Exhaust emissions from the PZL W-3 Sokol helicopter based on the measurements of the concentrations of exhaust components in the exhaust gases during a pre-flight test

This paper presents the results of the tests on the exhaust emissions from a turboprop engine used for the propulsion of PZL W-3 Sokol helicopter. The tests were conducted in pre-flight conditions. The paper presents the test results and their analysis that enabled the determining of the values of the brake-specific emissions at selected load points. The load values were determined based on the courses of the parameters recorded by an on-board flight recorder during the pre-flight test. The obtained values of the brake-specific emissions as assigned to the engine load conditions were used for the evaluation of the emissions of the helicopter under actual operating conditions. The load conditions of the powertrain were determined based on the analysis of the operating data as obtained from several archival flight records. The analysis enabled an obtainment of the values of the exhaust emissions generated during the actual operating conditions of the helicopter.