Assembly Details


 The wing spar brackets on the fuselage must be 30″ on center to agree with the spar attachment points on the wings.  This has to be a precise fit.  Unfortunately my welding experience or lack thereof caused me to not compensate for all the distortion that can happen during a weld and thus I ended up with a fractional difference between the spar brackets.  Fortunately Morgan Williams had an easy solution using a series of thin precision made aluminum plates stacked between the aluminum spars and the steel attach brackets accommodated the measurement difference to thus make a precise fit.  

The Northstar wing like the standard Super Cub wing uses the forward wing strut to carry the aileron cable up to the wing. I wanted the aileron cable concealed and run inside the leading edge zone of the wing.  The lower right photo shows a preliminary rigging set-up of the proposed forward pulley location and it’s necessary alignment of the pulley behind the spar. The carry through hole in the spar had to be kept  small and avoid interfering with the adjacent hard riveted reinforcement plate.

The lower left photo shows the aileron hinge bracket located at the rear wing strut attach point and it’s alignment with the aluminum wing compression strut. Also note that there is an additional steel tube strut providing additional triangulation strength where the wing struts will be attached. The hinge bracket, compression struts and the rear wing strut bracket all come together in a collective assembly of precision made aluminum and steel plates all held firmly together with AN stop nut hardware.