Avro 504 Derivatives
For a description of the format and data included in
Production Tables, see here .
Produced Variants
Type 527 Two seat reconnaissance fighting biplane, based on the Type 504E with Type 504K wings. 150 h.p. Sunbeam powerplant. Type 536
Type 504K airframe with the fuselage widened by 9in to accommodate four passengers in two side-by-side pairs in the rear cockpit,
and a Type 504L fin and rudder. One 130 h.p. Clerget or 150 h.p. Bentley B.R.I powerplant.
Type 540 Gunnery training version of Type 504K (possibly based on the Type 536). The design was done for Japan, with some being built there under licence. (4) Type 545 Experimental Type 504K fitted with a 90 h.p. Curtiss OX-5 powerplant. Type 546 Type 536 with enclosed accommodation for three passengers, the pilot retaining an
open cockpit. One 150 h.p. Bentley B.R.I powerplant. Type 547 Four passenger commercial triplane using many surplus Type 504K components. 160 h.p. Beardmore powerplant.
Type 547A Type 547 with 240 h.p. Siddeley Puma powerplant to meet the requirements of the 1920
Air Ministry small Commercial Aeroplane Competition.
Type 548 Type 504K airframe modified to carry two passengers in the rear cockpit . One 80 h.p. Renault or 90 h.p. R.A.F. la powerplant.
Type 548A
Type 548 with 120 h.p. A.D.C. Airdisco powerplant. Type 551 Type 504K fitted with a 180 h.p. Wolseley Viper powerplant. Type 552 Two seat trainer, similar
to the Type 551 but fitted with full dual controls and tapered ailerons. Early aircraft featured an additional fuel tank above
the centre section, but on later aircraft this was replaced by two underwing tanks just outboard of the upper wing centre
section. Optional wheeled ( Type 504K style) or float undercarriage, floatplane versions featuring an additional large fin, similar to the Type 504B , but retaining the standard 'comma' rudder. One 180 h.p. Wolseley Viper powerplant. Type 552A Canadian built version, similar to later build Type 552. Built as single seat with
the 'N' Type undercarriage or as two seater with single centreline float. Type 552B
Type 552 fitted with a single central main float and two wingtip floats. UK built prototype only.
Type 582 Type 504N fuselage fitted experimentally with special thick high-lift wing and single-bay struts. Type 585 Experimental Type 504R fitted with the 'N'-type undercarriage. One 90 h.p. Avro Alpha powerplant.
Projected Variants
Type 527A Type
527 with longer span wings. Type 547B Floatplane derivative of Type 547A. Type 553 Trainer version of Type 548. Type 557 Single seat monoplane
with fuselage from Type 552, undercarriage from Type 504 and a new parasol mainplane. 180 h.p. Wolseley Viper powerplant. The Type Number was reallocated to the Ava.
Type 598 Warregull
I Two seat trainer for the Australian Government based on the Type 504 . 160 h.p. Armstrong Siddeley Lynx powerplant. Type 599 Warregull II Redesigned variant of Type 598. Type 599A Warregull
II Seaplane variant of Type 599.
Serial Range
C/n
Batch Qty
Conv.
Canc'd
Notes
1 aircraft built by A.V. Roe & Co. Ltd., Newton
Heath, Manchester. First flew early 1916. none 1
To Works Order 2100
Total Production
1
C/n
Initial Registration
Notes
10
conversions by A.V. Roe & Co. Ltd., Hamble, Hants, between May & August, 1919, plus one completed as Type 546 . ATC.1
K-114
/ G-EACC Retained by A.V. Roe. First flew at Hamble in April 1919 and as a seaplane in June.
ATC.2 K-104
/ G-EAAQ Retained by A.V. Roe. Crashed as K-104; G-EAAQ ntu. ATC.3 K-105 / G-EAAP
Retained
by A.V. Roe. Used for joy riding from Hounslow Heath.
