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B-29 Superfortress vs B-47 Stratojet

B-29 Superfortress vs B-47 Stratojet at a glance — top speed 575 vs 977 km/h, range 5,230 vs 3,240 km, max takeoff weight 60,555 vs 100,000 kg, built 3,970 vs 2,042 units.

Boeing B-29 Superfortress bombers side profile drawing
🇺🇸 B-29 SuperfortressFull specs
Boeing B-47 Stratojet bombers side profile drawing
🇺🇸 B-47 StratojetFull specs
Specifications
B-29 Superfortress B-47 Stratojet
Origin country 🇺🇸 United States 🇺🇸 United States
Category Bombers Bombers
Manufacturer Boeing Boeing
First flight 21 September 1942 17 December 1947
Year introduced 1944 1952
Number produced 3970 units 2042 units
Average unit price $640K $3 million
Wing area 161.3 m² 132.7 m²
Wingspan 43.1 m 35.4 m
Height 8.5 m 8.5 m
Length 30.2 m 32.7 m
Maximum speed 575 km/h 977 km/h
Operational range 5,230 km 3,240 km
Service ceiling 9,710 m 10,089 m
Max. takeoff weight 60,555 kg 100,000 kg
Empty weight 33,793 kg 35,867 kg
Total thrust 4 x 1,640 kW 6 x 3,266 kgf
Performance Radar Chart
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Frequently Asked Questions

Which is faster, the B-29 Superfortress or B-47 Stratojet?
The B-47 Stratojet is faster with a maximum speed of 977 km/h compared to the B-29 Superfortress's 575 km/h, a difference of 402 km/h.
Which has longer range, the B-29 Superfortress or B-47 Stratojet?
The B-29 Superfortress has a longer range at 5,230 km compared to the B-47 Stratojet's 3,240 km.
Which can fly higher, the B-29 Superfortress or B-47 Stratojet?
The B-47 Stratojet has a higher service ceiling at 10,089 meters (33,100 ft) compared to the B-29 Superfortress's 9,710 meters (31,856 ft).
Which is heavier, the B-29 Superfortress or B-47 Stratojet?
The B-47 Stratojet has a higher maximum takeoff weight at 100,000 kg compared to the B-29 Superfortress's 60,555 kg.
Which is larger, the B-29 Superfortress or B-47 Stratojet?
The B-47 Stratojet is longer at 32.6 meters compared to the B-29 Superfortress's 30.2 meters.
Which is more expensive, the B-29 Superfortress or B-47 Stratojet?
The B-47 Stratojet is more expensive at approximately $3.0 million per unit compared to the B-29 Superfortress at $0.6 million.
Which entered service first, the B-29 Superfortress or B-47 Stratojet?
The B-29 Superfortress entered service first in 1944, 8 years before the B-47 Stratojet which entered service in 1952.
Which has been built in greater numbers, the B-29 Superfortress or B-47 Stratojet?
The B-29 Superfortress has been produced in greater numbers with 3,970 units compared to 2,042 units of the B-47 Stratojet.