If you’ve been following the Just Flight F70 and F100 Professional, you’ll know that meaningful updates have been few and far between over the past several months. This week, Just Flight broke that silence with a substantial development update, and the developer is upfront about why things have taken longer than expected.
In short: the VNAV system had to be rebuilt from scratch.
The VNAV rewrite
Just Flight says that towards the end of last year, the team made the decision to scrap their first implementation of the vertical navigation system and rewrite the logic entirely. The developer admits this was a difficult call and one that cost more time than anticipated, but says the rewrite was necessary because they weren’t satisfied with the first incarnation.
According to this weeks’ dev update, this is the first time Just Flight has developed an aircraft with a fully autopilot-coupled VNAV system, and the decision to start over allowed them to carry forward all the learnings from the first attempt into a stronger foundation, one that the developer says will be easier to refine and improve over the lifetime of the product.
The rewrite is nearing completion, with internal testing ramping up significantly. Just Flight says the team is logging more flight hours in the aircraft than ever before, which is usually a good sign that a product is entering its final validation phase.
What else has been built in the meantime
While the avionics work has been ongoing, other parts of the team have continued developing additional features, and several of these represent firsts for Just Flight products.
The EFB tablet now includes a Performance Calculator app, built using data from real-world manuals. It takes inputs including runway length, surface condition, aircraft systems state, and weather conditions, and outputs takeoff and landing distances, FLEX and TOGA thrust settings, and trim settings. Runway selection and takeoff weight can be imported directly from the aircraft or from a SimBrief OFP, and live weather data can also be pulled in. The map app has also been expanded with additional provider options and now supports displaying the SimBrief flight plan overlay directly.
The cabin simulation has also received considerable attention. Just Flight describes the Auto Cabin Crew system in the F70 and F100 as the most comprehensive they have included in any product to date, covering pilot callouts across all phases of flight, and cockpit-to-cabin and cabin-to-cockpit interactions. A digital music player, modeled on the Becker unit visible in the forward galley in the screenshots, can be operated manually or controlled automatically by the simulated cabin crew, who will play music during boarding and deboarding. A long press of the mode button switches the unit into Announcement mode, where 13 included announcements can be played manually or triggered automatically at the appropriate flight phases.
Just Flight says the combination of music, welcome announcements, and a safety briefing during pushback creates what they describe as a notably immersive boarding experience. Volume also adjusts depending on cockpit door position.
The sound set across both aircraft is now complete, with over 500 sounds included in each product. Just Flight says a dedicated sound overview video is planned ahead of release.
FlightSim Weekend demo
Perhaps the most tangible signal that release is approaching is the fact that Just Flight will be at FlightSim Weekend 2026 in Lelystad this weekend, at Booth 31 in the Navigraph Hall, with advanced builds of both the F70 and F100 available for attendees to fly.
No release date has been announced, but between the VNAV rewrite nearing completion, the feature set described in this update, and the public demo this weekend, it is reasonable to expect that a release window announcement is not too far off. We will keep an eye on it!
