Performance Specification Guide SD-15
each receiver air vehicle, e.g., 1-1C-1-35 is for the C-17). Aerial refueling procedures for the U.S. Navy and USMC receivers are provided in the NATOPS flight manual for each air vehicle.
NATO STANAG 3971 (ATP 56) contains a point of contact (POC) list for current allied tankers and receivers. When aerial refueling support is to be provided to, or obtained from, allied air vehicles, the POC should be contacted to determine if any unique changes/exceptions to the aerial refueling procedures in the document are required to be compatible with their air vehicles. An allied country may have agreed to the STANAG with reservations or concurred with the document for future air vehicles but may have taken exception for existing air vehicles at the time of coordination.
Receiver air vehicles should not require the tanker aircrew or aerial refueling subsystem to adopt special procedures. For example, the number of tanker aerial refueling pumps being used to transfer fuel should remain constant during the aerial refueling process. In the past, some receivers have required the tanker to limit the number of pumps used to initially transfer the fuel due to fuel pressure transients. Once a steady-state flow condition was obtained, the tanker was then able to increase the number of aerial refueling pumps used to transfer the fuel. Similarly, requiring the tanker to reduce the number of aerial refueling pumps being used near the end of the fuel transfer process to alleviate fuel surge pressures should be avoided.
4.1.1.1.1 Aerial refueling envelope verification
Requirement Element(s) |
Measurand* |
SRR/SFR |
PDR |
CDR |
FFR |
SVR |
Air vehicle is capable of aerial refueling operations throughout the specified envelope |
(1) |
A |
A |
A,S |
A,S,D,T,I |
*Number in parentheses in the Measurand column refers to numbered blank in the requirement.
A = Analysis
D = Demonstration
I = Inspection
S = Simulation
T = Test
VERIFICATION DISCUSSION (4.1.1.1.1)
Verification of the requirements for tanker and receiver aerial refueling operations is adequately covered by verification paragraphs for 3.4.6.2.1 Receiver interfaces and 3.4.6.2.2 Tanker interfaces. The following verification discussion is limited to the approach for verifying 3.1.1.1.1
Aerial refueling envelope. Realizing the verification for 3.1.1.1 Flight envelope will precede
3.1.1.1.1 Aerial refueling envelope verification, the flight envelope precedent-setting requirements and verifications will become baselines for the ensuing aerial refueling envelope verifications. Therefore, any refueling features or characteristics that have not been inspected, analyzed, simulated, tested or demonstrated during the expanding verification of 3.1.1.1 Flight envelope should be conducted. This approach is intended to minimize or eliminate verification duplication of equivalent flight envelope characteristics. The objective of 3.1.1.1.1 Aerial refueling envelope verification is ultimately to verify the tanker and receiver air vehicles have a similar airspeed and altitude envelope within which they can successfully operate their aerial
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