Pietenpol-List: so i have been using poplar

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Pietenpol-List: so i have been using poplar

Post by matronics »

Original Posted By: "Kyle85"
Subject: Pietenpol-List: Sheet metal for cowlings and combings.Gents, I had a small incident with my Stinson yesterday when a wind gust blew thepassenger door open and against the boot cowl causing a small hole. I decidedto order a full sheet of material so that after fabricating the patch I willhave sufficient mterial remaining for the cowlings of my piet. What material are most using for cowlings? 2024, 6061 or 7075? 032 or 040? Thanks!Scott KnowltonBurlington Ontario ________________________________________________________________________________Subject: Pietenpol-List: so i have been using poplar
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Post by matronics »

Original Posted By: Marvin Haught
I am sweating pretty good right now. A co-worker of mine who is an IA told me thatWithout increasing the dimensions of my lumber(poplar) that there is no way thatmy airplane will pass an airworthiness inspection. My grain runout is one inthirty or betterAnd eight rings per inch. I have tested a piece from every board for density andfailure modulus. There really isn't any nearby eaa chapters around me, so maybeYou guys could shed some light on this. ThanksKyleRead this topic online here:http://forums.matronics.com/viewtopic.p ... ______Date: Mon, 17 Oct 2011 11:34:28 -0500
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Re: Pietenpol-List: so i have been using poplar

Post by matronics »

Original Posted By: Marvin Haught
I hate to stick my neck out here, but here goes. You are building an experimental aircraft. You can build it outta concrete or balsa wood if you want to. One won't fly and the other would probably kill you. However, you can do it if you want to. Poplar is somewhere in between. The DAR shouldn't have a problem with your airplane. I've built four planes and the DAR just was interested in the paper work. I used spruce. "Bat Cave" Dave-----Original Message-----
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> Pietenpol-List: so i have been using poplar

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Original Posted By: Jim Markle
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Re: Pietenpol-List: so i have been using poplar

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Original Posted By: Jim Markle
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Pietenpol-List: Re: so i have been using poplar

Post by matronics »

Original Posted By: Marvin Haught
I'm an IA and i'm using poplar...there is no "airworthy" inspecton...thats why you fly a test period to prove itwill workyou're using an approved wood species ...and it's an experimental planeremember in the F&G manual Mr Pietenpol says the ship could be lighter throughoutand he built on the side of ruggedness an IA is not the FAA or a DAR...i've met a few that had their own ideas of right and wrongmany of the A&P friends i have look at the piet after working on corporate jetsand think i'm crazy...jeffRead this topic online here:http://forums.matronics.com/viewtopic.p ... ______Date: Mon, 17 Oct 2011 15:07:14 -0500
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RE: Pietenpol-List: Re: so i have been using poplar

Post by matronics »

Original Posted By: owner-pietenpol-list-server(at)matronics.com
Marvin,You are partially right. Yes, you do apply for an Airworthiness Cert, but,after the inspection, you get a Special Airworthiness Cert., when it movesinto Phase I testing, which may have been what Jeff was implying. Gary from Cool-----Original Message-----
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RE: Pietenpol-List: Sheet metal for cowlings and combings.

Post by matronics »

Original Posted By: owner-pietenpol-list-server(at)matronics.com
Scott,My cowling is 6061 .025, only 'cuz that's what I had. If I had to buy some,it would probably be 2024 .025.Gary from Cool-----Original Message-----
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RE: Pietenpol-List: so i have been using poplar

Post by matronics »

Original Posted By: owner-pietenpol-list-server(at)matronics.com
Kyle,One other clarification...If you were repairing a certified A/C and wantedto substitute Poplar; Yes, you may very well have to increase dimension. Isit possible that your IA is submersed in certified A/C? and not thinkingexperimental? I suspect so...Gary from Cool-----Original Message-----
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Re: Pietenpol-List: Sheet metal for cowlings and combings.

