Merlin Engine Diagram. If a 3000 main journal bore is desired it can be finished as such. A total re wiring of the aircraft and a new open architecture tactical mission system.
According to spaceflight 101 the chamber pressure is the same but the expansion ratio throat area to end of nozzle area is 7 times larger in the vacuum variant which if correct implies about 27 times the nozzle diameter if the throat is unchanged. He worked with miss schilling of orifice fame. The rolls royce and packard built merlin engine is universally acknowledged as one of the finest piston engines that has ever been manufactured.
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My father raymond leslie kent was a pilot in ww1 and later became chief engineer of su carburettor co. The merlin capability sustainment programme provided 30 mk2s with a redesigned cockpit and aircraft management computer system. In the past 14 years we have acquired numerous inventories filling over twenty. The merlins are gimbaled hydraulically with two pistons per engine.