Sun Jan 20, 2013 3:05 am by Libertyclicks
I'm late to come to the party, but fixed wing aircraft (I don't know about helicopters) of the small variety are much easier to start with a key but I have started cessna , piper, and zlin aircraft without a key . You just need to know how the systems work. Any bush pilot could do it.
Medium aircraft (small multi engine or larger single engine aircraft) only need key for entry, if you know how to get the plane started you don't need the key.
Large aircraft (jets or turbine powered propellers) will have a means of access without keys and will not need the keys for operation. You'd still need a pilot with experience on the type of plane to get anywhere safely.