MIKERead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: RE: Pietenpol-List: Paint in place of varnishDate: Wed, 9 Sep 2009 18:08:12 -0400

Original Posted By: owner-pietenpol-list-server(at)matronics.com
Mike,Certainly, I noticed them, too. I didn't want to draw any attention to them,'cause that's why I carry a pocket knife....Can't wait to see pics of the rest of your plane!Gary BootheCool, Ca.PietenpolWW Corvair Conversion, mountedTail done, Fuselage on gear(15 ribs down.)-----Original Message-----

Original Posted By: Ryan Mueller
Plus you are adding unnecessary weight. The pigmented coating weighs much morethan the clear varnish. Rick Schreiber----- Original Message -----

Original Posted By: Michael Perez
Here is another cool idea I saw on Dennis Hall's Sky Scout at Brodhead. He stained the visible interior cockpit wood with a really light colored stain to give it an "old" sun-yellowed varnish look. This was on birtch plywood. I thought it was neat and wished I had done it prior to varnishing.-Dan HelsperPoplar Grove, IL.-----Original Message-----

Original Posted By: Robert Ray
Subject: Re: Pietenpol-List: Paint in place of varnish

Original Posted By: Robert Ray
Subject: Re: Pietenpol-List: Paint in place of varnish

Original Posted By: Matt Redmond
Subject: Re: Pietenpol-List: Paint in place of varnish

Original Posted By: Michael Perez
All the Brits seem to paint theirs.There would be moreUV protection. Of course that shouldn't be an issueunder the fabric. :-)I agree that staining and discolouration will be morevisible under varnish.I'd better believe in varnish. It's too late now! :-)Clif Plus you are adding unnecessary weight. The pigmented coating weighs much more than the clear varnish. Rick Schreiber I would second Doug and Ben's comments. The transparency of a varnished finish makes inspection possible. ________________________________________________________________________________Date: Thu, 10 Sep 2009 05:39:10 -0700 (PDT)

Original Posted By: Michael Perez
Yes, I always thought the varnish was the coating of choicesimply because it has a lower viscosity and would soak intothe wood more readily than paint, thus protecting the woodbetter (especially in areas that we may never get to inspectagain once the covering goes on). There is great appealin seeing that rich wood tone and grain and the varnishmakes it even richer and nicer, but there is also someappeal to painting, as the Brit builders seem to preferwhen going for a semi-military look. I thought aboutpainting the inside of the cockpits of 41CC for that look,but just couldn't bring myself to do away with the naturalwood.I noticed those Indian head coins in that panel too. I'msurprised nobody said to keep Jim away from it but we allagreed to quit picking on him so we are doing very good onthat account.Oscar ZunigaAir Camper NX41CCSan Antonio, TXmailto: taildrags(at)hotmail.comwebsite at http://www.flysquirrel.net________________________________________________________________________________Date: Thu, 10 Sep 2009 05:49:26 -0700 (PDT)

Original Posted By: Ryan Mueller
Subject: Re: Pietenpol-List: Paint in place of varnish

Original Posted By: shad bell

Original Posted By: Michael Perez
Hey Shad, Thanks for the congrats. I just signed up for Matronics. Looking at all theposts, I should have signed up before completing the Pietenpol. I'm going tobe at the MAAC fly-in to visit some friends this weekend. Summer is runningshort pretty quick. I hope things are going well. I thank you and your dad forthe time, patients, and hospitality you offered. Happy flying and hope to seeyou guys at a fly-in someday soon.Kurt --------KSRead this topic online here:http://forums.matronics.com/viewtopic.p ... ______Date: Thu, 10 Sep 2009 08:29:41 -0700 (PDT)

Original Posted By: Ryan Mueller
Subject: Re: Pietenpol-List: Re: New Philly Piet fly-in on sunday?

Original Posted By: helspersew(at)aol.com

Original Posted By: Michael Perez