4K
A Boeing 747-400 cruising at altitude, leaving four distinct contrails outlined by clear blue skies.
© Unknown
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Spotter's notes
The silhouette, four engines, and winglets point to this being a Boeing 747-400, though airline and registration are not visible.
Aircraft identity
ICAO Type
B744
Model
747-400
Manufacturer
Boeing
Military
Civilian
Technicals
Engine
Pratt & Whitney PW4000 / General Electric CF6-80C2 / Rolls-Royce RB211-524G/H (varies by operator)
Thrust
Each engine: approx. 250–282 kN (varies by engine type)
Wingspan
64.44 meters
Length
70.66 meters
Height
19.41 meters
MTOW
396,890 kg
Range
13,450 km
Capacity
416 passengers (typical 3-class), up to 524 (2-class)
Cruise Speed
907 km/h
Noise Rating
Variable, ICAO Chapter 3/4 (~93-99 dB)
Location
Viewing Spot
Over Alaska at 37,000 feet.