What we know about major Williams setback with 2026 car:
https://www.the-race.com/formula-1/williams-missing-first-f1-2026-test-setback-what-we-know/
"... Though there was speculation that Williams's chassis is not ready, The Race understands this is not the case and it has passed everything required.
That does not preclude that process taking longer than expected, though, either because of a failed crash test or a problem identified by Williams itself. Either will potentially have added weeks of development and manufacturing work to rectify the situation.
Williams switched its design focus to 2026 extremely early and had intended to sign off the first version of the car early too, to make sure it avoided exactly this situation. With that in mind it cannot just be poor planning or improper tools, and it's understood to not be a result of a supplier or production issue. It must relate to a core architecture design - like the monocoque or suspension - needing reinforcement in some way and Williams wanting to find a way to make its intended designs work as it chases performance with the car.
...
In an attempt to mitigate the setback, Williams is planning a comprehensive virtual track test programme in place of going to Barcelona.
This involves being able to run the real car and engine in a controlled environment but it is more relevant and detailed than normal dyno testing. The chassis, engine and gearbox will be hooked up and be put through specific, more intense programmes. This will involve a detailed runplan and it's understood Williams will do this over multiple days starting this weekend.
Williams has completed a fire-up in the factory, so the car and engine are in a state where they can run quite extensively on a rig. But it clearly implies the team has completed the fundamentals of the build too late to be able to complete the necessary validation work before running anything on-track. Whether an adjacent simulator programme will take place is unknown but this would not really offer anything that its existing sim work has not already provided. ..."
