What is the lubrication system?

• A. A wet sump system connected to external oil supply.
• B. A self-contained recirculation, dry sump type, requiring no external connections or inputs.
• C. External oil reservoir requiring aircraft power.
• D. A non-recirculating dry film lubrication system.

Answer: (B)

Lubrication systems in aircraft are designed to keep moving parts supplied with oil under all flight conditions, and they come in dry-sump vs wet-sump and in recirculating vs non-recirculating configurations. The best description here is a self-contained recirculating dry-sump system. In this setup, oil is kept in a dedicated reservoir (not in the engine’s main crankcase), pumped to bearings and components, and then returned to the reservoir in a closed loop. There are no external oil connections or inputs required during operation, which makes the system self-contained. This arrangement provides a stable oil supply and pressure even under high-G maneuvers and reduced crankcase volume, advantages that fit the needs of high-performance aircraft like the Growler. The other options describe setups that rely on external oil supplies, external reservoirs, or non-recirculating lubrication, which do not match how a dry-sump, self-contained system operates.