Wingspan: ~220cm
Lenght: 120cm
Overall Weight: ~1200 Gr.
Airfoil: HN 785 mod.
CG: 60mm from leading edge
Having a Question, a Suggestion or Issues?
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Please send me Photos of your Sterna if you build one, so i can load it to the wall of fame.
firefly at lukaslacher.ch
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Connect the bottomsheets 1-3 and glue them together. When lasering the bottomsheets, it is important not to entirely cut the ailrons and flaps. This must be a preforation line only!!
Insert the ribs and lock them by gently pushing them towards the leading edge. Glue with thin CA, but make sure you don't fill the gaps for the spars.
Push the lower Carbon Strip (5mm x 1mm) through the wing and glue it with thin CA. Then apply the Plywood Spar Parts and firmly glue them.
When the main Spar has dried, you can add all other parts as shown in the plan.
finally apply the wing tips and carefully sand the wing smooth. be gentle sanding the leading edge it only needs a few strokes, since i hate sanding with a passion. :D
Unfortunately i forgot to document how to build the fuse. It would be nice if someone can send me pictures of the process so i can put them here.
Basically you build a cage first using the plywood as shown in the picture (Falco Fuse). Use the Carbon Tail Boom as a jig. Afterwards you can apply the Balsa Sidewalls and Bottomsheet.
This Picture shows the Tail Section with Carbon Strips (3mm x 0.2mm) as reinforcement in the gap and at the trailing edge.
