Airflow Performance Backflow to Fuel Tank: Ensuring Optimal Operation in RV-6/7/9 Aircraft

When it comes to maintaining optimal airflow performance and preventing backflow to the fuel tank in RV-6/7/9 aircraft, builders rely on specific components that ensure smooth operation. One such critical component is the auxiliary pump kit designed by API, which requires mounting behind the firewall. This pump is intended to be installed in series with the engine-driven fuel pump.

For RV-8/8A builders with pre-punched fuselage kits from Van's (shipped since 2007), the process is slightly different. They only need to purchase a fuel pump ES AIRFLOW PUMP-1, without requiring an installation kit.

Despite the importance of proper pump operation, some builders may encounter issues or questions related to this component. It's essential to emphasize that any concerns should be addressed by contacting the manufacturer directly. In fact, each pump shipped comes with a manual and phone number on the front page for immediate assistance.

In the past, some pumps were tested using gasoline as a test fluid; however, this practice has been discontinued due to concerns about damaging the pump during initial installation or prolonged storage. Instead, the pumps are now run on an oil flush bench after completing the test phase to ensure thorough testing and quality control.

Each pump built undergoes rigorous testing, including flow output, motor current draw, external leakage, and relief valve opening pressure checks. Since January 2006, a lot number is stamped on the banjo manifold corresponding to the build, allowing for easy tracking of each pump's performance.

It's worth noting that every pump built by this manufacturer is run on a test stand for approximately 10-15 minutes before shipping, ensuring optimal performance and reliability.

By following these guidelines and utilizing the correct components, RV-6/7/9 aircraft builders can ensure optimal airflow performance and prevent backflow to the fuel tank, ultimately maintaining the integrity of their aircraft.

Airflow performance backflow to fuel tank