List of Air Ministry specifications
1930–1939

List of Air Ministry specifications

Section Title: 1930–1939
Table Section Text: None

Spec	OR	Type	Designs

M.1/30	Torpedo bomber – Spec. supersedes M5/28 (q.v.)	Blackburn M.1/30, Handley Page H.P.46, Vickers Type 207

2/30	Dual control conversion set issued to Blackburn but then cancelled

3/30	Basic trainer – Avro 504N replacement	Avro Type 621 Trainer

5/30	Mail carrier	Vickers Type 166 Vellore II

6/30	ab initio trainer – Lynx-Avro (Avro 504N) production order	Avro 504N

F.7/30	Fighter capable of at least 250 mph and armed with four machine guns	Blackburn F.3, Bristol Type 123, Bristol Type 133, Gloster Gladiator, Gloster SS.19, Hawker P.V.3, Supermarine Type 224, Westland F.7/30

8/30	ab initio trainer – Moth with Gypsy II order	de Havilland Moth

S.9/30	Two-seat carrier-borne torpedo bomber/three-seat spotter-reconnaissance aircraft	Fairey T.S.R.I, Gloster FS.36; see also S.15/33

16/30	Naval fighter – written for Nimrod	Hawker Nimrod

18/30	Fairey IIIF replacement	Fairey Gordon I

19/30	Naval fighter/reconnaissance with folding wings and interchangeable wheel/float U/C	Hawker Osprey

G.4/31	General-purpose/torpedo bomber – Wapiti & Gordon replacement – Wellesley one of two designs submitted by Vickers and itself a PV – see also G.22/35	Blackburn B-7, Bristol Type 120, Fairey G.4/31, Handley Page H.P.47, Hawker P.V.4, Parnall G.4/31, Vickers G.4/31, Vickers Wellesley, Westland PV-7

5/31	Long-range bomber - Virginia production order	Vickers Virginia

13/31	ab initio trainer with complete freedom for parachute escape by both occupants – D.H.60T accepted with modifications, becoming D.H.82 – see also T.23/31 (some sources give 13/31 as an order for the Ripon IIC)	Avro Type 631 Cadet, de Havilland D.H. 60T Tiger Moth

18/31	Basic trainer – Avro Type 621 Trainer with Lynx engine	Avro Tutor

R.19/31	Three-engined long-range reconnaissance flying boat – Rangoon three-aircraft production order	Short Rangoon

R.20/31	Twin-engined flying boat - all-metal Kestrel-engined Southampton II (Southampton IV/Scapa)	Supermarine Scapa

T.23/31	Tiger Moth I production order	de Havilland Tiger Moth I

R.24/31	"General Purpose Open Sea Patrol Flying Boat"	Saunders Roe London, Short R.24/31 Knuckleduster, Supermarine Stranraer

C.26/31	OR.4	Bomber-transport – Valentia replacement	Armstrong Whitworth A.W.23, Bristol Bombay, Handley Page H.P.51. Vickers Type 230 – (not built)

B.9/32	OR.5	Twin-engine medium day bomber with appreciably higher performance than predecessors – later revised to specify Goshawk power and subsequently re-revised with Goshawk requirement dropped	Vickers Wellington(renamed from 'Crecy'), Handley Page Hampden, Bristol Type 131

S.11/32	Naval catapult observation/spotting seaplane for carriage on cruisers	Fairey Seafox

T.12/32	Trainer	Bristol Type 124

19/32	Conversion of Westland Wapiti into Westland Wallace standard	Westland Wallace

20/32	Three-engined long-range reconnaissance flying boat - improved Iris with Buzzard engines	Blackburn Perth

25/32	Basic trainer – revised-Tutor production order	Avro Tutor I

B.23/32	Twin-engine medium bomber – written for Heyford I & IA production order	Handley Page Heyford Mk. I/IA

P.27/32	Light day bomber – Hart/Hind replacement – see P.23/35	Armstrong Whitworth A.W.29, Fairey Battle, Gloster P.27/32, Bristol Type 136

R.1/33	Patrol/reconnaissance flying boat	Westland-Hill Pterodactyl Mk.VII

R.2/33	Long-range patrol/reconnaissance flying boat	Short Sunderland, Saro A.33

R.3/33	Long-range patrol/reconnaissance flying boat – trials order for Singapore III	Short Singapore III

F.5/33	Twin-engine two-seat turret fighter – later cancelled	Armstrong Whitworth A.W.34, Boulton Paul P.76, Bristol Type 140, Gloster F.5/33, Parnall F.5/33, Westland-Hill Pterodactyl Mk.V

