Member Virgil Payne had a design on here many years ago . I think it involved having the corridors on opposite sides. I.e The bed was above the low level corridor on the top level . the sleepers also overlapped longitudinally,in a manner similar to slumbercoachs.
Moderator worldwide railfan , Rail travel & trip reports
The only train trips I regret are the ones I didn't take.
The only train trips I regret are the ones I didn't take.