Harry Schoaf

THE method was developed to make possible the production of identical built-up ribs using a minimum amount of time and effort. The object is to produce a rib unit (Fig. 1) complete with all truss sheets glued in place so that the finished ribs may be cut off. Naturally, some preliminary work is necessary in order to produce the rib unit. However, once accomplished, making ribs of that particular airfoil is rapid and very gratifying. The author has used this method for several years, mostly on flying scales, and has found the strength to weight ratio unequaled. Once the ribs are in place on the spars the appearance is striking, and almost prevents one from covering the wing.