[79FT]: Building Things

Aileron-To-Rib - Alignment

Fixed mis-alignment in ailerons

On: May 21, 2014
In: [Skybolt] Wings
Tags: CAD, lower wings, ailerons

Today, got only about an hour and a half for CADing. Re-opened my Lower Wing model, 50% thru or so, and started remembering things and checking things around.

I was right at a point when I hung the ailerons on the wings, and this time was re-checking the alignment again, only to find that they were off! Looked like they were lower than the rest of the wing ribs, by about 1/16th. Clearly visible on the screenshot below.

Black lines are aileron outline, orange lines are wing ribs

Black lines are aileron outline, orange lines are wing ribs

Started digging around and re-checking the hinges, holes, etc, with plans. The 'spar' side hinges are the most complex ones, and they were fine.. When checking the aileron assembly though, noticed this, which struck me as odd (and a bit illogical):

Aileron hinge sticking a bit 'above' the spar

Aileron hinge sticking a bit 'above' the spar

Notice it sticking up? 3/32nds! Close to 1/16th. Arguably, there will be the filler there, but it still seems illogical (yes, mr Spock? :) ).

Anyways, moving the spar attach holes on the hinge up by 1/16ths (plans call for 3/8ths between the top of the hinge and the top hole center), so 5/16ths it is. That moved the whole aileron up on the hinge, and therefore, relative to the wing, and voila - a perfect match!



Yay! A perfect match.

Now, I know that in reality I will be drilling holes in spars in place based on the pilots in the hinges (or the other way around, hinges based on holes in spars (damn.. Im yet to decide.. :) ); but I'd rather start 'clean'.

Any pilot who relies on a terminal forecast can be sold the Brooklyn (or London) Bridge. If he relies on winds-aloft reports he can be sold Niagara Falls (or The Tower of London).

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