Final answer:
A major difference in fuel metering between the Teledyne-Continental and RSA continuous flow fuel injection systems is that the former is air density controlled, affecting fuel-to-air ratio with altitude and temperature, whereas the latter regulates fuel flow based on manifold pressure, maintaining a more constant fuel-to-air ratio.
Step-by-step explanation:
The question pertains to the difference in fuel metering between the Teledyne-Continental and RSA (Precision Airmotive or Bendix) continuous flow fuel injection systems used in aviation engines. A significant difference between the two systems is how they control the air-fuel mixture that is delivered to the engine's cylinders.
The Teledyne-Continental fuel injection system uses air density to control fuel metering whereas the RSA system uses airflow that is affected by engine manifold pressure. In more technical terms, the Teledyne-Continental system is air density controlled with the fuel-to-air ratio changing with altitude and temperature.
In contrast, the RSA system adjusts the fuel flow based on changes in the engine's throttle position, which changes the manifold pressure, thus maintaining a more constant fuel-to-air ratio under varying conditions of engine load and air density.