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Swedish Flight Simulator Adds G Forces

jonerik writes "According to this article in Aviation Week and Space Technology, Sweden's Dynamic Flight Simulator (DFS) is believed to be the first flight simulator which actually allows fighter pilots to experience G forces under simulated conditions. Designed and built by California-based Wyle Laboratories, the DFS is essentially a flight simulator capsule (in this case for Sweden's JAS 39 Gripen fighter) located at the end of a 30-foot centrifuge arm. 'We wanted to give pilots the ability to "fly" and interact with the environment rather than just be a passive [centrifuge] rider,' said Will Roberts, program manager for Wyle Laboratories' DFS programs. 'We've come a long way in being able to translate the six degrees-of-freedom you get in an aircraft into the three degrees-of-freedom that we can control in a centrifuge. It's not perfect, but we think it's pretty good. There's room for more research to make it even better.'"

15 of 268 comments (clear)

  1. 1,900-kw Motor by Taboo · · Score: 5, Funny

    ...the use of a smaller drive motor. Wyle chose a 1,900-kw. Westinghouse DC motor originally designed for steel mill applications, connected directly to the centrifuge-arm drive system. It delivers about 7 megawatts of peak power in approximately 100 millisec

    If that's smaller, what was the bigger one??

    1. Re:1,900-kw Motor by sharkey · · Score: 5, Funny
      about 7 megawatts of peak power...If that's smaller, what was the bigger one??

      1.21 jiggawatts at precisely 88mph.

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  2. Possible alternative by swordboy · · Score: 4, Interesting

    They should give this thing a try. Looks fun. They brought it to Detroit once and I was going to ride on it until someone puked all over.

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  3. Great work, but why? by soluzar22 · · Score: 4, Insightful

    That's a real step forward in a technological sort of a way, but why? Have we had a problem with poor standards in fighter pilot training in recent years? I have to admit that if either the US or anywhere else, including my beloved UK has had this problem I had not heard.
    Seems like a lot of effort for not too much reward to me but what do I know?

    1. Re:Great work, but why? by alexatrit · · Score: 4, Informative

      No poor standards as far as we know (specifically), but the US has always made a point to make advances in training. Early on there were the T-38 trainers. Eventually the Navy started the whole TOP GUN program. The Air Force has it's advanced facilities out in Dreamland. Much of the military training programs were started to meet a specific goal, but some were simply because the advance was possible.

      If you can effectively train a pilot to handle the effects of G-forces in a cockpit-like environment before sending them up in a multi-million dollar (and potentially classified) plane (with added liability, potential for damage), moreso the better.

      It's also interesting that this is getting investigated from a security perspective, as the possibility of foreign nationals being trained inside our our jets becomes a larger concern. Publicity on longer "grounded" training could discourage moles/spies from enrolling in the programs, knowing in advance that they wouldn't be granted access to real equipment.

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  4. next up! by Horny+Smurf · · Score: 4, Funny

    Any chance they'll make a sex simulator with a simulated G-spot?

  5. Enlighten me... by ghettoboy22 · · Score: 5, Interesting

    What is it exactly that the Swedish use these fighters for? Don't get me wrong... I think every country should be entitled to a proper defence force, but are these planes simply sitting on the ground, or are they getting some use? It's some pretty impressive technology the Sweeds have, so one would hope they're actually putting it to use. I'm just thinking that I can't recall hearing in recent memory of a Swedish border conflict, or a Swedish peace-keeping force. Is there anyone out there more familiar with Swedish military history that could enlighten us /.'ers?

    1. Re:Enlighten me... by wfberg · · Score: 4, Informative

      What is it exactly that the Swedish use these fighters for? [..] I'm just thinking that I can't recall hearing in recent memory of a Swedish border conflict, or a Swedish peace-keeping force.

      That's because there weren't any. They're that good.

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    2. Re:Enlighten me... by Wyatt+Earp · · Score: 5, Informative

      Sweden was a big power back in the 15th-17th centuries, then the rise of Russia stole thier thunder.

      In the Second World War they got really spooked by the Russian invasion of Finland and ramped up thier aviation industry by licensing German designs, then British designs and tossing that in with home-grown technology while making a profit from selling raw materials and arms to both sides.

      In the Cold War Sweden took a slightly pro-western approach but was openly neutral, and thats when thier aerospace industry really took off.

      They had a series of 3 great fighters from the 50s to the 80s with the J35A Draken, J32B Lansen and JA37 Viggen.

