KR> A cautionary tale
Had the same thing happen to me. I came into possession of a partially completed KR-2 project. When I started to dissassemble things, I noticed a crack start at the WAF. By just pressing along the glue fillet with my thumb, the skin easily separated from the spar. I'm told they used a polyester based glue () to bond the skins to the spars. I'm told that since the skins are made with vinylester resin, that only a vinylester based glue should be used. Dan Diehl apparently sells this to builders. Has anyone else used something else with success? Also are there special precautions needed to prep skins and spars prior to bonding? Pete Klapp, KR-2S builder Canton, Ohio From: bearlk...@aol.com Reply-To: KRnet <kr...@mylist.net> To: kr...@mylist.net Subject: KR> A cautionary tale List-Post: krnet@list.krnet.org Date: Sun, 6 Aug 2006 12:48:45 EDT Netters; I just bought a KR2 project with Diehl wing skins. The builder had used the wrong glue and very poor technique to assemble the wings. It took me less than an hour and a couple of hand tools to ply them apart. The glue simply did not adhere to the wing skin, the bonds popped apart with hand pressure. The builder was obviously not a man to follow instructions, and I felt it was at least an amusing cautionary tale. Had this gotten to the air, it would have delaminated very quickly. OUCH! (the seller was a gracious gent from Tx and not the builder, he let me know what the issues were up front.) Incedently, I am very pleased with my purchase, I will salvage the skins and use a lot of the other parts to save a fair amount of time and money. Bob Polgreen Boat stage and parts Nowthen MN ___ Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net please see other KRnet info at http://www.krnet.org/info.html
KR> A cautionary tale
Pete, When you get ready to attach premade skins to the spars, you need to wipe clean first then lightly sand the spar attach area on the wing skins. Vinylester resin would be best. Paint the spar caps with pure resin and do the same to the wing skins before applying the flox mixture. If you do not paint pure resin on the wooden spars first you will probably end up with a too dry of resin/flox mixture when you attach the wing skins. Larry H. Pete Klapp <pke...@hotmail.com> wrote: Had the same thing happen to me. I came into possession of a partially completed KR-2 project. When I started to dissassemble things, I noticed a crack start at the WAF. By just pressing along the glue fillet with my thumb, the skin easily separated from the spar. I'm told they used a polyester based glue () to bond the skins to the spars. I'm told that since the skins are made with vinylester resin, that only a vinylester based glue should be used. Dan Diehl apparently sells this to builders. Has anyone else used something else with success? Also are there special precautions needed to prep skins and spars prior to bonding? Pete Klapp, KR-2S builder Canton, Ohio From: bearlk...@aol.com Reply-To: KRnet To: kr...@mylist.net Subject: KR> A cautionary tale List-Post: krnet@list.krnet.org Date: Sun, 6 Aug 2006 12:48:45 EDT Netters; I just bought a KR2 project with Diehl wing skins. The builder had used the wrong glue and very poor technique to assemble the wings. It took me less than an hour and a couple of hand tools to ply them apart. The glue simply did not adhere to the wing skin, the bonds popped apart with hand pressure. The builder was obviously not a man to follow instructions, and I felt it was at least an amusing cautionary tale. Had this gotten to the air, it would have delaminated very quickly. OUCH! (the seller was a gracious gent from Tx and not the builder, he let me know what the issues were up front.) Incedently, I am very pleased with my purchase, I will salvage the skins and use a lot of the other parts to save a fair amount of time and money. Bob Polgreen Boat stage and parts Nowthen MN ___ Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net please see other KRnet info at http://www.krnet.org/info.html ___ Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net please see other KRnet info at http://www.krnet.org/info.html
KR> A cautionary tale
