You could file a piece of 9/16, .5625" to fit. Perhaps a metric chuck would be suitable to hold a 9/16 and you could turn it down to size if you don't have access to a lathe. Maybe a ½" would be close enough. Good luck with that crazy metric stuff!
Right bought a foot of 5/8 x 0.095 Aircraft Spruce Europe Germany. Going to take 0.035 off it which will leave me with 0.06000 see what happens. Thanks lads.
Uhh,let's do the math here. 5/8"= .625" .035 wall thickness times 2= .070" .625 minus .070 = .555".That would be an interference fit, and wouldn't go inside the 5/8 tube.4313 says, "fit the inner tube of the same material with the same or greater wall thickness, and a maximum diameter difference of 1/16 of an inch."So.There are your options. Either turn down the thicker tubing you ordered to under .555" a total PITA..orjust use a piece of half inch .035" tubing.
Figure out what lengths you need to put a BUTT splice BETWEEN the gear plates at Sta 3, you are going to weld all around each tube to each plate so you really don't need either an inside or outside splice on the 5/8 longeron. Plus the vertical tube that comes off the longeron between the plates will saddle the longeron and be welded all around it as well. The Cross tube does the same so we are talking a non-issue
However many have talked about going to 0.028 on the 5/8 and 1/2 tube. Les Homan is making his third legal eagle this time he is going with .028. Perhaps John Bolding could chime in he has built more fuselages of this type than anyone. No one is going to want to tell you that it is OK unless he is a hired engineer.The engineer that did the Double Eagle wing is a friend of mine, when he finished I asked him to do a back of the napkin workup on the Legal Eagle fuselage as I thought there might be some weight to be saved there. Long story short he said $5K of engineering MIGHT save 5-6#. Leonard went into rigor. The XL fuselage as drawn weighs 33-34#, Les is reducing it by about a third. I wish him the best of luck. I would put a chute on that one, but that kinda defeats the purpose right. That's why it's called Experimental.As far as the splicing here's what I recommend to guys that forgot to buy 2 long tubes when they ordered their wood. Figure out what lengths you need to put a BUTT splice BETWEEN the gear plates at Sta 3, you are going to weld all around each tube to each plate so you really don't need either an inside or outside splice on the 5/8 longeron. Plus the vertical tube that comes off the longeron between the plates will saddle the longeron and be welded all around it as well. The Cross tube does the same so we are talking a non-issue John B
