Baseline ATF from Lockheed report

[Stargazer]

While going through a January 1982 Lockheed report under contract for NASA, entitled Systems Study of Transport Aircraft Incorporating Advanced Aluminum Alloys - Final Report, I happened on these, two diagrams depicting none other than the Northrop Versatile ATF (with conventional instead of stealthy air intakes). Interesting that Lockheed would pick a competitor's design here (perhaps the N-353 had already been turned down and wasn't considered a sensitive addition to the report?).

The Advanced Tactical Fighter (ATF) was used as a representative aircraft for application of the low density, high strength and stiffness alloy. A production quantity of 500 aircraft was assumed. (...) The advanced aluminum materials application assessment for military aircraft was made using a representative advanced tactical fighter (ATF) configuration shown in figure 55. The Mach 2.0 fighter aircraft has a gross weight of 21 900 kg (48,300 lb). (...) The structural arrangement for the ATF selected for analysis is shown in figure 57. The weight breakdown used in this analysis is shown in table 55. Only the wing, fuselage, empennage and control surfaces are considered since the landing gear, nacelle, and air induction system are primarily steel or titanium. The structural components considered weigh 6268 kg (13,819 lb), 81 percent of the total structural weight or 29 percent of the gross weight. (...) Alloy C was selected for the fighter aircraft application because of its combined strength, stiffness, and material density characteristics. The minimization of weight by combined selective use of different alloys was not performed.

 

[Sundog]

That design looks very similar to the Northrop design, but it's at least twice as big. Very cool looking, though.