Re: A 777 with four engines.

Date:         16 Jun 98 02:15:22 
From:         kls@ohare.Chicago.COM (Karl Swartz)
Organization: Chicago Software Works, Menlo Park, California
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>Has Boeing given any consideration to making a 777 with four engines?

Yeah, over thirty years ago.  It's called a 747.  777-200IGW will soon
have a MGTOW of 656,000 lbs and the 777-200X is planned for 750,000 lbs,
which compares nicely with the 700,000 lbs of the original 747-100.
Similar passenger capacity, too, especially if you compare the 777-300
to the 747-100/200.

>It might be a hit as a long range go anywhere transport.

With over 1,150 examples delivered so far, most would agree it has been
a hit.  Only the 727, 737, and DC-9 family have done better, though the
A320 family will almost certainly pass the 747 production total within
the next three or four years.

>It would drive Airbus nuts.

That's probably a fair assesment, too.

As for just sticking two more engines on a 777, many in this group have
noted how the aerodynamics (not to mention structure) of a wing which
is designed for a twin are quite different from that of a wing designed
for a four-engined aircraft.  The A330/340 wing accomplishes this but
has some serious compromises as a result, which is why the A340-500/600
will have a new or mostly new wing.

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