Avro 504 - Variants

Variants

504: 80 hp (60 kW) Gnome Lambda engine.

Original model

504A:

Modified with smaller ailerons and broader struts. 80 hp (60 kW) Gnome engine.

504B

Version for RNAS with larger fin. 80 hp (60 kw) Gnome or Le Rhône engine.

504C

Single-seat anti-zeppelin aircraft for the RNAS. The 504C was fitted with an extra fuel tank, in place of the observer.

504D

Single-seat anti-zeppelin aircraft for the Royal Flying Corps. Six built.

504E: 100 hp (75 kW) Gnome engine. Ten built.
504F: 75 hp (60 kW) Rolls-Royce Hawk engine. One built.
504G: 80 hp (60 kW) Gnome engine.

504H

Used for catapult trials. 80 hp (60 kW) Gnome engine.

504J

Used as a trainer. 100 hp (75 kW) Gnome or 80 hp (60 kW) Le Rhône engine.

504K

Two-seat training aircraft. The 504K had a universal mount to take different engines. Single-seat fighter conversion used for anti-zeppelin work. Several were assembled in Australia by Australian Aircraft & Engineering. 130 hp (100 kW) Clerget, 100 hp (75 kW) Gnome Monosoupape or 110 hp (80 kW) Le Rhône 9J engines.

504K Mk.II

Hybrid trainer based on 504K fuselage with 504N undercarriage and wings and powered by rotary engine. Built under licence in Mexico as Avro Anahuac.

504L

Floatplane version. 150 hp (112 kW) Bentley BR1, 130 hp (100 kW) Clerget or 110 hp (82 kW) Le Rhône engines.

504M

Three-seat cabin biplane. Only one was ever built. 100 hp (75 kW) Gnome engine.

504N

Two-seat training aircraft. Redesigned postwar trainer for RAF with 160 hp (120 kW) Armstrong Siddeley Lynx engine. 598 built.

504O

Floatplane version of 504N. First aircraft to fly above the Arctic Circle in 1923 Oxford Expedition.

504P

Unbuilt version of the 504N with side-by-side seating.

504Q

Three-seat cabin biplane. The 504Q was built for the Oxford University Arctic Expedition. Only one was ever built. Armstrong Siddeley Lynx engine.

504R Gosport

Reworked trainer with revised, lightweight structure. Five prototypes flown 1926 to 1927 with various engines (100 hp/75 kW Gnome Monosoupape, 100 hp/75 kW) Avro Alpha, 140 hp/104 kW Armstrong Siddeley Genet Major and 150 hp/110 kW) Armstrong Siddeley Mongoose), with the Mongoose chosen for production aircraft. Ten were sold to Argentina, with 100 more built by FMA under licence in Argentina. At least six were exported to Estonia, remaining in service until 1940, and an unknown number to Peru.