      During the Post-War/Cold-War era the Swedes also bought American and British aircraft, araments and technology.

      The current fighter the Swedes are building is the Gripen, there have been foriegn sales - Switzerland and South Africa IIRC and Saab Aerospace has been bought by British Aerospace recently.

      The Gripen is less "home-grown" that previous Swedish fighters

      Flight control system, product series 1, Lear Astronics, USA
      Flight control system, product series 2, Martin Marietta, USA
      Basic engine F404, General Electric, USA
      Air conditioning control, Hymatic Engineering,UK
      Landing gear, AP Precision Hydraulics,UK
      APU and engine start aggregator, Microturbo, France
      Emergency power and transfer, Lucas Aerospace, UK
      Inertia navigation, Honeywell, USA
      Cannon, Mauser-Werke, Germany
      Ejection seat, Martin Baker, UK
      Main generator, Sundstrand, USA
      Hydraulic system and transfer, Dowty, UK
      Brakes, Aircraft Breaking Systems, USA
      Fuel system, Intertechnique, France
      Sidewinder AIM-9 AAM, USA
      AMRAAM AIM-120 AAM, USA

      http://www.sci.fi/~fta/sweden4.htm

    3. Re:Enlighten me... by hpa · · Score: 4, Informative

      Sweden takes part of peace-keeping missions all the time, mostly under U.N. flag, but they also have troops in Kosovo; I believe in the British sector.

      Although it may not be that recent, Sweden did have a long-standing maritime border conflict with the USSR, during which Soviet MiG fighters would violate Swedish airspace on a regular basis. JAS 39 Gripen was designed in part to make sure that the RSAF would be able to outfly the Soviets. A little obsolete right now, though, especially since those areas are now the Baltic countries with which Sweden has excellent relations.

      The end of the Cold War definitely has put the role of the traditional Swedish military in question. The threat of an invasion is currently zero, and the only realistic way that could change would be a major and very sudden change in Russia. This is also true of NATO; I personally suspect that we'll see a major realignment of the role of NATO, the EU defence force (WEU), and the neutral countries (Sweden, Finland, Austria and Ireland) within the next decade.

  6. ASDD by SparkMan · · Score: 5, Interesting

    I used to work for Wyle in San Antonio where they had a forerunner to the DFS called the ASDD (Advanced Spatial Disorientation Demonstrator). It was basically a cockpit the could rotate like a gryoscope and was mounted on a large, rotating motion base arm.

    You can see the cockpit here:

    http://safety.kirtland.af.mil/magazine/htdocs/ma rm ag97/mar15.htm

    Look behind the visible screens (which make up the simulated flight control tower). The fun part is inside the round cockpit behind the glass. That part spins around to produce up to about 3 G's. You can't see in this picture but the cockpit rotates around like a 30 foot circle once it gets going, plus it spins around it's own center.

    See also:

    http://safety.kirtland.af.mil/magazine/htdocs/ma rm ag97/mar1005.htm

    Older technology, but still cool. In that lab we used to study how different kinds of motion would fool the inner ear. Such as, a pilot who is taking off and who looks over his shoulder at the ground will experience a balance illusion that will throw off his perception of "down". If he is not trained to compensate, and is distracted by other circumstances, this illusion can easy cause him to bank the plane into a crash.

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  7. Sweedish suburbs? by halo8 · · Score: 4, Funny

    From the link about the plane.. scroll down
    is it just me or is that not a house in the background

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    1. Re:Sweedish suburbs? by mabu · · Score: 4, Funny

      There's a really nice deaf couple that lives there that cannot understand why they got such a great deal on their new property.

    2. Re:Sweedish suburbs? by Rxke · · Score: 4, Interesting

      Part of their (smart) thinking: if the major airstrips get bombed, they have literally thousands of places where they widened stretches of 'normal' roads, so they can land, take off there, there are also numerous hidden hangars and maintenance stuff. Idea is that an enemy would never come around to bomb *all* these stretches, most are 'fake'

    3. Re:Sweedish suburbs? by October_30th · · Score: 5, Insightful
      That's not a mistake.

      Both Finns and Swedes (don't know about the Norwegians) design national highways so that parts of them can be used as runways - improves the dispersion of the planes.

      That was actually one of the quoted reasons why Finland opted for the Navy version of F-18s: it won't break down if you bring it down hard on a short, bumpy runway.

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