Wouldn't be he first prototype they've written off but then they ~ like us ~ are in good company, the evolution of aviation having been one of trial-and-error. Along with Bell, Boeing and Joby ~ whose prototypes each suffered similar fates along the way ~ Vertical benefits from investment more easily expressed in billions of dollars than in millions; although such investment is a monkey on your back, 'due diligence' requiring all such reversals to be declared.
