On Monday, January 27, 2020 at 11:20:34 PM UTC-5, wrote:
The engineering and installation should be relatively simple.

Um, not on this planet.

"Designing an airplane is easy, if you don't know how."

Very nice Mark!
For those of you who don't know the reference, here's the source:

https://evtol.news/wp-content/upload...xpo-2019-5.pdf

(slide 27)

Amusing to see him hold it up next to the Lilienthal quote (which I've also seen more often in slightly different version and attributed to others): "To invent an aircraft is nothing. To build one is something. To fly is everything."

A recent example: https://www.forbes.com/sites/jeremyb.../#646fe858ab40