Static oil drain-down occurring between the postflight inspection and next flight can fill the N2 oil pump and accessory housing on J57 and TF33 jet engines to a point where it drains overboard on the ramp. This can deplete the oil supply, resulting in launching of aircraft with less than full oil quantity. The purpose of this test was to evaluate a method of turning over an engine with the starter to rotate the gear type oil pumps and scavenge oil back to the tank. For testing the N2 gear-boxes were filled to their maximum capacity with oil. The engines were then motored with the starter for two minutes and checked for residual oil quantities. (DePo)
Scavenging Engine oil pumps for oil service-J57 TF33 series engines
Oelspuelpumpen fuer die Oelversorgung- Flugmotoren der Serien J57 und TF33
US Government Reports ; Jun ; 1-25
1980
25 Seiten
Report
Englisch
LOOP SCAVENGING versus THROUGH SCAVENGING of TWO-STROKE ENGINES
SAE Technical Papers | 1958
|Loop scavenging vs. Through scavenging of two-cycle engines
Engineering Index Backfile | 1957
|Scavenging of two-cycle engines
Engineering Index Backfile | 1933
|Factors influencing scavenging of 2-stroke engines with mixed scavenging
Engineering Index Backfile | 1941
|