ORIGINAL: piper_chuck
Adding to the list:
Prop wrench (4 way plug wrenches don't always fit)
Spare prop nuts and washers
Spare glow plugs
Needle nose pliers
First aid kit (to hold all the band-Aids
)
Thin CA (as an alternative to band aids
)
Battery tester
Buddy cord(s) (if you're an instructor)
Loctite
Prop reamer (if you haven't done this at home while balancing them)
Paper towels & spray (I use simple green) for cleaning the plane at the end of the day
Waterless hand cleaner (I'm not crazy about sliming up the steering wheel on the way home)
I usually carry everything already mentioned but i always also have a tach, metal spike and rope to tie my planes down with as for hand cleaner I use the stuff we use at work which is an alcohol based antibacterial gel. I also always have a cell phone at hand in case something ever goes badly wrong. as for a first aid kit I have a full trauma kit in the back of my car with oxygen.