B-X (comparable to Backfire) of 1978

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In a memorandum by Secretary of Defense Harold Brown to President Carter on 11 September 1978, Secretary Brown mentioned a new bomber "B-X", with "range and payload comparable with that of Backfire". Was he referring to what would become the B-2? Or something entirely different?

3. B–X. A new bomber, of range and payload comparable with that of Backfire, but more effective, because of recent very significant technological advances, of which you are aware. This bomber would be greatly superior to the Backfire (and the B–1) in ability to penetrate air defenses because of a combination of low detectability features, improved countermeasures and improved defensive systems. It would be particularly effective in combination with a cruise missile attack because the “fixes” to the Soviet air defense required for the cruise missiles would be at cross-purposes with those required for the bomber (and vice versa). As you are aware, we could start full-scale development of such a bomber as early as 1979 and achieve IOC by 1984. Juxtaposition with B–1 could pose some political problems, but also has some potential for political justification—as you know, we had it in mind when the B–1 was cancelled.5

5. Carter wrote “no” in the right margin next to this paragraph.

He also mentioned a "reusable" cruise missile, which is hard to imagine. Perhaps only its warhead is dropped and the rest of the cruise missile comes back?

7. Tactical cruise missiles of radius in the 1000-km category, with terminal guidance (10-foot accuracy or better), carrying conventional warheads, and reusable—to reduce costs greatly. Needs a bit more thought about targets (I am pushing the concept hard) but could soon be ready for full-scale development.8

8. Carter wrote “MIRV’s?” in the right margin next to this paragraph.

 
In a memorandum by Secretary of Defense Harold Brown to President Carter on 11 September 1978, Secretary Brown mentioned a new bomber "B-X", with "range and payload comparable with that of Backfire". Was he referring to what would become the B-2? Or something entirely different?
I think he was referring to the B-2. A Backfire has 53,000lbs bombload and 3700nmi range, while a B-2 has ~50,000lbs bombload and a 6000nmi range.
 
As for SecDef Brown's comment that "As you are aware, we could start full-scale development of such a bomber as early as 1979 and achieve IOC by 1984", would the B-2 have reached IOC in 1984 if FSD had been launched in 1979?
 
As for SecDef Brown's comment that "As you are aware, we could start full-scale development of such a bomber as early as 1979 and achieve IOC by 1984", would the B-2 have reached IOC in 1984 if FSD had been launched in 1979?
I believe so. There was a late requirements change for low altitude flight that forced a redesign that completely changed the trailing edge into the now-familiar sawtooth design from what originally looked like the B-21 with a single point at the end of the fuselage. And that redesign delayed the B-2 about 4-5 years.
 
Brown is definitely referring to what eventually became the B-2. It didn't become the Advanced Strategic Penetrating Aircraft until Lockheed received a contract for the concept phase in 1979. Then in one brief month in 1981 after the two-bomber decision was made, it went from ASPA to LRCA to ATB. In the SPO, we just called it "the bomber".

The 1984 IOC date is clearly overly optimistic. I suspect it is based on schedules that Ben Rich was throwing around in marketing meetings with Bill Perry and Gene Fubini. That schedule is pretty much consistent with the schedules they were using for Senior Trend, which was on the verge of entering FSD when this memo was written. One could argue that if they had simply taken Lockheed's ATA-B concept, given the Skunkworks a few billion dollars, and come back 5 years later to see what they had achieved, it might have been doable.
 
I believe so. There was a late requirements change for low altitude flight that forced a redesign that completely changed the trailing edge into the now-familiar sawtooth design from what originally looked like the B-21 with a single point at the end of the fuselage. And that redesign delayed the B-2 about 4-5 years.
It depends on the definition of the word "late". The requirement to fly 200 ft at mach .8 was generated 3 or 4 months after the start of the source selection, or 7 months prior to award of the FSD contract in November 1981. The design turmoil occurred early in 1983 after Northrop completed their modeling and simulation of the PDR-1 design. The re-design was complete long before PDR-2, which occurred on schedule.
 

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