This procedure is intended to apply to all pumps downstream of engine inlet. The procedure will be defined in terms of recommended test setups and recommended testing methods. Two methods of determing V/L are provided Method I ?C V/L Meter: When using this method@ the vapor-to-liquid ratio is sensed in a measuring section installed in inlet line upstream of the pump. The vapor-to-liquid ratio is assumed to be the indicated volume flow rate vapor-to-liquid ratio and is read out as V/L on a meter dial. Method II = V/L Calculation: This method assumes that an equilibrium mass flow rate of dissolved air evolves from the flowing air saturated liquid fuel in accordance with Henry's Law for solution of gases in liquids. The volume flow rate vapor-to liquid is then calculated from the mass flows in accordance with Dalton's Law of Partial Pressures@ the Perfect Gas Law and the liquid fuel thermal expansion behavior. The necessary calculations are described in Appendix A PURPOSE This recommended practice defines procedures for testing aircraft engine fuel pumps for the purpose of determining their resistance to deterioration@ during endurance test@ while handling a specified mixture of gas and liquid expressed as a ratio of vapor volume to liquid volume. The procedure recommended herein based on experience gathered by a number of laboratories conducting component qualification tests to MIL-E-5009@ currently MIL-E-5007. It is intended to produce a uniform reproducible steady state test condition for fuel pump cavitation testing as required by various military engine specifications. This test is not intended to establish altitude or climb rate performance of the article tested.
SAE ARP492B-1977 history
2021SAE ARP492C-2021 Aircraft Engine Fuel Pump Cavitation Endurance Test
1994SAE ARP492C-1994 Aircraft Engine Fuel Pump Cavitation Endurance Test
1977SAE ARP492B-1977 Aircraft Engine Fuel Pump Cavitation Endurance Test
1963SAE ARP492A-1963 Aircraft Engine Fuel Pump Cavitation Endurance Test
1957SAE ARP492-1957 AIRCRAFT FUEL PUMP CAVITATION ENDURANCE TEST