Which instrument provides information on the aircraft's vertical speed in the Beechcraft Travel Air BE-95?

The Vertical Speed Indicator (VSI) is the instrument specifically designed to provide information on the aircraft's vertical speed. It measures the rate of climb or descent in feet per minute. When the aircraft is climbing, the VSI will show a positive value, indicating the rate at which the aircraft is ascending. Conversely, when the aircraft is descending, it will display a negative value. This information is crucial for pilots to maintain a desired altitude and manage the aircraft's performance effectively during various phases of flight, such as takeoff, landing, and cruising.

The altimeter measures altitude by comparing the atmospheric pressure outside the aircraft to a set standard pressure, but it does not indicate vertical speed. The airspeed indicator provides the speed of the aircraft relative to the surrounding air and has no relation to vertical ascent or descent. The heading indicator shows the aircraft's directional heading but does not provide any elevation information. Thus, the VSI is the key instrument for vertical speed awareness.