The improved servo valve 20 is broadly divided into a body 21 having a body axis 21 having an axis of extension y-y and a body 43 defining a cylinder 43 having an axis x-x substantially perpendicular to the body axis; A valve spool (44) movably mounted in the cylinder and configured to move off-null in either direction along the cylinder axis to selectively measure fluid flow between the plurality of ports formed between the spool and the cylinder; A rotor 58 mounted on the body such that it can rotate about a body axis; A motor 69 acting between the body and the rotor, the motor 69 being selectively operable to rotate the rotor in a required angular orientation relative to the body; And a quill-shaped conveying member 64 acting between the rotor and the valve spool.;
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