The aircraft's two-bay biplane wings folded rearwards for storage.
It had a slender hull on which was mounted a biplane wing and a conventional braced tailplane.
The MB-4's three-bay biplane wings were all new, with ailerons on the upper wing.
Some biplane wings are braced with struts forming a Warren truss.
A set of biplane wings were therefore quickly designed and fitted to Texas Wildcat.
The biplane wings were of equal span and featured two N-type struts on each side.
The glider design uses a higher aspect ratio monoplane wing in place of the 890's biplane wing.
The biplane wings were built without dihedral.
The pilot was seated just ahead of the biplane wings.
Fitted with an aircraft hangar, it was used to carry up to six Shorts whose biplane wings folded back to reduce its carrying space.