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- Newsgroups: sci.space
- Path: sparky!uunet!cs.utexas.edu!sun-barr!ames!news.dfrf.nasa.gov!shafer
- From: shafer@rigel.dfrf.nasa.gov (Mary Shafer)
- Subject: Re: Aurora chase planes (was Re: Aurora)
- In-Reply-To: pyron@skndiv.dseg.ti.com's message of Wed, 23 Dec 1992 19:42:05 GMT
- Message-ID: <SHAFER.92Dec23221311@ra.dfrf.nasa.gov>
- Sender: news@news.dfrf.nasa.gov (Usenet news)
- Organization: NASA Dryden, Edwards, Cal.
- References: <Bzo1Fv.MD0.1@cs.cmu.edu> <SHAFER.92Dec22074730@rigel.dfrf.nasa.gov>
- <1h8beqINN9hv@news.cerf.net> <1992Dec23.194205.17821@mksol.dseg.ti.com>
- Distribution: sci
- Date: Thu, 24 Dec 1992 06:13:15 GMT
- Lines: 73
-
- On Wed, 23 Dec 1992 19:42:05 GMT, pyron@skndiv.dseg.ti.com (Dillon Pyron) said:
-
-
- Dillon> In article <1h8beqINN9hv@news.cerf.net>, davsmith@nic.cerf.net (David Smith) writes:
- >
- >I think people are getting a little too hung up on the "chase" word.
- >If I recall right, what started this was that an observer said he
- >saw this unidentified plane being chased by an F-15 or F-16. As
- >an observer, how can you tell if one plane is "chasing" another or
- >accompanying it? (Mary's definition of "chase plane" is the standard
- >one for testing aircraft but we're really talking about an "accompanying
- >plane") Unless there was some major manuevering going on you can't say
- >that the F-15 was "chasing" or attempting to intercept with the intent
- >of shooting it down or identifying an unknown plane rather than accompanying
- >it as a "chase plane".
-
- Dillon> If I saw one aircraft, armed or not, I would feel safe to assume it to be a
- Dillon> "companion" plane. If I saw two, armed to the teeth, one behind and slightly
- Dillon> below, the other off center, above and further behind ... The Air Force guys I
- Dillon> grew up with call that "snakes and pistols". ie Sidewinders and guns.
-
- Dillon> If you were to see only one "chase" aircraft, it is probably just that. Most
- Dillon> air forces (includes USN) prefer to fly in wing pairs.
-
- Dillon> Not that I speak with any real athority. Mary, does this seem like a plausible
- Dillon> explanation (although not complete).
-
- We do sometimes fly more than one chase. This is usually during the
- handoff from one chase to another. An example here is the AFTI/F-111
- which would go to the tanker a couple of times during a three-hour
- research flight, while we sortied three chases, each good for a little
- over an hour. Why didn't we use just one chase and have it refuel,
- you ask? Because T-38s don't have refueling capability and F-18s need
- a different tanker than the F-111. (The only thing the Air Force and
- the Navy agree on is that the Army shouldn't have fast jets.)
-
- Let me agree specifically with you about armed-up airplanes--one never
- chases with weapons. It makes the research pilots nervous. Actually,
- this is because weapons are draggy. Except for the missiles on
- wingtips on the F-16 and F-18, and those will be dummies when flying
- safety chase. Remember that flight test, including the chasing, is
- only done by test organizations; operational squadrons (the people who
- routinely fly with weapons) are only rarely involved. Dryden, for
- example, has absolutely no weapons. Rarely, we'll borrow some dummy
- missiles if their presence is germane to a phenomenon that we wish
- to observe (some sort of flow anomaly comes to mind) but we don't have
- cannon.
-
- By the way, chase should fly off to the side, usually behind and below
- the research plane. The chase has to be far enough away that it won't
- interfere with the flow over the research plane, so being behind it,
- in very loose formation (several spans away). There's a classic story
- floating around about some plane that had fantastic performance with
- one chase pilot and average performance with all others; the one pilot
- was flying too close, "pushing" the other plane with his bow wave.
- (There are also stories about doing performance points in mountain
- waves, but this is the wrong newsgroup for them.) Chase pilots are
- test pilots, trained in how to fly chase. Dryden has six test pilots,
- all of whom fly both research and chase flights.
-
- I might also add that the movie "Topgun", while excellent in its way,
- trades authenticity in formation flight for cinematic excitement. The
- usual battle spread that one goes into aerial combat with is up to
- about a mile. Obviously, two aircraft a mile apart are not going to
- be very interesting, even on a _wide_ screen. For this reason, the
- choice was made to tighten the formation greatly, resulting in some
- _great_ photo footage. But don't be fooled, fighters don't go into
- the furball in tight formation.
-
- --
- Mary Shafer DoD #0362 KotFR NASA Dryden Flight Research Facility, Edwards, CA
- shafer@rigel.dfrf.nasa.gov Of course I don't speak for NASA
- "A MiG at your six is better than no MiG at all." Unknown US fighter pilot
-