SD-15 Guide For Performance SpecificationsThis document provides guidance information on performance specifications focusing primarily on stating requirements in performance terms and ensuring that sufficient verification means are included in the specification to evaluate conformance. While the focus of this document is on defense specifications developed under DoD 4120.24-M, Defense Standardization Program DSP Policies and Procedures, the principles and techniques can also be applied to program unique performance specifications, performance-based purchase descriptions, commercial item descriptions, or any other type of procurement specification. This guide is intended to supplement the format and content requirements for writing performance specifications found in MIL-STD-961, Defense and Program-Unique Specifications Format and Content.

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Performance Specification Guide SD-15

consider hose response and take-up rate, hose extension capability, drogue stability, and catenary curve. Ventilation analysis for vapor dilution should be conducted for all phases of the mission, including, but not limited to, static or low speed ground operations, high altitude/low air density, and other unique conditions.

Blank 2. Identify the type and scope of aerial refueling flight simulations required to confirm that the air vehicle aerial refueling envelope has been met.

Blank 3. Identify the type and scope of aerial refueling flight demonstrations required to confirm that the air vehicle aerial refueling envelope has been met. Demonstrations should include, but are not limited to, demonstration of tanker flying qualities and receiver handling qualities throughout the altitude, airspeed, and gross weight ranges. Boom controllability and hose and

drogue stability should be assessed throughout the operating envelope including evaluation of the gross weight range of the tanker and receiver. Bow wave effects of various receivers on a boom

or drogue should be evaluated. For hose and drogue systems, catenary curve and hose response should be evaluated. For boom systems, latch and unlatch times must be determined. Demonstrations of receiver engine power availability for tanker closure, including one engine- out power-level evaluations, should be performed when applicable.

Blank 4. Identify the type and scope of aerial refueling flight and ground tests required to confirm that the air vehicle aerial refueling envelope has been met. Tests should include structural load evaluation of the aerial refueling equipment such as probe and boom loads, latch forces of boom systems at all temperatures within the operating envelope and including rigid disconnects. Other tests should be discussed in the Receiver and Tanker Interfaces verification sections of this specification. For rollover type refueling receptacles, flight tests should be conducted to ensure that opening and closing times could be met. Simulated ground tests may be applicable if all flight parameters (e.g., temperature, aero loads, and aircraft structure) can be emulated.

Blank 5. Identify the type and scope of post-flight aerial refueling inspections, if any, that should be conducted relative to ensuring that the aerial refueling envelope requirement has been met. Inspections should include, but are not limited to, fluid leakage, box drainage, and general equipment health including cracks, bends, and unusual wear. Hose and drogue systems should include hose damage and wear and drogue canopy damage.

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