Wow! Just about as complex as it could get. Extremely impressive to keep that below 50kg too. I would think the cranking and tilting and steering is simply asking too much of a two armed rider especially whilst also leg pedalling too. I'd think the effort would be exhausting and soon uncomfortable with no part of the body in any at rest pose. A lot of moving parts there and quite a number of control cables so relatively high maintenance. I note at the end the author suggests quite a bit of simplification such as removal of all the leg and arm drive train and use of hub motors and a pedalled generator (undoubtedly a legal issue or at least a grey area in many countries).
A massively impressive proof of concept prototype. The designer / builder has aimed high and largely hit the mark but like the author appears to allude to it would seem to overload the rider with too many tasks to do. I suspect that once beyond the shortest of rides actually enjoying the experience would prove elusive.
IMHO arms and feet power are to much in one machine ?
Your calves can take all the oxygen you can process [ biggest muscles in body ] so arms if used are only taking that away from the calves.
The excuse if your legs get tired is false , if your legs are that tired it is time for a break with a overload of caffeine and sugar about 20 minutes usually does it , then fresh for the next 50 miles
I had toyed with the idea of a delta with slightly [ free ] castoring rear wheels a bit like a spin cycle but with 20" wheels all around ?
maybe restrict them to a 20' arc either side of straight ahead ?
Well it would stop inaccuracies in the rear frame creating toe in or toe out at the back ?
Should allow a tighter turning circle ? important in an urban environment.
However what little trike time I have could be better spent making rear suspension or a better front end me thinks.