ATC.4 K-106 / G-EAAO Retained by A.V. Roe. Crashed
as K-106; G-EAAO ntu. ATC.5
K-137
/ G-EADC Retained by A.V. Roe. ATC.6 K-161 / G-EAGM Retained by A.V. Roe. Crashed
as K-161; G-EAGM ntu. ATC.7
K-165
/ G-EAHA Believed sold in Netherlands ATC.8 K-166 / G-EAHB Retained by A.V. Roe. Used
for joy riding ATC.9
K-116
/ G-EACG Retained by A.V. Roe. ATC.11 K-139 / G-EADV Retained by A.V. Roe.
ATC.23
G-EAOM Completed as Type 546 12 conversions by A.V. Roe &
Co. Ltd., Newton Heath, Manchester. Completed mid 1919.
B.1 K-173 / G-EAID Retained by A.V. Roe and
placed in storage at Alexandra Park. B.2 K-174 / G-EAIE Retained by A.V. Roe and
placed in storage at Alexandra Park. B.3 G-EAKD Retained by A.V. Roe and placed in
storage at Alexandra Park. B.4
K-175
/ G-EAIF Retained by A.V. Roe and placed in storage at Alexandra Park. B.5 G-EAJR
Retained
by A.V. Roe and placed in storage at Alexandra Park.
B.6 G-EAKJ Retained by A.V. Roe. Used for joy
riding at Brighton and elsewhere until sold to Surrey Flying Services at Croydon in April 1924.
B.7 G-EAKK
Retained
by A.V. Roe and placed in storage at Alexandra Park.
B.8 G-EAKL Retained by A.V. Roe and placed in
storage at Alexandra Park. Re-erected by Surrey Flying Services as G-EBOY. B.9 G-EAKM Retained
by A.V. Roe and placed in storage at Alexandra Park until sold to Surrey Flying Services at Croydon in July 1925.
B.0 G-EAKN
Retained
by A.V. Roe and placed in storage at Alexandra Park until sold to F.J.V. Holmes (Berkshire Aviation Tours Ltd).
B.1 G-EAKO
Retained
by A.V. Roe and placed in storage at Alexandra Park.
B.2 G-EAKP Retained by A.V. Roe and placed in
storage at Alexandra Park until sold to Surrey Flying Services at Croydon in June 1925. 4 conversions by Surrey Flying Services Ltd., Croydon
in 1926-1927. G-EBOF Rebuild of stored airframe. Retained by Surrey Flying
Services. P8
G-EBOY
Rebuild
of G-EAKL. Retained by Surrey Flying Services. G-EBRB Rebuild
of stored airframe. Retained by Surrey Flying Services.
G-EBTF Rebuild
of stored airframe. Retained by Surrey Flying Services.
Total Production
(26)
Serial Range
C/n
Batch Qty
Conv.
Canc'd
Notes
An unknown number of Type 504K airframes were converted to Type 540 gunnery trainers.
(??)
See Note 1
Total Production
(??)
C/n
Initial Registration
Military Serial
Notes
1
conversion by A.V. Roe & Co. Ltd., Newton Heath, Manchester, in October, 1919. G-EAPR
H2323
Retained
by A.V.Roe. See note 2. Total Production (1)
C/n
Initial Registration
Notes
1
conversion by A.V. Roe & Co. Ltd., Hamble, Hants, in December, 1919. ATC.23 G-EAOM
Retained
by A.V. Roe. Construction started as Type 536 but completed as 546. Total Production (1)
C/n
Initial Registration
Notes
1
aircraft built by A.V. Roe & Co. Ltd., Hamble, Hants as the Type 547. First flew early 1920.
547/1
G-EAQX
To
Australia for Qantas as G-AUCR. 1
aircraft built by A.V. Roe & Co. Ltd., Hamble, Hants as the Type 547A. First flew mid 1920. A second machine was not
completed. 547A/1 G-EAUJ
Demonstrator.
