Pietenpol-List Digest Archive

Thu 01/19/06


Total Messages Posted: 14



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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    Time: 05:34:22 AM PST US
    From: "Michael Turrell" <emtyit@3web.net>
    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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    Time: 07:36:44 AM PST US
    From: "Roman Bukolt" <conceptmodels@mailbag.com>
    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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    Time: 08:43:47 AM PST US
    From: "Steve Glass" <redsglass@hotmail.com>
    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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    Time: 08:56:17 AM PST US
    From: "Dick Navratil" <horzpool@goldengate.net>
    Subject: 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 5


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    Time: 09:24:06 AM PST US
    Subject: flying
    From: "Phillips, Jack" <Jack.Phillips@cardinal.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. 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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    Time: 10:07:25 AM PST US
    Subject: flying
    From: Hans Vander Voort <hans.vander.voort@alfalaval.com>
    --> 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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    Time: 02:16:58 PM PST US
    From: "walt evans" <waltdak@verizon.net>
    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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    Time: 02:35:50 PM PST US
    From: Rcaprd@aol.com
    Subject: Re: flying
    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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    Time: 02:48:53 PM PST US
    From: "Peter W Johnson" <vk3eka@bigpond.net.au>
    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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    Time: 03:02:41 PM PST US
    From: Steve Ruse <steve@wotelectronics.com>
    Subject: Re: flying
    --> 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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    Time: 03:25:29 PM PST US
    Subject: Fw: Loops and rolls
    From: Hans Vander Voort <hans.vander.voort@alfalaval.com>
    --> 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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    Time: 08:23:47 PM PST US
    Subject: Corvair Crank
    From: "Glenn Thomas" <glennthomas@charter.net>
    --> 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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    Time: 08:56:53 PM PST US
    From: Ron Franck <franck@geneseo.net>
    Subject: 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


    Message 14


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    Time: 09:45:18 PM PST US
    From: "Sterling" <sterling@pgrb.com>
    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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