How many engine-driven vacuum pumps are in the Beechcraft Travel Air BE-95?

The Beechcraft Travel Air BE-95 is equipped with two engine-driven vacuum pumps. This design ensures redundancy and reliability in the aircraft's vacuum system. Having two pumps allows for continuous operation of essential instruments that depend on vacuum, such as the attitude indicator and heading indicator. If one pump fails, the other can maintain suction, thus providing a backup to ensure critical flight data is available to the pilot.

This dual-pump configuration is particularly advantageous for safety, as it reduces the risk of complete system failure due to a single point of malfunction. The choice to include two pumps instead of one or a higher number also balances weight and complexity with operational necessity. Options indicating a different number of pumps do not align with the design specifications of the BE-95, underscoring the importance of understanding the aircraft’s system architecture when preparing for safe flight operations.