THE AVRO AEROPLANE Type 504 N is a new edition of the world-famous . Type 504 K,' known as the standard training aeroplane of the British Royal Air Force, and the standard training machine of many Governments in different parts of the world.

A number of new features and constructional improvements have been introduced, some of which are briefly summarised below :1.The inclusion of the Siddeley-Lynx Engine in place of a rotary engine in the installation of which particular care has been taken to prevent fire and to promote cleanliness in the fuselage.
2. A new and practically unbreakable Oleo Compression rubber Undercarriage.
3. Adjustable Tail Plane arranged for dual operation by lever.
4. Altered Centre Section and Wing Roots to improve upward visibility.
5. New shape ailerons to lighten and harmonise the lateral control with the elevator and rudder controls.
6. New form of Gravity Tank of increased capacity.
7. Numerous minor constructional improvements.

The various improvements still further increase the usefulness of this excellent machine, which is used so widely both for training and commercial purposes.