"John S. Shinal" wrote:

(Token) wrote:

"but have missed every shot on high bypass engine vehicles."

I believe the A-10 Thunderbolt II uses the TF34 high-bypass-ratio
turbo fan? How many A-10's got hit during Desert Storm 1 by shoulder
launchhed or IR guided weapons? A hint, far more than one.

I wonder what the difference in bypass ratio is on the TF34
compared to common airliner engines (never seen those numbers) ?

BPR of the TF34-GE-100 is 6.2. The CF6-80C2, quite common on airbus and Boeing
widebody twins as well as some 747s and MD-11s, is 5.05. The PW4000, similarly rated
to the CF6-80C2 and used by the same a/c types, is 4.85. Just google on "PW4000 bpr",
or whatever other engine you're interested in, and you'll get several hits.

Guy