1 | Cabin pressurization switch. Two available positions: "PRESS" and "DUMP". The "DUMP" position will de-pressurize the cabin. |
2 | Pressurization set-up dial. Click on the dial to increase the target cabin altitude by 500 ft. |
3 | The center part will indicate the maximum aircraft altitude for the current cabin pressure. Click on this center area to reduce the target altitude by 500 ft. |
4 | Cabin (climb) rate adjust knob. This knob will allow you to adjust how fast the cabin pressure is changing. To use the knob, clikc on it with the left mouse button, and drag your mouse in vertical direction. |
5 | Cabin altitude setting knob. You can use this knob to set the desired target altitude. To use the knob, clikc on it with the left mouse button, and drag your mouse in vertical direction. Alternatively, you can click on the dial itself and its center part to increase/reduce the altitude at 500 ft. steps. |
How to use the pressurisation
1. Before takeoff set the pressurization dial (pedestal, no. 2) "ACFT Altitude" to be 500-1000 feet higher than your planned highest altitude during fligth. 2. Set Cabin pressurization switch (pedestal, no. 1) to "PRESS". 3. After takeoff move the Bleed Air Valves (copilot switches, no. 8&9) to "OPEN". 4. During Climb, monitor the Cabin VSI (throttle quadrant no.2) and Cabin Altitude (throttle quadrant no.3) instruments. If necessary you can adjust the cabin climb rate from the Cabin Rate knob (pedestal, no. 4), so that the "Cabin Difffrential Pressure" does not exeed 6.6 PSI. 5. Before descent set the pressurization dial (pedestal, no. 2) "Cabin Altitude" to the landing airfield altitude. 6. Adjust the Cabin Rate knob (pedestal, no. 4) to achieve sufficient cabin descent rate to reach the landing airfield altitude before landing. Notes: - CABIN DIFF-warning light in the Master Warning Panel will be lit if the pressure differential between outside air and cabin exceeds 6.6 PSI. - CABIN ALT-warning light in the Master Warning Panel will be lit if the cabin altitude rises above 12500 feet. |