24. Su-25 Introduction (Part 1)





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Published on Mar 5, 2010

1.Welcome to the first training flight in the Su-25, or Shturmovik in Russian, close air support aircraft. This legendary aircraft earned its renowned reputation in the skies over Afghanistan. Dubbed 'the flying tank' for its heavy armor protection and rugged survivability, the Su-25 is armed with cannon, bombs, unguided rockets and guided air-to-surface missiles to provide support to friendly troops.
2.The Su-25 is powered by two Tumanskiy R-195 non-afterburning turbojet engines that provide a total thrust of up to 9,000 kg., which allows the aircraft to reach speeds of up to 970 km/h at low altitudes and 0.8 Mach at altitude. The maximum range of the Su-25 is 1,250 km/h with a maximum ceiling of 7,000 m.
3.The elevator and rudder control surfaces are directly connected to the cockpit controls through a series of rods and levers. To reduce the amount of stick force experienced by the pilot, spring-loaded servo actuators are installed and aileron control is aided by a hydraulic booster system. The aircraft is quite maneuverable and provides a stable platform for delivery of various types of air-to-surface munitions.
4.To take over control of the aircraft or exit the mission, press the "ESC" key.
5.In this training flight, we'll discuss the Su-25s primary cockpit instruments and learn to use the navigation system to fly along a planned route. A description of the ASP-17 gun sight for combat employment will be discussed in later lessons.
6.Let's take a look at the instrument panel. We'll begin with the 5 primary instruments. The first of these is the Attitude Direction Indicator, or ADI.
7.The ADI, also called the artificial horizon, indicates current bank and pitch angles. The aircraft datum is placed over a vertical pitch scale. The pitch scale rotates up and down under the aircraft datum to indicate the angle of climb or descent relative to the horizon. The aircraft datum will roll left and right to indicate bank angle. Tick marks around the bottom half of the ADI indicate the angle of bank.
8.The ADI also includes pitch and bank directors, which help to maintain the assigned heading and altitude. The yellow horizontal needle is the pitch director and the vertical needle is the bank director.
9.The small, white vertical needle at the top of the ADI is the heading director and the horizontal needle on the left side is the altitude director. By keeping the larger yellow and smaller white directors centered, you can accurately maintain your assigned course and altitude while navigating the flight route.
10.The next instrument is the Horizontal Situation Indicator, or HSI, which represents a top-down view of your aircraft in relation to the flight route. The magnetic compass rose rotates so that the solid white triangle at the top of the instrument will always indicate your current heading.
11.Two needles rotate inside the HSI. The longer needle with a circle at the end will always point to your selected navigation point. The shorter needle will indicate the assigned course heading for that point.
12.The cross in the center of the HSI is used for landing approaches.
13.To the left of the HSI is the Steerpoint Range Indicator. This instrument shows the range in kilometers to the selected navigation point.
14.Next is the Airspeed Indicator, located in the upper left portion of the instrument panel. The outer ring scale represents Indicated Airspeed (IAS) and the inner scale represents True Airspeed (TAS) in 100s of km/h.
15.The last of the 5 primary flight instruments is the Vertical Velocity Indicator (VVI), which includes a turn and slip indicator.
16.The last of the 5 primary flight instruments is the Vertical Velocity Indicator (VVI), which includes a turn and slip indicator.
17.The turn indicator is the vertical needle and is marked for 1 - 3 degrees/sec to the left and right. The black ball is the slip indicator and is used to coordinate turns by keeping it centered in the tube.
18.The Mach Indicator is located to the right of the VVI. This is a good time to remember that the Su-25 is limited to Mach 0.85.
19.On the left side of the instrument panel is the combined Angle of Attack (AoA) and G Indicator.
20.The angle of attack and G scales include marks for maximum allowed limits.
21.Below the Barometric Altimeter is the Radar Altimeter, which is functional from 0 to 1,500 m.
22.Below the Mach Indicator is the engine RPM indicator. The instrument is marked from 0 to 100%, where 100% is full engine power. The left engine is represented by the needle marked '1' and the right engine is by the needle marked '2'.
23.To the left of the RPM Indicator and below the VVI is the clock. You can start and reset the second-hand by pressing RSHIFT-C.
24.Below the engine RPM indicator are two temperature gauges that show the engine exhaust temperature (EGT) in degrees Celsius for each engine.
25.on the video and on the web lockon.co.uk

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