Configurable settings¶
Everything on this page is set on the Config tab in the "Twotter" EFB app.
The default settings are either sim defaults or they enable convenience features. The non-default settings strive to be more realistic, and might end up being more annoying.
Profiles¶
The profile buttons at the top of the Config tab reset most of your settings to one of these:
- Classic: the original Aerosoft experience. Convenience features on, realism features off, full TAWS with the Aerosoft sound bank, stock-faithful GNS.
- Recommended: what I fly. Realistic battery, generators, gyros and parking brake, with the GNS and HSI convenience features kept.
- Realistic: All realism options are on. Every convenience beyond the real KAP-140, GNS 530W and KI-525A is switched off.
Pressing a button asks whether to apply the profile to this variant only or fleet-wide. If your settings match none of the three, the tab reports the profile as Custom.
| Option | Classic | Recommended | Realistic |
|---|---|---|---|
| Relaxed NAV arming | on | on | off |
| Flight director bars | on | off | off |
| GNS visual approaches | off | on | off |
| Coupled VNAV descent | off | on | off |
| Historic NDBs | off | on | off |
| Gyros take time to spin up | off | on | on |
| Automatic fast-erect | on | off | off |
| OBS auto-slew | on | on | off |
| ADF card slaving | on | on | off |
| TAWS installation | Full | Reduced | Legal minimum |
| Realistic battery capacity | off | on | on |
| Generators can trip | off | on | on |
| Instructional mode | limited | ||
| Optional KAP-140 voice callouts | off | on | |
| TAWS callout voice | Aerosoft | Custom | Custom |
| TAWS callout volume | -3 dB | -3 dB |
The gaps are intentional.
Some options are in no profile at all, they're strictly personal preference or depend on your hardware: Realistic parking brake, FDR switch as avionics master, Copilot callouts, Sealed lead-acid battery, Random passenger weights, Reliability, Power lever axis anchor, and Airborne idle detent.
Options¶
Some options have a "This Aircraft" / "All Aircraft" pill: when it says "All Aircraft", the setting is shared across all variants that don't override it; set it to "This Aircraft" and that variant keeps its own value, independent of the rest. This is intended to allow you individualize the aircraft variants you fly.
All other options are fleet-wide.
Avionics¶
| Option | What turning it on does |
|---|---|
| FDR switch as avionics master | Repurposes the unused Flight Data Recorder switch as an avionics master for the aftermarket stack: GNS 530/430, KAP-140, transponder, ADF and audio panel. Round gauges are unaffected.DHC6_CFG_FDR_AS_AVIONICS_MASTER |
| Relaxed NAV arming | Lets the KAP-140 pre-arm NAV before the course is in range. Off, NAV is rejected until in range.DHC6_CFG_AP_STRICT_NAVARM |
| Flight director bars | Shows the flight director command bars on the attitude indicator.DHC6_CFG_DISABLE_FD |
| GNS visual approaches | Offers the Garmin per-runway VISUAL approaches. The real 530W/430W has none, so off is stock-faithful.DHC6_CFG_DISABLE_GNS_VISUAL_APPR |
| Coupled VNAV descent | Lets the autopilot fly a coupled VNAV (PATH) descent. Off leaves the advisory-only VNAV the real 530W has.DHC6_CFG_DISABLE_GNS_COUPLED_VNAV |
| Historic NDBs | Adds historic NDB beacons that modern navdata has dropped. These take precedence, and the sim's navdata is used only for beacons the historic set doesn't have.DHC6_CFG_NDB_SOURCE |
Bug
A change to the GNS VNAV option only takes effect when the GNS starts up. Currently, this needs you to start (or restart) a flight. A power cycle will most likely not do.
Instruments¶
| Option | What turning it on does |
|---|---|
| Gyros take time to spin up | Gyros spool up from rest instead of coming up aligned, which takes a couple of minutes from cold. Pull to Erect shortens the time the horizon needs to settle. The HSI can be synced to the whiskey compass from the EFB Instruments tab.DHC6_CFG_REAL_GYROS |
| Automatic fast-erect | The attitude indicator pulls its own fast-erect knob during cold-and-dark erection. Off, pull it yourself.DHC6_CFG_DISABLE_AUTO_FAST_ERECT |
| OBS auto-slew | The HSI course pointer rotates itself to the active GPS leg. Off, set the course yourself.DHC6_CFG_DISABLE_OBS_AUTO_SLEW |
| ADF card slaving | The ADF compass card follows the HSI heading. Off turns a KI-227-01 into a KI-227-00 you set by hand.DHC6_CFG_DISABLE_ADF_CARD_SLAVE |
Automatic fast-erect only means anything with realistic spin-up on, so the tab greys it out when Gyros take time to spin up is off. It keeps its stored value while greyed.
