They were fast, noisy aircraft, but our mystery planes move very slowly and in complete silence.

No touch and go circuits by excessively noisy aircraft.

This had to be the noisiest aircraft in the air force.

El Oso was staring directly into the night, a black hole in the aft of a noisy aircraft.

DOC is therefore encouraging the use of larger and less noisy aircraft.

The 727 is a very noisy aircraft, so some 727s have been given hush kits to make them quieter.

The General and his aide rode in silence-all their talking had been done on the noisy aircraft where listening devices could not possibly have worked.

It was also heavily insulated - the C-i4i is a noisy aircraft, especially aft.

Residents also say that they are awakened in the middle of the night by air cargo flights, which usually use older, noisier aircraft.

The first measure that should be taken is to withdraw the noisiest aircraft.