Re: B747 technical questions

Date:         01 Aug 97 04:04:17 
From: (Filip De Vos)
Organization: University of Ghent, Belgium
References:   1 2 3
Followups:    1
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Karl Swartz (kls@ohare.Chicago.NOSPAM.COM) wrote:

: For testing, the engine being tested almost always replaces one of the
: standard engines.  This was certainly true for GE's 747-100 engine
: testbed, used to flight test the GE-90, and for the original 747-100
: which Boeing used to flight test the 777's other PW and RR engines.

On which wingstation is the new engine mounted? Those GE-90s windmills
are huge!

: To do otherwise would require substantial structural modifications --
: in these cases, an engine with substantially greater thrust than the
: original engines was being tested, and you couldn't just stick that
: on the wing at any old place.

: There are probably several counter-examples, but the only one I can
: think of is a 720 (or maybe a 707) that PWC used to flight test small
: engines.  In this case, the test engine was mounted near the nose of
: the plane.

On the (suitably-modified) cargo-door.

Looking at other odd engine additions, the Vulcan bombers with a
retractable pod housing the Bristol Olympus must be amongst the oddest.
This engine was meant for the BAC TSR-2 and Concorde.

Filip De Vos                  The idea that space travel is inherently
                              enormously expensive is fraudulent.                    John S. Lewis