---------------------------------------------------------- Pietenpol-List Digest Archive --- Total Messages Posted Sun 12/09/07: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 07:20 AM - Control tube construction (Jack T. Textor) 2. 08:05 AM - Re: Control tube construction (Cuy, Michael D. (GRC-RXD0)[ASRC]) 3. 04:18 PM - Re: Adhesive comparison test results (MikeD) ________________________________ Message 1 _____________________________________ Time: 07:20:52 AM PST US Subject: Pietenpol-List: Control tube construction From: "Jack T. Textor" Freezing cold here, great day to work on the Piet. Where the control stick ears or tabs fit over the control tube, the plans show a 3/8 piece drilled for a =BC bolt that acts as a bearing which goes through and is welded to the control tube. Do I drill the ears or tabs with a =BC hole to fit over the bearing or drill them with a 3/8 hole to fit up flush with the bearing? Assuming the tabs fit over the bearing they will have to be spread apart to fit after the bearing is welded into the control tube. Sorry this is not very clear. Jack www.textors.com ________________________________ Message 2 _____________________________________ Time: 08:05:00 AM PST US Subject: RE: Pietenpol-List: Control tube construction From: "Cuy, Michael D. (GRC-RXD0)[ASRC]" Hello Jack, You drill the tabs for the bolt size of 1/4 inch to match the ID of the drilled 3/8" OD bearing tube that you welded into your control tube. I welded the 3/8" tube in place with excess length so I could custom grind/saw/file/sand it to fit the corresponding gap or opening in the tabs coming off my control stick. (s) Your question was quite clear I thought ! Mike C. ________________________________ Message 3 _____________________________________ Time: 04:18:34 PM PST US Subject: Pietenpol-List: Re: Adhesive comparison test results From: "MikeD" gbowen(at)ptialaska.net wrote: > Mike, little off topic for wood laminations and Pietenpols but if you'd > like to try a rubber modified laminating resin system (off the shelf), that > has some of the best properties for handlaminates try Hexcel's (now > HBFuller) 2315. Think Epoxical (now Endurance in St.Paul) making same > formula. First it's based on a bis-F epoxy but this epoxy is pre-adducted > with Hycar rubber. The liquid rubber precips out when cured and makes a two > phase laminate. Our test, before HB Fuller bought-out the Resins group, > indicated this was one of our best systems. I used it on my Cozy IV, 60 min > gel time, kinda hot exotherm when floxed too thick, but best stuff for > laminates that need to resist flex cracking. Scaled Composites used a bunch > of it for their contract drones work. > Gordon That is exactly the type of adhesive system we used to make, and yeah the rubber modifiers when used right sure do wonders for mechanicals. We used a variety of aliphatic amine curatives, 3 in particular, blended in varying proportions for different jobs, but in general so that cure rate was as rapid as possible without excessive exotherm. The basic blends were epoxy resin (Dow 362), Hycar, reactive diluent, wetting agent and defoamer, plus silica and fumed silica in the structural adhesive variations, both flowable and thixotropic. Now that I don't do that gig anymore, it's good to know a commercial system exists with the same formulating goals in mind. -------- Piet-builder-who-hopes-to-be-flying-next-summer Read this topic online here: http://forums.matronics.com/viewtopic.php?p=151375#151375 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message pietenpol-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Pietenpol-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/pietenpol-list Browse Digests http://www.matronics.com/digest/pietenpol-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.