Comparison of Douglas DC-8 and NAA XB-70 Valkyrie

Attribute	Douglas DC-8 ×	NAA XB-70 Valkyrie ×
General
Manufacturer	Douglas Aircraft Co.	North American Aviation NAA
Model	Douglas DC-8	NAA XB-70 Valkyrie
Country	United States	United States
Manufactured from (year)	1958	1964
Manufactured to (year)	1972	1969
Type	Mid Size Passenger Jets	Military Aircraft
Icao	-	XB70
Performance
Engine	4 X Pratt & Whitney JT3D-7 turbofans	6x 6 × General Electric YJ93-GE-3 afterburning
Power, lbf (lbf)	19,000	30,000
Max cruise speed (km/h)	959	3,217
Travel range (km)	3,445	6,901
Fuel economy (km/l)	0.039	0.068
Service ceiling (m)	10,668	23,576
Rate of climb (m/sec)	-	36.42
Take off distance (m)	3,048	2,256
Landing distance (m)	1,981	-
Weights
Max take off weight (kg)	161,028	245,847
Max payload (kg)	15,586	9,072
Fuel tank capacity (l)	89,865	136,074
Baggage volume (m³)	70.8	-
Dimensions
Seats	259	2
Seats - business class	18	-
Cabin height (m)	2.1	-
Cabin width (m)	3.22	-
Cabin length (m)	44.19	-
Exterior length (m)	57.1	56.6
Tail height (m)	-	9.1
Fuselage diameter (m)	3.71	-
Wing span (m)	45.24	32
Wing tips	-	No Winglets