Nederlandse Modelbouw en Luchtvaartsite

Dutch Modelling and Aviation

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In Memoriam

Klaas Willem Jonker
(Wilko)
† April 30, 2018

On Monday 30 April 2018, Wilko Jonker died after a long illness at the age of 58. He leaves behind a wife and two children. The Dutch military aviation and plastic modeling were his hobby and on this website he shared all the knowledge he has collected over the years. His hobby has been able to distract him from the persistent disease in his body until the last week of his life. The contacts with other hobbyists were a major support for him.

This website will be maintained by different people for as long as possible, so that other enthusiasts can continue to benefit from extensive content.

History

The AVRO 504, a trainer, first flew in 1913. It was a development of the AVRO 500, equipped with a Gnome Monosoupape rotating engine rated 80 hp.
Several examples were obtained by the RFC and the RNAS just before the war.
The first aircraft shot happens to be an AVRO 504.
The RNAS used four aircraft to bomb the Zeppelin factories at Friedrichshafen.

As the AVRO 504 was not suited for front service, the type was used in large numbers as trainers with the designation AVRO 504J and 504K.
They were equipped with different engines, depending largely upon availability of the engine. At the end of the war over 8900 examples were built.

During the winter 1917/1918 several AVRO 504J/Ks were converted to a single seat aircraft and used by the Home Defence.
These fighters were equipped with one Lewis machine gun mounted on the upper wing and with an 100 hp Gnome or Le-Rhone engine.
About 270 aircraft were converted, at the end of the war about 220 aircraft were remaining.

After the war the type was used by the RAF for quit a long period as standard trainer. Large numbers surplus aircraft were sold for both civil as military use.
In 1925 an improved version was released, equipped with an Armstrong-Siddeley Lynx radial engine, designated AVRO 504N. 592 aircraft were built of this type between 1925 and 1932. In 1933 is was succeeded by the AVRO Tudor.

Versions

AVRO 504:
The original design with one Gnome engine rated 80 hp.
AVRO 504A:
Improved version with smaller ailerons and broader styles and one Gnome engine rated 80 hp.
AVRO504B:
Version for the RNAS with enlarged met larger fins and one Gnome or LeRhone engine rated 80 hp.
AVRO 504C:
A single seat fighter for the RNAS, used for anti-zeppelin purposes. It was equipped with an extra fuel tank.
AVRO 504D:
A single seat anti-zeppelin aircraft for the RFC.
AVRO 504E:
Version with one Gnome engine rated 100 hp.
AVRO 504F:
Test aircraft equipped with a Rolls Royce Hawk engine rated 75 hp.
AVRO 504G:
Version with a Gnome engine rated 80 hp.
AVRO 504H:
Version used for catapult tests.
AVRO 504J:
Trainer equipped with a Gnome rated 100 hp or LeRhone rated 80 hp.
AVRO 504K:
Trainer equipped with several types of engines. A single seat version was used to fight Zeppelins.
  • AVRO 504K Mk.II: A mix of a 504K fuselage with the undercarriage and wings of the AVRO 504N.
  • Yokosuka K1Y: Two seat trainer of the AVRO 504K, built for the Japanese Navy.
  • U-1 (Uchebnyi - 1) Avrushka: Russian copy of the 504K, over 700 built..
  • MU-1 (Morskoy Uchebnyi - 1): Russian version with floats.
AVRO 504L:
Float version with a Bentley BR1, rated 150 hp or Clerget rated 130 hp or a Le-Rhone rated 110 hp.
AVRO 504M:
Version with a cabin, suited to carry three passengers. Just one built.
AVRO 504N:
Redesigned postwar trainer for the RAF, equipped with one Armstrong Siddely Lynx rated 160 hp.
  • Yokosuka K2Y1: Japanese version of the 504N, equipped with a Mitsubnishi built Armstrong-Siddeley Mongoose rated 130 hp.
  • Yokosuka K2Y2: Improved version of the K2Y1, equipped with one Gasuden Jimpu 2 engine rated 160 hp.
AVRO 504O:
Float version of the 504N.
AVRO 504P:
Never built version of the 504N with seats side by side.
AVRO 504Q:
Three seat version, especially built for the Oxford University Arctic Expedition, equipped with an Armstrong Siddeley Lynx engine.
AVRO 504R Gosport:
Revised trainer with a light weigth structure. Five protoypes flew between 1926 en 1927 with different engines. In the end the Armstrong Siddeley Mongoose rated 150 hp was selected for production.
AVRO 504S:
Two seat trainer, built in Japan by Nakajima.

AVRO 504

This is the original version developed in 1913.

Technical information
Dimensions:
Length: 8,97 m Wingspan: 10,97 m
Height: 3,17 m Wing area: 30,7 m2
Weights:
Empty weight: 558 kg Max. Start weight: 830 kg
Performance:
Max. Speed: 145 km/hr Climbing speed: 5 minutes to 3500 m
Cruising speed: 126 km/hr    
Range: 402 km Service ceiling 4875 m
Miscellaneous:
Engine Type: One Gnôme rated 80 pk
Crew: Two men
Armament: .

 

AVRO 504A

A modified version with smaller ailerons and more broad struts; equipped with one Gnôme engine rated 80 pk.

Technical information
Dimensions:
Length: 8,97 m Wingspan: 10,97 m
Height: 3,17 m Wing area: 30,7 m2
Weights:
Empty weight: 558 kg Max. Start weight: 830kg
Performance:
Max. Speed: 145 km/hr Climbing speed: 5 minutes to 3500 m
Cruising speed: 126 km/hr    
Range: 402 km Service ceiling 4875 m
Miscellaneous:
Engine Type: One Le Rhône 9C rated 80 pk
Crew: Two men
Armament: .

 

AVRO 504B

Version of the AVRO 504 developed on behalf of the RNAS, with a larger fin and a Gnôme or Le Rhône engine rated 80 hp.

Technical information
Dimensions:
Length: 8,97 m Wingspan: 10,97 m
Height: 3,17 m Wing area: 30,7 m2
Weights:
Empty weight: 558 kg Max. Start weight: 830kg
Performance:
Max. Speed: 145 km/hr Climbing speed: 5 minutes to 3500 m
Cruising speed: 126 km/hr    
Range: 402 km Service ceiling 4875 m
Miscellaneous:
Engine Type: One Gnôme rated 80 pk
Crew: Two men
Armament: .

 

AVRO 504K

This was a two seat trainer. It was used with a wide range of different engines. Most used were the Clerget rated 130 hp; Gnome rated 100 pk or Le Rhône rated 110 hp.

Technical information
Dimensions:
Length: 8,97 m Wingspan: 10,97 m
Height: 3,17 m Wing area: 30,7 m2
Weights:
Empty weight: 558 kg Max. start weight: 830 kg
Performances:
Max. speed: 145 km/hr Rate of climb: 5 minutes to 3500 m
Cruising speed: 126 km/hr    
Range: 402 km Service ceiling: 4875 m
Miscellaneous:
Engine type: One Le Rhône 9C rated 80 hp.
Crew: Two men
Armament: None