hotrod180
FRIEND
Port Townsend, WA
I helped a friend of mine hang & rig the wings on his SC restoration project the other day.
Here's how he did it:
levelled the fuselage at the wing attach fittings.
Hung the wings.
Re-levelled at the wing butt rib (tail needed to be lowered a bit).
Installed front struts & adjusted for 3-1/8" dihedral.
Installed aft struts f& adjusted for 3/8" washout at the end rib.
I knew from experience that the TCDS calls out for plumb-bobbing down to a prick-punch mark for leveling:
http://rgl.faa.gov/Regulatory_and_Guidance_Library/rgMakeModel.nsf/0/ab203ab0e89895af862572090071f7cd/$FILE/1A2.pdf
He didn't do this, nor did he check to see that the (stock gear) MLG axle was +2" (aft) of the leading edge datum.
This page from Atlee Dodge also calls out an alternative means of levelling the airplane:
http://www.fadodge.com/fad_pdfs/Cor...ub.pdf?phpMyAdmin=EsjPx8hgioQlsa8ztqFncHAgdU4
Didn't do any of that either- just levelled the butt rib.
I'm curious if the butt rib is indeed also level when the airplane is levelled per TCDS,
neither the TCDS or the rigging procedures page from Dodge mentions that.
Here's how he did it:
levelled the fuselage at the wing attach fittings.
Hung the wings.
Re-levelled at the wing butt rib (tail needed to be lowered a bit).
Installed front struts & adjusted for 3-1/8" dihedral.
Installed aft struts f& adjusted for 3/8" washout at the end rib.
I knew from experience that the TCDS calls out for plumb-bobbing down to a prick-punch mark for leveling:
http://rgl.faa.gov/Regulatory_and_Guidance_Library/rgMakeModel.nsf/0/ab203ab0e89895af862572090071f7cd/$FILE/1A2.pdf
He didn't do this, nor did he check to see that the (stock gear) MLG axle was +2" (aft) of the leading edge datum.
This page from Atlee Dodge also calls out an alternative means of levelling the airplane:
http://www.fadodge.com/fad_pdfs/Cor...ub.pdf?phpMyAdmin=EsjPx8hgioQlsa8ztqFncHAgdU4
Didn't do any of that either- just levelled the butt rib.
I'm curious if the butt rib is indeed also level when the airplane is levelled per TCDS,
neither the TCDS or the rigging procedures page from Dodge mentions that.