Original Posted By: "Jack"
HiHas anybody considered the plywood spar with spruce caps as used by Aussie Peter. It seems the quality would be more consistent and the cost would probably be less than getting a long length off spar material shipped. The ply would need to be spliced but even though it migh be a bit more work would result in a stronger and with the smaller web thickness probably comparable weight. Would like to hear your thoughts.Steve In Maine ________________________________________________________________________________
Pietenpol-List: Plywood web spar
RE: Pietenpol-List: Plywood web spar
Original Posted By: "Peter W Johnson"
Steve,I did just that and probably would not do it next time. The advantages youmention are correct. The additional work and time is tremendous. Scarfing3/8th material is not much fun. It took some practice to get it perfect. Idid mine 10 to 1 and with some coaching from my TA am adding doublers at thejoints. Mine are capped with Douglas fir. Alls things considered, I woulduse =BE inch Sitka. The archive has plenty of info on it. Attached is asketch showing mine, additional pictures are on my site andhttp://westcoastpiet.com/. Good luck,Jackwww.textors.com HiHas anybody considered the plywood spar with spruce caps as used by AussiePeter. It seems the quality would be more consistent and the cost wouldprobably be less than getting a long length off spar material shipped. Theply would need to be spliced but even though it migh be a bit more workwould result in a stronger and with the smaller web thickness probablycomparable weight. Would like to hear your thoughts.Steve In Maine10/03/0906:20:00________________________________________________________________________________
Steve,I did just that and probably would not do it next time. The advantages youmention are correct. The additional work and time is tremendous. Scarfing3/8th material is not much fun. It took some practice to get it perfect. Idid mine 10 to 1 and with some coaching from my TA am adding doublers at thejoints. Mine are capped with Douglas fir. Alls things considered, I woulduse =BE inch Sitka. The archive has plenty of info on it. Attached is asketch showing mine, additional pictures are on my site andhttp://westcoastpiet.com/. Good luck,Jackwww.textors.com HiHas anybody considered the plywood spar with spruce caps as used by AussiePeter. It seems the quality would be more consistent and the cost wouldprobably be less than getting a long length off spar material shipped. Theply would need to be spliced but even though it migh be a bit more workwould result in a stronger and with the smaller web thickness probablycomparable weight. Would like to hear your thoughts.Steve In Maine10/03/0906:20:00________________________________________________________________________________
RE: Pietenpol-List: Plywood web spar
Original Posted By: owner-pietenpol-list-server(at)matronics.com
Jack/Steve,Looking at your sketch I notice you used an =93I=94 beam construction. I usedthe =93U=94 beam method. I made up a jig to scarfe the ply and after a bit ofpractice got quite proficient at it. There are some pictures on my web siteof the jig and showing a circular saw doing the work. The spar infillblocking was spruce with ply on top. Jigging the spar when building canresult in a dead straight spar, rather than relying on the quality of thespar material.I bought all my spruce from AS&S and it was cheaper to get the cap stripsrather than complete spar material.I would certainly do it again. I have demonstrated the strength of the sparwith a couple of off runway excursions.I purchased a set of UK PFA approved plans which included the made up sparamongst other mods.Go for whatever suits you.CheersPeterWonthaggi Australiahttp://www.cpc-world.com