Retained by A.V. Roe. Total Production 2 (1 Not Completed)
C/n
Initial Registration
Military Serial
Type
Notes
4 conversions
by A.V. Roe & Co. Ltd., Hamble, Hants, 1919-21.
G-EAPQ
H2322
548 Prototype, first flew late 1919. To W.G. Pudney
in February 1922. ATC.14
K-147
/ G-EAFH 548 Converted
from civil 504K. To the Welsh Aviation Co, May 1921.
G-EALF
548 Converted from civil 504K. Retained by A.V. Roe.
548/4 G-EAVH
548 To
Uruguay, 1920. 3 conversions
by A.V. Roe & Co. Ltd., Hamble, Hants, in 1924. Built from spares. 5100 G-EBIT
548A To North Sea Aerial & General Transport Co.
Ltd, Brough. 5101
G-EBIU
548A To
North Sea Aerial & General Transport Co. Ltd, Brough.
5102 G-EBIV
548A To North Sea Aerial & General Transport Co.
Ltd, Brough. 11 conversions
by the Aircraft Disposal Co., Ltd., Croydon, Surrey, 1921-26.
G-EAAL
548 Converted from civil 504K. To de Havilland in
1925, named "Vida". G-EAYD
548 Converted from civil 504K.
G-EBAG
H2025
548 To Southern Counties Aviation, June 1925.
G-EBFL
H2053
548 To de Havilland Aircraft Co. Ltd., March 1923.
G-EBFM
H2070
548 To de Havilland Aircraft Co. Ltd., March 1923.
G-EBHK
H7488
548 Sold abroad August 1925.
G-EBHL
H2067
548 To de Havilland Aircraft Co. Ltd., August 1923.
G-EBKN
E449
548A Converted from 504K in 1925. To A.G. Head, Shoreham,
in February 1930. R/R3/RE/70022
G-EBOK
548 Built
from spares? To Light Planes (Lancs) Ltd., (Lancashire Aero Club), June 1926. G-EBPJ
E9337
548 To Nigel Norman, October 1926.
G-EBPO
E3387
548 To Newcastle-upon-Tyne Light Aeroplane Club,
November 1926. 3 conversions
by Surrey Flying Services Ltd., Croydon, Surrey, 1921-22.
G-EBAJ E3043
548 To Marconi Wireless Telegraph Co. Ltd., December
1921. G-EBBC H2212 548
To
Derwnt Hall Caine, January 1922. G516
G-AABW
548 Built
frome spares? Dual control trainer. Retained by Surrey Flying Services Ltd. 7 conversions by the Henderson School Of Flying Ltd., Brooklands, Surrey, 1927-29
G-EAJB
H2598
548 Converted from civil 504K. Retained by Henderson
Flying School Ltd. G-EBRD 548
Built
from spares. Retained by Henderson Flying School Ltd.
G-EBSC
548 Built from spares. Retained by Henderson Flying
School Ltd. G-EBVE 548
Built
from spares. Retained by Henderson Flying School Ltd.
G-EBWH
548 Built from spares. Retained by Henderson Flying
School Ltd. G-EBWJ 548
Built
from spares. Retained by Henderson Flying School Ltd.
G-AADT F8767
548 Retained by
Henderson Flying School Ltd. 2
conversions by the Berkshire Aviation Tours. Ltd., Barton, Manchester, 1931. G-ABMB
H2232
548 To the Giro Aviation Co, May 1931.
G-ABSV
548 To
the Giro Aviation Co, December 1931. Total Production (30)
Non-UK Civil Registered Type 548 (Converted From Type 504K )
C/n
Initial Registration
Military Serial
Type
Notes
Australia
4 conversions by individual owners as noted.
D.1 G-AUBG
548A Converted by Matthews Aviation, Essendon.
G-AUBK
548 Converted
by E. W. Percival, Richmond NSW, but still registered as a 504K. Later converted to Type 548A .
G-AUBK
548 Type
504K G-AUEW rebuilt in 1928 by D.G. Brims & Sons, Milton Vic, but still registered
as a 504K. Later to Type 548A . G-AUEW
548A Converted by Courier Aircraft Ltd.
