This SAE Aerospace Recommended Practice (ARP) provides definitions and background information regarding the physical performance and testing of electrohydraulic flow control and pressure control servovalves. This ARP also provides extensive guidance for the preparation of procurement specifications and for functional testing.
NOTE: An example of a procurement specification is provided as Appendix A.
The document has been revised to:
Clarify definition of terms and align them with the illustrations given in figures.
Update document references.
Correct multiple typographical errors introduced during previous revisions.
Include some technical updates.
Flight control actuators
Fluid power systems
Also known as: SAE ARP 490
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