Air Force Secretary Frank Kendall has decided not to proceed with replacing the F-35’s F135 powerplant with either of two alternatives.
aviationweek.com
Wholehearteadly agree with him on this! I know i'll probably get some flak, but in a way i'm happy that cool heads prevailed and decided not to go with the uber-expensive AETP reengine route. With the current budget realities, it was a matter of time before being forced to choose which aircaft do you want new engines to go in:
F-35, or
NGAD. And siding with the F-35 would have meant no NGAP. Aka: A repeat of the YF-119 vs YF-120 saga, except this time propitiated by lack of cash.
For starters, besides the integration troubles with the B and C variants, is it worth the hassle when it's combat range isn't that great to begin with ?(for the Pacific) Yes, the XA-100 would have provided a 30% increase, but how much is that?
Hastily made comparison of what a 30% increase would look like without taking other factors into account.
F-35A | F-35B/STOVL | F-35C |
---|
669nmi, 6.69*30+669=869nmi | 505nmi, 5.05*30+505=656.5nmi | 670nmi: 6.7*30+670=871nmi |
I mean it's good, but not that much of an improvement, measly 200nmi, with only 150 for the B. The MQ-25, set to enter service in 2026, and adding couple of LO EFT's under each wing could extend it to 1400-1700nmi and i feel
still wouldn't be enough for the distances of the Pacific and/or to safely operate outside the Chinese A2/AD bubble. For an engine upgrade to be effective, an obligatory combat radius of
at least 1000nmi on internal fuel would be ideal.
Now let's see how a mix of historical, current and proposed planes would fare with ACEs ,
again a very simplistic calculation, without payload, altitude, speed or weight considered.
CAC J-20 | Convair B-58 | GD F-11B | LM FB-22(Concept) |
---|
Combat radius: 1100nmi 11.0*38+1100=1518nmi | 17.4*38+1740=2401.2nmi | 18.3*38+1830=2525.4nmi | 18*38+1800=2484nmi |
30% vs
38% increase in radius! That's insane! NGAD is supposed to be
BIG, so how far it could go, compared to all F-35 versions, would increase exponentially the more fuel the plane carries. It is obvious the bearing costs of a retrofit wouldn't have been worthy, and a larger plane with deeper fuel tanks capable of crossing vast distances from the start will see itself more beneffited than a small airframe.
(Meanwhile, in an AU, those in charge are pulling their hairs after the NGAP effort stalls in favor of developing a conventional turbofan engine, resulting in a 6th gen with Ok-ish reach and watered down capabilities, since the funds that otherwise would've been allocated to its development were eaten giving F-35s new shiny engines! Buy hey, that's what mattered, right?)
(Everything written above is entirely subjective and just my 2 Cents opinion)