Full disclosure I know less than nothing about fabricating so if the following are stupid questions I apologize.

My wife and I have for many years toured on a old linear recumbent tandem. It has died. On a number of occasions we have been thrown off or been denied passage on trains because the bike was too big to fit in the bike car. What is required is a tandem that breaks down EASILY. From an ease of breakdown standpoint the major problem seems to be related to the chain. If one was to use a front wheel drive system say from cruzbike or similar and couple it to the rear portion of any decent tandem it seems to me this would solve many of the breakdown issues.

Am I missing something here?

I know this is not a perfect solution as one now has 2 unicycles and gear to lug through a train station so if anyone has better suggestions please please please let me know.

thank you for your thoughts
K