It used a single double box spar with thick laminated wood flanges and three vertical plywood webs.

Its wings are built around a wooden box spar and plywood covered except for fibreglass leading edges.

It was formed around a three box spar of pine and plywood, its cells filled with plastic foam.

The wing uses a single box spar covered in 3/32" plywood leading edge skins.

Schempp-Hirth type airbrakes are fitted at mid-chord, just aft of the box spar at about one third span.

The one piece, low set wing is built around a single box spar, with its leading edge covered in okoumé plywood under an overall fabric covering.

It was built around two spars, with stress bearing plywood skin forward of the rear spar forming a box spar.

The wing has a single box spar with spruce webs and ply caps.

Its high wings are built around a single box spar, with a torsion resisting, plywood covered leading edge.

The wings aft of the single box spar were fabric covered as was the tailplane and fin.