ULF-1 Discussion Archive
Anonymous static archive of the former Mailman list
Anonymous static archive of the former Mailman list
Re: [ULF-1] Help to find GL1 Plywood
Hi, GL1 is available, but difficult to find now as the inspection process is expensive. Basically, it all comes out of Koskissen's factory in Finland and small batches are inspected and signed off as GL1. The reality is that the grade they submit for testing is the one you want which I think is A/B but I will check. There are two UK suppliers of this plywood which is checked/inspected to a standard agreed with the UK LAA which is pretty much an equivalent. Basically the maker's quality standards are high and the inspection involves checking for voids. I would suggest that you contact SATCO The Swindon aircraft timber company (search google) who should be able to help you if LAA standards are acceptable to you approving authority. What approval do you need? If I can help more, please email me. Regards, Colin Sent from my iPad > On 21 May 2018, at 21:39, Member 117 <[email]> wrote: > > Hi to all. > > I start looking for Plywood GL1 for start my ULF-1 project, but its hard to find. > > In same forums some user said the designation GL1 its no longer available since 2012, and the new designation is AB/B, this is true? in my mind this type off classification normally its for maritime plywood. > > I need help too understand, where i can find the correct birch plywood for my project in Europe preferably. > > I try to look for in Portugal is a waste of time, nobody gives me GL1. > > Thank you for your help. > > best regards for all from Portugal > > Member 117 > >> No dia [phone], às 22:03, [email] escreveu: >> >> Send Ulf-1 mailing list submissions to >> [email] >> >> To subscribe or unsubscribe via the World Wide Web, visit >> http://lists.ulf-1.com/listinfo.cgi/ulf-1-ulf-1.com >> or, via email, send a message with subject or body 'help' to >> [email] >> >> You can reach the person managing the list at >> [email] >> >> When replying, please edit your Subject line so it is more specific >> than "Re: Contents of Ulf-1 digest..." >> >> >> Today's Topics: >> >> 1. ULF-1 spar destructive test (Member 117) >> 2. Re: ULF-1 spar destructive test (Member 72) >> >> >> ---------------------------------------------------------------------- >> >> Message: 1 >> Date: Wed, 2 May 2018 14:54:25 +0100 >> From: Member 117 <[email]> >> To: [email] >> Subject: [ULF-1] ULF-1 spar destructive test >> Message-ID: <[email]> >> Content-Type: text/plain; charset="us-ascii" >> >> Good afternoon >> >> I am preparing all the materials to begin the construction of a ULF-1 in Portugal, and I saw on the web, that the EAA Chapter 309 in North Carolina performed a ULF-1 Spar destructive test, it is possible to have access to these data? and if the construction of the spar was carried out according to the instructions in the manual ? >> >> thank you >> >> Best regards, >> >> Member 117 >> >> >> -------------- next part -------------- >> An HTML attachment was scrubbed... >> URL: <http://lists.ulf-1.com/private.cgi/ulf-1-ulf-1.com/attachments/[phone]/8d12f2af/attachment-0001.html> >> >> ------------------------------ >> >> Message: 2 >> Date: Wed, 2 May 2018 17:00:29 -0400 >> From: Member 72 <[email]> >> To: [email] >> Subject: Re: [ULF-1] ULF-1 spar destructive test >> Message-ID: <[email]> >> Content-Type: text/plain; charset="utf-8" >> >> Hi Nuno, >> >> Good luck with your >> Build! We deviated from the plans with the attachment fittings at the wing roots. The plans call for tubular rivets to be used to attach the steel fittings to the spar caps. We did not have the tooling to fabricate these large rivets. So, at each station that required a rivet, we drilled a 1/2? hole and epoxied a nylon lug or bushing into the hole. The nylon lugs have a 1/4? hole drilled down the center to accept an AN-4 aviation bolt. We epoxied the steel spar fittings on, with their 1/4? holes pre-drilled to match the holes on the nylon lugs. Then, we added the bolts, washers and nuts. We were in contact with Member 9, the designer, at Aero in Germany. Because of our deviation to his plans on the most heavily loaded part of the airframe, he asked us to perform a destruction test and gave us a minimum breaking strength. Fortunately we were well over his minimum figure, and he blessed our design deviation! If we were to do it again, we would consider using 1/2? phenoli >> c rod rather than the nylon. But, the nylon lug material worked OK. >> >> Best regards, >> Member 72 >> >> >> >> Sent from my iPhone >> >>> On May 2, 2018, at 9:54 AM, Member 117 <[email]> wrote: >>> >>> Good afternoon >>> >>> I am preparing all the materials to begin the construction of a ULF-1 in Portugal, and I saw on the web, that the EAA Chapter 309 in North Carolina performed a ULF-1 Spar destructive test, it is possible to have access to these data? and if the construction of the spar was carried out according to the instructions in the manual ? >>> >>> thank you >>> >>> Best regards, >>> >>> Member 117 >>> >>> >>> _______________________________________________ >>> ULF-1 discussion list -- [email] >>> >>> Subscribe, Unsubscribe, Preferences, List information: >>> http://lists.ulf-1.com/listinfo.cgi/ulf-1-ulf-1.com >> -------------- next part -------------- >> An HTML attachment was scrubbed... >> URL: <http://lists.ulf-1.com/private.cgi/ulf-1-ulf-1.com/attachments/[phone]/ff554e2a/attachment-0001.html> >> >> ------------------------------ >> >> Subject: Digest Footer >> >> _______________________________________________ >> Ulf-1 mailing list >> [email] >> http://lists.ulf-1.com/listinfo.cgi/ulf-1-ulf-1.com >> >> >> ------------------------------ >> >> End of Ulf-1 Digest, Vol 69, Issue 1 >> ************************************ > > _______________________________________________ > ULF-1 discussion list -- [email] > > Subscribe, Unsubscribe, Preferences, List information: > http://lists.ulf-1.com/listinfo.cgi/ulf-1-ulf-1.com