> D. Glenn Arthur Jr. mused: > > > > Jostein wrote: > > > IIRC, the altitude where jumbo jet pollution happens offsets the > > > efficiency. The same amount of exhausts do a lot more damage up there. > > > > Which reminds me ... Are fighters actually much louder than > > jetliners, or is it just that when they pass over my house > > they do so at a much lower altitude than jetliners do?
and John Francis replied: > The former. Military aircraft don't have to meet noise pollution > specifications, and also use inherently noisier engine designs > (because the important metric is raw power, not fuel efficiency). > Depending on where Glenn lives, the answer could also be "both." It would be for me. ER
