brons2 From United States of America, joined Sep 2001, 3033 posts, RR: 4 Posted (3 years 10 months 2 weeks 5 days 7 hours ago) and read 6591 times:
Hello, my question is a fairly simple one. Does the CFM56-7B on the P8A Poseidon have an additional military power rating that is above and beyond the 27,000 lbs the engine develops in airline service?
Firings, if well done, are good for employee morale.
Cost is a major factor. The 737 is built on an existing commercial line with mostly commercial components and processes. Spares and other support can be obtained though the world wide spares net work etc ...
True, a jet is not as efficient at low speed, but it can get there faster thus reducing the search area required.
Other than the C-130 or A-400, there are no turboprop out there that can match the volume. And even though the volume of the P-8 is bigger than the P-3, the amount of "stuff" they are putting on make them want a larger airframe
BTW does the US make any modern commercial turboprop any more?
KC135TopBoom From United States of America, joined Jan 2005, 12287 posts, RR: 51
Reply 4, posted (3 years 10 months 2 weeks 2 days 15 hours ago) and read 6115 times:
The P-8A is air refuelable with a Boom equipped Tanker. It is also not replacing the P-3C on the ASW missions, but replace the EP-3E on some of its missions. The P-8A is also better at detecting modern SSKs than the P-3C is.
The CFM-56-7B27C engine develope 27,300 lbs of maximum thrust, and does have an emergency thrust that is well above the maximum .
Eskimotail From United States of America, joined Mar 2010, 39 posts, RR: 2
Reply 9, posted (3 years 10 months 1 week 4 days 21 hours ago) and read 5292 times:
Quoting rwessel (Reply 7): Yes it does. I've read six additional tanks, which would lead me to expect that they're just the standard 737 cargo deck aux tanks
P8 has a total of 7 aux tanks, 10 fuel tanks total. They are not the standard 737 cargo deck aux fuel tanks that BBJ and other military 737s carry. Tactical aircraft vs logistics aircraft = major delta.
Quoting KC135TopBoom (Reply 4): not replacing the P-3C on the ASW missions, but replace the EP-3E on some of its missions.
EP-3 replacement not ordered yet by USN, P8 is a direct 1 for 2 replacement for the P3C in ASW role.
Quoting Dreadnought (Reply 1): My other thought is why a jet? Wouldn't a more modern turboprop be more suitable for low/slow sub-hunting? How about adapting the C-130 for the job
Why does a sub hunt have to be done low and slow? The detection mechanisms are remote from the airplane once deployed. Can't share specificly but P8 in its final blocks or tranches will not prosecte ASW in the way we know it now. A high altitude, cruise optimised power plant and wing with .88 MACH or better dash speed will be just fine, and capable of things that a C-130 can not do. Read up on all the available releases and articles over the last 7 years and it will become clear.