Finished painting the Adventurer wings today, all going well I will get them fitted during the coming week. Next step, (once the trestles are freed up) is to piant the flaps, Ailerons, tank panels and all the funny little inspection covers!
The fabric on the wings is rivetted on to the cap strips using wide flange rivets and aluminium washers over the reinforcing tapes. The tail feathers however are rib stitched as the rib extrusions are a lot narrower. I used the "Polyfibre" manual's modified Seine knot, which puts the knot and the running stitch inside the surface, which makes a neater finish than the old style knot in AC43. With the number of fastenings required on the wing it would have been a major effort to stitch it all! As the Wing ribs are extruded channel its very practical to use the rivet technique instead (this is a technique approved for certificated aircraft IAW the PolyFiber Manual). On some wooden aircraft with wider rib caps, there is a current trend to rely on the glue and not to stitch, but the bond strength of gluing alone on 1/2" wide Aluminium (even etch primed) is not sufficient. The other advantage of rivetting is that there are no rib lacing cords inside the wing, allowing excellent access for the various control cables.
Sure beats stitching . Far quicker and produces a neater result. Anyone glueing polyfibre to ribs as an alternative to a mechanical bond is asking for trouble IMO. Unfortunately the four wings and all the tailfeathers on my project need to be done the traditional way. A prospect I am not looking forward to. The AOP9 utilised 'stringing wire' which was retained in a slot on the rib flange. Brilliant system, and only took half a day per wing to complete.