 The ailerons were able to droop, providing a full-span jet flap.The H.126 was powered by a single Bristol Orpheus turbojet engine.All engine thrust was ducted through to a vertical distribution manifold, the top of which featured three ducts on each side leading into the wing to reach a total of eight fishtails, from which exhaust would be directed over the full span of both the flaps and ailerons; one of the wing ducts also supplies the roll-jet nozzle at the wing tip.