Netters; I just bought a KR2 project with Diehl wing skins. The builder had used the wrong glue and very poor technique to assemble the wings. It took me less than an hour and a couple of hand tools to ply them apart. The glue simply did not adhere to the wing skin, the bonds popped apart with hand pressure. The builder was obviously not a man to follow instructions, and I felt it was at least an amusing cautionary tale. Had this gotten to the air, it would have delaminated very quickly. OUCH! (the seller was a gracious gent from Tx and not the builder, he let me know what the issues were up front.) Incedently, I am very pleased with my purchase, I will salvage the skins and use a lot of the other parts to save a fair amount of time and money. Bob Polgreen Boat stage and parts Nowthen MN
KR> A cautionary tale
Bob: Such is life in the "Take over" world. I took over a project where the guy decided he had to re-set the stick lower to the point rwhere the spar limited the sticks forward travel so the D.S. notched the top of the spar and spent alot of time trying to figure out how to avoid tearin out the center spar and starting over again. There have been some other issues but that was a biggie. Don bearlk...@aol.com wrote: > Netters; > I just bought a KR2 project with Diehl wing skins. The builder had used the > wrong glue and very poor technique to assemble the wings. It took me less than > an hour and a couple of hand tools to ply them apart. The glue simply did not > adhere to the wing skin, the bonds popped apart with hand pressure. The > builder was obviously not a man to follow instructions, and I felt it was at > least > an amusing cautionary tale. > Had this gotten to the air, it would have delaminated very quickly. OUCH! > (the seller was a gracious gent from Tx and not the builder, he let me know > what > the issues were up front.) > Incedently, I am very pleased with my purchase, I will salvage the skins and > use a lot of the other parts to save a fair amount of time and money. > > Bob Polgreen > Boat stage and parts > Nowthen MN > ___ > Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp > to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net > please see other KRnet info at http://www.krnet.org/info.html
KR> A cautionary tale
At 02:11 PM 8/6/2006, you wrote: >I took over a project where the guy decided he >had to re-set the stick lower to the point rwhere the spar limited >the sticks forward >travel so the D.S. notched the top of the spar >Don +++ If he had stopped and thought for a second he could have just re-shaped the stick. Sometimes we don't see the forest for the trees. Larry Flesner
KR> A cautionary tale
Larry: Worse than that I have found no reason for him to have set the stick ass'y so low on the spar! Still have not ffigured that one out but it has been fixed but it sure created a lot of difficulty to much of this was done originally without much in the way and now had to be done with several jigs and things to assure things went in the right place so as not to set of a chain reation of corrections. Don Larry Flesner wrote: > At 02:11 PM 8/6/2006, you wrote: > >I took over a project where the guy decided he > >had to re-set the stick lower to the point rwhere the spar limited > >the sticks forward > >travel so the D.S. notched the top of the spar > >Don > +++ > > If he had stopped and thought for a second he could have just re-shaped > the stick. Sometimes we don't see the forest for the trees. > > Larry Flesner > > ___ > Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp > to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net > please see other KRnet info at http://www.krnet.org/info.html
KR> A cautionary tale
On Sun, 6 Aug 2006 12:48:45 EDT bearlk...@aol.com writes: > Netters; > I just bought a KR2 project with Diehl wing skins. The builder had > used the > wrong glue and very poor technique to assemble the wings. It took me > less than > an hour and a couple of hand tools to ply them apart. The glue > simply did not > adhere to the wing skin, the bonds popped apart with hand pressure. > The > builder was obviously not a man to follow instructions, and I felt > it was at least > an amusing cautionary tale. > Had this gotten to the air, it would have delaminated very quickly. > OUCH! > (the seller was a gracious gent from Tx and not the builder, he let > me know what > the issues were up front.) > Incedently, I am very pleased with my purchase, I will salvage the > skins and > use a lot of the other parts to save a fair amount of time and > money. > > > Bob Polgreen > Boat stage and parts > Nowthen MN I found the same problem (and worse) when I acquired my KR project. The first builder had failed to scrub the mold release off the skin before attempting to bond them together. It peeled apart quite nicely. :o) Despite the various problems, buying a partial project was a bit time saver and it now has 9 years and 580 flight hours behind it. Jeff Scott N1213W
