I agree with the structural consideration re needing a rib, but I'd
like
to add an observation on lateral stiffness. There are still 5
remaining
hinges that will flex easily, so stiffening one (via double plates and
a
Tufnol block) has a finite effect.
This all points out the importance of adhering to all the measurements
and gaps called for. Seems to me that, whatever aerodynamic loads can
push the flap outboard, it better strike wing structure (and not foul
the aileron) and still have sufficient pin engagement. IOW, do not
rely
on lateral stiffness.
Regards,
Fred Fillinger, A063, N3EU
> With the existing arrangement all the lugs in the wing are built into two
> ply glass lay-ups ,Your suggestion is fair except that a method of attaching
> the single lug to the middle of the two ribs in the trailing edge of the
> wing would need another rib ? Furthermore the tufnol block provides Outboard
> stiffness ensuring the flap drive pin doesn't disengage.
> Regards
> Bob H G-PTAG
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