T.6/33	Tiger Moth floatplane two aircraft evaluation order	de Havilland Tiger Moth

13/33	4-engined mail seaplane and 4-engine flying boat carrier – Short-Mayo Composite	Short S.20 Mercury, Short S.21 Maia

14/33	Fairey Gordon II production order	Fairey Gordon II

S.15/33	Naval carrier-borne torpedo bomber/spotter/reconnaissance (TSR) – Fairey 9/30 (q.v.) design modified and re-submitted as T.S.R.II – Spec. replaces S.9/30 & M.1/30 (q.v.)	Blackburn Shark, Fairey Swordfish, Gloster TSR.38

18/33	Radio-controlled Fleet gunnery target aircraft	de Havilland Queen Bee

21/33	Three-seat general purpose/Army co-operation aircraft – Fairey IIIF/Wapiti replacement – improved Vildebeest	Vickers Vincent

F.22/33	Fighter	Bristol Type 141

G.23/33	General purpose aeroplane – Hart for Middle East	Hawker Hardy

24/33	Gloster Gauntlet production order	Gloster Gauntlet

25/33	Twin-engined troop and cargo transport – improved Victoria	Vickers Valentia

T.26/33	Tiger Moth II production order	de Havilland Tiger Moth II

B.29/33	Twin engine medium day bomber with power-operated nose turret	Boulton Paul Sidestrand V (Overstrand)

1/34	Two-seat Army Co-operation Fighter Bomber for the Royal Australian Air Force	Hawker Demon

2/34	High-altitude research aircraft capable of reaching 50,000 ft	Bristol Type 138A

B.3/34	OR.12	Heavy bomber landplane, twin-engine night bomber & bomber/transport – Virginia, Heyford & Hendon replacement – transport requirement later removed after protests from manufacturers	Armstrong Whitworth Whitley, Bristol Type 144

P.4/34	OR.13	Light day bomber for tactical support	Fairey P.4/34, Hawker Henley

F.5/34	OR.15	Single-seat fighter (although contracts were placed for prototypes with three companies none were ordered into production)	Bristol Type 146, Martin-Baker M.B.2, Vickers Type 279 Venom, Gloster F.5/34

6/34	Single-engine biplane amphibian for Australia.	Supermarine Seagull V

G.7/34	Two-seat general purpose light bomber, Interim Hart day bomber replacement	Hawker Hind

8/34	Two-seat interceptor fighter (production of Demon I for the RAF)	Hawker Demon

9/34	Two-seat day bomber and army co-operation aircraft (production of Hawker Audax)	Hawker Audax

10/34	Hawker Hart communications aircraft (two aircraft delivered to No. 24 Squadron RAF)	Hawker Hart

11/34	Torpedo spotter reconnaissance aircraft development (One Fairey Seal fitted with an Armstrong Siddeley Panther VI engine)	Fairey Seal

12/34	Torpedo spotter reconnaissance aircraft development (production of 16 Sharks for use by No. 820 Squadron RAF)	Blackburn Shark

13/34	Bulldog trainer production (production of Bulldog TM Type 124)	Bristol Bulldog

R.14/34	Singapore III production order	Short Singapore III

15/34	Three-seat torpedo bomber (production of Mk III)	Vickers Vildebeest

16/34	Three-seat general purpose aircraft - Vincent I production order including conversion of outstanding Vildebeests to Vincents	Vickers Vincent I

17/34	Torpedo bomber (additional Baffin T.8A aircraft for conversion training, three built)	Blackburn Baffin

18/34	Single-engine day bomber (Hawker Hart IB production)	Hawker Hart

19/34	Two-seat Army co-operation aircraft (production of Audax Is for use in India, 50 aircraft built	Hawker Audax

B.20/34	Twin-engine night bomber - Hendon production order to this spec - see also B.19/27	Fairey Hendon

21/34	Two-seat fleet spotter reconnaissance aircraft (Osprey III production)	Hawker Osprey

22/34	Close-support aircraft – Audax for SAAF	Hawker Hartebees

B.23/34	Twin engine medium day bomber – Overstrand production order	Boulton Paul Overstrand

24/34	Basic trainer - production order for second batch of definitive Tutor design – see 3/30, 18/31 & 25/32	Avro Tutor I

25/34	Amphibian trainer (production of three Clouds)	Saro Cloud

26/34	Float seaplane trainer (production of 16 Tutors for the Seaplane Training School)	Avro Type 646 Sea Tutor