Post by matronics »

Original Posted By: Gene Rambo
Subject: Re: Pietenpol-List: Sheet metal for cowlings and combings.I used .032" 3003 for the nose cowl. The way I did it, there were small bump-outsto avoid contact with the engine mount bolt heads, louvers under the engine,and also some very small compound bends around the nose piece. 3003 is softenough for those things. 2024 .025 was used for the combing to take the passengerabuse. Dan Helsper Puryear, TN Gents, I had a small incident with my Stinson yesterday when a wind gust blew the passenger door open and against the boot cowl causing a small hole. I decided to order a full sheet of material so that after fabricating the patch Iwill have sufficient mterial remaining for the cowlings of my piet. What material are most using for cowlings?  2024, 6061 or 7075?  032or 040?   Thanks!Scott KnowltonBurlington Ontario ==========-List Email Forum -enpol-List" target=_blank>http://www.matronics.com/Navigator?Piet ... =========p;   - MATRONICS WEB FORUMS -_blank>http://forums.matronics.com==========p; - List Contribution Web Site -p;                 -Matt Dralle, List Admin.target=_blank>http://www.matronics.com/contribution== ... __________
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Re: Pietenpol-List: Re: so i have been using poplar

Post by matronics »

Original Posted By: helspersew(at)aol.com
Group, my wire wheels have a 1 5/8=94 opening and have been fitted with 1 =BD=94ID bronze bushings. Will this setup alone work with the 1 =BD=94 axle? I wouldrather utilize some type of a roller bearing but have not found any withsuch a small wall thickness. It seems to me with just bushings the frictioncould be a problem.Thanks,JackDSM________________________________________________________________________________Subject: Re: Pietenpol-List: Re: so i have been using poplar
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Post by matronics »

Original Posted By: Marvin Haught
Marvin,The DAR came to look at my plane to issue a temporary airworthiness certificate, but was really only concerned about completing the government paperwork, and to see if I had everything labeled properly. For me, he was more of a nuisance than a help. I asked him twice to not lean on my combing, but he proceeded to bend it anyway. During your build it might be helpful for some knowledgeable friends to advise you along the way. The DAR doesn't have the authority to tell you that your airplane is "unsafe".Dan HelsperPuryear, TN-----Original Message-----
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Re: Pietenpol-List: Sheet metal for cowlings and combings.

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Original Posted By: helspersew(at)aol.com
Subject: Re: Pietenpol-List: Sheet metal for cowlings and combings.Thanks to everyone for their inputs. I suppose my biggest challenge will be stowingthe coil of material safely in my shop for the next year or two until Ineed it! Scott -----Original Message-----
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RE: Pietenpol-List: Wire Wheel Bearings

Post by matronics »

Original Posted By: jack(at)textors.com
no problem at all with bronze bushings. Many=2C many aircraft have them. Roller bearings without a heat treated axle can wear into the axle. do not archive
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Pietenpol-List: Re: so i have been using poplar

Post by matronics »

Original Posted By: "bender"
Hi Dave,Welcome, and good for you to take over your Dad's project. But you know, you really need to get those wheels back from your brother Tim. If memory serves, those spoked wheels that are spinning on his Pober were originally intended for, and part of your project :O)Dan HelsperPuryear, TN________________________________________________________________________________Subject: Pietenpol-List: Re: so i have been using poplar
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Pietenpol-List: Re: Wire Wheel Bearings

Post by matronics »

Original Posted By: "tools"
i've been called crazy more than a few times...so maybe it's truei was trying to say that its not up to a DAR or the FAA to determine that yourairplane is airworthy...just that you followed the rules..like Dan said.... "more of a nuisance than a help"jeffRead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Wire Wheel Bearings
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Re: Pietenpol-List: Re: so i have been using poplar

Post by matronics »

Original Posted By: gboothe5(at)comcast.net
Thank you all for the input! I have been doing some reading and have decided tocontinue to use the poplar(purchased from a local sawmill) for cross members,ribs, and tail. From here I am going to try and decide between Spruce, WesternHemlock, or Douglas Fir for the spars and longerons (all in accordance withAC43.13). I would be using spruce without question if only it was locally available.Upstate NY has a lot of quality lumber available locally, just not a lotof spruce.Read this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Re: Pietenpol-List: Re: so i have been using poplar
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Post by matronics »

Original Posted By: Kyle85
Kyle,You'll be fine! My entire Piet is Poplar, with the exception of the tail, whichis Hemlock, and the spars are fir...so I guess my entire Piet is NOT Poplar...thenthere's the Hickory struts & prop...Gary from Cool------Original Message------
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Pietenpol-List: Re: so i have been using poplar

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Original Posted By: johnwoods(at)westnet.com.au
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Re: Pietenpol-List: Re: Bending 5052 Fuel Tank

