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#21
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What the F-15 does have is a stability augmentation system.
http://www.globalsecurity.org/milita...raft/f-15e.htm The first production fly-by-wire aircraft was the F-16. Concord actually. They even wanted to put sidearm controllers on it. F-16 was the first with a DIGITAL FBW. I think Corcorde, and possibly F-111 too had analog systems. Ron PA-31T Cheyenne II Maharashtra Weather Modification Program Pune, India |
#23
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"Steven P. McNicoll" ) writes:
"Ed Rasimus" wrote in message ... First, lets note that a Piper Cub (usually a J-3) is one thing and a Cessna 172 is another. Actually, I think you'll find a Piper Cub is always a J-3. Wasn't there a J-5 version as well? -- "Cave ab homine unius libri" |
#24
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This led me to go find my F-15A-1, circa 1975. Level flight, 0 bank,
military thrust, gear & flaps down, sea level stall speed (defined as 30 deg AOA) was about 100 KIAS. Final approach speed under those conditions was 143 KIAS. So, assuming the numbers haven't changed much for the F-15C/D, staying with a 110-120 KIAS Cessna would be sporty, but doable. Jim Thomas Emilio. Its actuallly about a C-172 getting intercepted, about a 110 knot airplane. Still pretty slow though. Guess we would need one of the eagle drivers to chime in... Ron PA-31T Cheyenne II Maharashtra Weather Modification Program Pune, India |
#25
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Your comment about Airbus is quite out... The fact you are speaking about is coming from a direct mistake of a pilot stupid enough to execute a non planned demo, with passengers on board, over an un prepared field... And this aircraft is not a fighter... |
#26
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That particular case was a 172. F-16s were evidently dispatched to intercept me while I was bring a Cub home on 9/11. Happily I was on the ground before they located me. www.pipercubforum.com/defcon.htm Which is what sparked my interest in the matter. I hope you hear from an F-15/F-16 driver who has been obliged to make such an interception. all the best -- Dan Ford email: (put Cubdriver in subject line) The Warbird's Forum www.warbirdforum.com The Piper Cub Forum www.pipercubforum.com Viva Bush! weblog www.vivabush.org |
#27
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On Tue, 29 Jun 2004 10:19:45 -0600, Ed Rasimus
wrote: The J-3 would be cruising at 65-75 MPH In my case, 60 knots on the nose. Makes the chart work a breeze (The wind tends to spoil things, however. I never know how much until I put a GPS on the front seat-back.) all the best -- Dan Ford email: (put Cubdriver in subject line) The Warbird's Forum www.warbirdforum.com The Piper Cub Forum www.pipercubforum.com Viva Bush! weblog www.vivabush.org |
#28
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On 29 Jun 2004 19:45:36 GMT, (B2431) wrote:
What tripped my BS alarm was the C-172's pilot's first hint he wasn't alone was the "smell of burning paint." Unless the guy was stone deaf would he not have heard the F-15 if it were close enough to smell? I'm am not saying the event didn't occur, just not the way it was written. That's the pilot talking, not the reporter. Personally, I read the Aero-News Propwash every morning and find it at least as informative as this newsgroup, and the opinions probably less biased. all the best -- Dan Ford email: (put Cubdriver in subject line) The Warbird's Forum www.warbirdforum.com The Piper Cub Forum www.pipercubforum.com Viva Bush! weblog www.vivabush.org |
#29
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"Bill Shatzer" wrote in message ... Wasn't there a J-5 version as well? The J-5 was the "Cub Cruiser". |
#30
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"Peter Stickney" wrote in message ... In article , (Eunometic) writes: Alan Dicey wrote in message ... Emilio wrote: Do F-15 fly by wire system prevent the aircraft from stalling at that low speed? Last time I saw an aircraft with fly by wire system did such a stunt, Airbus plowed right in to the forest at the end of the forest! The F15 does not have what avionics people think of as fly-by-wire. In fly-by-wire the control surfaces are moved by the computer alone, which integrates control inputs (pilots suggestions) with the aircrafts position in the flight envelope (the sensed environment). In fly-by-wire there is no mechanical connection between the pilot and the control surfaces. The F-15 has hydromechanical connections between the pilots controls and the ailerons, stabilators and rudders. What the F-15 does have is a stability augmentation system. http://www.globalsecurity.org/milita...raft/f-15e.htm The first production fly-by-wire aircraft was the F-16. Concord actually. They even wanted to put sidearm controllers on it. F-111, actually. And, perhaps the A-5 Vigilante, depending on how you want to define FBW. This is a cut and paste job. However I suspect we could go back to before even 1956. A few quotes from the relevant chapter from Bill Gunston's book "Avionics": The author was privileged to have flown in about 1956 in the world's first FBW aircraft, the Tay-engined Viscount 663 which had been bailed to Boulton Paul to support the Valiant bomber programme. Through primitive, the system was true pioneering. The right-hand seat was 'all electric', with wiper potentiometers transmitting pilot demands along dual electrical channels (I believe one used 28V DC and the other, basically identical, used 110V AC), with a feedback potentiometer at each powered surface. [snip] In 1962 the basic design of Concorde was settled, one of the Anglo-French choices being to use fully powered elevons and rudder with electrical signalling. (Further it is added the the jet inlet control system is also FBW.) [snip] In 1972 the United States got into the act, most notably with the NACA F-8C Crusader, which in May 1972 made the first FBW flight without mechanical reversion. This aircraft had simplex digital control, the first wholly non-analog aircraft in the world, the standby system being triplex analog. [snip] These encouraging results confirmed Panavia in their much earlier (1968) choice if triplex analog for Tornado, and, apart from Concorde, this was the first production FBW aircraft in the world. [snip] FBW links feed the computerised outputs to the tailerons, spoilers and rudder, with mechanical reversion for the tailerons only. [snip] Tornado first flew in 1974, and the same year saw the first flight of the General Dynamics YF-16. [snip] Its FBW system was the first in the world to have no reversionary system whatever. |
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