Originally Posted by
jolihokistix
Re 'single failure'. Something to be said for the tri-jet engine configuration. Or small outer-rim permanently exposed load-bearing high-tolerance metal wheels (think Thrust/Bloodhound SSC) to obviate/ameliorate both engine strike in case of gear failure.
Anything "exposed" that is capable of absorbing a wheels up landing while protecting the engines is going to have a
huge weight and drag impact - which of course turns into a large fuel burn impact.
There are a lot of things that become doable when costs and fuel burn are not a consideration... Heck, we could go back to fixed gear - that would solve the problem...