Post by matronics »

Original Posted By: CozyGirrrl(at)aol.com
Subject: Re: Pietenpol-List: Re: Bending 5052 Fuel TankMore a slide rule type thingie, I have used one since 1980 something, cannot live without it if you are a designer._http://www.alvinco.com/Shop/Products.aspx?IID 326_ (http://www.alvinco.com/Shop/Products.aspx?IID 326) Alvin Screw Data Selector #7355Front side:-detailed data on fasteners from 0-80 to 1-12 threads-spring pins-drilled hole tolerances-min surface finishes for various feature tolerances-shoulder screw data-aluminum rivet data-inch scaleBack side:-sheet metal and wire sizes/wt-fractional to dec equivalents-drill sizes in dec inches-miniature screw data-wrench clearance data-pipe threads-min bend radii-slide rule-mm scaleI also have a larger competitors model, it is huge, it is a nuisance, does not give as much information, not as easy to read. It does have metric stuff so I do not toss it.Chrissi & Randi_www.CozyGirrrl.com_ (http://www.cozygirrrl.com/) CG Products, Custom Aircraft HardwareChairwomen, Sun-N-Fun Engine WorkshopIn a message dated 10/20/2011 7:01:37 P.M. Central Daylight Time, ashcan(at)earthlink.net writes:--> Pietenpol-List message posted by: Jim Ash So my .040" wasn't too far off, and towards the conservative.What's this whiz wheel thingy? I sense the need for a new toy. One can never have enough tools.Jimknumbnuts flunkie/ex-co-Chairman of years-past, Sun-N-Fun Metal Shaping Workshop (with the cool hats)-----Original Message-----
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Pietenpol-List: Re: so i have been using poplar

Post by matronics »

Original Posted By: "Kyle85"
Skip,You hit the mark well on your comments. As I understand it, I do have a Cub A65mount and I was pretty sure I would have to lengthen it out for W&B. I am aboutto embark on some gas welding training at the Columbus, OH Sport Air workshop.If I will ever have the confidence to weld up an engine mount will be amatter of time and practice. If anyone knows of a source for longer mounts,please chime in.I also plan on making the Pietenpol wing attachment. In fact, I just ordered aset of new Pietenpol plans yesterday. I have some Pietenpol plans that camewith the project, but there are pretty beat up and several pages are missing hugechuncks.The excess ply aft of the cockpit should be a thing of the past very soon. Asbeautiful as it looks, it is just begging me to hog a lot out.I would like to come out and visit some time. I am driving down to Barnwell, SCnext month in hopes of seeing a few Piets there over Veterens Day weekend. Hales Landing could be considered on the way. I will send you an e-mail.Thanks!--------David Gallagher601 XL: flying, 200+ hours nowNext project: Pietenpol/GN-1Read this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: so i have been using poplar
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Pietenpol-List: Re: Another museum Piet

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Original Posted By: "Don Emch"
Dave,I live in carthage, up towards watertown. I believe you are down by rochester?I have Been down that way to look at a pietenpol a few times. The guy's name is everettdowneyOr frenchie is what his buisness card says. KyleRead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Another museum Piet
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Post by matronics »

Original Posted By: "Douwe Blumberg"
I think what surprised me the most was just the one hole drilled at the top andat the bottom of the wood cabanes with very little edge distance from the holeto the end. Then it appeared there was some breakout of the wood on the endsfrom drilling the holes. The roll wires and cabanes handle an awful lot ofstress in that area. Must be fine though. Just don't see too many wood, non-reinforcedwing struts out there.Don EmchNX899DERead this topic online here:http://forums.matronics.com/viewtopic.p ... __________
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Pietenpol-List: Re: so i have been using poplar

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Original Posted By: "Kyle85"
OK, that's a whole different matter! But if it was a flyingmachine for any length of time..............Like they say in racing. Copy what works.Clifvery little edge distance from the hole to the end. Then it appeared there was some breakout of the wood on the ends from drilling the holes. >> Don Emch> NX899DE>>> Read this topic online here:>> http://forums.matronics.com/viewtopic.p ... 642#355642>>> -----> No virus found in this message.> Checked by AVG - www.avg.com> ________________________________________________________________________________Subject: Pietenpol-List: Re: so i have been using poplar
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Post by matronics »

