Avro 504K Mk.II

For a description of the format and data included in Production Tables, see here.

For description of Type 504K MkII see Production Summary

U.K. Built Type 504K Mk.IIs Delivered As Military

Serial Range	C/n	Batch Qty	Conv.	Canc'd	Notes
U.K.	Prototype built by A.V. Roe and Co. Ltd., Hamble, Hants, as a private venture in 1924 (but see note 1).
J8029?			(1)
Sweden	3 aircraft supplied by A.V. Roe and Co. Ltd., Hamble, Hants, to the Swedish Navy Air Service (Svenska Flygvasende). Delivered 1924. See Note 4.
8 - 10	R3/CL/16915, R3/CL/16949, R3/CL/16932		(3)		Redesignated Sk3 in 1926 and allocated new serials 074 - 076
	Total Production		(4)

UK Civil Registered Type 504K Mk.II

All Converted From Type 504N

C/n	Initial Registration	Notes
4 aircraft converted by A.V. Roe and Co. Ltd., Hamble, Hants, in 1936, from Military Type 504N. See Note 3.
J8758	G-ADGB	To Zenith Airways, Camber.
J9689	G-ADGC	To Zenith Airways, Camber.
K1962	G-ADGM	To Aviation Commerce Ltd.
H2962	G-ADGN	Originally a 504N converted from 504K. To Aviation Commerce Ltd.
Total Conversions (4)

Non-U.K. Built Type 504K Mk.IIs Delivered As Military

Serial Range	C/n	Batch Qty	Conv.	Canc'd	Notes
Mexico	46 aircraft ordered from the Talleres Nacionales de Construcciones Aeronáuticas (TNCA - National Aviation Workshops), Mexico City, Mexico, for the Mexican Air Force (Fuerza Aerea Mexicana). Deliverd 1925. See Note 2.
40-A-133, 40-A-137		46
41-A-133, 41-A-138
42-A-132, 42-A-134
42-A-139, 42-A-149
42-A-150, 42-A-159
43-A-135, 43-A-140
43-A-150
44-A-136
45-A-137, 45-A-142
51-A-144, 51-A-148
51-A-158
52-A-144, 52-A-149
53-A-145
54-A-154
55-A-147
56-A-148
56-A-148, 56-A-148
57-A-154
58-A-155
60-A-157
64-A-161
65-A-162
66-A-173
67-A-159
68-A-175
69-A-176, 69-A-182
71-A-163
72-A-169
73-A-170
75-A-167, 75-A-172
75-A-182
76-A-168
82-A-189
90-A-187
95-A-192
	Total Production	46

Non-UK Civil Registered Type 504K Mk.II

Original Military Serial	Initial Registration	Notes
Mexico		All the following aircraft are assumed to be conversions of the TNCA built Anáhuac, but actual provenance is unknown.
	XB-ACB	To G. Rentaria Mexico DF
	XB-ACC	To M. Saena Mexico DF
	XB-ACR	To Preston S. Tanner Mexico DF
	XB-ADG	To Miguel Monraz Guadalajara
	XB-AEL	To Alvaro Salazar (Indicated as Anahuac)
	XB-AEP	To E.Apellaniz and F. Juarez
	XB-AEQ	To Juan F. Azacarate
	XB-AFR	To Andrea Guardia
	XB-AFY	To J. William Morgan
	XB-AHL	To Angel Lojero
Sweden		Total (1)
SE-ACC		Ex Swedish Navy Air Service. To Tage Wahrgren, Löberöd.
Total Conversions (11)

The original 504 Mk.II was a hybrid, featuring the fuselage af a 504K married to a 504N undercarriage and mainplanes and fitted with a 100 h.p. Gnome Monosoupape powerplant.
George Jenks, in Aeromilitaria [2] speculates that the prototype 504 Mk.II may have become J8029. This was apparently a rebuild of 504K F9723 under Air Ministry Contract 667589/26, powered by a 100 h.p. Gnome Monosoupape and was on the charge of the Home Aircraft Depot Station Flight, Henlow, from October 1926 to March 1928.
Known locally as the Avro Anáhuac. One Anáhuac was donated to Guatemala on 15 June 1927, named Juárez and another to Costa Rica on 18 July 1929 (Rivas [7] gives 1927), named Juan Santamaria.
In 1935, four late-production 504Ns were re-engined with 130 h.p. Clerget rotaries for joy-riding, thus making them the equivalent of the 504K Mk.II of ten years earlier, but these were distinguished by the later Frise ailerons and under-wing fuel tanks of the 504N.
It is usually quoted that five Type 504K aircraft were supplied to Sweden but flyghistoria.org [6] identifies the final 3 supplied as Type 504 Mk.II.

Avro Aircraft Since 1908, A.J. Jackson (Putnam, 1965 & 1990)
Aeromilitaria, 1995/4 (Air-Britain Publications)
Central American And Caribbean Air Forces, Daniel P Hagedorn (Air-Britain (Historians), 1993)
http://www.avrosys.nu/aircraft/Skol/403sk3/403Sk3.htm
Avro 504 in Sweden at http://www.svfplhist.com/
Svenskt Flyghistoriskt Forum • Visa kategori - Sk 3, Avro Fb (flyghistoria.org)
British Combat Aircraft in Latin America, Santiago Rivas (Hikoki, 2019)

Page Revision History

Revised at Version 2.0.0

Revised at Version 1.4.0