I saw some references to joiners on this thread and thought I'd wade in a bit. I have been using 4130 steel tubing for my large model joiners. My 13 foot RES ship stalled a good winch in Dallas with a tubing joiner...of course it was .5 dia with .120 wall thickness. I got some 7/16 with .120 wall recently for my Legionair project, and it has stood up well, too. It has to be cleaned up a bit when you get it, but a lathe or drill press and some fine emery or crocus cloth and it polishes right up...from Aircraft Spruce and Specialty. The 7/16 stuff has already been tortured pretty well, with 1400 sq. in. pulling against it, if it hasn't bent, it ain't gonna. I'm thinking of getting some thinner wall stuff for less windy days, to lower my wing loading. Maybe that info will help someone else......my best to you all.
Jack Womack --- Michael Martz <[EMAIL PROTECTED]> wrote: > Hello, > > Im getting ready to bag a 114" two piece wing and I > am debating as to > what thickness of spar I need to put in. I wanted > to put in a 1/2" > diameter carbon tube but they are $37 apiece..a bit > pricey. Will I > be ok with the 1/4" diameter? They are only $15 > apiece..more in line > with my budget. Im just not sure if I am sacrificing > a huge amount of > strength going with the 1/4". I plan to bag with > obechi with a 2 oz > layer of glass underneath. Any help would be > appreciated. > > Thanks, > > MM > RCSE-List facilities provided by Model Airplane > News. Send "subscribe" and "unsubscribe" requests > to [EMAIL PROTECTED] __________________________________________________ Do You Yahoo!? Yahoo! - Official partner of 2002 FIFA World Cup http://fifaworldcup.yahoo.com RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
