Hi Stephen I´m Eduardo Iglesias, from La Pampa, Argentina and I know Eduardo Barros -he leaves near Buenos Aires- and his work. If you have any comunication problems, tell me and I can help you, with pleasure. Regards Eduardo
----- Original Message ----- From: "Stephen Jacobs" <ask...@microlink.zm> To: "'KRnet'" <kr...@mylist.net> Sent: Thursday, October 21, 2004 12:35 PM Subject: RE: KR> Glass fuse > You worry me when you say it is not good !!! > > who is zeke Smith > > +++++++++++++++++++++++++++++ > > Hey Ron - As the man always says, your results may differ. > > I discussed my concerns with Eduardo (this took some time as he speaks > Spanish and I speak English). He certainly is a bright guy and appears > to have done his homework. Everything else he has done is near perfect, > including anodizing his ali parts and making up his own legs and leg > attachments, fuel tanks etc. One other South American (Leo, he speaks > English) is doing similar things with a GP4, in this case the wing was > originally designed for a ply skin, but Leo is doing a KR wing type > skin, but staying with the original design spars. > http://www.geocities.com/leoadrena/GP4.html > > Leo built a nice KR before, so he has been around DIY airplanes for a > while. > > Zeke Smith has written various books and articles on composite > structures - I see him as knowledgeable in these matters. If he > perceives a problem with mixing E-glass and Carbon fibre in the same > lay-up due to the differences in stiffness (as suggested in the extract > I included) - I must wonder to what extent the same problem will be > present in Eduardo's Structure - he is mixing ply with glass. > > For that matter, how wise is it for Leo to build the wing sub-structure > (spars /ribs etc.) according to the plans and then completely change the > wing skin from ply to mould-less composite (not even a true sandwich)? > > I don't know, but my hopes are that one of the netters has an informed > opinion and will share it with us. > > My strong interest is with Eduardo's way - I suppose the question really > is which is "stiffer", the spruce frame or the foam/glass composite. > > If the Composite component of Eduardo's airplane is stiffer and takes > the initial load, all is well (if the glass bit is spec'd to do the > job.) The spruce frame goes along for the ride. > > If the spruce frame is stiffer and loads up first - it may not be strong > enough without the ply skin and fail. > > We both seem to like his approach, so let me know if you learn any more. > > Take care > Steve J > > > > _______________________________________ > to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net > please see other KRnet info at http://www.krnet.org/info.html > --- > [This E-mail scanned for viruses by Declude Virus] > > --- [This E-mail scanned for viruses by Declude Virus]
