Not over-unity at all. Walking and running are just very inefficient ways of moving around. You can't coast when walking or running -- coasting takes the invention of the wheel. When you coast down a hill on a bike, you are only expending baseline calories. When you walk down a hill, you are expending more. Same thing for riding easily on the flat and coasting half of the time.I don't want to derail this thread now that it's back on track, but I want to explain one thing. My reasoning about efficiency of walking vs biking is that for the latter to be more efficient a bicycle would have to be an over-unity device; you would get out more than you put in.
There are lots of things that go into the quantitative numbers that I linked to previously in this thread, and the bottom line is that bicycling is much more efficient than walking or running. Credit the wheel and gearing for most of that.You can coast only after building up momentum through physical effort. Likewise for going downhill; you have to have first pedaled up the hill. Are you honestly proposing that a bike not only has no frictional and other losses, but in fact offers gains instead?
Think of hydroelectricity. Do the turbogenerators at the base of Niagara Falls produce more power than the harnessed part of the falls themselves? Not likely. It's a lot more convenient after conversion, as is bicycle travel, but there's still a loss.
Then focus on the "efficiency" of the animal feed lol, or maybe more specifically on the efficiency of the animal to turn feed into food :tongue2:The actual reason I think about this is to resurrect..... horse and cow farming around the world. To have green energy and preserve friendly animal relationship
Greeting. This is my first thread in engineering zone. Pleased to meet you all
As the topic said. I want to ask about how possible to make animal powered vehicle for animal
Or simply said, can we create bicycle for animal?
I just think that, Human walk is low efficient compare to bicycle. Even bicycle add weight into overall system. Using bicycle is faster and consume less energy than running
So, can we give animal the same kind of system? Some wheels connected to gear and.... Pedal? Threadmill? whatever. Anything and everything that can boost harness power efficiency and lower fatigue of animal
I want to find some way to let human able to use animal powered engine instead of fuel. But just using direct drafting like the old day is not enough anymore. Boosting efficiency with mechanical engineering is my hope
Do you have any idea?
Comparing your first post above to your latest post, you did not make it clear in your first post what your goal was. If it's improving the efficiency of using animals in farming, that is very different from increasing their efficiency for human transportation. If you had made your purpose clear from the start, much of the wasted effort of posters in this thread could have been avoided.And you should put manure into efficiency. Oil or gas fuel was more problem in transport than animal feed. Harness animal eat hay and grass then make a material for generate methane gas. When they died they also give you bone and skin for use
Efficiency for the feed cost is no need to talk about. It the same reason people use bicycle for transportation. To convert energy from food eating yesterday into distance and speed more efficient than walking
The reason I start this thread is because I already know that using harness animal in the same way as old day is less efficient than oil machine
And now I try to find new way to increase efficiency of using harness animal. To convert energy from feed that animal eating yesterday into more work than drafting. So we can use harness animal in the field work again without dropping of productivity that's my purpose
I doubt it would be very efficient if you account for having to feed and care for the animal. They are not a "free" source of power. But you would have to do an actual calculation of the cost of maintaining the animal, and figure out the amount of useful work (energy) the animal can produce. Then compare that to the cost and work output of existing farm equipment.I think to train animal to use is not problem at all. What I really want is the design that would be sure easy and comfortable for the animal (it would be effect to training too) and about efficiency that should be useful as much as possible
"Green" seems to be ill-defined, or may be an inappropriate criterion here. The animals would still produce greenhouse gases, and you need to compare that to the amount of gases produced by existing engines.The actual reason I think about this is to resurrect buffalo farming of my homeland. Also horse and cow farming around the world. To have green energy and preserve friendly animal relationship
But to do that. Efficiency is very crucial to benefit people who tame them