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Avro 504

The Type 504 was produced in more variants than any other Avro Type, and almost more than any other British aircraft. This page just summarises the production totals for each variant and production totals for the various manufacturers. With so many ex-miliary machines being acquied by the civil market post war, along with unused airframes bought back by Avro, it may be imposible to accurately determine the number of original Type 504 airframes produced, but hopefully the figures given here come somewhat near the mark.
For full production details of each variant, follow the links below.

Produced Variants
504Original model.  80 h.p. Gnome, Le Rhône or Clerget powerplants.
504AModified with smaller ailerons and broader struts.  80 h.p. Gnome, Le Rhône or Clerget powerplants.
504BVersion for RNAS with heavy wing spars and a larger fin. 80 h.p. Gnome or Le Rhône powerplants.
504CSingle-seat anti-zeppelin aircraft for the RNAS. The 504C was fitted with an extra fuel tank, in place of the observer.
80 h.p. Gnome powerplant.
504DSingle-seat anti-zeppelin aircraft for the Royal Flying Corps. 80 h.p. Gnome powerplant.
504E100 h.p. Gnome Monosoupape powerplant.
504FOne aircraft fitted with the 75 h.p. Rolls Royce Hawk powerplant. An order for 30 was cancelled and replaced by 504Bs.
504GTwo-seat training variant of the 504B for the RNAS. 80 h.p. Gnome powerplant.
504HUsed for catapult trials. 80 h.p. Gnome powerplant.
504JTwo-seat training aircraft. 100 h.p. Gnome or 80 h.p. Le Rhône powerplant.
504J Mk.IIOriginal designation of 504R
504KTwo-seat training aircraft. As the 504J with a universal mount to take different powerplants. Postwar aircraft reconditioning was
undertaken to Specfication 19/23 and the final production batch was to Specification 15/26.
504K Mk.IITwo-seat training aircraft featuring 505K fuselage with 504N wings and undercarriage.
100 h.p. Gnome or 1300 h.p. Clerget powerplants.
504L Floatplane version of 504K. 150 h.p. Bentley BR1, 130 h.p. Clerget or 110 h.p. Le Rhône powerplants. (But see also note 1)
504MThree-seat cabin biplane. 100 h.p. Gnome powerplant.
504NTwo-seat training aircraft to meet Specifications 32/24, 3/27 and 6/30 for an ab-initio trainer. 160 h.p. Armstrong Siddeley
Lynx powerplant.
504NSCanadian designation of float equiped Type 504N. Equivalent to Type 504O
504OFloatplane version of 504N.
504QThree-seat cabin biplane. 160 h.p. Armstrong Siddely Lynx powerplant.
504RReworked and reduced weight variant of the 504J. 100 h.p. Gnome Monosoupape, 140 h.p. Armstrong Siddeley Genet Major
or 150 h.p. Armstrong Siddeley Mongoose powerplant.
504SSee note 1.
Proposed Variants
504PSide-by-side seating version of the 504N.
504SVariant of 504R with 100 h.p. Bristol Lucifer. This designation was also used by Japan for their float equiped 504Ks.

Foreign Derivatives of the Avro 504 Line
Japan
K1Y Two-seat training aircraft for the Japanese Navy, a Japanese derivative of the 504K to replace the latter in Japanese Navy
service. Built by Yokosuka, Nakajima, Kawanishi (as the Type 0) and Watanabe.  Designated Type 13 Landplane Trainer
(K1Y1) or with twin floats the Type 13 Seaplane Trainer (K1Y2). 130 h.p. Gasuden Benz inline powerplant.
K2Y Japanese version of the Avro 504N. Built by Yokosuka, Kawanishi, Watanabe, Mitsubishi, Nippi and Showa. Designated K2Y1
with a 150 h.p. Mitsubishi-built Armstrong-Siddeley Mongoose powerplant and K2Y2 with a 160 h.p. Gasuden Jimpu 2
powerplant.

Russia

U-1 (Uchebnyi-1) Avrushka (Little Avro) - version of the 504K. Developed by the design bureau of S.V. Ilyushin, and fitted with a
120 h.p. M.2 powerplant. The VVS designation U-3 was originally assigned in 1925, but this was changed to U-1 in 1926.
MU-1 (Morskoy Uchebnyi-1) - a seaplane version of the U-1.



