If the Arrow was put into service regardless of the cost, could it have had a similar history and similar variants as the F-4 Phantom II? Both were designed as twin engined, two-seater interceptors with very powerful engines. Both were initially built without guns or gunsights. Differences: the Arrow used internal bays and used computer aided controls. The Arrow's proposed Iroquois engines gave the plane a thrust:weight ratio greater than 1:1. Any comments? Suggestions?