The VLRAAM is one of the world's largest air to air missiles. Its
other advanced features include an AESA radar, a
infrared/electro-optical seeker (under the yellow-orange cover on the
forward section above the nosecone), and satellite navigation midcourse
correction.
Popular Science
The new,
larger missile's added value is not just in range. Another key feature:
its large active electronically scanned (AESA) radar, which is used in
the terminal phase of flight to lock onto the target. The AESA radar's
large size—about 300-400% larger than that of most long range air-to-air
missiles—and digital adaptability makes it highly effective against
distant and stealthy targets, and resilient against electronic
countermeasures like jamming and spoofing.
The VLRAAM's backup sensor is a infrared/electro-optical seeker that
can identify and hone in on high-value targets like aerial tankers and
airborne early warning and control (AEW&C) radar aircraft. The
VLRAAM also uses lateral thrusters built into the rear for improving its
terminal phase maneuverability when engaging agile targets like
fighters.
Interestingly,
the ability to glide may be a key feature as well. A 2016 research
paper by Zhang Hongyuan, Zheng Yuejing, and Shi Xiaorong of Beijing
Institute of Control and Electronics Technology linked to the VLRAAM
development suggests that the midcourse portion of the VLRAAM's flight
will occur at altitudes above 30 km (about 18.6 miles). Flying at such
low pressure, low drag high altitudes would allow the VLRAAM to extend
its range (similar to hypersonic gliders). The high altitude also makes
it difficult for enemy aircraft and air defenses to shoot it down
midflight. Finally, high altitude flight means that the VLRAAM would
have a high angle of attack against lower flying targets, which reduces
the response time for enemy evasive action.
A U.S. F-35 fires an AIM-120. U.S. Navy photo
In any event, the weapon is much more substantial than is the U.S.
military’s own longest-range air-to-air missile, the AIM-120 Advanced
Medium-Range Air-to-Air Missile. The AMRAAM is just 12 feet long and
seven inches in diameter. The latest version of the American missile,
the AIM-120D, reportedly boasts a maximum range in excess of 90 miles.
VLRAAM Reportedly relies on a powerful rocket motor than can propel the
munition at “hypersonic” speeds of up to Mach 6 — half-again faster than
the AIM-120D’s own top speed.
The AIM-120D makes do with an
older-style, and less effective, mechanically-steered radar.
While making huge strides when it comes to targeting, the U.S. military
is falling behind in the advancement of air-launched munitions.
The Pentagon has not yet begun developing a new long-range air-to-air missile to eventually replace the AIM-120D.
Of course, a
very-long-range missile is useless in the absence of good targeting.
Unless you’re willing to destroy every airplane within reach — whether
they’re enemy warplanes, civilian passenger jets or even friendly
forces — you need to identify opposing planes before attacking them.
The
identification problem prevented the U.S. Navy from successfully
deploying its own AIM-54 Phoenix long-range air-to-air missile in
combat. The Navy retired the munition in 2004 in favor of cheaper and
more practical AMRAAMs.
The Chinese military is apparently working on a solution to the
identification problem, and has proposed building a targeting network
around the high-flying Divine Eagle sensor drone. A Divine Eagle could
pass targeting data to a VLRAAM-armed fighter — and potentially even to
the missile itself, provided any operational version of the munition
incorporates a datalink.