gullikson Posted December 3, 2008 Share Posted December 3, 2008 My thinking on this difference is that when the Long-EZ plans were published, there was no mention of removing the cross threads in the glass tape. Not removing the cross threads keeps the bundles from flattening out as much as if they are removed. Maybe this would not account for the mismatch but I know from test layups before I did the caps that the layups with the cross threads intact were thicker. Quote Link to comment Share on other sites More sharing options...
TMann Posted December 3, 2008 Author Share Posted December 3, 2008 A friend (two doors down from me) stopped by Saturday as I was doing the top spar cap on the canard. As he walked in he laughed and said "Don't forget to pull out those cross threads!" I said I was and he looked shocked. Seems they didn't require that on his composite project. If you were building from the original plans you would not be doing that but seeing as I built the Roncz canard first (where they call this out) it's now obvious. I don't see how you could possibly ensure that the fibers were running straight without the ability to comb them out. I have to figure that my CS Spar will be at least 50% stronger as a result. Denser fiber count and less epoxy. Quote T Mann - Loooong-EZ/20B Infinity R/G Chpts 18 Velocity/RG N951TM Mann's Airplane Factory We add rocket's to everything! 4, 5, 6, 7, 8. 9, 10, 14, 19, 20 Done Link to comment Share on other sites More sharing options...
Marc Zeitlin Posted December 3, 2008 Share Posted December 3, 2008 .... I have to figure that my CS Spar will be at least 50% stronger as a result...Boy, I wish that were all it took to get 50% higher strength. Quote Marc J. ZeitlinBurnside Aerospacemarc_zeitlin@alum.mit.eduwww.cozybuilders.org copyright © 2023 Link to comment Share on other sites More sharing options...
TMann Posted December 5, 2008 Author Share Posted December 5, 2008 Boy, I wish that were all it took to get 50% higher strength. ....... well maybe only 45%. My tapes showed up today so I have everythig ready to go for the bottom spar cap. I'm not sure I can wrap up 14 by the end of the weekend but it's going to be real close if I don't. I'm pretty much after it every day now and I'm marking stuff off my list. I have to admit, it's tough keeping up with folks like Jack & JTest. ....working ..... working ..... Quote T Mann - Loooong-EZ/20B Infinity R/G Chpts 18 Velocity/RG N951TM Mann's Airplane Factory We add rocket's to everything! 4, 5, 6, 7, 8. 9, 10, 14, 19, 20 Done Link to comment Share on other sites More sharing options...
TMann Posted December 6, 2008 Author Share Posted December 6, 2008 I just finished my bottom spar cap tonight after work. That gives me a good jump on the weekend ......... and there's still time for beer! Quote T Mann - Loooong-EZ/20B Infinity R/G Chpts 18 Velocity/RG N951TM Mann's Airplane Factory We add rocket's to everything! 4, 5, 6, 7, 8. 9, 10, 14, 19, 20 Done Link to comment Share on other sites More sharing options...
mfryer Posted December 6, 2008 Share Posted December 6, 2008 I just finished my bottom spar cap tonight after work. That gives me a good jump on the weekend ......... and there's still time for beer! It is important to allow enought time for large layups. Dont forget to allow a little extra for the after layup beer! Quote Link to comment Share on other sites More sharing options...
TMann Posted December 6, 2008 Author Share Posted December 6, 2008 It is important to allow enought time for large layups. Dont forget to allow a little extra for the after layup beer!Excellect point, PTM. I'll take that to heart. Quote T Mann - Loooong-EZ/20B Infinity R/G Chpts 18 Velocity/RG N951TM Mann's Airplane Factory We add rocket's to everything! 4, 5, 6, 7, 8. 9, 10, 14, 19, 20 Done Link to comment Share on other sites More sharing options...
TMann Posted December 8, 2008 Author Share Posted December 8, 2008 Well ...... a good weekend's worth of work. I didn't get as far as I wanted. I'm ready for the 4 plies (back to front) at this point. I spent most of Saturday sanding the steps in the spar cap and rounding stuff off. Today I trimmed out the foam the goes on top of the Infinity mods to the spar to get everything back to the original dimensions. Once that was done I filled and hardshelled the foam so it's down to a couple of layups and it's toast. Things seemed to take longer than I planned but I am happy with the results. Quote T Mann - Loooong-EZ/20B Infinity R/G Chpts 18 Velocity/RG N951TM Mann's Airplane Factory We add rocket's to everything! 4, 5, 6, 7, 8. 9, 10, 14, 19, 20 Done Link to comment Share on other sites More sharing options...
mplafleur Posted December 8, 2008 Share Posted December 8, 2008 Well ...... a good weekend's worth of work. I didn't get as far as I wanted. I'm ready for the 4 plies (back to front) at this point. I spent most of Saturday sanding the steps in the spar cap and rounding stuff off. Today I trimmed out the foam the goes on top of the Infinity mods to the spar to get everything back to the original dimensions. Once that was done I filled and hardshelled the foam so it's down to a couple of layups and it's toast. Things seemed to take longer than I planned but I am happy with the results. Now you just need those gears. Coming up on three years for me.... Quote Mike LaFLeur - Cozy MkIV #1155N68ML Link to comment Share on other sites More sharing options...
TMann Posted December 15, 2008 Author Share Posted December 15, 2008 It's TOAST! Did the last layup today. It's under the electric blankets curing now. Moving on to Chapter 13. Quote T Mann - Loooong-EZ/20B Infinity R/G Chpts 18 Velocity/RG N951TM Mann's Airplane Factory We add rocket's to everything! 4, 5, 6, 7, 8. 9, 10, 14, 19, 20 Done Link to comment Share on other sites More sharing options...
TMann Posted December 18, 2008 Author Share Posted December 18, 2008 I finally got around to weighing my CS Spar. 42 ibs and that includes a 6 inch extension in the middle to accomodate my curved fuselage and the additional plies involved in preparing for the Infinity retracts. The weight is based on the accuracy of my bathroom scale so I figure it's close but not dead on. I have no Idea what is a normal or 'target' weight. Quote T Mann - Loooong-EZ/20B Infinity R/G Chpts 18 Velocity/RG N951TM Mann's Airplane Factory We add rocket's to everything! 4, 5, 6, 7, 8. 9, 10, 14, 19, 20 Done Link to comment Share on other sites More sharing options...
gullikson Posted December 18, 2008 Share Posted December 18, 2008 TMann, That weight seems good considering the extra dimensions. I just walked in the house from finishing the last big layup on my Long-EZ Centersection Spar. This would be the 2 ply UNI layup over the forward face. Feels good to almost be done with the spar. Now, need to decide whether to start the canard or assemble the fuse sides and bulkheads. Hmmm.... Quote Link to comment Share on other sites More sharing options...
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