Howdy, I have searched the forums on "bushing stock", scoured metal supply, searched aircraft supply, etc., and cannot find 3/8" Bushing Stock referenced on Page 23 of Double Eagle Plans. Aircraft Spruce is nearest with 1015/1020 3/8" OD, 1/4" ID, and .065 wall. But the 1/4" is too big for the 3/16 bolts that will go through the hinge (note to ream to 3/16"). I have thought about 4130 chromoly tubing that is 3/8" OD & .095 wall. The ID is then .185 which can be drilled to .185 or 3/16". But, I cannot seem to tell 1015/1020 and 4130 are "interchangeable". What did any of you guys use? And, please, where did you find it?? Any assistance is appreciated.rgc
And, most important, thanks, I suspected that 4130 would be good for "bushing stock" as per Leonard's plans, but I had just never heard that term before and didn't really understand what that term meant. In fact on the plans it just says just "Bushing" which I didn't understand. When I got on Aircraft Spruce and searched bushing, I got the "Bushing Stock" as noted previously which is where I wound up with the 1015/1020 type of metal. I think I was chasing my tail .... rgc
Apologies ... didn't mean to alarm anyone. In some of my research I managed to find, though I don't recall where, the attached drawing on a cub replica (see hinge detail at lower left of drawing). That drawing did show 4130 to be used as hinge material and therefore I was starting down that path.The problem for me is / was that the Double Eagle drawing just said bushing with no reference to any type of metal, just "bushing". I just didn't know what that meant. And, in going straight to Aircraft Spruce for the first search, that is where I saw the 1015/1020 reference. The mystery began there. Now that I see a production aircraft used 4130 for hinges, makes my believe that Leonard was thinking the same. Regardless, if the right choice for certified it seems to be a good call for Experimental in this specific instance.