Zorba
Lifer
- Oct 22, 1999
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EK had it right, I just used the Lear as an example of something that might have somewhat close to the range of a B-2 (enough to be able to go a distance before refueling) along with the speed. Avionics and cockpit could be mocked up to resemble the B-2. It's practice, so evading radar isn't really needed unless you need to actually practice that. My point really is that there could be other, far cheaper to operate, airframes out there than can give our B-2 pilots the air time needed to remain proficient at flying a B-2 on training missions...or at least ones that don't require actual stealth and actually dropping bombs. Huge plus if that can be accomplished is less stress on our expensive and irreplaceable airframes.
If that can't be done, or, done well enough where they can remain mission capable, then I'm fine with them using the real thing. I hope they've at least considered it though, instead of just saying, F yeah, lets go fly our B-2's around!
Chuck
I am an airline engineer and I used to design military jet engines, and even did improvements on the engines used on the B-1B (the F101).
First, aircraft do not like sitting, don't know why they just don't. Sometimes we would have aircraft come in for a long modification (~45 days), once we fired them back up, leaks everywhere avionics not working, etc stuff that wasn't touched at all, it could take days to fix everything. Aircraft in for 3 or 4 days on a maintenance check, (i.e. lots of components removed/checked/overhauled) would return to service with no issues.
Second, corrosion (the number one killer of an airframe) is caused mostly by calendar time and environment. 40K feet isn't a very corrosive environment due to the lack of moisture, the ground is a very corrosive environment. This is probably the biggest reason the B-2 has climate controlled hangars.
Third, fatigue (the number two killer of an airframe) is caused from flight cycles, not hours. So flying around town for 30 minutes, on a bomber will do about 96% (yes this is a real number, from an engine) of the damage to the aircraft as a 30 hour flight. Fighters will do more damage on longer flights, because they have much higher in flight cyclic loadings.
Flight time does eat away at the life engine airfoils, slowly, but the air force can still get parts for the F118 engine, so not a big deal.
Fourth, military aircraft really don't build time and cycles all that quickly, especially compared to airliners. B-52s built in the 60s have less time and cycles than 767s built in the late 90s.
Fifth, if you have the money to spend, extending the life an airframe is not that difficult. The maintenance checks get longer and more detailed. The number of inspections and findings go up, but you can fix just about anything. I have seen crazy aircraft damage fixed in a month, such as a 757 that took a direct hit from an F2 tornado or the reskinning of a large portion of the fuselage due to storm damage. Fixing fatigue and corrosion damage is just a matter of time and money.
Sixth, training in Sims and other aircraft is fine, but at some point you have to train in the real equipment, flying a "real" sortie. You must also give the mechanics a chance to learn how to work on the aircraft.
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