I beg to differ. Chinese espionage has been so prolific and at times effective against the US, I wonder how much information they on our ATF studies and program. This via the Lockheed Martin website.
Model Of Boeing's Proposal For ATF
Boeing designers focused on the weapon bay
and essentially designed the airplane around it. Wind tunnel results,
especially those related to flight at high angles of attack, affected
the arrangement, size, cant angles, and placement of the tails. The
design used a single chin inlet with an internal splitter to feed the
two engines. The inlet had an internal variable ramp (combined with the
splitter) to reach its higher design speeds.
Lockheed Proposal Configuration For ATF
Lockheed's proposal configuration, called
090P, had a streamlined nose, trapezoidal wing planform with positive
sweep on both the leading and trailing edges, and four tail surfaces
(two horizontal and two vertical). The large vertical tails were canted
outwards. The leading and trailing edge sweep angles of all of the
surfaces were aligned at common angles. The design had a wide strake
that ran in a straight line from the wing leading edge outboard of the
inlets to the point of the nose.
Lockheed Configuration 090P Four-View
Lockheed's proposal configuration, called
090P, had a streamlined nose, trapezoidal wing planform with positive
sweep on both the leading and trailing edges, and four tail surfaces
(two horizontal and two vertical). The large vertical tails were canted
outwards. The leading and trailing edge sweep angles of all of the
surfaces were aligned at common angles. The design had a wide strake
that ran in a straight line from the wing leading edge outboard of the
inlets to the point of the nose.
