One purpose of the law is to assure that the airlines do not face new local restrictions on these quieter aircraft after they are bought.

Also, the limit will be eliminated if the tour operators switch to new, quieter aircraft, which many have already ordered.

"We all want more quiet aircraft," he said, "but we are not going to let Europe set the standards unilaterally."

The small Solo engines make the Flyer a very quiet aircraft in flight.

Curfews and use of quieter aircraft or newer models would improve life for people experiencing noise even before 1987, she said.

Aircraft manufacturers should be put under considerable pressure to build cleaner and quieter aircraft.

It is, obviously, also the intention to promote the use of quieter aircraft.

In the final analysis, we should realise that the aim of the noise charges is to promote quieter aircraft.

The strategy's objective is that quieter aircraft must be brought into service and noise charges must become more effective in environmental terms.

During the night, when other noises are minimal and people are trying to sleep, even the quietest aircraft produce a disturbing amount of noise.