O.27/34	Naval dive bomber	Blackburn Skua

B.28/34	Twin-engine medium bomber – written for Heyford II production order	Handley Page Heyford Mk. II

29/34	Hawker Fury for the South African Air Force	Hawker Fury

30/34	Twin-engined troop and cargo transport – Valentia I production order	Vickers Valentia I

31/34	Armoured day bomber (development of armoured crew protection for the Hart)	Hawker Hart

32/34	Navigation trainer - Prefect production order	Avro 626/Prefect

F.36/34	OR.16	High Speed Monoplane Single Seater Fighter (based on the Hawker submission to F.5/34)	Hawker Hurricane

F.37/34	High Speed Monoplane Single Seater Fighter (based on the private venture Supermarine Type 300 submission)	Supermarine Spitfire

S.38/34	Written for Swordfish production order	Fairey Swordfish I

A.39/34	Two-seat Army co-operation aeroplane	Bristol Type 148, Westland Lysander

B.1/35	OR.19	Twin-engine medium bomber	Airspeed A.S.29, Armstrong Whitworth A.W.39, Handley Page H.P.55, Vickers Warwick

2/35	Naval catapult-launched observation/spotting flying boat for carriage on cruisers	Supermarine Walrus

F.9/35	Two-seat four-gun turret fighter – Demon replacement	Hawker Hotspur, Boulton Paul Defiant, Bristol Type 147

F.10/35	Drawn up for the Spitfire prototype	Supermarine Spitfire

13/35	Naval torpedo-spotter-reconnaissance aircraft - written for Shark production order	Blackburn Shark

14/35	Army Co-operation aircraft - Audax replacement	Hawker Hector

F.14/35	Written for Gladiator I initial production order	Gloster Gladiator I

M.15/35	Land-based general reconnaissance/torpedo-bomber	Blackburn Botha, Bristol Beaufort

16/35	Autogyro - written for Cierva C.30/Avro 671 Rota evaluation order	Avro Rota

18/35	Twin-engined coastal reconnaissance landplane - written for Anson	Avro Anson

20/35	Radio-controlled Fleet gunnery target aircraft - Queen Bee production order	de Havilland Queen Bee

B.21/35	Twin-engine medium bomber - written for Whitley II production order	Armstrong Whitworth Whitley II

G.22/35	General-purpose day and night bomber and coastal-defence torpedo-carrier - Wellesley production order - see also G.4/31	Vickers Wellesley

P.23/35	Written for Battle I production order	Fairey Battle I

G.24/35	General Reconnaissance - Anson replacement	Bristol Type 149, Bristol Beaufort

26/35	Naval fighter/reconnaissance - Osprey IV production order	Hawker Osprey IV

B.27/35	Twin-engine medium bomber - written for Heyford III production order	Handley Page Heyford Mk. III

B.28/35	Drawn up for Bristol 142M	Bristol Blenheim

B.29/35	Written for Harrow initial production order	Handley Page Harrow

O.30/35	Naval turret-fighter - fighter development of Skua accepted	Blackburn Roc, Boulton Paul P.85

Q.32/35	Radio-controlled Fleet Gunnery target aircraft - Queen Bee replacement	Airspeed Queen Wasp

F.34/35	Twin-engined turret-armed fighter	Gloster F.34/35

F.35/35	Very high speed fighter	Airspeed A.S.31 (not built)

36/35	Trans-Atlantic mail plane	de Havilland Albatross

F.37/35	OR.31	Fighter with cannon	Westland Whirlwind, Hawker Hurricane with Oerlikon cannon, Supermarine Type 313, Bristol Type 153

39/35	Twin-engine communications aircraft - Envoy with dorsal turret order for SAAF	Airspeed Envoy

R.1/36	OR.32	Small reconnaissance flying boat	Saro Lerwick, Blackburn B-20

2/36	Development of the Cierva C.30 (cancelled)

3/36	Development of the Avro 652A (cancelled)

4/36	Catapult bomber (cancelled)	Short S.27

5/36	OR.33	Improved Walrus for the Fleet Air Arm	Supermarine Walrus

T.6/36	OR.34	Advanced monoplane trainer mounting manually operated dorsal turret – Don accepted but proved unsuitable	de Havilland Don, Miles Kestrel

M.7/36	Torpedo Spotter Reconnaissance aircraft (cancelled)	Fairey Albacore

O.8/36	OR.36	Reconnaissance dive bomber for the Fleet Air Arm (cancelled)

S.9/36	Three-seat spotter fighter for the Fleet Air Arm (cancelled)	Fairey S.9/36

