402 Alex Goodman 
(a) Top view (b) End view 
Fig. 14. Phase-changer and synchronous switch 
pulley-Gilmore belt system. The slider crank mechanism used in this case has an eccen- 
tricity of 0.125 inches and a connecting rod length of 5.000 inches; or a length of connecting 
rod to eccentricity of 40.0. The sinusoidal motion produced by the slider crank mechanism 
is transmitted to a 1.0-inch-diameter push-rod, shown in Fig. 15b, which is guided by linear 
bearings attached to the aft strut. The end of the push-rod is attached to the modified roll 
gage by means of the 3.000-inch crank arm assembly shown in Fig. 15c. The maximum am- 
plitude of the roll oscillation is therefore, +2.38 degrees 
