1) Hydrofoil, 2) gear, 3) chassis, 4) transmission of the gear to the undulators, 5) adjustable
propeller pitch.
Before descending, I ran another cockpit check to configure the fuel tanks, mixture,
propeller pitch, and pitot tube heat.
Damaged-engine noise and changes in
propeller pitch can be heard.
For each aircraft configuration (weight, flaps,
propeller pitch, etc.), there is such a polar that can be generated from a sequence of test glides.
The main gas-turbine control system modulates either fuel or
propeller pitch in response to a command from the propulsion lever on the bridge.