Jack/Steve,Looking at your sketch I notice you used an =93I=94 beam construction. I usedthe =93U=94 beam method. I made up a jig to scarfe the ply and after a bit ofpractice got quite proficient at it. There are some pictures on my web siteof the jig and showing a circular saw doing the work. The spar infillblocking was spruce with ply on top. Jigging the spar when building canresult in a dead straight spar, rather than relying on the quality of thespar material.I bought all my spruce from AS&S and it was cheaper to get the cap stripsrather than complete spar material.I would certainly do it again. I have demonstrated the strength of the sparwith a couple of off runway excursions.I purchased a set of UK PFA approved plans which included the made up sparamongst other mods.Go for whatever suits you.CheersPeterWonthaggi Australiahttp://www.cpc-world.com
Re: Pietenpol-List: reinforced "end" ribs
Original Posted By: Robert Ray
Peter,You website, and explanations are great. Thanks for adding all the detail to helpall of us newbies.TK--------Tom KreinerRead this topic online here:http://forums.matronics.com/viewtopic.p ... ______Date: Sun, 4 Oct 2009 09:29:15 -0400Subject: Re: Pietenpol-List: reinforced "end" ribs
Peter,You website, and explanations are great. Thanks for adding all the detail to helpall of us newbies.TK--------Tom KreinerRead this topic online here:http://forums.matronics.com/viewtopic.p ... ______Date: Sun, 4 Oct 2009 09:29:15 -0400Subject: Re: Pietenpol-List: reinforced "end" ribs
Re: Pietenpol-List: Plywood web spar
Original Posted By: Robert Ray
Subject: Re: Pietenpol-List: Plywood web spar
Subject: Re: Pietenpol-List: Plywood web spar
Re: Pietenpol-List: Plywood web spar
Original Posted By: Robert Ray
Subject: Re: Pietenpol-List: Plywood web spar
Subject: Re: Pietenpol-List: Plywood web spar
Re: Pietenpol-List: Plywood web spar
Original Posted By: rray032003(at)gmail.com
I would also use 45deg ply. I considerd it due to cost as I have more time than money=2C but I'm going to use 3/4 spruce for siplicity. I like simpleDoug DeverIn beautiful Stow OhioDate: Sun=2C 4 Oct 2009 09:13:19 -0400Subject: Re: Pietenpol-List: Plywood web spar
I would also use 45deg ply. I considerd it due to cost as I have more time than money=2C but I'm going to use 3/4 spruce for siplicity. I like simpleDoug DeverIn beautiful Stow OhioDate: Sun=2C 4 Oct 2009 09:13:19 -0400Subject: Re: Pietenpol-List: Plywood web spar
Re: Pietenpol-List: Plywood web spar
Original Posted By: Robert Ray
Subject: Re: Pietenpol-List: Plywood web spar
Subject: Re: Pietenpol-List: Plywood web spar
Re: Pietenpol-List: Plywood web spar
Original Posted By: Steve Glass
I have no scarfs in mine, I got 16' lengths of 1x12" poplar and cut my spars outof that. It too took a good bit or work getting straight piece out of them butthey did yield some nice 1 inch spar material. Once cut and angled the topedge to match the rib, I mounted them on to my bench jig and routed them out.Lumber that long from the mill does take some work to get the hook amd twist outof. That gave me the full finished dimension spars. Lots of work but got some nicestraight un- spliced spars to work with. John------Original Message------
I have no scarfs in mine, I got 16' lengths of 1x12" poplar and cut my spars outof that. It too took a good bit or work getting straight piece out of them butthey did yield some nice 1 inch spar material. Once cut and angled the topedge to match the rib, I mounted them on to my bench jig and routed them out.Lumber that long from the mill does take some work to get the hook amd twist outof. That gave me the full finished dimension spars. Lots of work but got some nicestraight un- spliced spars to work with. John------Original Message------
Re: Pietenpol-List: Plywood web spar
Original Posted By: John Fay
Subject: Re: Pietenpol-List: Plywood web spar
Subject: Re: Pietenpol-List: Plywood web spar
Pietenpol-List: Re: Push/Pull on elevator
Original Posted By: "tkreiner"
________________________________________________________________________________Subject: Pietenpol-List: Re: Push/Pull on elevator
________________________________________________________________________________Subject: Pietenpol-List: Re: Push/Pull on elevator
> Re: Pietenpol-List: Plywood web spar
Original Posted By:> rray032003(at)gmail.com
> Subject: Re: Pietenpol-List: Plywood web spar
> Subject: Re: Pietenpol-List: Plywood web spar