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hawker111

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Posts posted by hawker111


  1. 10 minutes ago, baffmeister said:

    "To further complicate matters, most of the older flight manuals mention the hazards of 'rolling G',  which can substantially reduce the safety factor when pulling high G's, . . ."

    Excellent point Baffmeister. I have also heard that this is true. But you don't think this is modelled in SF?
     


  2. 2 hours ago, Caesar said:

    I don't think you can model something that specific.  If memory serves, you can damage or set your engines on fire if the fuselage section is considered "damaged" or "destroyed" by the overstress, but that's about as far as it goes.

    Thanks for the reply Caesar.

    So in your opinion, having the engines damaged or having them go on fire would be a good way to model engine mount failure due to over-G?
     



  3. What exactly causes a fighter aircraft to sustain high G turns at higher airspeeds?

    For example, let's say you have a jet fighter than can sustain, say, 7 Gs at 500 knots, but if the fighter started the 7 G turn at, say, 425 knots it would not be able to sustain the 7 G turn, but would bleed its airspeed down. What exactly causes the fighter to sustain the 7 G turn at the higher airspeed?

    Is it:

    1) A lower AOA at the higher airspeed
    2) At the higher airspeed a jet engine produces greater thrust
    3) A combination of both 1 and 2

    Thanks,

    hawker111


  4.  

    Here is a drawing of the vertical maneuvering egg:

    blob.png.499209834b2d51dfe3b62c97a60e0a5a.png

    My question is, even if a fighter did not loose a G going up, and gain a G going down, wouldn't the vertical turn still be egg shaped? Because the fighter will loose airspeed going up, reducing Gs, and gain airspeed going down, gaining Gs.

    Thanks,

    hawker111

     


  5.  

    As an example, let's say two F-105D Thunderchiefs are flying together. The first is clean, and has an empty internal bomb bay, and only 2,000 lbs of internal fuel. The second F-105 is clean also, but has a full internal bomb bay and an almost full internal fuel load.

    Will the first F-105 be able to both accelerate faster and attain a higher maximum level flight airspeed than the second?

    Thanks,

    hawker111

     

     

     


  6.  

    In this film Doug, an F-4 pilot, says that an F-4 pilot must learn to roll the aircraft using two different techniques. One for low AOA, and one for high AOA. He says that when you have low AOA you can roll the aircraft in the conventional way, pushing the control stick left or right and rolling with ailerons. But Doug says that if you want to roll at high AOA you must keep the stick centered and use your rudder to roll the aircraft. If you use aileron to roll at high AOA the aircraft will suffer adverse yaw. So if you push the stick left to roll left, the fighter will yaw right, and will roll in the direction of the yaw.

    Here is the film (9:30 -11:05):
     

     

    What F-4 Phantom flight model best simulates adverse yaw at high AOA?

    And, did all of the Century Series fighters suffer from adverse yaw at high AOA?

    Thanks,

    hawker111

     

    • Thanks 1

  7.  

    Here is a link to a film that features the F-86 Dog Sabre:


    The Sabre pilot takes off and climbs to 30,000 feet (7:43). He runs out of oxygen (8:23) and has to dive down to a lower altitude.

    At 9:24-9:30 the pilot says: "Better watch that fuel though*. This can is really gulpin' it down at this altitude."

    Later on the pilot is running low on fuel. At 13:35-13:41 the pilot says: "If I just had some oxygen I could have stayed at altitude and cut down my fuel consumption."

    My question is, if the Sabre is cruising at 30,000 feet, its engine will consume less fuel at that altitude than at a lower altitude with the same throttle setting?

    Thanks,

    hawker111

    * or does he say: "Better watch that fuel load."
     



  8. Streakeagle,

    Thank you very much. I really enjoyed reading all that you wrote.

    I would like to ask you a question about something you had wrote:

    "For instance, t-tail aircraft like the F-104 and even the F-4 have control/stability issues caused by the wings disturbing the airflow to the horizontal stab/elevator at high AoA."

    Could you explain exactly what happens when the F-104 and F-4 exceed a certain angle of attack? I know that the F-101 Voodoo had a "pitch up" problem. Here is a film:
     

     

    Thanks,

    hawker111

     

     

     

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