Heres my routine, and like you, I have limited time so I keep each session to 10 to 15 minutes.

First lesson: 10 minutes on my trainer to keep them interested and give them some stick time on a plane that is properly set up and trimmed.

Next lesson(s): 10 minutes of tearing down and doing a pre-flight / post-flight inspection of their plane. Showing them how to set up a logbook and noting location of key controls and making adjustments and corrections to those controls and to log everything they do so that I can sign off their "homework" at the next session.

Future lessons: We do not fly the plane until they can demonstrate that they understand how to set up a plane for safe flight. If they don't like that and just want to learn how to burn holes in the sky, they can find another instructor. I teach so that they can fly many solo flights on the same plane without taking it home in a bag.

I have found it useful to give people who are interested in learning to fly a sort of sylabus that explains what we will be going over during the training period. One of the requirements I ask for is the instruction manual for their plane if they have it.

I basically instruct RC like I was instructed in flying full scale.

As far as test flying other peoples planes: The number one rule is that YOU are the one in charge, and only you are responsible to check the plane out before flying it, and if YOU do not feel safe about flying it, then don't fly it, ground it and go over with the owner your concerns. Once you take it off the ground, it is your responsibility for not checking the battery, elevator, rudder, ailerons, fuel system, retracts, and etc. when something goes bad. Trust me, I have had more than a few times where I was more excited then the owner to fly a new warbird and overlooked a few major flaws in order to get into the air.

Scott