The purpose of a research proposal is to demonstrate to a literate but non-expert audience that your work deserves funding. Readers will want to see a brief but compelling literature review that indicates your ability to define and approach a fundamental unresolved problem in your domain. Once you contextualize the importance of what you study, demonstrate that you have a sound methodology and adequate time to answer the questions you have posed. If there are individuals or facilities that will be critical to accomplishing your research, mention them and the role they will play. Be sure to make clear that you possess, or will learn quickly, all skills necessary to achieve your goals.