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- Path: sparky!uunet!noc.near.net!bigboote.WPI.EDU!wpi.WPI.EDU!chadwemy
- From: chadwemy@wpi.WPI.EDU (Chad Barret Wemyss)
- Newsgroups: sci.aeronautics
- Subject: Re: V/STOL fighters
- Date: 21 Jan 1993 16:32:21 GMT
- Organization: Worcester Polytechnic Institute
- Lines: 47
- Distribution: world
- Message-ID: <1jmj6lINN9lm@bigboote.WPI.EDU>
- References: <alien.02mo@acheron.amigans.gen.nz>
- NNTP-Posting-Host: wpi.wpi.edu
-
- In article <alien.02mo@acheron.amigans.gen.nz> alien@acheron.amigans.gen.nz (Ross Smith) writes:
- >
- >The two Yakovlev V/STOL fighters, the Yak-38 and Yak-141, both hover on
- >three engines, and are fitted with an automatic ejection system (Eskem)
- >which basically chucks the pilot overboard if anything goes wrong. The
- >designers' attitude seems to be that if you lose an engine while hovering,
- >you're going to crash and there's no point in trying to avoid it. If
- >they're right, would it be better to build single-engine fighters (sort of
- >a scaled-up Harrier)? A single-engine fighter might be safer in the hover,
- >but less safe in combat; a twin would at least have a chance of making a
- >conventional landing after a Sidewinder up a tailpipe. In any case, would
- >a single-engine fighter the size of an F-15/F-22/MiG-31/Su-27 be practical
- >at all?
- >
- The biggest combat problem of a VTOL aircraft is that of heat-seeking missiles.
- In any aircraft where the engine thrust is used to lift the plane, the exhaust
- nozzles must be arranged around the CG (Center of Gravity). Since the engines
- are the major heat source in an aircraft that is flying at sub-sonic speeds,
- this is where the missiles will most likely hit. With the engines amidships
- (around the CG), even a relatively small blast, such as that of a shoulder-
- launched SAM, will cause catastrophic engine, control and structural damage.
- A larger missile like the Sidewinder will cut the plane in half. (All right,
- maybe an exaggeration, but it will more than likely rupture fuel and hydraulic
- lines, cut power systems and flight control systems, and turn the engine into
- a large number of high-speed fragments, which will then cut the aircraft in
- half from the inside.)
-
- I do agree that near-front airfields are increasingly vulnerable to attack, and
- that the smartest way to go is VTOL aircraft. However, there is only a slim
- chance that any air force will be willing to put up the money required to make
- a large VTOL fighter or strike aircraft. While the Harrier is a good plane, it
- is limited in range for the interdiction/strike mission, and in both payload
- and staying time for the Close Air Support (CAS) mission. The major advantage
- of a VTOL aircraft in CAS is the ability to base them much closer to the front
- lines than conventional FW aircraft. This allows a much faster response time,
- and a greater dispersal of the aircraft to prevent counter-attack.
-
- Scaling up the Harrier to make it more useful in either mission would require a
- large expenditure in a world of shrinking defense budgets. While I'm sure that
- the Marines would like a larger, faster, longer-ranged replacement for the
- Harrier, and even the Air Force might want something like that (in spite of the
- Air Force prejudice against anything with an A- designator), I don't think that
- it will happen in the near future.
-
-
- Chad Wemyss
- Worcester Polytechnic Institute
-