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 TFX | by Digital Image Design

TFX: by Digital Image Design

HUD (Heads Up Display) from TXX, 1993


Landing is a challenge for any new pilot. There is nothing so embarrassing as downing eight MiGs, reducing an enemy runway to rubble and then spreading the debris of your fighter across the length of your own airfield. In TFX, you can always select the auto land feature, but there is no better way to end a mission than a proper manual landing.

First find an airfield. Activate the Instrument Landing System (ILS) HUD mode. If there is a friendly runway nearby you will be given the runway direction and heading. Approach from the correct direction and check your speed. As you near the runway, it should be near the aircraft's stated landing speed (150 knots for the F- 117A, about 30 knots slower for the other aircraft). If your speed is too high, try to slow down by reducing engine rpm, and activating air brakes. Your glide path should be around seven degrees descending. You can tell if your glide angle is right by looking at the horizontal bar on the HUD, the Glide Slope Deviation (GSD) bar. When it is in the center, your glide angle is correct. The vertical bar is called the Localizer Deviation (LD) bar, and measures your offset from the middle of the runway.

To the right hand side of the HUD is the Angle of Attack indexer: two arrows around a circle.

If your Angle of Attack (AoA) is too high, the top arrow ('caret') will be lit. Increase your speed.

If your AoA is too low, the bottom caret will be lit. Decrease your speed.

If your AoA is correct, the middle circle will be lit.

If your glide slope is correct, but your AoA is not, then your speed is wrong.

When you make any necessary adjustments, your glide slope indicator may go off-center. You must now readjust your pitch angle with the joystick (or mouse, or keys) to re-center it. This is a continuous process of adjusting glide slope angle and AoA until you get it right.

As your speed falls below 180 knots, lower your landing gear. The drag from your gear will reduce your speed a little. As you slow down and increase your angle of attack, you will notice that speed decreases still further, as a result of AoA. It may actually be necessary to increase thrust again just to maintain your new, lower speed. Do not worry about increasing even to 80 or 90 per cent military power to stay airborne. Be careful though: if you lower your nose, you will speed up again. If any of your indicators read badly, if airspeed or altitude is too high as you near the runway, do not attempt to land. Throttle up and fly over the runway, turn around and head back a few miles in the opposite direction, then turn back and try again.

If all goes well, you should arrive at around 50 ft altitude near the start of the runway. Pull back to decrease your glide slope, and watch your VSI. As you touch down, it should read less than 5 ft/s downwards. Increase thrust if necessary to keep speed up as you touch down. When you touch the ground, the ground light to the left-hand side of the HUD should come on. Reduce thrust, and apply your wheel brakes. If you are in a Stealth Fighter, deploy your brake parachute now. Reduce rpm to minimum. Soon, as speed falls, the NW nose wheel steering light left of the HUD will come on. Now use the joystick (or mouse, or the 'left arrow' and 'right arrow' keys) to steer left or right and keep on the runway.

When your speed reaches zero, turn off both engines. You can now end the mission. "

From the manual