SamDim Design

AN-24RV aircraft

Flight Instructions

Attention: metric system. 100 kts = 185 km/h. 1000 ft = 328 m. 10 miles = 18.5 km

Regimes for engine AI-24:

Taxiing

Disengage the parking brake, the slowly advance the power levers until UPRT is around 30%. Once the plane starts moving cut back the power to around UPRT 20-25% for a taxi speed 30 km/h (16 kts).

Take-off and climbing

Flaps to 15° (third position).

Arm the brakes, turn propeller lock ON and raise the throttle briefly to 40%. Then raise to 100% and release the brakes (press ".").  Start to raise the plane at ~200 km/h, take off should be at ~220-250 km/h (depending on the weight). Keep the pitch approximately 8-9°. (max 10 deg.). After take off  retract the gear. Above 250 km/h and minimum 120m above ground altitude (AGL) raise the flaps. After raising the flaps, use trimm and throttle to keep the climbing rate constant and the speed at 300 km/h (162 kts). At about 400m AGL reduce UPRT 65% (nominal), and set pitch for a stable 300 km/h climbing. Climb rate will be as follows:

Cruising

Economic cruising mode is UPRT 52% (0.85 nominal). The best economical flight altitude is about 5000 m (16400 ft).

Descending

Descending mode is UPRT 20-30%. The alarm horn will be on below 38%. If bothers (I guess yes), turn ЗВУК - sound alarms switch OFF on the Engineer's panel. No speed brakes, so pay attention of speed.

Descend by approximately 350-360 km/h (180-185 kts) IAS and 5 to 10 m/s (900 to 1800 ft/min) of descend rate.  Keep 300 km/h (162 kts) on downwind and base legs.

The critical speed for descending is 540 km/h (290 kts) to avoid structure deformation.

Landing

Keep speed 300 km/h (162 kts) on pattern. On the downwind leg, extend the gear. On the base leg deploy the flaps to 15° and reduce speed to 250 km/h (130 kts). Before the final approach deploy the landing lights and the flaps to 38°. Keep speed approximately 200-210 km/h (108-110 kts) on the final approach. Before the touchdown reduce UPRT around 12-15%, and after touchdown UPRT 0%. Disengage (turn off) "propeller lock". Propeller blade angle will drop and that will create a rather strong back thrust (and noise). The brakes can be used below speed 150 km/h (81 kts) only.

Critical parameters

Maximal speed on descend: 540 km/h (290 kts)

Maximal speed to deploy the gear: 300 km/h (162 kts)

Maximal speed to deploy the flaps to 15°: 300 km/h (162 kts)

Maximal speed to deploy the flaps to 38°: 250 km/h (135 kts)

Maximal flight altitude:  8 400 m (26 800 ft)

Maximal side-speed of wind: 12 m/c (22 kts)

Take off distance: about 900 m (2950 ft)

Landing distance: about 600 m (2000 ft)

Fuel calculation

(unit: 1 lbs = 0.4536 kg)

Fuel consumption during cruising at altitude 6000 m (FL197): 705 kg/h (1550 lbs/h)

Fuel for taxi to line up and climbing to FL197 and descending from FL197, approach and taxi to full stop:  600 kg (1323 lbs)

Note that climb to FL197 and descend from FL197 takes approximately 200 km.

Example: calculate necessary fuel for distance 750 km at altitude 6000 m and cruising speed 460 km/h GS.

1. Estimate distance for cruising flight: 750 km - 200 km = 550 km
2. Estimate duration of cruising at final flight level: 550/460 = 1.2 h
3. Fuel needed for cruising flight: 705 kg/h * 1.2 h = 846 kg
4. Total fuel needed for flight: 600 kg + 846 kg = 1446 kg
5. Take 500 kg of reserve fuel (depends on alternate airport distance)

Grand total: 1446 kg + 500 kg = 1946 kg