I've been keep thinking of making and riding this kind of vehicle since I was 6 years old. Well, I've read many articles and discussions about this idea on many websites then. So, this idea is not originally mine. I guess it's Leonardo Da Vinci's. Unfortunately, I can't find a real one yet, except toys for kids.
If this time I started seriously trying to make it happen, one
of the reasons was because I saw the need for an efficient alternative vehicles
as well as environmentally friendly is increasingly urgent. But this time
I do not want to do it for hobby only. Neither is based on the ideals of
saving the Earth from the threat of fuel crisis, or creating a masterpiece of
21st century innovation. I just wanted to see the farmers or small traders
have their own means of transport that can carry more payload, driving more
comfortable, less tiring, pollution-free and economical. A Jakarta
governor ever suggested that the rickshaw is a vehicle that is less human, so
he tried to abolishing it. While the rickshaw drivers, rickshaw is the
only means of earning a living, and for the users of its services rickshaws are
a convenient and inexpensive facility. But almost never actually heard the
comment that the rickshaw is a vehicle that is environmentally friendly and
healthy. not it would be helpful if available a means of conveyance that
functions like a rickshaw, does not use fuel so that it remains environmentally
friendly, safe and comfortable ride, which travels faster, but more humane? Less
interesting? What about the beach buggy? You know, a small car
without a roof with a capacity of 2 people to explore s beach's sand. But that
is lighter and still can drag and roll! You can race racing against your friends while improving your
cardiovascular health, or just relaxing by the beach with your spouse. Or, if
you are a businessman who is looking for new investment outlets, you can have 10-20 units and then rent it to tourists; you will get a hefty intake every day!
I have no formal educational background in engineering, but I
love the mechanics. So pardon me if my description of this idea is too simple. I
would hope you would help me with the correct calculation if you can. Because my
focus is to make a real and functioning, rather than theorizing.
Even so, I'll try to
describe it as clearly as possible as I can. I hope the description is useful
for the student who may wish to examine this idea, because I saw that this
concept can be peeled from the many-point studies. For example, in terms
of physics, mechanics, electro-mechanics, ergonomics, product design, economic
prospects, or a variety of angles other studies that may arise later. 
