This sounds like some very interesting work.
If you haven't yet discovered this section of the Science Buddies web site, check it out:http://www.sciencebuddies.org/science-f ... port.shtml
I feel it gives VERY good direction on how to communicate, that is "write up", any good bit of scientific research.
Although you have not completed your work, it is still appropriate for you to document what you have accomplished. In this case you will need to spend some effort to describe what additional work will be needed to complete your project.
I would consider your project more of an "engineering" project, than a "scientific" one. Rather than state a hypothesis, you should focus on stating the problem, or your objective. You can still present the questions you are attempting to answers and discuss the variables and experiments you have conducted. Present the conclusions you have reached as a result of these experiments, even if your experiments have failed. Those still teach you what "is not" true, or what approach will not work.
I hope this helps you.
Although this is a lot of work, I hope you find it enjoyable, fulfilling, and have FUN!