il2

La-5 ser.8

Description

Indicated stall speed in flight configuration: 165..183 km/h
Indicated stall speed in takeoff/landing configuration: 147..162 km/h
Dive speed limit: 720 km/h
Maximum load factor: 10 G
Stall angle of attack in flight configuration: 22.7 °
Stall angle of attack in landing configuration: 15.1 °

Maximum true air speed at sea level, engine mode - Boosted: 550 km/h
Maximum true air speed at 3000 m, engine mode - Boosted: 575 km/h
Maximum true air speed at 6200 m, engine mode - Nominal: 595 km/h

Service ceiling: 9700 m
Climb rate at sea level: 19 m/s
Climb rate at 3000 m: 14.0 m/s
Climb rate at 6000 m: 8.8 m/s

Maximum performance turn at sea level: 21.7 s, at 290 km/h IAS.
Maximum performance turn at 3000 m: 32.0 s, at 300 km/h IAS.

Flight endurance at 3000 m: 1.9 h, at 350 km/h IAS.

Takeoff speed: 170..200 km/h
Glideslope speed: 200..210 km/h
Landing speed: 150..160 km/h
Landing angle: 13 °

Note 1: the data provided is for international standard atmosphere (ISA).
Note 2: flight performance ranges are given for possible aircraft mass ranges.
Note 3: maximum speeds, climb rates and turn times are given for standard aircraft mass.
Note 4: climb rates and turn times are given for Boosted power.

Engine:
Model: M-82
Maximum power in Boosted mode at sea level: 1700 HP
Maximum power in Nominal mode at sea level: 1400 HP
Maximum power in Nominal mode at 2100 m: 1550 HP
Maximum power in Nominal mode at 5300 m: 1335 HP

Engine modes:
Nominal (unlimited time): 2400 RPM, 950 mm Hg
Boosted power (up to 5 minutes): 2400 RPM, 1140 mm Hg

Oil rated temperature in engine output: 55..90 °C
Oil maximum temperature in engine output: 125 °C
Cylinder head rated temperature: 140..210 °C
Cylinder head maximum temperature: 250 °C

Supercharger gear shift altitude: 3500 m

Empty weight: 2648 kg
Minimum weight (no ammo, 10% fuel): 2928 kg
Standard weight: 3353 kg
Maximum takeoff weight: 3593 kg
Fuel load: 370 kg / 521 l
Useful load: 945 kg

Forward-firing armament:
2 x 20mm gun “SsVAK”, 170 rounds, 800 rounds per minute, synchronized

Bombs:
2 x 50 kg general purpose bombs “FAB-50sv”
2 x 104 kg general purpose bombs “FAB-100M”

Length: 8.672 m
Wingspan: 9.8 m
Wing surface: 17.51 m²

Combat debut: September 1942

Operation features:

• The engine has a boost mode. To set boost mode it is necessary to push the boost knob and increase manifold pressure to 1140 mm Hg.
• The boost control is effectively a limiter. It limits the pressure to 950 mm Hg in normal mode and to 1140 mm Hg in the boost mode.
• The engine has a two-stage mechanical supercharger which must be manually switched at 3500m altitude.
• Engine mixture control is automatic when the mixture lever is set to maximum. It is possible to manually lean the mixture by moving the mixture control to less than maximum. This also reduces fuel consumption during flight.
• Engine RPM has an automatic governor and it is maintained at the required RPM corresponding to the governor control lever position. The governor automatically controls the propeller pitch to maintain the required RPM.
• Oil radiator, air cooling intake and outlet shutters are manually controlled.
• Air cooling intake shutters should always be open. They should only be closed when there is a possibility of engine overcooling, for example in a dive with idle throttle.
• The aircraft has trimmers for all flight-controls: pitch, roll and yaw.
• The aircraft has automatic wing slats. They deploy when the high angle of attack increases which makes pre-stall softer.
• Landing flaps have a hydraulic actuator and they can be extended to any angle up to 60°.
• The aircraft tailwheel rotates freely and does not have a lock. For this reason, it is necessary to confidently and accurately operate the rudder pedals during the takeoff and landing.
• The aircraft has differential pneumatic wheel brakes with shared control lever. This means that if the brake lever is held and the rudder pedal the opposite wheel brake is gradually released causing the plane to swing to one side or the other.
• The aircraft has a fuel gauge which shows total remaining fuel.
• Cockpit canopy has a weak lock when in the opened position, for this reason the canopy may spontaneously close in a deep dive. Also, it is impossible to open or close canopy at high speed due to strong airflow. The canopy has no emergency release, so bail out requires the speed drop before it.
• The control system for the bomb rack only allows to drop the two bombs at the same time.

Basic data and recommended positions of the aircraft controls:

1. Starting the engine:
   • recommended position of the mixture control lever: auto mixture control
   • recommended position of the cowls flap control handles: open
   • recommended position of the oil radiator flap control handle: close
   • recommended position of the prop pitch control handle: 100%
   • recommended position of the throttle lever: 5%
2. Recommended mixture control lever positions for various flight modes: auto mixture control

3.1 Recommended positions of cowl flaps for various flight modes:
- takeoff: open
- climb: open
- cruise flight: open (in winter conditions - close 50% if necessary)
- combat: open

3.2 Recommended positions of cowl flaps for various flight modes:
- takeoff: open 100%
- climb: open 100%
- cruise flight: open 20% (in winter conditions - close if necessary)
- combat: open 60%

3.3 Recommended positions of the oil radiator control handle for various flight modes:
- takeoff: open 50%
- climb: open 100%
- cruise flight: open 20% (in winter conditions - close if necessary)
- combat: open 50%

1. Approximate fuel consumption at 2000 m altitude:
   • Cruise engine mode: 9.7 l/min
   • Combat engine mode: 11.1 l/min

Modifications

2 x FAB-50sv bombs
2 x 50 kg General Purpose Bombs FAB-50sv
Additional mass: 120 kg
Ammunition mass: 100 kg
Racks mass: 20 kg
Estimated speed loss before drop: 20 km/h
Estimated speed loss after drop: 12 km/h

RPK-10
Fixed loop radio compass for navigation with radio beacons
Additional mass: 10 kg
Estimated speed loss: 0 km/h

Special Guns Ammo Load
Loadout variants: armour piercing (AP) or high-explosive (HE) rounds only

2 x FAB-100M bombs
2 x 104 kg General Purpose Bombs FAB-100M
Additional mass: 228 kg
Ammunition mass: 208 kg
Racks mass: 20 kg
Estimated speed loss before drop: 27 km/h
Estimated speed loss after drop: 12 km/h

M-82F engine
Late M-82F engine modification with unlimited boosted mode duration.
Additional mass: 0 kg
Estimated speed loss: 0 km/h

Flat Windscreen
Flat frontal section for better visibility
Additional mass: 2 kg
Estimated speed loss: 2 km/h