RAF Bomber Command / USAAF 8th AF Aircraft Available for Operations (1939-1945)

Source: The Strategic Air War Against Germany, 1939-1945: The Official Report of the British Bombing Survey Unit

R.A.F. Bomber Command	September 1939	January 1940	July 1940	January 1941	July 1941	January 1942	July 1942	January 1943	July 1943	January 1944	July 1944	January 1945	8 May 1945
Battle	141	118	73
Blenheim	123	92	234	176	160	58	39
Boston						5	47	37
Ventura								36
Mitchell								5
Mosquito							13	23	51	72	138	206	269
Hampden	85	70	109	111	169	161	37
Whitley	75	68	103	92	105	89
Wellington	91	90	148	229	391	353	256	187	124	15
Manchester						48
Stirling					22	38	69	104	203	139	37
Halifax					31	50	102	173	331	373	562	521	388
Lancaster							107	274	444	627	864	1,096	1,320
Total	515	438	667	608	878	802	670	839	1,153	1,226	1,601	1,823	1,977
VIIIth and XVth USA.A.F. Bomber Commands	September 1939	January 1940	July 1940	January 1941	July 1941	January 1942	July 1942	January 1943	July 1943	January 1944	July 1944	January 1945	8 May 1945
Fortress + Liberator								156	670	1,667	3,645	3,115	3,300
Grand total	September 1939	January 1940	July 1940	January 1941	July 1941	January 1942	July 1942	January 1943	July 1943	January 1944	July 1944	January 1945	8 May 1945
USAAF+RAF	515	438	667	608	878	802	670	995	1,823	2,893	5,246	4,938	5,277