As I said I didn't expect you to change your plans. I just wanted to do the picture. I think the best application would be a pedal powered vehicle that would be like a recumbent trike when it's stretched out and a wheelchair when it's folded up.
I found 'CRX HF reverse trike project'. That's an interesting project. I don't know how I missed the thread, I try to keep an eye on Ecomodding Central. I especially like the 'Zoleco'. I also see useful discussion on the underbody
So here's a trike:
It's from
Concept cars and trucks: Railbike vehicle model by Chris Binnett