Canada
3 conversions by Canadian Vickers Ltd., Vickers Works, Montreal, Canada, 1920-21
1160 G-CACD
548 To
Canadian Aircraft Co Ltd, Winnipeg. G-CACI D8997 548 Ex 504K G-CABS. To Canadian Aircraft Co Ltd, Winnipeg.
1161
G-CACN
548 To McCall-Hanrahan Aero Services, Calgary.
Total
Production (7)
U.K. Built Type 548 Delivered For Export As Military (Converted From Type 504K )
Serial Range
C/n
Type
Qty
Notes
Portugal
2 aircraft to the Portuguese Grupo de Aviação de Informação
(GAI, Aviation Reconnaissance Group), origin unknown, in 1924. 3,?? 548A
(2)
Latvia
2 aircraft to the Latvijas Aviācijas Nodaļa (Latvian Aviation Division), origin unknown, in
December 1924. 32,
33 16874, 16891 548 (2)
Total Production
(4)
C/n
Initial Registration
Notes
1
aircraft converted by A.V. Roe & Co. Ltd., Newton Heath in 1920. G-EAPR
Ex
Type 545 . See note 2. Total Conversions (1)
Serial Range
C/n
Batch Qty
Conv.
Canc'd
Notes
Argentina
14 aircraft ordered from A.V. Roe & Co. Ltd., Hamble, Hants, for Argentina. Delivered
in 1921 - 1922 E-1
- E-14 (14)
See
note 4. Chile
6 aircraft ordered from A.V. Roe & Co. Ltd., Hamble, Hants, for Chile.
Delivered in 1923
(6)
Total Production
(20)
UK Civil Registered Avro 552 (all landplanes except see note 2)
C/n
Initial Registration
Notes
1 aircraft converted by A.V. Roe &
Co. Ltd., Newton Heath in 1921. G-EAPR Prototype, ex Type 551 . See note 2. 1 aircraft
converted by L.G. Anderson in 1930. G-ABGO Ex Type 586 autogiro G-EBTX. See note
2. 3 aircraft built from spares
by C.B. Field in 1933-34. G-ACAW Built from spares. To Plane Advertising
Ltd. 12
G-ACAX
Built
from spares. To Plane Advertising Ltd. 9 G-ACRP Built from spares. To
Plane Advertising Ltd. Total Conversions (5)
Non-UK Civil Registered Avro 552
C/n
Initial Registration
Notes
Bulgaria
2 aircraft converted by A.V. Roe & Co. Ltd., Newton
Heath, for Bulgaria, converted from unknown Type 504K airframes. B-BAHA Converted from 504K B-BBAH
Converted
from 504K Total Conversions (2)
Non-UK Built Avro 552A Delivered As Military
C/n
Initial Registration
Notes
Canada
5
aircraft built by Canadian Vickers Ltd., Vickers Works, Montreal, Canada, for the RCAF. Delivered between December 1924
and March 1925. Known
as Avro Viper Landplane (A.V.L.) in service. All aircraft carried civil registrations. C.V.10 G-CYFT
C.V.11 G-CYFU
C.V.12 G-CYFV
C.V.13 G-CYFW
C.V.14 G-CYFX
Canada
9
aircraft built by Canadian Vickers Ltd., Vickers Works, Montreal, Canada, for the RCAF. Delivered between May and July
1925. Known
as Avro Viper Seaplane (A.V.S) in service. All aircraft carried civil registrations. C.V.20 G-CYGB
C.V.21 G-CYGC
C.V.22 G-CYGD
C.V.23 G-CYGE
C.V.24 G-CYGF
C.V.25 G-CYGG
Converted
to 504NS C.V.26
G-CYGH
C.V.27 G-CYGI
C.V.28
G-CYGJ
Total
Production 14
C/n
Initial Registration
Notes
1
conversion by A.V. Roe & Co. Ltd., Hamble, Hants, March, 1927. 5104 G-EBKQ Type 504K (504N Development aircraft) G-EBKQ became the only Avro 582 and later a Type 504O . Total Conversions (1)
C/n
Initial Registration
Notes
1
conversion by A.V. Roe & Co. Ltd., Hamble, Hants, December, 1926. R3/R/70000 G-EBPH
Ex
504R G-EBPH. Total Conversions (1)
Type
Built New
Conv.
