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Seyer Brother`s Diabolo

Review of Seyer brother`s Diabolo – In mid-70s, as a child, Thorsten Seyer learned under the guidance of his big brother Bernd how to control model aircraft. The initial spark came during a demonstration flight by the then world-famous aerobatic pilot Wolfgang Dallach.

The Seyer’s had tasted blood. Since then, the Seyer brothers have been involved in aerobatics ever since. With the emergence of the F3A-X scene in Germany, participation in the F3A and F3A-X competition classes also began.


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In the course of the following 20 years, several podium places were achieved. Inspired by well-known pilots from the scene, the Seyer’s designed their own model aircraft. For example, the Seyer Diabolo with a 2.50 m wingspan and approx. 8 kg flying weight.

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In 1983 I got to know the Seyer brothers at our F3AX competition in Tübingen.

Together with Dietrich Altenkirch and a few other Wolfsburg pilots they were at the very start with their models.

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Dietrich with his beautiful CAP20, the Seyer`s with their Diabolos.

Dietrich Altenkirch 1983

The Diabolos built fascinatingly flight models. With a wingspan of 2,50 the planes weighed only 8 kg.

The Diabolos flew perfectly.


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During the 80s the first Seyer Props were built. These propellers were very quickly used by F3AX competition pilots – the propellers were the guarantee for an enormous power boost despite lower aircraft noise.

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This was followed by the Seyer tuned pipes and other model aircraft such as the now legendary Seyer CAP 231.

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The range of propellers was and is constantly being expanded, many performance-oriented competition pilots successfully used these propellers in their competitions.

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The propellers were also often flown by hobby pilots, and Seyer propellers are still used in drones in the German military today.

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Unfortunately, Bernd Seyer died too early in the 90s and we had lost a good friend.

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Wolfgang Dallach, †2015

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