Construction instead of production

For those wondering about the lack of progress in construction over the past few months, here is the explanation:

No aircraft construction project progresses without setbacks. Especially not a project where some details need to be developed before they can be built. One such detail is currently requiring a lot of effort and time: By modifying the rear fuselage from the original metal construction to a continuous wooden structure, the attachment of the vertical stabilizer also needs to be adjusted. First, the forces of the vertical stabilizer on the fuselage structure were quantified in a study by Jürg Müller (Aerodynamics RUAG Aerospace). The values turned out to be significantly high, making the introduction of forces into the fuselage a challenge.

Under the guidance of Stefan Bräutigam (Structural Engineer RUAG Aerospace), the construction was redesigned to ensure that the strength of the wood is sufficient to absorb the forces. Calculations alone were not enough. Tensile tests were necessary to ensure that the screw connection in the wood could withstand the forces. A total of 27 tensile tests were conducted at the Technical University of Windisch until failure.
With this data, the calculations were then carried out under the uncompromising supervision of Stefan Bräutigam and documented in a 23-page statement.