Boeing 777 Engine Size
I've heard that the diameter of the engines on the Boeing 777 is comparable to the fuselage diamater on a
Boeing 737. Is that true? I know they're big but are they really THAT big?
According to Boeing, the internal cabin diameter of the newer 737
models is 11 ft 7 in (3.53 m). The Rolls Royce Trent 800 series turbofan engines used on the
Boeing 777 have a maximum diameter of 9 ft 2 in (2.8 m). Meanwhile,
Pratt & Whitney states that the fan diameter of its PW4000 series used on the 777 is slightly larger at 9 ft 4 in
(2.85 m). The 737 fuselage is therefore about 2 ft 3 in, or 25%, larger than the 777 engine diameter. As aircraft
engines go, those of the 777 are rather large, but the final judgement depends on your defintion of "comparable."
- question from Matt
Massive General Electric turbofan on the Boeing 777-300ER
However, the comparison becomes even more incredible if we consider the new General Electric GE-90-115B turbofans
that will be fitted on the latest long-range 777-200LR and 777-300ER models. This engine is the largest and
most powerful turbofan built to date, being some 11 ft 3 in (3.43 m) in diameter. In this case, the 737 cabin is a
mere 3% wider than the 777 engine.
- answer by Joe Yoon, 30 September 2001
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