Total Avro 504 Production By Type

Production Summary Top Page Top 


Type

U.K. Built

Non-U.K. Built

Overall

Original Build

Conv.

Canc'd

Original Build

Conv.

Canc'd

Original Build

Conv.

Canc'd

 Proto

1

 

 

 

 

 

1

 

 

 504

67

 

 

 

 

 

67

 

 

 504A

1485

 

100

 

 

 

1485

 

100

 504B

200

 

 

 

 

 

200

 

 

 504C

80

 

 

 

 

 

80

 

 

 504D

6

 

 

 

 

 

6

 

 

 504E

10

 

 

 

 

 

10

 

 

 504F

 

(1)

 

 

 

 

 

(1)

 

 504G

30

 

 

 

 

 

30

 

 

 504H

 

(12)

 

 

 

 

 

(12)

 

 504J

2070

 

100

 

 

 

2070

 

100

 504K

4997

(22)

1803

331

(15)

498

5328

(37)

2301

504K Mk.II

 

(5)

 

30

 

 

30

(5)

 

 504L

6

(12)

 

 

(13)

 

6

(25)

 

 504M

 

(1)

 

 

 

 

 

(1)

 

 504N

561

(17)

 

121

(27)

6

682

(44)

6

 504O

 

(7)

 

 

 

 

 

(7)

 

 504Q

 

(1)

 

 

 

 

 

(1)

 

 504R

28

 

 

34

 

 

62

 

 

 

9541

(78)

2003

516

(55)

504

10057

(133)

2507




Wartime Production By Mark and Manufacturer

Production Summary Top Page Top 

Constructor

 Proto

 504

 504A

 504B

 504C

 504D

 504E

 504F

 504G

 504H

 504J

 504K

 Total

 Avro

1

67

634 

50

30

6

10

(1)

30

(12)

1400

1222

3437

 Bleriot & Spad

100

100

 Brush

50

150

260

460

 Eastbourne

50

122

172

 Grahame-White

900

900

 Greig & Henderson

205

205

 Harland & Wolff

300

150

450

 Hewlett & Blondeau

400

400

 Humber

300

320

620

 London

66

66

 Morgan

200

200

 Parnall

200

90 

400

690

 Regent


20

20 

 Sage

310

310

 Saunders

201

201

 Savage

111

111

 Sunbeam

60

200

281

541

1

67

1485

200

80

6

10

(1)

30

(12)

2070

4947

8896




Post War, New Build, By Mark and Manufacturer

Production Summary TopPage Top 

Total Post War Production By Mark
   

504K

504
Mk.II

504L

504M

504N

504O

504Q

504R

Total

381

30

6

 

682

 

 

62

1161

  

Summarised as Follows :-
U.K. Built

Constructor

504K

504
Mk.II

504L

504M

504N

504O

504Q

504R

Total

 Avro

50

 

 

 

561

 

 

28

639

 Eastbourne

 

 

6

 

 

 

 

 

6

Sub Total

50

 

6

 

561

 

 

28

645


Non-U.K. Built

Constructor

504K

504
Mk.II

504L

504M

504N

504O

504Q

504R

Total

 AAEC (Australia)

6

 

 

 

 

 

 

 

6

 Aichi

30

 

 

 

 

 

 

 

30

 Canadian Aeroplanes

2

 

 

 

 

 

 

 

2

 Canadian Vickers

 

 

 

 

13

 

 

 

13

 Danish N.S.

 

 

 

 

3

 

 

 

3

 FMA (Argentina)

 

 

 

 

 

 

 

34

34

 KEA (Greece)

 

 

 

 

24

 

 

 

24

 Nakajima (Japan)

250

 

 

 

 

 

 

 

250

 Netherlands Indies AAA

16

 

 

 

 

 

 

 

16

 RSASW (Siam)

 

 

 

 

50

 

 

 

50

 SABCA (Belgium)

27

 

 

 

31

 

 

 

58

 TNCA (Mexico)

 

30

 

 

 

 

 

 

30

Sub Total

331

30

 

 

121

 

 

34

516



Post War, Bought Back Airframes, Built From Spares or Conversions By Mark and Manufacturer

 

Bought Back Airframes/ Built From Spares (U.K. Only)

Constructor

504K

504
Mk.II

504L

504M

504N

504O

504Q

504R

Total

 Avro

8

 

6

1

12

7

1

 

35

 C.B. Field

3

 

 

 

 

 

 

 

3

 Essex F.C.

