Long-EZ Roncz canard question

[gullikson]

Hello all,

I'm starting a Roncz canard for my Long-EZ and I'm stuck on the positioning of the 3" x 1.2" inserts for the lift tabs.  The GU canard plans, pg 10-2, show the inserts centered at BL 8 and, what appears to be the c/l of the shear web face.  The GU canard also shows this "centerline" is actually WL 19.4.
Now on the Roncz plans the WL is 19.8 which, if this is also the c/l of the insert holes, seems pretty low on the shear web face with little edge distance from edge of insert to lower shear web face radius.
All that to ask; is the c/l of the insert holes supposed to be at WL 19.8?  Please advise.

Thanks in advance.
Greg

[LongEZDaveA]

It's been a long time since I did this step.  I glanced at the plans and don't see anything to lead me to believe that you should concern yourself with the waterline.  I would center the inserts vertically between the two spar cap faces and as you mentioned, place their center line horizontally at BL 8.0.  The drawing on page C-1, which Burt mentions is an accurate full scale drawing, shows the inserts centered between the spar caps with no WL reference (except the one above at 21..  Build on.....

[gullikson]

Dave,

Thanks for the response.  I guess sometimes things are simpler than they seem.  CP changes to the GU canard emphasized removing the term centerline and replacing it with WL 19.4.  This got me questioning the positioning.   The cross section of the canard and lift tab shown on C1 is how I assumed the tab location should be but the centerline change in the original plans left me wondering if my assumption was correct.  Thanks again.