Hi Tilney,
I have and use the very Saab 35 Draken you downloaded, version 4.1 and it has afterburner. You will not get it to ignite by jamming your throttle to the end. You will need to activate it using (Shift + F4). The packaged .pdf manual states this on page 25. I QUOTE:
The single-stage EBK-67 afterburner (reheater) adds approximately 20kN of thrust to the
57kN 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 is activated with
the Toggle Afterburner command (Shift-F4). Please note that it will not be activated
automatically at full throttle as in most other FSX jet fighters.
The following conditions need to be fulfilled to be able to activate the afterburner:
• Engine speed above 90 %
• Afterburner fuel valve open
• Remaining total fuel above 5 %
• AC power available (alternator bus on)
When the afterburner is activated you will feel a notable thrust boost, and the EBK warning
light is lit for a few seconds while the exhaust nozzle “eyelids†open. As in the real world,
the afterburner makes no difference in the sound of the engine.
To cut off the afterburner, pull back momentarily on the throttle. The warning light will light
up again briefly while the exhaust nozzle closes.
UNQUOTE
Hope this helps,
Best wishes.
Khalid