Keystone B-4

The Keystone B-4 was a biplane bomber produced for the United States Army Air Corps.

Made by Keystone Aircraft.

It is the successor of the Keystone B-3 .

Height Main
480.06
Height Alt
4.8 m
Predecessor
Keystone B-3
Length Alt
14.9 m
Jet Or Prop
prop
Lists
* List of bomber aircraft* List of military aircraft of the United States
Range Main
850 mi
Loaded Weight Main
12952.0
Max Speed Alt
110
Type Of Prop
radial engines
Loading Main
11
Power/mass Main
319.68
Developed From
Keystone B-3
Bombs
2500
Max Speed Main
130 mph
Cruise Speed Main
103 mph
Ceiling Main
14000.0
Number Built
25
5
Crew
5
Loaded Weight Alt
5875.0
Cruise Speed Alt
90
Area Main
1145.0
Primary user
United States Army Air Corps
Span Alt
22.8 m
Plane Or Copter?
plane
Power Alt
429.0
Engine(prop)
Pratt & Whitney R-1860-7
Manufacturer
Keystone Aircraft
Status
Retired
Climb Rate Main
580.0
Power Main
575 hp
Number Of Props
2
Power/mass Alt
146
Guns
3
Climb Rate Alt
30 m-s
Length Main
1488.44
Span Main
2275.84
Area Alt
106.4 m²
Range Alt
760
Related
* Keystone B-3* Keystone B-5* Keystone B-6
Empty Weight Main
7951.0
Ceiling Alt
4
300 m
Category
Keystone aircraft
United States bomber aircraft 1930-1939
Empty Weight Alt
3607.0
Loading Alt
55

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