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Why The X?  
User currently offline747-600X From United States of America, joined Jan 2000, 2795 posts, RR: 15
Posted (14 years 6 months 3 weeks 1 day 5 hours ago) and read 1023 times:

Why not just call the 777-200X the 777-200LR before it debuts - why give it the X until its birthday? Like the 747-600 - right now it's just the 747-400X... what gives?


"Mental health is reality at all cost." -- M. Scott Peck, 'The Road Less Traveled'
5 replies: All unread, jump to last
 
User currently offlineAirliners rule From , joined Dec 1969, posts, RR:
Reply 1, posted (14 years 6 months 3 weeks 1 day 5 hours ago) and read 930 times:

As far as i know it means experimental.

User currently offlineSammyk From United States of America, joined Oct 1999, 1690 posts, RR: 0
Reply 2, posted (14 years 6 months 3 weeks 1 day 4 hours ago) and read 916 times:
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Yes, X is for eXperimental. No point in using up a name before everything is official and losing it.

Sammy


User currently offlineTurbulence From Spain, joined Nov 1999, 963 posts, RR: 20
Reply 3, posted (14 years 6 months 2 weeks 6 days 9 hours ago) and read 901 times:

For me, this is an over-use of that letter. X for eXperimental id different from X for future versions, or for commonality. For example, I understand to use 32x to refer to the family Airbus 318, 319, 320 and 321.
Also to call 73x any 737 version from 200 to 800 since they can be refered to as 732, 733, 734, etc, so the x stands for any number, and also to 74x
Same again with M8x, since MD80, MD82, MD83,..., MD88 & MD90 exist.
What I do not understand is why people in this forum refer to the possible future 747 as 747-400X. Presumabily, it will be not 747400anything, but 747-500. So, if 747-100=741, 747-200=742, etc, and generally any 747=74X why not to refer to that as 747-X or simply 74X? In the same case, A3xx is used because the figures following the number 3 in the future Airbus type are not defined (although they would probabily be 350, for continuing the series)

O have I misunderstood the question?

Best turbulences


User currently offline747-600X From United States of America, joined Jan 2000, 2795 posts, RR: 15
Reply 4, posted (14 years 6 months 2 weeks 5 days 21 hours ago) and read 885 times:

The FAA will probably certify the 747-500 before the paint dries. With the technology (computers) we have today, and the tradition of experience, there's just about nothing to experiment with on anything but totaly off or radical ideas like the A3XX.


"Mental health is reality at all cost." -- M. Scott Peck, 'The Road Less Traveled'
User currently offlineSashA From Russia, joined May 1999, 861 posts, RR: 0
Reply 5, posted (14 years 6 months 2 weeks 5 days 13 hours ago) and read 885 times:

Looking at this topic, Cessna Citation X bizjet comes to mind   - claimed to be second fastest commercial aircraft after Concorde. It's the official designation, where X stands for Roman 10 (ten). This is probably unique case in aviation industry for now.

For the rest, X is indeed experimental.



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