10/36	OR.38	Written for Beaufort production order	Bristol Beaufort I

11/36	OR.39	Interim General Reconnaissance – aircraft later renamed 'Blenheim IV' and 'Bolingbroke' name transferred to Canadian-built Blenheim	Bristol Bolingbroke I

B.12/36	OR.40	Four-engine heavy bomber 250 mph cruise, 1500 mile range, 4000 lb bomb load	Armstrong Whitworth B.12/36, Short Stirling, Supermarine Type 316

P.13/36	OR.41	Twin-engined medium bomber for "world-wide use" introduction delayed due to production difficulties necessitating further order of Whitleys & Wellingtons	Avro Manchester (2 prototypes ordered), Handley Page H.P.56 (one prototype ordered), Hawker P.13/36 (project only), Vickers Warwick with Rolls-Royce Vulture engines.

14/36	Production specification for the Fairey Battle I	Fairey Battle (500 ordered later reduced to 311)

F.15/36	Written for Hurricane redesigned for Merlin II	Hawker Hurricane I

17/36	Written for Hotspur initial production order - later cancelled	Hawker Hotspur; cancelled

19/36	Naval torpedo-spotter-reconnaissance aircraft - written for Shark additional production order	Blackburn Shark

B.20/36	Twin-engine medium bomber - written for Whitley III production order	Armstrong Whitworth Whitley III

T.23/36	Multi-role crew trainer	Airspeed Oxford

25/36	Written for Skua initial production order	Blackburn Skua

26/36	Written for Roc initial production order	Blackburn Roc

29/36	Written for Wellington (revised Crecy from B.9/32) initial production order	Vickers Wellington I

B.30/36	Written for Hampden initial production order	Handley Page Hampden I

33/36	Written for Blenheim I production order (Rootes)	Bristol Blenheim I

36/36	Written for Lysander initial production order	Westland Lysander I

37/36	Written for Walrus additional production order	Supermarine Walrus I

39/36	Written for Botha additional production order (Boulton Paul) - cancelled	Blackburn Botha

T.40/36	OR.44	Development and production of a trainer version of the Miles Hawk	Miles Magister

S.41/36	Three-seat torpedo/spotter-reconnaissance aircraft - Swordfish replacement	Fairey Albacore

42/36	Target tug - order for Henley target tug conversions by Gloster's	Hawker Henley III

43/36	Autogyro	Cierva C.40 Rota II

B.44/36	Written for Dagger-Hampden (Hereford) production order	Handley Page Hereford I

45/36	Written for Botha additional production order (Blackburn) - cancelled	Blackburn Botha

47/36	Written for Bombay II production order	Bristol Bombay II

T.1/37	Basic trainer	Heston T.1/37 Trainer, Miles M.15, Parnall Heck III, Airspeed A.S.36 (not built)

2/37	Written for Blenheim I production order (Avro)	Bristol Blenheim I

6/37	Twin-engine VIP transport aircraft - order for The King's Flight	Airspeed Envoy

Q.8/37	Radio-controlled Fleet Gunnery target aircraft - Queen Bee replacement - role subsequently carried-on by Queen Wasp - see Q.32/35	Airspeed A.S.37 (not built)

F.9/37	OR.49	Twin-engine day/night fighter	Gloster G.39

F.11/37	Twin-engine two-seat day & night fighter/ground support	Boulton Paul P.92

F.18/37	Heavily armed interceptor armed with 12 x 0.303 mgs and capable of at least 400 mph	Bristol F.18/37, Gloster F.18/37, Hawker Tornado, Hawker Typhoon, Supermarine Type 324, Supermarine Type 325

19/37	Written for Manchester I production order	Avro Manchester I

20/37	Written for Roc floatplane production order	Blackburn Roc

S.23/37	OR.52	Four-engine carrier-based Fleet shadower/follower - low-speed, high-endurance, ship-tracking aircraft - requirement later rendered obsolete due to introduction of radar	Airspeed AS.39, General Aircraft GAL.38

S.24/37	OR.53	Naval torpedo/dive-bomber, reconnaissance - Supermarine entry featured variable-incidence wing	Supermarine S.24/37, Fairey Barracuda

32/37	Written for Halifax initial production order	Handley Page Halifax I Srs 1 - I Srs 3

B.32/37	OR.44	Production contract for a four-engine version of the P.13/36 H.P.56 design	Handley Page H.P.57 Halifax

37/37	Magister I production order	Miles Magister I

38/37	Three-seat communications aircraft & instrument/wireless trainer	Miles Mentor

T.39/37	Three-seat communications aircraft & instrument/wireless trainer	Airspeed AS.42 Oxford for the Royal New Zealand Air Force

