The Swedish Army Aviation Company purchased the Grouse II prototype as an advanced trainer .
The Grouse II was unsuccessful in meeting the RAF 's needs , a new version of the Avro 504 , the 504N , also powered by the Lynx engine , being preferred .
The Swedish Army Aviation Company purchased the version   prototype as an advanced trainer .
The Grouse II was unsuccessful in meeting the RAF 's needs , a new version of the Avro 504 , the 504N , also powered by the Lynx engine , being preferred .