I have a standard Rover with a Nexus-i8 which I love, despite wishing I had a lower low gear, and a higher high gear. There are many reasons why I have long wanted a tandem recumbent trike (TRT). One reason is I figured it would be easier for two riders to move a tandem along than it would be for those same two riders to each move along a trike of their own. This has been questioned by both TRT riders and those who haven't ridden a TRT but do ride a recumbent trike. But I don't understand the logic in it. What is wrong with my thinking?
So, here is my current thinking - A Rover Tandem i8 weighs 70# and has 3 wheels, and 2 riders. So, in our case (wife & I), that's 370#, plus seat bag, lights, horn, lock, & tools ~ 10#, for a total weight of 380#. If we are each in our own Rover i8, we have 47# trikes, and we would each want seat bag & accessories, so another 10# each, we now have a total of 484# to move up and over the same hills plus we now have to move a total of 6 wheels up those same hills, rather than 3 with a tandem. More wheels and more weight both require more energy.
So, can someone please explain to me why riding a recumbent tandem trike over a given moderate terrain, is harder than, each of those same riders, riding a trike over that same terrain?