G. Desmet et al., MEASUREMENTS OF ATMOSPHERIC POLLUTANTS USING HELICOPTERS - EVALUATIONOF THE POSSIBLE CONTAMINATION OF THE SAMPLE AIR BY TURBINE EXHAUSTS, Atmospheric environment, 29(18), 1995, pp. 2547-2552
A systematic study has shown that under normal flight conditions and w
ith a forward facing sample air intake, the measurements of atmospheri
c pollutants (ozone, NOx, SO2, dust) on board helicopters are not subj
ect to contamination by the turbine exhaust.