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Heads-Up Display Modes 35 - Metaboli

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Primary Flight School 113<br />

Alternatively, some pilots live by the motto, “Aimpoint, airspeed.” In other words,<br />

using the velocity vector or visual steering, point the aircraft such that it is heading<br />

for the end of the runway (the aimpoint). Next, adjust airspeed to the appropriate<br />

landing speed. By maintaining both attributes, the aircraft will follow a proper<br />

approach.<br />

Always use the proper speed to maintain the correct AOA during final<br />

approach. The following table provides an estimation of the speed required for<br />

empty aircraft:<br />

Aircraft (Clean) Final Approach Speed Touchdown Speed<br />

Su-25 280 km/h 210 km/h<br />

Su-27 300 km/h 250 km/h<br />

MiG-29A 280 km/h 2<strong>35</strong> km/h<br />

F-15 125 knots 115 knots<br />

A-10 120 knots 110 knots<br />

hIf flaps are unavailable, increase speed by 10 knots or 15 km/h. If<br />

carrying significant fuel or stores, increase approach speed as necessary<br />

to maintain correct AOA.<br />

Always steer to land the aircraft with the nose wheel directly on the runway<br />

centerline. As the saying goes, “The centerline is for pilots. The rest of the runway<br />

is for passengers.”<br />

9.003 Instrument Landing System (ILS)<br />

Both Russian and U.S. aircraft use the same Instrument Landing System (ILS). The<br />

ILS uses two needles to guide the aircraft down the proper approach trajectory,<br />

called the glide path. The horizontal glideslope deviation bar shows the desired<br />

altitude. The vertical, localizer deviation bar shows the desired heading. When the<br />

needles are centered, the aircraft is flying the correct glide path. If the aircraft is off<br />

course, the needles drift outwards. Always fly toward the needles; if the localizer<br />

bar drifts to the right, turn right. If the glideslope bar drops, descend.<br />

The ILS System

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