Influence of oil service life on selected performance parameters of an aircraft piston engine

This article presents an analysis of the influence oil service life on performance parameters aircraft piston engine lubrication system used in ultralight aircraft. The ageing between changes causes a change its (such as density, viscosity ...). These have strong level protection lubricated components. Currently, aircraft, are carried out according to time schedule - is changed every fixed period (residual life) regardless actual condition. task this test possibility indirect assessment condition based selected operation during normal operation. warm-up speed pre-start procedure and dependence pressure were assumed for analysis. study was conducted rotorcraft Selected first daily flights directly after change, 17, 32, 50, 66 hours analysed. It shown that rate samples analyzed, but may also be due factors other than operating time. In case vs. characteristics, different characteristics time, no specific dependencies found.