42/37	Specification for wooden mockup of Miles X2 large transport aeroplane - not built - lead to Miles M.30X Minor scale testbed	Miles M.30X Minor

43/37	Engine testbed	Folland Fo.108; designs also tendered by General Aircraft & Percival

S.7/38	Naval catapult-launched observation/spotting flying boat – Walrus replacement	Supermarine Sea Otter

O.8/38	Naval carrier-borne fighter/observation – winner developed from Fairey's earlier P.4/34 entry	Fairey Fulmar

B.9/38	Twin-engine medium bomber of simple construction using materials other than light alloy wherever possible	see B.17/38 and B.18/38

14/38	Long-range pressurised high-altitude monoplane transport/airliner (Shorts) – 3 prototypes ordered, construction started – cancelled	Short S.32

15/38	Short/Medium-range monoplane transport/airliner (Fairey) – Fairey FC.1, 14-aircraft production order – cancelled	Fairey FC1, General Aircraft GAL.40

16/38	Trainer - Master I production order	Miles Master T.Mk.I

B.17/38	Twin-engine medium bomber of mixed wood/metal construction	Bristol Type 155 (cancelled by Bristol)

B.18/38	Twin-engine medium bomber of mixed wood/metal construction	Armstrong Whitworth Albemarle

B.19/38	Bomber with 8,000 lb load and eight 20mm cannon in two turrets – revised to become B.1/39	Bristol Type 157

20/38	Communications aircraft – Vega Gull order	Percival Vega Gull

21/38	Communications aircraft – Dominie production order	de Havilland Dominie

S.22/38	Naval helicopter	Cierva C.41 Gyrodyne

24/38	Twin-engine communications aircraft – Envoy production order	Airspeed Envoy

25/38	Twin-engine communications aircraft	Percival Petrel

26/38	OR.65	Three-seat wireless or navigation training aircraft with dual controls – Vega Gull adapted for communications training	Percival Proctor I

28/38	OR.66	Two-seat helicopter - written for Weir W.6	Weir W.6

T.29/38	Twin-engine R/T (Radio Telephony) training aircraft – Dominie three aircraft order	de Havilland Dominie

B.1/39	"Ideal Bomber" four-engined heavy bomber with 9,000 lb bomb load and 20mm cannon defence (revised B.19/38) - work suspended June 1940	Handley Page H.P.60, Bristol Type 159

T.4/39	OR.68	Single-engined trainer	Airspeed Cambridge – (two prototypes ordered, no production contract)

R.5/39	Long-range patrol flying boat – Sunderland replacement – superseded by R.14/40 (q.v.)	Saunders-Roe S.38 – later cancelled

N.8/39	Naval two-seat carrier-borne fighter – Roc replacement – replaced by N.5/40	see N.5/40

N.9/39	Naval two-seat carrier-borne fighter – Fulmar replacement – replaced by N.5/40	see N.5/40

F.17/39	Long-range fighter development of Bristol Beaufort – written for Beaufighter	Bristol Beaufighter

F.18/39	Fighter – Hurricane/Spitfire replacement	Martin-Baker M.B.3, Martin-Baker M.B.5

19/39	Twin-engine transport aircraft – order for Hertfordshire later cancelled	de Havilland Hertfordshire

20/39	Twin-engine communications aircraft – order for No. XXIV Squadron RAF	de Havilland Flamingo

21/39	Twin-engine VIP transport aircraft – order for The King's Flight	de Havilland Flamingo

F.22/39	OR.76	Fighter fitted with heavy-calibre nose-mounted gun	Vickers 414 Vickers Type 432 – also tests with Vickers Type 439 testbed – specification later cancelled

B.23/39	Very high altitude version of Wellington capable of operating at 40,000 ft	Vickers Wellington V

E.28/39	Experimental aircraft using Whittle jet-propulsion with provision for 4 × 0.303 machine guns	Gloster E.28/39

Sentence(s)

The B.1/35 specification of a twin-engined bomber is one of the Air Ministry specifications.
The Air Ministry Specification B.1/35, which sought a twin-engined bomber.
The Air Ministry Specification B.1/35 has the design of a Vickers Warwick, which is a twin-engine bomber.

final_sentence: The B.1/35 specification of a twin-engined bomber is one of the Air Ministry specifications.
final_sentence: The Air Ministry Specification B.1/35, which sought a twin-engined bomber.
final_sentence: The Air Ministry Specification B.1/35 has the design of a Vickers Warwick, which is a twin-engine bomber.