With my current pipe dream being to get physically involved in aviation instead of only theoretically, I looked into the regulations for ultralight planes in Germany.

On multiple occasions in the LTF-UL regulation it is mentioned that in special cases the design inspection authority "Musterprüfstelle" needs to approve the aircraft.

This and the fact that most articles about building your own UL are referring to using existing design patterns "Muster" makes me wonder if it is even possible/feasible to design your own UL aircraft.

So the question is split into two parts:

  1. Is it possible to legally design, build and fly your UL in Germany (complying with LTF-UL)?

  2. Is it feasible to design, build and fly your UL in regards to the financial and time-killing aspect of the bureaucracy in contrast to using an existing design pattern?

  • $\begingroup$ Not an answer, but you might be more interested in experimental than ultralight aircraft. Have you considered that venue? $\endgroup$ – a CVn Aug 26 at 8:41
  • $\begingroup$ @aCVn That of course would be more fitting but to my research I couldn't find an "experimental aircraft" class in the German regulations. I only know of "motorisierte Luftsportgeräte" (motorized aviation sports equipment, MTOW <600kg). $\endgroup$ – GittingGud Aug 26 at 8:50
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    $\begingroup$ I'm not familiar with German regulations specifically; a separate question asking whether German regulations have provisions for experimental aircraft in general, and what the relevant regulations would be in that case, might not be unreasonable. That would allow this question to focus specifically on UL aircraft. $\endgroup$ – a CVn Aug 26 at 9:18
  • $\begingroup$ @aCVn I asked the question about experimental aircraft regulation in Germany $\endgroup$ – GittingGud Aug 26 at 11:29

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