Pietenpol-List: front spar doug fir, rear spar spruce?

An archive of the Matronics Pietenpol Listserve.
Locked
matronics
Posts: 81779
Joined: Sat Mar 18, 2017 8:29 am

Pietenpol-List: front spar doug fir, rear spar spruce?

Post by matronics »

Original Posted By: Ken Chambers
Subject: Pietenpol-List: front spar doug fir, rear spar spruce?
matronics
Posts: 81779
Joined: Sat Mar 18, 2017 8:29 am

RE: Pietenpol-List: front spar doug fir, rear spar spruce?

Post by matronics »

Original Posted By: owner-pietenpol-list-server(at)matronics.com
Ken,The center section between the cabanes doesn't get much bending load so, ifthere are any significant modulus differences, it shouldn't matter.Mike Hardaway _____
matronics
Posts: 81779
Joined: Sat Mar 18, 2017 8:29 am

Re: Pietenpol-List: front spar doug fir, rear spar spruce?

Post by matronics »

Original Posted By: Robert Ray
Subject: Pietenpol-List: cablesUsed 7x19--- like Jack said, easier to get around thimbles and work with. ________________________________________________________________________________Date: Mon, 28 Sep 2009 21:32:13 -0400Subject: Re: Pietenpol-List: front spar doug fir, rear spar spruce?
matronics
Posts: 81779
Joined: Sat Mar 18, 2017 8:29 am

Re: Pietenpol-List: Re: Wood Options

Post by matronics »

Original Posted By: Robert Ray
Subject: Re: Pietenpol-List: Re: Wood Options
matronics
Posts: 81779
Joined: Sat Mar 18, 2017 8:29 am

Re: Pietenpol-List: Re: Wood Options

Post by matronics »

Original Posted By: Ryan Mueller
Subject: Pietenpol-List: FAASafety.gov - Unapproved Parts Notification "UnapprovedParts Notification"Of possible interest-- seems like a good thing to check once in a while, like theweather before you go flying. Mike C. Unapproved Parts NotificationNotice Number: NOTC1921It has come to our attention that not all users are aware that the Unapproved Parts Notification program is now hosted on the FAA website at http://www.faa.gov/aircraft/safety/programs/sups/upn/. You should refer to this site on a regular basis to get the latest Unapproved Parts Notifications.In fact, general information and guidance about the Suspected Unapproved Parts Program is available at http://www.faa.gov/aircraft/safety/programs/sups/.You have received this notice from FAASafety.gov because you have selected "Unapproved Parts Notification" in your preferences on your FAASafety.gov account. Click here to log in and edit your preferences on FAASafety.gov.Start FAASTeam CFI Workshops any time! Find Workshop #4 in SPANS.FAASafety.gov | Email Preferences | Opt OutDo not reply to this email as it is an unmonitored mailbox. Contact us for comments or questions.________________________________________________________________________________Date: Mon, 28 Sep 2009 20:47:58 -0500Subject: Re: Pietenpol-List: Re: Wood Options
matronics
Posts: 81779
Joined: Sat Mar 18, 2017 8:29 am

Post by matronics »

Original Posted By: Ross Alexander
matronics
Posts: 81779
Joined: Sat Mar 18, 2017 8:29 am

Re: Pietenpol-List: front spar doug fir, rear spar spruce?

Post by matronics »

Original Posted By: Ken Chambers
Subject: Re: Pietenpol-List: front spar doug fir, rear spar spruce?
matronics
Posts: 81779
Joined: Sat Mar 18, 2017 8:29 am

Re: Pietenpol-List: front spar doug fir, rear spar spruce?

Post by matronics »

Original Posted By: Dave and Connie
I wouldn't worry about it. Basicaly all those things do ishold everything else in place and provide attachment pointsfor cabanes, wing panels, etc. Look at the Moth series ofAC. The crossbar between the cabanes is a small diametertube, What you see as airfoil is actually only the fuel tank.Clif Well I would use the DF in the front, don't think the modulus of elasticity would matter since lots of airfoils have spars of different widths. Thats what i would do however I no expert. On Mon, Sep 28, 2009 at 8:27 PM, mike wrote: Ken, The center section between the cabanes doesn't get much bending load so, if there are any significant modulus differences, it shouldn't matter. Mike Hardaway________________________________________________________________________________Date: Mon, 28 Sep 2009 22:57:23 -0400
matronics
Posts: 81779
Joined: Sat Mar 18, 2017 8:29 am

Re: Pietenpol-List: Spar splice

Post by matronics »

Original Posted By: shad bell
If you are building a one piece wing buying and shipping 30 ft spars would be prohibitive if you could even find them.Mike McGowan building rib jig ----- Original Message -----
matronics
Posts: 81779
Joined: Sat Mar 18, 2017 8:29 am

Pietenpol-List: Spar splice

Post by matronics »

Original Posted By: Mike Tunnicliffe
matronics
Posts: 81779
Joined: Sat Mar 18, 2017 8:29 am

Re: Pietenpol-List: front spar doug fir, rear spar spruce?

Post by matronics »

Original Posted By: "Clif Dawson"
Yes they do but we are dealing with one of spruce, theother of fir. The question being is it going to make adifference which one goes where. Since the weaker one,made of spruce, is the "gold standard" as it were, thenthe point is moot. The fir being stronger is overkill.We are, of course, assuming that both have the samedimensions.Clif Hi, the spars in the centre section see fairly high compression loads, Regards Mike T.________________________________________________________________________________
matronics
Posts: 81779
Joined: Sat Mar 18, 2017 8:29 am

Re: Pietenpol-List: Re: No RPM drop on mag check??

Post by matronics »

Original Posted By: Robert Ray
Ribs! forget the ribs. I'm all tanked up! Well, almost.Clif>> Still with the ribs! What's with you guys and the ribs! I did get 3/4 of > my> center section built last weekend! (sure wish I had built those ribs > first!)>> Gary Boothe________________________________________________________________________________Date: Tue, 29 Sep 2009 05:33:41 -0400Subject: Re: Pietenpol-List: Re: No RPM drop on mag check??
matronics
Posts: 81779
Joined: Sat Mar 18, 2017 8:29 am

Re: Pietenpol-List: Spar splice

Post by matronics »

Original Posted By: helspersew(at)aol.com
matronics
Posts: 81779
Joined: Sat Mar 18, 2017 8:29 am

Pietenpol-List: Spar splice

Post by matronics »

Original Posted By: H RULE
Locked