Another file says the aircraft's commercial service has got 'a little quieter' since 1975 Flight Endurance Flying Programme but adds, 'Nevertheless, 21 of its first 35 departures (60%) exceeded the monitoring limit of 110
PNdB. Nine flights (25.7%) registered over 112
PNdB.'
At the same time, the airport says it is introducing its own voluntary night noise limit of 100
PNdb -- in line with government proposals for reducing noise levels at designated airports -- with effect from 1 November.
The viscosity in the MCPE-HDPE blend followed the rule of mixtures, whereas that of MCPE-TerPP showed positive-negative deviation blending (
PNDB) from the log-additive rule.