Aviation of WWII
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Pilot`s Notes Bf 109K-4 Aircraft Handbook

Bf 109K-4

Aircraft Handbook

art 9A General Equipment

III - Flight Monitoring and Navigation Instruments
A. Description

Flight Monitoring Instruments

Fig 3. Flight Monitoring Instruments.

III. 2: Overview of the Engine Monitoring instruments (For key to diagram see text)

Flight Monitoring Instruments

The following instruments are installed for flight monitoring purposes (see Fig. 3):

Airspeed Indicator

Heatable Pitot Tube

Pressure Altimeter

Rate of Climb Indicator

Differential Pressure Tank

Also in the instrument panel there is a cutout for the installation of an aircraft clock.

1. Airspeed Indicator

The airspeed indicator with a measuring range of 100 to 900 kni/h is positioned on the upper left of the instrument flight panel.

2. Pitot Tube

The Heatable pitot tube for airspeed is installed in the wing tip of the left wing. Transmission of the dynamic and static pressures to the airspeed indicator is through tubing.

3 Pressure Altimeter

For altitude measurement, a pressure altimeter is fitted on the instrument flight panel underneath the airspeed indicator. The altimeter is connected to the Static pressure line.

4. Rate of Climb Indicator

To indicate the climb and descent speeds of the aircraft, a rate of climb indicator is installed on the upper right of the instrument tlight panel. The indicator is connected on one side to the static pressure line and on the other side to the differential pressure tank.

5. Differential Pressure Tank

The differential pressure tank for the rate of climb indicator is located in the fuselage ahead of the instiiiment panel and is attached by clamps to two mounting brackets, which are screwed to the Z-section former of the forward fuselage deck.

Fig.3: Overview of the Flight Monitoring Instruments

1. Airspeed Indicator

2. Pitot Tube

3. Pitot Pressure Tubing

4. Electrical-lead for Pitot Heater

5. Pressure Altimeter

6. Rate of Climb Indicator

7. Differential Pressure Tank

8. Circuit Breaker Panel

Navigation Instruments

Overview of the Navigation as well as the Rescue and safety equipment

Fig. 4: Overview of the Navigation as well as the Rescue and safety equipment

1. Master Compass , 2. Repeater Compass, 3. Artificial Horizon, 4. Motor-Generator, 5. Safety Belts, 6. Flare Gun Port, 7. Circuit Breaker for the Compass Installation

The following navigation instruments are installed (see Fig. 4):

Master Compass

Repeater Compass

Artificial Horizon


6. Master Compass

The master compass is in the lower rear fuselage in section 5 in a spring suspension mounting. After serial No.......the Master Compass is installed lit upper fuselage section 5 and in reconnaissance aircraft in upper fuselage section 6. It is connected electrically to the repeater compass and controls its course card.

7. Repeater Compass

The repeater compass is installed at the bottom of the instrument flight panel It is a navigation instrument whose course display is controlled electrically by the master compass.

Master Compass

Fig. 5: Master Compass

1. Master Compass, 2. Mounting

8. Artificial Horizon

The artificial horizon displays the attitude of the aircraft in space and is positioned at the top of the instrument flight panel.

9. Motor-Generator

The Motor-Generator powers the artificial horizon and is mounted in front of the instrument panel on the left fuselage wall.