The short answer is that you let the students lead. It’s amazing how much they can step up when they know there is literally nobody else who will do it for them/design their parts/order things/or even necessarily check in on them as often as they should. Failure is a real and ever-present possibility, but the students (at least on our team) tend to thrive despite (or prehaps because of) this.
The long answer:
We fall into your parameters, (unless you are incredibly broad in your definition of “mentor”). We average 50-60 students with about 3 “full time” mentors, ~2 “part time” mentors, and a small parent-run booster club, plus a few interested professionals/alumni who drop in randomly for a few meetings per year and help put out fires or answer questions but who aren’t providing long-term/stable mentoring/advice. Professionally our mentors are a project manager (who dabbles in programing and 3D printing), a physics teacher (me), a retired electrical engineer, a retired toolmaker, and a (new) mechanical engineer who graduated from our team a few years ago. Our parents in the booster club work in a variety of mostly non-technical fields and mostly try to help out with managing the team checkbook/refunding mentors for purchases, booking rooms, running/helping students run fundraisers etc. and, in this capacity, also do some level of mentoring with our buisness department, but the relationship building and individaul time/person isn’t at the same level.
Our student leadership structure is divided among 4 Captains who have Division Heads and Department Leaders underneath them. MANY students have a leadership role (in many cases “job title” might be a better discription, but the big idea is to just provide structure). Dividing the responsibility out helps make sure everything gets done, but having a hierarchy alo helps make sure if there’s a weak spot that it gets identified as quickly as we can. We try to make sure the students don’t have too many positions, but all of the Captains and Division Heads are also the leader of one of the smaller departments in their area so they still have something to “do” at all times and also something to show for their work at the end of the year. The mentors all know which departments/divisions/captains we are responsible for checking and and, ultimately, all of us report to our head coach.
Off the top of my head, our student leadership structure looks like this, or something close to it: (The roles are adjusted slightly from year to year based on where weak spots were the previous, things that feel like they should be combined/added/abandoned based on new projects/inititaveis, , etc. )
Format:
Captain (4 total)
…Division Head(s) reporting to that Captain
…,…Department Leads reporting to that Division Head
Admin Captain (basically the bridge between a student and a coach - takes attendance, helps with logistics like reserving hotels or restauraunts for team meals if needed, makes sure people have turned in their paperwork, puts out fires, etc.)
…,…Spirit Lead
…,…Food/Snacks Lead
…,…Safety “Captain”(official FIRST role, we treat this as a department lead
…,…GEARs Lead (our girls in engineering support group)
…Quartermaster (in charge of organization and ordering - this is a blend of both the admin department and the engineering department, we’ve found it tends to work best if they report to admin though)
Engineering Captain
…CAD & Drawings Division
…,…Training
…,…File Organization
…Mechanical Division
…,…Drivetrain & Bumpers
…,…Manipulator #1
…,…Manipulator #2
…,…Manipulator #3+ (as needed)
…Controls Division
…,…Electrical
…,…Pneumatics
…,…Programming
…,…,…Development sub-department
…,…,…Training sub-department
…Strategy Divison
…,…Scouting
…,…Field Elements
Business Captain
…Finance Division
…,…Fundraising
…,…,…Volunteer Coordinator
…,…,…Restauraunt Fundraisers
…,…,…“Big” Fundraiser #1, 2, 3, etc. (as needed)
…,…Grants
…,…Sponsors
…,…,…Sponsor Retention
…,…,…New Sponsor Recruitment
…Marketing
…,…Visual Art
…,…Social Media
…,…Photography/Historian
…,…Webmaster
…,…Writer/Editor
…,…Apparel & Merchandise
Outreach Captain
…Camps
…Volunteers & Community Ed
…FIRST Programs
…,…FLL Jr
…,…FLL Curriculum
…,…FLL Mentor Coordinator
…One-Off Events
…“Crimson Classroom” (one of our continuing outreach initiatives we need someone to manage)
At the end of the day we’re a slightly above average team and we work hard to be that. I’m proud of what we do, but we also won’t be dethroning 254 anytime soon. We tend to be in elims at weaker regionals and have a 50-50 shot of making elims at stronger regionals. We average about 0.5 banners per year (more chairman’s than event wins, but we’ve done both) and have made Einstien once. As one of the few mentors it can be stressful at times; I used to be the head coach and had to take some time off a few years ago because it was just too much, but now I’m back helping out again.
Trust your kids. Be honest with them, let them know how much the team needs them and that your mentors really do have limitations. Try to let the students do as much of the leading as they can and have your mentors put out fires when they need it.