HEIR, GENERAL. Heir at common in the English law. The heir at common law is he who, after his father or ancestor's death has a right to, and is introduced into all his lands, tenements and hereditaments. He must be of the whole blood, not a bastard, alien, &c.
An air data computer (ADC) is a avionics component that assimilates the inputs from an aircraft's external and system sensors and returns a series of calculated results critical to the control of the aircraft. In one compact package, the air data computer performs what a bank of individual instruments were once required to do. Almost all the flight-related information displayed in newer commercial aircraft fitted with glass cockpits is compiled by an air data computer.
Electronic Control Unit (ECU) The computer or brains of the EFI system. This is where the fuel maps exist and all fuel calculations are made. The fuel map provides the ECU with the information to adjust the air/fuel ration of the engine. All OEM ECUs are able to control both the fuel injection and ignition systems.