[jharger]

What about a chain of airships?

[gumby]

I’ve never seen one and I would think they would be hard to stabilize, somthey’s Need engines...in which case just let them fly alone.

[objektif]

What abiut multiple airplanes flying close to each other.

[gumby]

Technically I suppose they are in train, like a column os soldiers, sure, but I think by ‘train’ in this context the idea was the one in front pulls the others. The closes you could get with flying in formation would be drafting in a V as birds do — quite dangerous for planes! (Consider the XB-70). Wingtip coupling isn’t “in train” plus has always been fatal