Even upon re-reading it I’m not picking up where this is in the paper;- the reports author uses a Lilium business address so would seem to be a Lilium employee.
that's what happens when you skip to the technical portion of the paper!
Now that you pointed it out i see it. I only saw the university affiliations at a first glance and missed the Lilium employee. Instead i took the caption in figure 1 - " All data is based on estimates from company data in the public domain"- to mean there was no proprietary information being used.
edit: looking at the list of authors under the title, as i said above, i hadn't paid much attention.
But now that i've taken a good look at it i must say it's odd. Indeed, the author is a Lilium employee and the other five names are
not authors but "
reviewers". It's like the whole point of this paper was to get academia experts to agree on Lilium's claims. They must have been tired of being questioned and also needed to allay investor's fears. I wonder how successful they will be. AvWeek has been reporting their claims without questioning them too much, so i'm guessing they will be at least partly successful.
As far as I'm concerned, having someone whose name is preceded by a "Dr." or "Prof" isn't good enough. You can cherry pick sympathetic reviewers or simply people who have not spent the last eight years designing these types of vehicles. A lot of what goes into the design of UAM eVTOL vehicles is subtle, with a lot of second order effects that have to be taken into consideration. People in Academia who specialize in, say, hydrogen powered airliners, or some other unrelated vehicle type, are not going to be relevant.
Also curious that none of the reviewers are from TU Munich, the
Alma Mater of the founders. TUM is known for its aircraft design expertise.
I can tell you just about every UAM company must have reverse-engineered Lilium's vehicle as part of the normal competitor analysis. Granted, Lilium pivoted to a slightly different mission type (long-range regional), but no other company has felt the need to copy any part of their design.
Who knows, maybe in five years i'll be eating crow. Right now i feel like this is just another misleading and likely successful attempt to keep the money grab going.