The first wing has now been started and is going together very quickly once you have pre-joined the 2 main spar webbing parts (I fitted a 1/32" ply doubler over the rear of the join area) and spliced up some spruce strip for the upper main & rear spars.
Starting with a few ribs at either end of the main webbing, I glued the ribs (R5 outwards) onto the web & initially held them in place using a dry fitted rear spar. (The notched ply web and bottom building tabs ease this process.)
I then glued the upper 1/4" square main & rear spars into place to firmly anchor all the ribs - note that the spars need to be pressed right down as the remaining space above will be filled with balsa later).
The remaining root ribs can be added by fitting them into the above two spars, spacing apart using the separate web pieces - not forgetting to fit the joiner tube hole doublers to R1 & R4, otherwise the rib positions will not work out correctly above the plan
The aileron spar AS1 can also be fitted to the rear of the outer ribs - not forgetting to add the aileron servo plate at the same time.
Note that the aileron spar and the main (MSE) & rear (RSE) extension spars need to be fitted so that the upper surface slopes downwards towards the tip - note that some of the plan sections appear to show some tip parts upside down, but that is because of the direction the section view is made. The check is that R14 should slot in from the top.
The photos also show a couple of the spruce strip cross braces which can be slid into place via slots cut in the ribs. Note that these need to be firmly bonded to the ribs and the spar tops to add torsional stiffness. Web plates are added between top & bottom cross bracing strips later.
![Wing Structure1.jpg (140.6 KiB) Viewed 3388 times Initial wing structure](./download/file.php?id=13999&t=1&sid=f96618d0f00aa788ee08bf7c6859469d)
- Initial wing structure
![Aileron servo.jpg (118.9 KiB) Viewed 3388 times Aileron servo plate](./download/file.php?id=14000&t=1&sid=f96618d0f00aa788ee08bf7c6859469d)
- Aileron servo plate
![Wing root area.jpg (221.9 KiB) Viewed 3388 times Wing root area](./download/file.php?id=14001&t=1&sid=f96618d0f00aa788ee08bf7c6859469d)
- Wing root area
![Wing tip.jpg (103.8 KiB) Viewed 3388 times Wing tip area](./download/file.php?id=14002&t=1&sid=f96618d0f00aa788ee08bf7c6859469d)
- Wing tip area