rparigoris
Joined: 24 Nov 2009
Posts: 796
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 Posted: Thu Nov 21, 2013 9:47 am Post subject: If is broke, so just fix it |
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Hi Dave
I have studied how I am going to deal with Mod 78. I have short wings rigged already. First thing I am going to do is temporary bond in the tip spar bushings, then drill 1/2" holes for the other bushings. If dihedral is less than 2.4 degrees, so be it, OK down to 2.2 degrees if need be. I am very close on the top inboard. I will then make sure I have at least 1/16" clear on the top inboard, prefer at least 1/8" though. If I really needed to, I think I could perhaps slightly move the tip bushing location. Then I am going to fabricate several perfectly shaped spars out of plywood adjusted so they fit my bird perfectly including the position for spar bushings. They can be installed in fuse and checked for fit. This will turn into my mold. The mold supplied from Europa, well....spar hole locations...dimensions of mold...finish of mold...enough said.
Getting back you your dilemma, perhaps you can create a perfect example of your spar and install it in your bird and see what's happening? You don't have the ability to easily move your lift pins or lift pin sockets, but it is not beyond possible. You may be able you use wood from your mold adding Bondo or other fill to replicate your spar. Try just front of port spar first, if you need more resolution then make it full width (spacer between the two). In your case, it may be necessary to replicate the front and rear lift pins on the spar, then remove and measure to what your wing in (wood or metal with pins in position and get stuck to your replicated spar.
Just to make sure, could it be as easy as you installed the new style lift pin and the shoulder is hitting the front lift pin socket? I think the intention is for the shoulder to make sure the swivel bushing stays in place if it ever got debonded? The straight pin with bonded spacer could do the same thing?
Perhaps some clay to mold around areas you think are contacting?
Perhaps you can remove front lift pin all together and see if you can get things to fit? The front lift pin socket may be the easiest of all to move position? If still can't fit, remove rear lift pin and put front back in?
Report back what you find.
Best of luck.
Ron Parigoris
Doing battle with flap drive to make my XS Mono work with both short and long wings. At 80% feeling of success at moment. Waiting for an order of ball joint swivel bearings to come in to do actual testing on rear push cable mount. If I get a 90% feeling of success after testing, going to order cable. [quote][b]
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