The de Havilland Canada DHC-6 Twin Otter has carried passengers and cargo into short, rough and remote strips around the world since the 1960s, from Antarctic research stations to Caribbean island hops. In Microsoft Flight Simulator, Aerosoft’s Twin Otter has been a well-liked version of the aircraft for years. The community project 🔆 Twotter Revived, created by aurel42, is turning it into a much deeper simulation. The free mod was first published about seven months ago and has now reached version 0.5.36, released on November 9. The update is large and touches nearly every part of the aircraft.
Twotter Revived is much more than a livery pack or a small tweak. It replaces large parts of the original aircraft’s systems with custom code. At its core is a new simulation of the PT6A-27 engine, along with a rebuilt flight model and new fuel, electrical, hydraulic and brake systems. The propellers now have autofeather, beta and reverse ranges, and a power lever interlock. On the avionics side, the mod includes a GNS 530/430 ported from CCM’s Crazy Completionist Mod, a KAP 140 autopilot, a KR 87 ADF, a KT 76C transponder and EGPWS/TAWS. There is also a historic NDB database and a custom radio propagation model, which make old-school navigation more convincing. You can adjust much of the setup through a dedicated Twin Otter app on the EFB, which handles configuration, checklists and persistence.
Version 0.5.36 has a long list of changes. The walkaround experience is one of the most visible. Doors and baggage handles are now clickable, you can move the control surfaces by hand, and the crew door swings with the wind and during taxi turns. MSFS 2024 pilot and co-pilot avatars now sit in the cockpit, and the passenger variants carry passengers in the cabin. The compass and gyro systems have more depth as well. They gain a flux valve, gyro drift and optional spin-up times, so a cold start takes a little more patience.
The KT 76C transponder has a new gauge with a warm-up time, a default VFR code of 1200 and an indication when radar interrogates it. The GNS 530/430 gets many more of the pages ported from CCM’s work, plus user waypoints, a terrain alert system and a series of fixes. Flight model work in this release covers drag, stall speeds, flaps, elevator and rudder, and the maximum operating speed now sits at 156 or 166 KIAS depending on the variant. The engines and propellers were reworked too. Torque has been rescaled, a reverse governor added and autofeather fixed, and the -300 variant now governs at 96 percent NP. The KAP 140 and the EGPWS callouts have been refined, and many instrument, lighting, cockpit and checklist issues have been fixed.
If you fly with dedicated hardware, the update adds FSUIPC7 presets and new throttle options. The EFB has new Config pages for equipment, lighting and hardware. The profile system has changed in this version, so you should open the Config tab after installing and pick your profile again. Optional camera packs are included, but you should install only one of them. A small tool called fix-twotter-livery.exe also comes with the mod to help with liveries.
Installation takes a little more work than dropping a folder into Community. The mod needs an unmodified install of the Aerosoft Twin Otter, version 1.1.1, because its installer reads the original files to build the mod. First, remove any older versions of the mod from your Community folder, especially old camera mods and the old propblur mod. Then unpack the archive, open the charliebravo-aircraftmod-twin-otter folder and run install.bat or install.ps1. When the script asks, point it to your Twin Otter folder. The mod stays inactive until the script has run. This release also fixes installer problems with long file paths and desktop.ini files. If installation still fails, the author recommends starting from a fresh copy of the Aerosoft aircraft before reporting the problem. If you own Black Square’s Turbine Duke, you can also install an optional sound mod from the companion_mods folder. The author notes that it may cause sound issues and asks to hear about them.
The community response has been very positive so far. The mod has around 4,000 downloads and a perfect 5.0 rating from 31 reviews on Flightsim.to. If you already own the Aerosoft Twin Otter, Twotter Revived is a good reason to fly it again. It is free, and it reflects many hours of work on systems, avionics and flight dynamics. If you enjoy it, consider donating to aurel42 or supporting the project in another way to help development continue: Download the 🔆 Twotter Revived on Flightsim.to.
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