Army Air Forces Statistical Digest,
World War II
Table 196 -- Twentieth Air Force - B-29 Utilization and Maintenance: Jun 1944 to Aug 1945
Month
XX Bomber Command
XXI Bomber Command
Total Hours Flown Per Plane Per Day Operational
Plane Days in Maintenance Per Sortie
a
Total Hours Flown Per Plane Per Day Operational
Plane Days in Maintenance Per Sortie
a
Average
3.4
4.4
6.0
2.1
1944
Jun
3.4
8.1
-
-
Jul
3.7
4.9
-
-
Aug
4.1
7.9
-
-
Sep
3.8
5.6
-
-
Oct
3.4
3.5
-
-
Nov
3.7
4.3
2.2
4.3
Dec
3.4
4.6
4.9
4.3
1945
Jan
3.4
2.6
5.8
5.5
Feb
3.1
2.3
4.6
5.6
Mar
2.5
2.8
8.1
2.4
Apr
-
-
7.3
2.1
May
-
-
5.4
1.9
Jun
-
-
6.2
1.5
Jul
-
-
6.1
1.7
Aug
-
-
5.6
1.6
a
Sorties include ferrying and photo flights