I posted the Early Access Build 20170630 of Disputed Space. This build includes two big changes:
1) New Cockpit and HUD
2) New Manual Afterburner to replace the automatic Afterburner
The afterburner is currently set to Tab on the keyboard, left stick pressed on game controller, and button 5 on a HOTAS throttle device. These defaults may change in the future.
There is an orange bar to show how much energy is available for the Afterburner feature. When engaged, the Afterburner will disable strafing and reverse. The Afterburner gives a big speed boost forward for the player.