wrote in message
snip

What drawbacks, aside from the folding wings and the fact that the
engine is no longermanufactured, are you aware of?

Seems to me like those are reason enough 8-).... I also had quite
an interest in this design years ago and recently saw the example
which is now hanging in the Smithsonian (very slick, BTW)... but
regarding the reference to "folding wings" - it's my understanding
that they only fold up *once* - always in midair - and only if they
don't outright disintegrate first!!!

That part kind of put me off. YMMV...8-)

Bill