Avro 557 Ava N171
One of Roy Chadwick's first designs was the
Avro 556 torpedo bomber. The 557 was a
bomber variant of this aircraft, and named "Ava" (at least by
Avro). Although designed
1923, it was not until three years later that the prototypes of these
machines took to the air.
When the torpedo
bomber project was cancelled the model 557 also appeared to have died
death. Two 557s were built. The Mk.I was of wooden
construction with rounded
(above) while the Mk.II was all metal with square tips (N172). .