Original Posted By: "Glenn Thomas"
Pietenpol-List: Ribs and sanding
RE: Pietenpol-List: Ribs and sanding
Original Posted By: owner-pietenpol-list-server(at)matronics.com
Ben,AC 43.13, Section 1, Paragraph 5, quote, "...Sandpaper must never be used tosmooth softwood surfaces that are to be glued. Sawed surfaces must approachwell-planed surfaces in uniformity, smoothness, and freedom from crushedfibers..."Fortunately, though, almost all the strength in our ribs comes from thegussets.Gary BootheCool, Ca.PietenpolWW Corvair ConversionTail done, working on fuselage(11 ribs down)-----Original Message-----
Ben,AC 43.13, Section 1, Paragraph 5, quote, "...Sandpaper must never be used tosmooth softwood surfaces that are to be glued. Sawed surfaces must approachwell-planed surfaces in uniformity, smoothness, and freedom from crushedfibers..."Fortunately, though, almost all the strength in our ribs comes from thegussets.Gary BootheCool, Ca.PietenpolWW Corvair ConversionTail done, working on fuselage(11 ribs down)-----Original Message-----
Pietenpol-List: Ribs and sanding
Original Posted By: Ben Ramler
Pietenpol-List: Re: Ribs and sanding
Original Posted By: "Bill Church"
yes the weight did include oil in the case.,but not the carb or the exhaust stacksexcept the cast iron headers.Read this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Ribs and sanding
yes the weight did include oil in the case.,but not the carb or the exhaust stacksexcept the cast iron headers.Read this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Ribs and sanding
Original Posted By: Ben Ramler
Not sure if I should step into this one, since it looks like there is some confusion,but here goes anyway.I'm going to assume that Ben's question has to do with sanding the bonding surfaceof the plywood gussets for his wing ribs. If that's right, then Glenn's replyis what you're looking for. Just scuff up the surface, since plywood can havea "glazed" surface as it is received. This glazed surface just needs to bescratched a bit to permit the epoxy to penetrate the plywood and make a decentbond. You shouldn't really be removing material from the plywood, just makingit more bond-able.Gary's comments refer more to glue joints for end-grain spruce (or whatever softwoodyou are building with). When spruce is sawn, the end grain has open poreswhich will absorb the adhesive. If the end is sanded (and especially if thewood gets burned in sanding), the pores tend to get clogged, which impedes theabsorption of the adhesive. If the epoxy doesn't "bite" into the wood, the jointwill not achieve the strength that is needed. That is a bad thing.So, Ben, if you are asking about sanding the "gluing side" of the plywood gussets,then, yes you should sand them, like Glenn said. If that's not what you'reasking, then maybe you need to re-state your question more clearly.Bill C.Read this topic online here:http://forums.matronics.com/viewtopic.p ... ______Date: Mon, 4 Aug 2008 20:24:45 -0700 (PDT)
Not sure if I should step into this one, since it looks like there is some confusion,but here goes anyway.I'm going to assume that Ben's question has to do with sanding the bonding surfaceof the plywood gussets for his wing ribs. If that's right, then Glenn's replyis what you're looking for. Just scuff up the surface, since plywood can havea "glazed" surface as it is received. This glazed surface just needs to bescratched a bit to permit the epoxy to penetrate the plywood and make a decentbond. You shouldn't really be removing material from the plywood, just makingit more bond-able.Gary's comments refer more to glue joints for end-grain spruce (or whatever softwoodyou are building with). When spruce is sawn, the end grain has open poreswhich will absorb the adhesive. If the end is sanded (and especially if thewood gets burned in sanding), the pores tend to get clogged, which impedes theabsorption of the adhesive. If the epoxy doesn't "bite" into the wood, the jointwill not achieve the strength that is needed. That is a bad thing.So, Ben, if you are asking about sanding the "gluing side" of the plywood gussets,then, yes you should sand them, like Glenn said. If that's not what you'reasking, then maybe you need to re-state your question more clearly.Bill C.Read this topic online here:http://forums.matronics.com/viewtopic.p ... ______Date: Mon, 4 Aug 2008 20:24:45 -0700 (PDT)
Pietenpol-List: Re: Ribs and sanding
Original Posted By: charles loomis
Re: Pietenpol-List: How hard is it to get into the front seat
Original Posted By: "charles loomis"
Charley,Keri-Ann Price sells plans for a modification to add a door to the passenger seat. Her website is:http://www.geocities.com/keriannprice/P ... lGreg----- Original Message -----
Charley,Keri-Ann Price sells plans for a modification to add a door to the passenger seat. Her website is:http://www.geocities.com/keriannprice/P ... lGreg----- Original Message -----
RE: Pietenpol-List: Re: Ribs and sanding
Original Posted By: "Phillips, Jack"
Re: Pietenpol-List: How hard is it to get into the front seat
Original Posted By: gcardinal
CharleyFor what its worth I was considering the door also. I was just really concernedreluctant to cut the upper longeron weakening the structure for an occasionalrider. That thought was reaffirmed by my tech councelor. You may want to reconsiderthat alsoJohn------Original Message------
CharleyFor what its worth I was considering the door also. I was just really concernedreluctant to cut the upper longeron weakening the structure for an occasionalrider. That thought was reaffirmed by my tech councelor. You may want to reconsiderthat alsoJohn------Original Message------
Pietenpol-List: How hard is it to get into the front seat
Original Posted By: "walt"
Re: Pietenpol-List: Re: Ribs and sanding
Original Posted By: Marc Davis
End grain cannot be succesfully glued. It may hold for ashort time with little stress on it but you'd better not trustyour backside to it. Glueing edge or flat grain will holdup to the strength of the fibers.Sanded joints will never be as strong as planed or scrapedones. Wood faces should also be fresh at the time ofglueing. The best way is to learn how to use and properlysharpen cabinet scrapers. It's not that hard but does haveit's own learning curve. Isn't that what we're supposed tobe doing? Learning?http://woodgears.ca/scraper/index.htmlh ... .asp?"Life is change. Growth is optional. Choose wisely." ~Karen Kaiser ClarkClif>> Gary's comments refer more to glue joints for end-grain spruce (or > whatever softwood you are building with). When spruce is sawn, the end > grain has open pores which will absorb the adhesive. If the end is sanded > (and especially if the wood gets burned in sanding), the pores tend to get > clogged, which impedes the absorption of the adhesive. If the epoxy > doesn't "bite" into the wood, the joint will not achieve the strength that > is needed. That is a bad thing.> Bill C.________________________________________________________________________________
End grain cannot be succesfully glued. It may hold for ashort time with little stress on it but you'd better not trustyour backside to it. Glueing edge or flat grain will holdup to the strength of the fibers.Sanded joints will never be as strong as planed or scrapedones. Wood faces should also be fresh at the time ofglueing. The best way is to learn how to use and properlysharpen cabinet scrapers. It's not that hard but does haveit's own learning curve. Isn't that what we're supposed tobe doing? Learning?http://woodgears.ca/scraper/index.htmlh ... .asp?"Life is change. Growth is optional. Choose wisely." ~Karen Kaiser ClarkClif>> Gary's comments refer more to glue joints for end-grain spruce (or > whatever softwood you are building with). When spruce is sawn, the end > grain has open pores which will absorb the adhesive. If the end is sanded > (and especially if the wood gets burned in sanding), the pores tend to get > clogged, which impedes the absorption of the adhesive. If the epoxy > doesn't "bite" into the wood, the joint will not achieve the strength that > is needed. That is a bad thing.> Bill C.________________________________________________________________________________