just did one , 1/8 steel rod , doubled in center 1 1/2 in. , brass washer Ea End .
5/32 brass tube in 1/8 ply ea side ( top & bottom ), second 1/8 ply lam outside mounts , tube bearings are 3/8 ,
center rod ( pivot 0 is full depth of wing.
Swings Free, No Slack . Brass on steel is maybe self lubing , buts vasilined after passivating ( Boiling in B Soda Sol'n .)
Was conveniant for this design , long 1/8 ply spar joiners - undercarage mount mounts - belcrank mounts ; Doublers
to ease any doubts, just little tube braces really .
The cranks drilled 1/8 x 2 at pivot , secondary 1/8 rod was filed flat to mate my crossed intersection ' 8 ' hole .
--------------------------------------------------------------------------------------------------------------------------------------
Been Figuring a outside take off / arm above / outside wing .
a z bend 1/8 or 5/32 wire pivot , second shorter wire as binding so cant screw loose ( control Failure ) .
Think it'd be a bit of a swine to assemble - sequential during construction - with instalation of the mounts .
It'd get the pushrod perpendicular to the flap horns , at neutral , and the pushrod pretty much horizontal on this ship .
-------------------------------------------------------------------------------------------------------------------------------------------
think Brass on Carbon would be better , self polishing . Alumn to soft , gall And Self Erode .
Wotter you gunna use for GLUE in there ? The Bellcranks glued to the toob ?? .