hmmmm, the webbing (near the root) is marvellously unclear. The combination of the part listings, the exploded diagram (the german booklet), the photographs of actual wings (german booklet) and the plans of the wings themselves are all inconsistent !
I think what they suggest is
rib____ ___________________63(root)___64_____65____66_____ 67_____68_______69_______70______
Main spar front__________________ply_____ ply_____ply____ ply____ ply_____balsa___balsa_______ balsa from here
Main spar rear__________________ply_____ ply_____ ply____ ply____ ply______ -_____ balsa________none from here
part no.________________________98_____ 99_____100____100____100_____ _101____101_________ 101
Aux spar front_________________balsa_____balsa____?_______? _____ ?__ ____-_______ END aux spar
Aux spar rear___________________-_________ -____ balsa___ balsa__balsa__ balsa______ END aux spar
Part no._______________________101______101_____101____ 101____101____101
(darn all my nice layout disappeared [spaces removed] so redid with underscores - hope it makes sense
ply 1mm
balsa 2mm
Where I have ? written, the plans actually show what looks like a web component, although its drawn slightly thinner than the ply
for the main spar and it's not numbered ! The exploded diagram appears not to include it, although they are a bit hard to
negotiate. The wing photo (page 17) apparently shows no web there either (but does show webbing to the rear of the first two
gaps which otherwise the plans indicate to have no web!).
The table of parts also only lists 98x1 per wing (there are two). It lists 99x2 (ok) and 100x6 (ok) and 101x31(which is what
you get with the above layout where the ? are in fact missing, or at least not balsa part 101!
SO I think I conclude no webbing is required at the ? locations.
It probably does not matter much if I add extra ones. I have so much extra weight with spoilers
and ailerons already. I'm also adding a bit of extra support around the rear tube.
The fabled Graupner plans are failing me somewhat here ....
cheers
Neil
I think what they suggest is
rib____ ___________________63(root)___64_____65____66_____ 67_____68_______69_______70______
Main spar front__________________ply_____ ply_____ply____ ply____ ply_____balsa___balsa_______ balsa from here
Main spar rear__________________ply_____ ply_____ ply____ ply____ ply______ -_____ balsa________none from here
part no.________________________98_____ 99_____100____100____100_____ _101____101_________ 101
Aux spar front_________________balsa_____balsa____?_______? _____ ?__ ____-_______ END aux spar
Aux spar rear___________________-_________ -____ balsa___ balsa__balsa__ balsa______ END aux spar
Part no._______________________101______101_____101____ 101____101____101
(darn all my nice layout disappeared [spaces removed] so redid with underscores - hope it makes sense
ply 1mm
balsa 2mm
Where I have ? written, the plans actually show what looks like a web component, although its drawn slightly thinner than the ply
for the main spar and it's not numbered ! The exploded diagram appears not to include it, although they are a bit hard to
negotiate. The wing photo (page 17) apparently shows no web there either (but does show webbing to the rear of the first two
gaps which otherwise the plans indicate to have no web!).
The table of parts also only lists 98x1 per wing (there are two). It lists 99x2 (ok) and 100x6 (ok) and 101x31(which is what
you get with the above layout where the ? are in fact missing, or at least not balsa part 101!
SO I think I conclude no webbing is required at the ? locations.
It probably does not matter much if I add extra ones. I have so much extra weight with spoilers
and ailerons already. I'm also adding a bit of extra support around the rear tube.
The fabled Graupner plans are failing me somewhat here ....
cheers
Neil
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