My beloved 2001 Litespeed Tuscany and my 2014 Cannondale SuperSix EVO Hi-Mod Team bike
OK, I'll bite. What are you talking about?
When the spirits are low, when the day appears dark, when work becomes monotonous, when hope hardly seems worth having, just mount a bicycle and go out for a spin down the road, without thought on anything but the ride you are taking. — Arthur Conan Doyle
This sounds like a 4 wheel HPV powered by both arms and legs. I dont think you will get more continuous power than using just the legs, because of the limit in the rate of taking oxygen into the blood. That oxygen intake rate will more or less match the power output of the legs. Using power from both arms and legs (and even by blinking the eyelids and nodding the head etc) might give higher performance for short bursts. The additional drive system components and 4 wheels will up the weight significantly. If you have thought a way around all this I would like to see.