jpolenek Posted March 7, 2008 Share Posted March 7, 2008 My local fiberglass vendor, who seems to know A LOT about composite materials, says he can supply me the Rutan UND and BID cloths. In the world of auditing, they say "in God we trust, everyone else needs evidence", so I'd like some way to verify that he actually has the right stuff. In the book Composite Basics, Marshall warns about substituting cloths that seem similar, so I want to be sure. Are there any technical specifications available for the Rutan BID and UND cloths, besides just the weight, that I can check to verify that I am purchasing the same (or comparable) product as supplied by ACS or Wicks? Joe Polenek Quote Joe Cozy Mk IV #1550 Link to comment Share on other sites More sharing options...
TMann Posted March 7, 2008 Share Posted March 7, 2008 If it comes from Hexcel and the numbers match, you're good to go. (Forget about the RA prefix.) 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...
raiki Posted March 8, 2008 Share Posted March 8, 2008 If it comes from Hexcel and the numbers match, you're good to go. (Forget about the RA prefix.) Or interglas. IIRC Burt originally used Interglas but then got Hexcel to make the same product. (not 100% sure on that, but something along those lines) Below is an extract antoher users site. Advanced Composites FFE280T1000 (Interglas 92125BID or RA5277) FFE220P1000 (Interglas 92145UND or RA5177) Quote Adrian Smart Cozy IV #1453 Link to comment Share on other sites More sharing options...
TMann Posted March 8, 2008 Share Posted March 8, 2008 Or interglas. IIRC Burt originally used Interglas but then got Hexcel to make the same product. (not 100% sure on that, but something along those lines) Below is an extract antoher users site. Advanced Composites FFE280T1000 (Interglas 92125BID or RA5277) FFE220P1000 (Interglas 92145UND or RA5177) The RA number must have come fro Wicks website. They post them in reverse order.ACS lists it as RA7725 & RA7715 Hexcel will know them as 7725 & 7715 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...
brainfart Posted March 12, 2008 Share Posted March 12, 2008 > FFE280T1000 (Interglas 92125BID or RA5277) > FFE220P1000 (Interglas 92145UND or RA5177) Is this confirmed? If it is, then this is great news. Every foreign builder needs to be made aware of this information. Over here in Europe those Interglas numbers are used extensively to describe glass cloth. This also means that Europeans can get the glass for cheap locally without having to order it from the US, 92125 and 92145 are easily available from every fiberglass supplier. 92125: 280g/m², twill weave, finish FKK/FRP144, dry thickness 0.35mm, thread count 7x6.5, yarn type warp/weft EC9-68x3tO x EC9-204Z (filament dia. 9µm), available colours: black, options: available with non-fraying treatment 92145: 220g/m², plain/UD weave, finish FKK/FRP144, dry thickness 0.25mm, thread count 6x7, yarn type warp/weft EC9-68x5tO x EC7-22Z (filament dia. 9µm, 7µm) What kind of finish does the Hexcel glass use? The available Interglas FKK/FRP144 is rated for aviation use, so I assume this is truely equivalent? Quote Link to comment Share on other sites More sharing options...
brainfart Posted March 12, 2008 Share Posted March 12, 2008 http://www.hexcel.com/NR/rdonlyres/EAA824B6-3AE3-4D5C-8EF2-BC548E2F8358/0/7725.pdf http://www.hexcel.com/NR/rdonlyres/C459571A-2AAE-493B-A608-C6F531D68D8D/0/7715.pdf Quote Link to comment Share on other sites More sharing options...
brainfart Posted March 13, 2008 Share Posted March 13, 2008 As the datasheets show, they are not equivalent. There are differences in fabric weight and yarn size. That would have been too easy. Oh well. Quote Link to comment Share on other sites More sharing options...
Juhl-EZ Posted March 13, 2008 Share Posted March 13, 2008 Is this confirmed? If it is, then this is great news. Every foreign builder needs to be made aware of this information. Over here in Europe those Interglas numbers are used extensively to describe glass cloth. This also means that Europeans can get the glass for cheap locally without having to order it from the US, 92125 and 92145 are easily available from every fiberglass supplier. For what it is worth, all Longs and Cozies build in Denmark have AFAIK been build using those Interglass cloths. AFAIK these where the ones originallay used by BR. Comparisons of Hexcel and Interglass types along eith and conlusions would be most welcome. I have attached an (old) Interglass datasheet showing the properties for both. Interglass.pdf Regards, Henrik Juhl Quote Link to comment Share on other sites More sharing options...
brainfart Posted March 13, 2008 Share Posted March 13, 2008 Thanks, I have an (equally old) interglas sample folder containing all these different glass types, that table is a welcome addition. Quote Link to comment Share on other sites More sharing options...
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