motodave
Well Known Member
First off I think I'm stressing over this too much and likely build on but here's the question I've posed to Van's and to you.
I recently joined the completed tail cone to the "mid-fuselage". First step is notch the longerons (using the tail deck as a guide) then insert into tail cone and attach the mid section. Done and fine, then attach 770 side skins etc.. I "built" the longerons to spec but noticing a small miss match to the 770 skin.
With everything installed (clecoed) the front edge of the canopy deck (L&R) is 1/8" forward of the downward slope line of 770 side skin BUT right at the 28.25" mark from front edge of longeron per plans (this is the point where the the downward bend/twist begins). The aft end of longerons are short of the 712 tab ends but measure perfectly per plans from aft deck rivet holes. If I proceed to drill the first aftmost hole in the longeron I will still have a edge distance for rivets. Also in current position I will need to trim forward ends of longerons by ~1/4" each (7/32 on L and 6/32 on R) to achieve required 3/4" firewall set back (I think it is normal to trim a small amount).
So the question is 1.) do I disassemble the whole thing, pull the longerons and widen the notches (for the HS attach bars) so they slide in further OR 2.) build on as the 1/8" won't make a difference and BTW the longeron match up really nice with the skin now with minimal fussing.
THANKS in advance!
BTW, heck of time trying to post pictures from Flickr but my album link is below.
I recently joined the completed tail cone to the "mid-fuselage". First step is notch the longerons (using the tail deck as a guide) then insert into tail cone and attach the mid section. Done and fine, then attach 770 side skins etc.. I "built" the longerons to spec but noticing a small miss match to the 770 skin.
With everything installed (clecoed) the front edge of the canopy deck (L&R) is 1/8" forward of the downward slope line of 770 side skin BUT right at the 28.25" mark from front edge of longeron per plans (this is the point where the the downward bend/twist begins). The aft end of longerons are short of the 712 tab ends but measure perfectly per plans from aft deck rivet holes. If I proceed to drill the first aftmost hole in the longeron I will still have a edge distance for rivets. Also in current position I will need to trim forward ends of longerons by ~1/4" each (7/32 on L and 6/32 on R) to achieve required 3/4" firewall set back (I think it is normal to trim a small amount).
So the question is 1.) do I disassemble the whole thing, pull the longerons and widen the notches (for the HS attach bars) so they slide in further OR 2.) build on as the 1/8" won't make a difference and BTW the longeron match up really nice with the skin now with minimal fussing.
THANKS in advance!
BTW, heck of time trying to post pictures from Flickr but my album link is below.
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