flaperon hinges

[ken nougaret]

I started working on the assembly of my flaperons, ss7. I measured the distance between the most outboard hinge and the most inboard hinge on the flaperon. then I measured the distance between ribs #1 & #9. I need to bring my inboard hinge on the flaperon inward 1/2". I suppose this discrepancy is due to the discresionary placement of the #1 rib. does anyone see a problem with cutting off 1/2" of the inboard edge of the flaperon (not spar) and moving the flaperon end rib and hinge inward?
thanks, ken

[HighWing]

Ken,
If you measured between the hinge tabs, you should measure between the mid points of the respective ribs as the hinge tab will bisect the rib width. Before cutting, I would have someone help you position the flaperons and actually see where the tabs are relative to the center of the ribs.

I don't understand your comment regarding the discretionary placement of rib #1. My understanding is that all wing ribs are positioned by design and the butt rib is the discretionary one and is positioned after wing rigging to close the gap between the #1 rib and the fuselage (skylight).

[BobRS]

I agree that you should find someone to help you mount the flaperons on to the wing ribs. We had some very minor left/right centering of the hinges on the ribs 1/16" to <1/8" and absolutely no triming was required. Here is an image of Rib#1 adjacent to the butt rib and inboard flaperon hinge Cleco'd in place.

BobRS
SS7
N104Y

[jdmcbean]

Ken
I am out of town on business.. Please give me a call next week. There are other options but I need to know a little more.

[ken nougaret]

thanks for the responses. I looked back through the manual and found that the figure for installing the #1 rib shows a distance of 35.5" between rib 1 and 3, and I have 35". oops! john I will be calling you.
ken

[HighWing]

Ken,
Your explanation clarifies the problem. In the past, it was not unheard of that factory built wings would arrive with one or more ribs slightly out of true. Those builders removed the hysol or in the old days, the 3M "Structural Adhesive" using a heat gun and a plastic scraper, Then repositioned and reglued the rib(s) in the correct location (or alignment). I think this would be much simpler than cutting the flaperon. I think there are threads related to removing the Hysol.