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BAC 1-11 Vs. F28: Question About The Spey...  
User currently offlineLVZXV From Gabon, joined Mar 2004, 2041 posts, RR: 37
Posted (9 years 10 months 3 weeks 2 days 4 hours ago) and read 3886 times:

A question regarding noise regulations:

If the BAC 1-11 and Fokker F28 are not only of the same era but also powered by virtually the same engines, the Rolls Royce Spey, how is it that there are less than five passenger-configured 1-11s still flying in the world (and all but one ROMBAC-built) against almost 100 F28s? Surely, the noise regulations would apply equally to both aircraft, or is the F28 substantially quieter than its British counterpart?


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Regards,

ZXV




How do you say "12 months" in Estonian?
1 replies: All unread, jump to last
 
User currently offlineNorthStarDC4M From Canada, joined Apr 2000, 2992 posts, RR: 37
Reply 1, posted (9 years 10 months 3 weeks 1 day 22 hours ago) and read 3784 times:
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As i recall it has something to do with the F.28 being light enough to fall under the lower size limit that governs airliner noise levels.

Also the F.28 uses the Spey 555-15 "Spey Junior" vs the BAC 1-11s Spey 512 family, very possible they have a lower noise signature.



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