Original Posted By: "Gboothe5"
gboothe5(at)comcast.net wrote:> Kyle,> > You'll be fine! My entire Piet is Poplar, with the exception of the tail, whichis Hemlock, and the spars are fir...so I guess my entire Piet is NOT Poplar...thenthere's the Hickory struts & prop...> > Gary from Cool> ---Gary, I am curious about hemlock. AC 4313 calls out specifically Western Hemlock. I calledthe lumber mill and they said all they had was Eastern Hemlcok, which makessense because I live on the east coast. Since you have worked with this inthe past, is there any real difference between the two?KyleRead this topic online here:http://forums.matronics.com/viewtopic.p ... __________
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RE: Pietenpol-List: Re: so i have been using poplar

Post by matronics »

Original Posted By: owner-pietenpol-list-server(at)matronics.com
Sorry, Kyle. I live on the west coast! I can't advise you to ignore AC43.13,but...there was a time when airplanes got built without that...Gary-----Original Message-----
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Pietenpol-List: Re: so i have been using poplar

Post by matronics »

Original Posted By: "coxwelljon"
Kyle85 wrote:> Thank you all for the input! I have been doing some reading and have decidedto continue to use the poplar(purchased from a local sawmill) for cross members,ribs, and tail. From here I am going to try and decide between Spruce, WesternHemlock, or Douglas Fir for the spars and longerons (all in accordance withAC43.13). I would be using spruce without question if only it was locally available.Upstate NY has a lot of quality lumber available locally, just not alot of spruce.Kyle,I don't live too far from you. Remsen NY just north of Utica. Building a GN-1.Look up Condon Lumber http://www.condonlumber.net/lumber.htm. They are located in White Plains NY and carry Sitka Spruce. I have a friend that bought rough boards there and milled his own. He was quite happy. I have not bought from them as the wood work on my plane was done when I bought it. I do get their email promotions, however.--------Jon Coxwell GN-1 BuilderRecycle and preserve the planetRead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: so i have been using poplar
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RE: Pietenpol-List: Re: so i have been using poplar

Post by matronics »

Original Posted By: Gboothe5 [mailto:gboothe5(at)comcast.net]
Kyle,I just received this today, from fellow builder and all-around smart guy,Clif Dawson: http://www.woodbin.com/ref/wood/ Take a look at Eastern Hemlock and Western Hemlock...the differences say itall.Happy building,Gary from Cool-----Original Message-----
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Pietenpol-List: Re: so i have been using poplar

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Original Posted By: Peter Hays
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Pietenpol-List: Re: Lycoming O-235 to purchase

Post by matronics »

Original Posted By: "skellytown flyer"
Gary,Thanks for the link. I guess there really is no question these woods are dramaticallydifferent. A lot of other good info on that site as well.-KyleRead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Lycoming O-235 to purchase
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Pietenpol-List: Re: Lycoming O-235 to purchase

Post by matronics »

Original Posted By: "carson"
I had hoped more good info would be on for you by now. -the prices I have heardposted since-haven't sounded too out of line.as soon as I said what I did aboutthe 235 I got to thinking it may be the O-290 that was the one that seemedto be the more expensive one to get parts for.sorry if I gave any bad info. eitherway if that case and crank is use-able- it sounds to me like a good deal.ifthe weight is in the green- that should be a heck of a power plant on a Piet.mightbe awful heavy with a starter but I bet they aren't that hard to prop.RaymondRead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Lycoming O-235 to purchase
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Post by matronics »

Original Posted By: "Gboothe5"
I Have done some searches and the weight should be close to the Corvair but Jerryshould have a better ideaI think around 250lbs but don't quote me on that it was a while agoRead this topic online here:http://forums.matronics.com/viewtopic.p ... __________
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RE: Pietenpol-List: Re: Bending 5052 Fuel Tank

Post by matronics »

Original Posted By: owner-pietenpol-list-server(at)matronics.com
Carson,I used Avex pop rivets...had a bunch leftover from a previous project. Theheads of my rivet gun and puller are concaved out so that they leave a domedhead on the rivet...pretty cool. This was done according to the Zodiac 601plans.Pro-seal worked great, but I have only run 5 gals of fuel thru the tank.Gary from Cool-----Original Message-----
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Pietenpol-List: Re: Bending 5052 Fuel Tank

Post by matronics »

Original Posted By: Lawrence Williams
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