Cheers, this is the first vacform I've done, so going at it a bit blind. I've just finished sanding the fuselage, and have dry fitted it. I need to clean up the resin wings, but I'm concerned about the stress on the join without any support. Do I need to use a different glue to bond them together? Any advice much appreciated
What I would do is add some thick plasticard ribs to reinforce the inside of each vac wing root. Once these have been attached I would lightly spot-tack on one of the resin wings to its wing root with superglue. Drill two holes from inside the wing root (one at 20% distance from the wing leading edge and one at 70% distance) so the drill goes through the resin wing airfoil section and then snap off the wing from the wing root. Put two brass or aluminium rods or tubes through the holes in the wing root and line them up paralell to the other wing root and drill holes in the other wing root. You can then lightly tack on the other wing to the root you just drilled and then drill through the airfoil section of the other resin wing. This gives you alignment for the spars and wings so you can fit them later in your build sequence. Once your fuselage is finished you will be able to insert your two rod/tube wing spars through the pre-drilled wing root sections to which you will be able to attach the wings in perfect alignment.
By the looks of it your F-27 is 1-144 scale so the loading weight is not going to be too great, so you'll be able to gauge what thickness of spar you need.
Wow great job on awful vacform (very brave) and wow what a great scheme that brings back memories of my late teens when i was gliding at NZPP and this aircraft was always there (possibly based there) such a great scheme.