Systems¶
| Option | What turning it on does |
|---|---|
| TAWS installation | Full (default) — Class A on every aircraft, the full callout set. Reduced — passenger variants get Class A, cargo and utility get Class B. Legal minimum — passenger variants get Class A, everything else gets nothing. Class B — no terrain, glideslope or bank-angle alerts anywhere. Off — all callouts muted.DHC6_CFG_GPWS |
| Realistic battery capacity | Gives the battery a real amp-hour budget that the enabled consumers draw down. Off means unlimited capacity. If you flatten it, change the chemistry or set the source switch to EXT to summon a GPU cart.DHC6_CFG_REALISTIC_BATTERY |
| Sealed lead-acid battery | Swaps the standard NiCad pack for a sealed lead-acid one: different chemistry, more capacity, more weight.DHC6_CFG_BATTERY_SLA |
| Generators can trip | Generators have a small chance to trip when they come online. The annunciator will stay illuminated. A tripped generator stays off until you RESET it: hold the GEN switch to RESET, release to ON.DHC6_CFG_GCU_LATCH |
The SLA pack weighs 20 lb more, and that weight is added to the aircraft as soon as you select it.
Wear & Tear¶
| Option | Positions |
|---|---|
| Reliability | Off (default) — the wear and tear system is disabled and the Maintenance tab is hidden. Reliable — nominal wear rate, experienced mechanic, risk-averse management. Unreliable — 4× wear. Not Airworthy — 16× wear, an inexperienced mechanic and poor access to new parts.DHC6_CFG_RELIABILITY |
Reliability is stored per airframe out of the box, so each variant ages on its own unless you uncheck its override.
Note
Wear & Tear & Damage is work in progess, and only few systems have been hooked up to it.
EFB app¶
| Option | What turning it on does |
|---|---|
| Instructional mode | Show internals that are usually not available to the pilot.DHC6_CFG_DISCLOSURE |
| Default crew weight | What one crew member weighs when the Payload tab seats them.DHC6_CREW_WEIGHT_DEFAULT |
| Default pax weight | What one passenger weighs when the cabin is loaded from the Payload tab.DHC6_PAX_WEIGHT_DEFAULT |
| Random passenger weights | Each passenger weight is rolled individually.DHC6_CFG_PAX_RANDOM_WEIGHT |
Audio¶
| Option | What turning it on does |
|---|---|
| Optional KAP-140 voice callouts | Adds the unit's three optional spoken messages: "Altitude" 1000 ft before the preselect, "Leaving altitude" 200 ft after departing it, and "Autopilot" on disconnect. They accompany the tones rather than replacing them. The two standard trim messages are always on either way.DHC6_CFG_KAP140_VOICE |
| Copilot callouts | The copilot speaks the checklist responses. Same setting as the Checklist tab's Mute button.DHC6_CFG_COPILOT_MUTE |
| TAWS callout voice | Aerosoft (default), FlyByWire, CustomDHC6_CFG_GPWS_AUDIOBANK |
| TAWS callout volume | You know how a volume slider works.DHC6_CFG_GPWS_VOLUME |
This is the same setting as the Mute (loudspeaker) button in the Checklist tab.
Volume applies to the FlyByWire and Custom banks only. The Aerosoft bank ignores it.
Note
Letting go of the Volume slider plays a callout so you can hear the level. It picks one at random from the full set, which includes "Pull up" and "Terrain ahead, pull up". Pro tip: Don't change the volume while airborne.
Hardware¶
| Option | What turning it on does |
|---|---|
| Realistic parking brake | Models the real DHC-6 sequence: fully depress both toe brakes, pull the lever, release the toe brakes. If the latch doesn't catch, the handle snaps back and you try again.DHC6_CFG_REALISTIC_PARKING_BRAKE |
| Power lever axis anchor | Where the low end of your throttle axis lands. Idle detent (default): the axis ends at the idle detent. Zero thrust: the axis ends at the zero-thrust point. Full beta: the whole quadrant, for hardware with its own detent.DHC6_CFG_PWR_LVR_ANCHOR |
| Airborne idle detent | Airborne, your throttle axis stops at the idle detent instead of the anchor point.DHC6_CFG_PWR_LVR_AIR_DETENT |
Reviewed 2026-09-06.