Please Read The Fine Manual

Document conventions

Credits and acknowledgments

End User License Agreement (EULA)

Rights and limitations


About Saab 35 Draken



Export versions

About this simulation

Flight dynamics

Limits and restrictions


First startup

Texture resolution


Model and textures


Interior model

Exterior model

Repaint kit

Features and special effects

Options panel




Drop tanks

Drag chute

Contrails and smoke

Chocks and covers

Pilot animations

System description

Cockpit overview

Warning and indicator lights

Hydraulic system

Electrical system

Emergency Power Unit (EPU)

Fuel system


Landing gear

Flight data system

FLI 35 system

PN-594/A navigation radar



Other instruments

Stall warning system

Oxygen system

Radar system


Normal operating procedures

Before starting the engine

Starting the engine

Taxi and takeoff




Final approach and landing

Emergency procedures

Hydraulic system failure


Engine fire


Appendix 1: Prepar3D Commands

Appendix 2: J 35J procedure check lists

Appendix 3: FR28 Radio channels

Appendix 4: PN-594 Navigation channels

Appendix 5: Cockpit glossary

Appendix 6: Technical data

Flight Manual: Saab 35 Draken 5.0Updated: 2019-11-02

Features and special effects

Options panel




Drop tanks

Drag chute

Contrails and smoke

Chocks and covers

Pilot animations

Options panel

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Fig. 21 -  Options panel

The first time you load the aircraft after installation, a panel is displayed where you can enable/disable some optional features. Your choices will be saved between sessions.

The options panel can be accessed anytime from the Views menu.


The exterior engine sounds (including the start-up and shut-down sequences) are based on stereo recordings of a Volvo Flygmotor RM6B engine, a license-built Rolls-Royce Avon 200 series engine used in the 35A/B and in the A 32 Lansen. This engine is identical in sound to the RM6C used in 35J.

The interior engine sounds are a mix of synthesized sounds and the exterior sounds.

Panel switch sounds and warning sounds are mostly synthesized but are similar to the real sounds.

The sound clips used to create the sound effects are either recorded by Bookmark or in the public domain.


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The single-stage EBK-67 afterburner (afterburner) adds approximately 20 kN of thrust to the 57 kN dry thrust of the RM6C (Rolls-Royce Avon 300 Mk. 60) engine.

In the real Draken the afterburner is activated by pushing the throttle past the normal maximum (MIL) position to a spring-loaded stop. In this simulation it must be activated with the Toggle Afterburner command - default key command: Shift-F4.

Please note that the afterburner will not be activated automatically at maximum throttle as in most other add-on aircraft for Prepar3D and Flight Simulator.

The following conditions need to be fulfilled to be able to activate the afterburner:

When the afterburner is activated you will feel a significant thrust boost, and the EBK warning light is lit for a few seconds while the exhaust nozzle eyelids open.

To cut off the afterburner, pull back momentarily on the throttle. The EBK warning light will light up again briefly while the exhaust nozzle closes.

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Fig. 23 -  EBK warning light

The EBK warning light is not an indicator for active afterburner. It only lights up when the exhaust nozzle hydraulics are operated, and on afterburner malfunction.


The canopy is opened with the Select Exit key command (default: Shift-E ). When the canopy is unlocked the canopy warning light HUVLÅS will be lit.

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Fig. 24 -  Canopy open

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Fig. 25 -  Canopy warning light

If the canopy is opened during flight it will detach from the aircraft.

Drop tanks

The J 35J was standard-equipped with two 525-liter external tanks under the fuselage, but could also be fitted with two additional tanks on the two wet outer wing pylons. Wing tanks are not available in this version. See also Fuel system.

The external tanks can be jettisoned with the Drop Tanks 1 key command (you may have to add this key command in Prepar3D). Two successive keystrokes are needed: The first will arm (unlock) the mechanism, the second will release the tanks.

In the real Draken, a toggle switch on the left side of the canopy frame is used to arm either belly or wing tanks for release, and a button (protected by a red plastic membrane) is then pushed to jettison the tanks. The arming switch is not functional in this version, but the button will trigger the Drop Tanks command.

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Fig. 26 -  Tank and canopy jettison switches

A button further back on your left is used to jettison the canopy. Take care not to press that button by mistake (which happened at least once in real life).

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Fig. 27 -  Whoops. Here comes a Saab convertible.

Drag chute

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Fig. 28 -  Landing with drag chute

The drag chute lever and indicator are located on the throttle console. In the simulation the chute is operated with the Increase Flaps Incrementally key command (default: F7 ). The first click will deploy the chute, the second will drop it.

If you deploy the chute accidentally (easy enough as it uses the flaps command) you can actually reset it in the simulation by clicking on the chute indicator.

The drag chute mechanism is completely mechanical and will work without hydraulic and electrical power. The chute lever can only be operated if the throttle is below 90 %.

To prevent damage to the chute cords from the engine exhaust, the chute should be released as soon as ground speed is low enough to use wheel brakes.

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Fig. 29 -  Drag chute controls

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Chute stowed (ready for deployment)

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Chute deployed

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Chute released (dropped)

Contrails and smoke

Engine starter smoke

When the engine is started, yellow smoke from the AVPIN (isopropyl nitrate) starter motor will emanate from a valve underneath the left ram air intake.

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Fig. 30 -  Starter smoke effect

Exhaust heat

A very subtle effect of heated air emanating from the engine exhaust. It will increase with thrust and is only visible on the ground.

This effect can be enabled/disabled from the Options panel.

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Fig. 31 -  Exhaust heat

Exhaust smoke

The RR Avon/RM 6 engines normally do not produce much smoke except on startup and on full throttle. A big smoke trail indicates that fuel is not being completely burnt, usually due to residue or wear in the injection system.

This effect can be enabled/disabled from the Options panel.

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Fig. 32 -  Exhaust smoke


Wingtip contrails and wing condensation may appear with high G load, depending on temperature and relative humidity. A contrail will also appear at high altitude and/or air temperatures below -30 °C.

The high-G vapor effect can be enabled/disabled from the Options panel.

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Fig. 33 -  Condensation effects in a high-G turn

Chocks and covers

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Fig. 34 -  Details visible when parked

When the aircraft is parked and the engine is completely shut down (turbine not spinning), additional details such as the ladder, intake and exhaust covers, wheel chocks, etc. will become visible. They will disappear when the engine is started.

This effect can be enabled/disabled from the Options panel.

Pilot animations

G force effects

The upper body of the pilot moves laterally and longitudinally as G force is applied. The head of the pilot turns with rudder pedal input.

Helmet visor

The helmet visor will be raised when the oxygen valve is closed.

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Fig. 35 -  The helmet visor