'Flying Laboratory' at the Big Air Show Sleek lines of the Avro Ashton, four-jet experimental aircraft, seen at Farnborough Aerodrome, Hampshire, to-day (Tuesday) - dress rehearsal and technicians day of the 11th Flying Display and Exhibition of the Society of British-Aircraft Constructors, which opens tomorrow. Six Ashtons have been ordered by the Ministry of Supply for research into the characteristic of high-altitude jet flight. A version of the Tudor airliner, it is one of 25 new aircraft am