Is the design:
- Scale
- Stand-off
- Fun-fly
- Totally radical and unique

Think of the following:

What incentive would there be for someone to stock and try to sell your drawing, or why would a manufacturer consider putting it into production?
Keep in mind that all the risks are on the manufacturer, or reseller.

Things to consider:
- Marketing/advertising, what means, for how long?
- Are you providing packaged drawings, ready for resale?
- Is the seller responsible for the printing, labeling and packaging?
- Do you have a price schedule ie: wholesale vrs retail?
- Are you willing to provide support? Technical as well as parts?
- Are you considering a royalty based licencing approach?
- Is the design such, that a reseller would take a risk in carrying it?
- Is the design proven?
- Has the finished product ever been entered in competition? If so, who flew it?
- Have you prepared a market analysis for drawings vrs production for your design?
- Do you have financial backing to "showcase" your design to prospectives?

An example:
http://strategis.ic.gc.ca/app/cipo/c...1&language=eng

Not to discourage you, but this is the real life business world now, and it's very competetive.
pm me if you wish to further discuss it.