Canc'd
Total
Type 527
1
1
Type 536
(26)
26
Type 540
??
??
Type 545
(1)
1
Type 546
(1)
1
Type 547
2
1
3
Type 548
(32)
32
Type 548A
(7)
7
Type 551
(1)
1
Type 552
(27)
27
Type 552A
14
14
Type 552B
(1)
1
Type 582
(1)
1
Type 585
(1)
1
17
(98)
1
Notes The exact number of
Type 540 conversions unknown. Thanks to Eric Harlin for clarifying the origin of the Type 540. Unused
Type 504K H2323 was fitted with a Curtiss OX-5 powerplant in 1919 to became the prototype Type 545 G-EAPR, the Curtiss being replaced by a Wolseley Viper in 1920, the aircraft now becoming the sole Type 551 . Fitted with an additional overwing fuel tank, dual controls and tapered ailerons, G-EAPR became the prototype Type 552 in 1921. Initially retaining the standard Type 504K skid type undercarriage, G-EAPR was fitted with a V-type undercarriage for the aerial Derby of 16 July that year, then almost
immediately afterwards was fitted with twin floats. This optional float / 504K skid undercarriage became the standard Type 552 configuration. In 1922, G-EAPR was again modified to test various features to be incoporated in the Type 504N , including replacing the overwing fuel tank by two tanks just outboard of the upper wing centre section, and the 'N' Type
undercarrige. In this form it probably became the Type 552A , although this designation is also applied to the Canadian built aircraft. Finally, fitted with a rather antiquated flat
bottomed cental float, G-EAPR became the prototype Type 552B . In 1927, the fuselage of G-EAPR was used to create the Cierva C.8V G-EBTX (Avro Type 586), reconverted to a Type 552 as G-ABGO for Leslie George Anderson, Kensington, London W.8, in 1931. Frequently erroneously referred
to Type 552B, these 9 two seat single float seaplanes were in fact designated Type 552A, the same as the single seat landplanes.
They differed from the Avro produced Type 552B in having a significantly more modern float design.
All aircraft could be equiped as land or floatplanes. It has been noted that when floats were fitted, they had the prefix
'H' to their serial, but the only photograph of an 'H' prefix this author has seen belonged to a landplane!.
Production References Avro
Aircraft Since 1908, A.J. Jackson (Putnam, 1965)Canadian Aircraft Since 1909,
K.M. Molson and H.A. Taylor (Putnam, 1982)
Aviation News, Vol.15, No.20 "British
Aircraft in Argentine Navy Service", Jorge F. Nunez Padin
Air Britain Digest, 1989/1 (Air-Britain Publications)
Air
Britain Digest, 1989/3 (Air-Britain Publications)
Air Britain Digest, 1990/3
(Air-Britain Publications)
The British Civil Aircraft Registers 1919-1928 , Peter W. Moss (Air Britain
Publications, 1969)The British Civil Aircraft Registers G-FAAA-'FAAZ (1920-1928) & G-AAAA-'AAZZ (1928-1930),
Peter W. Moss (Air Britain Publications, 1971) British Isles Civil Aircraft Registers 1919-2011 (LAAS International,
2011) http://www.histarmar.com.ar/Armada%20Argentina/AviacionNaval/TR-AT-Avro552.htm Avro 548 in Portuguese service at https://ex-ogma.blogspot.com/search?q=avro+548
Page
Revision History Page Top Revised at Version 1.4.0 Corrected 548/548A quantities. Added user
details.
V1.4.4 Created by Roger
Moss. Last updated August 2020