Mission Number 278
19/20 July 1945
Hitachi Urban Area (90.14)
Number A/C Airborne:
% A/C Bombing Primary:
96.92% (126 Primary and 1 Opportunity)
Type of Bombs and Fuzes:
AN-M47A2, 100# incendiary bombs with instantaneous nose and E46,
E36, AN-M17A1, 500# incendiary clusters set to open 5,000 feet above
Tons of Bombs Dropped:
963.2 tons on Primary and 7.2 tons on Opportunity.
Time Over Primary:
200020K - 200153K
Altitude of Attack:
12,200 - 13,650
Weather Over Target:
9/10 - 10/10
Total A/C Lost:
Resume of Mission:
Reconnaissance showed .88 sq. mi. (or 64.5%) of the city's built-up
area was destroyed. RCM A/C
observed fires from 60 miles away.
was seen by only 6 A/C. Three A/C were non-effective.
One E/A sighted did not attack.
Flak was medium and heavy, meager and inaccurate encountered
by approximately 1/3 of the
B-29s. One Wind-Run A/C
A/B. Five survivors from a ditching due to mechanical failure.
One B-29 lost to unknown reasons.
One B-29 landed
at Iwo Jima.
Average bomb load: 15,214 lbs. Average fuel reserve: 910