"That is what John and I call an 'automatic pilot,'" answered Paul. "It is a new form of stabilizer, and made so as to overcome the defects of others which are on the market.  A stabilizer should automatically keep an airplane on a fairly level keel no matter how air conditions are, even so steady that it will travel along on its course for a considerable distance with the pilot paying no attention to his controls, perhaps eating his lunch or reading his orders."