Bjorn’s Corner: Pitch stability

November 23, 2018, ©. Leeham News: In the spring I ran a series of Corners which dealt with aircraft stability on a basic level (April 13 to June 8). It covered the aircraft’s basic stability modes in normal… Read More

Bjorn’s Corner: Aircraft stability, Part 9

June 8, 2018, ©. Leeham News: In the last Corner we discussed how a pilot uses the advanced Automatic Flight Control System (AFCS) on modern high-end business jets and airliners. Now we will discuss what separates the high-end (and… Read More

Bjorn’s Corner: Aircraft stability, Part 7

May 25, 2018, ©. Leeham News: In the last Corner we discussed the autopilots one finds in Airliners and high-end Business jets. We looked at how the autopilot was part of the larger Automatic Flight Control System (AFCS) in… Read More

Bjorn’s Corner: Aircraft stability, Part 6

May 18, 2018, ©. Leeham News: In the last Corner we discussed the autopilots one finds in Turboprops and entry-level Business jets. Our example was the autopilot for the Garmin G1000 integrated flight deck. Now we will step up… Read More

Bjorn’s Corner: Aircraft stability, Part 5

May 11, 2018, ©. Leeham News: In the last Corner, we discussed more capable autopilots used in general aviation aircraft and the Attitude and Heading Reference System (AHARS) we needed to go to more advanced autopilots. We will now… Read More

Bjorn’s Corner: Aircraft stability, Part 4

May 4, 2018, ©. Leeham News: In the last Corner, we discussed basic autopilots used in general aviation aircraft. The key components for such a system are shown in Figure 1. Now we will go to more advanced autopilots…. Read More

Bjorn’s Corner: Aircraft stability, Part 3

April 27, 2018, ©. Leeham News: In the last Corner we discussed the problems with the long term stability of an aircraft. The aircraft deviates gradually in pitch, roll and in a combined yaw and roll mode if left… Read More

Bjorn’s Corner: Aircraft stability, Part 2

April 20, 2018, ©. Leeham News: In the last Corner, we discussed how to stabilize an aircraft in pitch so it could fly stably straight ahead. For this, we needed a horizontal tail which had a negative lift. This… Read More

Bjorn’s Corner: Aircraft stability

April 13, 2018, ©. Leeham News: In the last Corner we discussed the pressure distribution on a conventional airfoil and compared it with a modern Supercritical airfoil. The Supercritical airfoil (which is used on all modern airliners) achieves a… Read More