1

 

 

 

 

 

 

 

1

 G & H Aviation

2

 

 

 

 

 

 

 

2

 Kent Aircraft Services

7

 

 

 

 

 

 

 

7

 Southern Counties

1

 

 

 

 

 

 

 

1

Sub Total

22

 

6

1

12

7

1

 

49


Bought Back Airframes/ Built From Spares (Non-U.K.)

Constructor

504K

504
Mk.II

504L

504M

504N

504O

504Q

504R

Total

 AAEC (Australia)

9

 

 

 

 

 

 

 

9

 Wigram (NZ)

6

 

 

 

 

 

 

 

6

Sub Total 

15

 

 

 

 

 

 

 

15


  

Conversions From A Different Type (U.K. Only)

Constructor

504K

504
Mk.II

504L

504M

504N

504O

504Q

504R

Total

 Avro

 

5

6

 

2

 

 

 

13

 Unknown

 

 

 

 

3

 

 

 

3

 Sub Total

 

5

6

 

5

 

 

 

16


Conversions From A Different Type (Non-U.K.)

Constructor

504K

504
Mk.II

504L

504M

504N

504O

504Q

504R

Total

 Argentina

 

 

 

 

4

 

 

 

4

 AAC CFS (Australia)

 

 

2

 

 

 

 

 

2

 Canada

 

 

5

 

 

 

 

 

5

 Canadian Vickers

 

 

 

 

21

 

 

 

21

 Danish N.S.

 

 

 

 

2

 

 

 

2

 New Zealand

 

 

4

 

 

 

 

 

4

 Sweden

 

 

2

 

 

 

 

 

2

 Sub Total

 

 

13

 

27

 

 

 

40

 



Exports to Foreign Air Arms of British Built or Converted Aircraft, Including Imperial Gifts

Production List Top Page Top 


Customer

 504K

 504N

 504O

 504R

 Total

 Argentina

20

 

 

10

30

 Australia

53

 

 

 

53

 Belgium

50

17

 

 

67

 Brazil

17

4

 

 

21

 Canada

63

 

 

 

63

 Chile (Military Aviation)

22

 

 

 

22

 Chile (Navy)

 

 

6

 

6

 China

18

 

 

 

18

 Denmark (Army)

5

 

 

 

5

 Denmark (Navy)

6

1

 

 

7

 Dutch East Indies

36

 

 

 

36

 Estonia

9

 

 

6

15

 Finland

1

 

 

 

1

 Greece

14

6

 

 

20

 Guatemala

2

 

 

 

2

 India

41

 

 

 

41

 Ireland

5

 

 

 

5

 Japan

30

 

1

 

31

 New Zealand

21

 

 

 

21

 Norway

3

 

 

 

3

 Peru (Army)

12

 

 

 

12

 Peru (Navy)

 

 

 

6

6

 Portugal

30

 

 

 

30

 South Africa

30

 

 

 

30

 Siam

 

20

 

 

20

 Spain

4

 

 

 

4

 Sweden (Air Force)

 

1

 

 

1

 Sweden (Navy)

5

 

 

 

5

 Uruguay

17

 

 

 

17

 White Russia

18

 

 

 

18

 

532

49

7

22

610

 



Foreign Derivatives

Production Summary Top Page Top 

Type

Original Build

Canc'd

Japan

K1Y

104

K2Y

360

Russia

U-1

664

16

MU-1

73

1201

16




Notes
  1. 504Ks supplied to Japan were in both landplane and seaplane versions, generally referred to (confusingly) as 504L and 504S respectively, though they were officially Avro Land Based Trainer and Avro Seaplane Trainer.

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V1.3.0 Created by Roger Moss. Last updated February 2017