 The base of the manifold had an additional bifurcated duct that ran aft through either side of the fuselage, providing additional thrust to supplement the fishtails in the wing; these two jet nozzles could be furnished with pilot-controlled spoilers.A further duct from the manifold supplies the pitch and yaw control nozzles present in the tail unit, as well as another duct for a pitch-trim nozzle.The extensive ducting necessitated careful insulation and heat-shielding to safely contain the hot gasses; despite this, traditional lightweight alloys were used extensively across the main structure, save for a few critical points.