Performance
SPEED
1,383 mph (2,225 kph) [Diff.-217 mph]
SPEED
1,599 mph (2,574 kph) [Diff.+217 mph]
RANGE
2,299 miles (3,700 km) [Diff.+300 miles]
RANGE
2,000 miles (3,218 km) [Diff.-300 miles]
CEILING
51,952 ft (15,835 m) [Diff.+1,952 feet]
CEILING
50,000 ft (15,240 m) [Diff.-1,952 feet]
RATE-OF-CLIMB
60,000 ft/min [Diff.-2,000 feet]
RATE-OF-CLIMB
62,000 ft/min [Diff.+2,000 feet]