Eagle is absolutely right on the money.
How many mentors are on the team and what role/responsibility do you have? If you are a primary/lead mentor perhaps you could call a meeting of the mentors and discuss in general terms the goals of the team and how to handle situations.
For my team the winning is not our first goal. Anyone (almost) given the right support and funding can win (i.e. enough engineers, plenty of money etc.) but what else do you want your team to take from the competition? My BIG thing is the Gracious Professionalism, team work, and comradery not just between team mates but competitors as well. As a rookie team you probably did what I did and just jumped in head first and blind as a bat. Now that you have seen the competition and 'been there done that' you have the opportunity to develop and put in writing what you want for the team and expect from the kids AND mentors. Use this time between competitions wisely because believe it or not it will fly by and the next thing you know the 2012 season will be upon us!
BTW congratulations on the top 15 finish! Not even seasoned veterans always finish that high!
