c~ — mC iiniiinasiaaeomaen ~20~ reactor has about equal promise to be ready first as a workable engine. My only apprehension in this regard is the lag in the efforts to integrate this reactor with engine and airframe, It seems to me that as far as the aircraft reactor is concerned, the circulating fuel reactor appears as promising as en mei et Se ee, the direct cycle reactor. "Since apparentlywe differ sincerely in our evaluation of the promise of these two types of reactors for airplanes, it seems to me best if we admit our difference of opinion and state it clearly," . we co erncaerte. TTT eneee Ge TE) oonre