You can't be that precise with paper templates anyway. I noticed that my rib template was short by 1/8 inch. I thought that kinko's printer scaled it...went through a bunch of file manipulation to make a dxf file and such...then thought i would check one that was already glued to a rib...nuts on...the paper shrank 0.3% The only way to avoid that is to print on mylar.
https://sites.google.com/site/mykr2stretch/ https://sites.google.com/site/mykr2stretch/parts-for-sale On May 28, 2013 8:29 PM, "Mark Langford" <ml at n56ml.com> wrote: > Phil Hill wrote: > > ...when faced with cutting out an >> airfoil profile, like the ones in our KR plans, do you cut outside the >> line, inside the line or right down the middle? The line is so thick, >> where you cut it, makes a difference. >> > > It won't matter if the size is a little large or small, or even if you > gradually deviate even .100", but as Larry said, be consistent. I modeled > and made the "new airfoil" drawings at http://www.krnet.org/as504x/** > templates.html <http://www.krnet.org/as504x/templates.html>, and I drew > them up with a .030" gap between two sets of lines. My logic for that was > to use the outer line to try to cut the airfoil out, but invariably you'll > cut off some of the line with the jigsaw, so the second line is there for > you to use a sanding block to get really close to the second line. With > some care, you could get an almost perfect outside shape. Of course, once > you start sanding the foam wings to shape using the airfoil templates as > guides, you'll alter the shape anyway. Bottom line with airfoil shapes is > to get it close to the intended shape, and it'll fly just fine. I went way > out of my way to build mine perfectly to the templates, and the wings to > have perfect dihedral and washout, and on my first flight I realized I was > going to have to put an aluminum trim tab on one of my ailerons, as well as > my elevator. It still flew fine though... > > Mark Langford > ML at N56ML.com > website at http://www.N56ML.com > ------------------------------**-------------------------- > > > ______________________________**_________________ > Search the KRnet Archives at > http://tugantek.com/**archmailv2-kr/search<http://tugantek.com/archmailv2-kr/search> > . > To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org > please see other KRnet info at http://www.krnet.org/info.html > see > http://list.krnet.org/mailman/**listinfo/krnet_list.krnet.org<http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org>to > change options >
