WaS
Space Cadet
Auf leehamnews.com gibt's mehrere m.E. sehr lesenswerte Serien zu aerodynamischen Grundlagen und Flugzeugtechnik. Leider existiert kein dazu gehörendes Inhaltsverzeichnis, und die einzelnen Folgen der Serien sind untereinander auch nicht durchgehend verlinkt. Im Gegensatz zu vielen anderen Artikeln von Leeham News sind sie kostenlos verfügber.
Um mir selber das Lesen zu erleichtern, habe ich mir Link-Listen gemacht; vielleicht sind sie auch für euch von Interesse. (Die Moderatoren mögen das Thema bitte nach z.B. "Multimedia" oder "Literatur" verschieben, falls sie meinen, dass es dort eher hingehört.)
"Fly by steel or electrical wire":
"Aircraft stability":
(Der Titel ist m.E. etwas irreführend; lest selbst!)
"Pitch stability":
(Die Nummerierung in den URLs ist etwas inkonsistent – nicht verwirren lassen!)
"Aircraft lift":
"Fundamentals of airliner performance":
"Aircraft drag reduction" (mit ausf. historisch aufgebauter Einführung in die Grundlagen):
Um mir selber das Lesen zu erleichtern, habe ich mir Link-Listen gemacht; vielleicht sind sie auch für euch von Interesse. (Die Moderatoren mögen das Thema bitte nach z.B. "Multimedia" oder "Literatur" verschieben, falls sie meinen, dass es dort eher hingehört.)
"Fly by steel or electrical wire":
Bjorn’s Corner: Fly by steel or electrical wire? - Leeham News and Analysis
July 25, 2019, ©. Leeham News: Last week’s Corner which dealt with Airbus’ issue with an updated A321neo Fly By Wire (FBW) and how it was unrelated to the issue of the Boeing 737 MAX, gives a good... Read More
leehamnews.com
Bjorn’s Corner: Fly by steel or electrical wire, Part 2 - Leeham News and Analysis
July 25, 2019, ©. Leeham News: In our series about classical flight controls (“fly by steel wire”) and Fly-By-Wire (FBW or “fly by electrical wire”) this week we cover the difference in system infrastructure the two controls methods... Read More
leehamnews.com
Bjorn’s Corner: Fly by steel or electrical wire, Part 3 - Leeham News and Analysis
August 9, 2019, ©. Leeham News: In our series about classical flight controls (“fly by steel wire”) and Fly-By-Wire (FBW or “fly by electrical wire”), we this week turn to the actual Flight control system after covering the... Read More
leehamnews.com
Bjorn’s Corner: Fly by steel or electrical wire, Part 4 - Leeham News and Analysis
August 16, 2019, ©. Leeham News: In our series about classical flight controls (“fly by steel wire”) and Fly-By-Wire (FBW or “fly by electrical wire”) we this week discuss the Flight Control System’s authority to execute maneuvers by... Read More
leehamnews.com
Bjorn’s Corner: Fly by Steel or Electrical wire, Part 5 - Leeham News and Analysis
August 23, 2019, ©. Leeham News: In our series about classical flight controls (“fly by steel wire”) and Fly-By-Wire (FBW or “fly by electrical wire”) we now look at practical implementations after discussing the authority of the flight... Read More
leehamnews.com
Bjorn’s Corner: Fly by steel or electrical wire, Part 6 - Leeham News and Analysis
August 30, 2019, ©. Leeham News: In our series about classical flight controls (“fly by steel wire”) and Fly-By-Wire (FBW or “fly by electrical wire”) we now discuss the flight control laws which are used for Classical flight... Read More
leehamnews.com
Bjorn’s Corner: Fly by steel or electrical wire, Part 7. - Leeham News and Analysis
September 6, 2019, ©. Leeham News: In our series about classical flight controls (“fly by steel wire”) and Fly-By-Wire (FBW or “fly by electrical wire”) we discussed the flight control laws which are implemented with classical flight controls... Read More
leehamnews.com
Bjorn’s Corner: Fly by steel or electrical wire, Part 8 - Leeham News and Analysis
September 13, 2019, ©. Leeham News: In our series about classical flight controls (“fly by steel wire”) and Fly-By-Wire (FBW or “fly by electrical wire”) we discussed the flight control laws of Boeing’s 777/787 and Airbus’ A220 last... Read More
leehamnews.com
Bjorn’s Corner: Fly by steel or electrical wire, Part 9 - Leeham News and Analysis
September 20, 2019, ©. Leeham News: In our series about classical flight controls (“fly by steel wire”) and Fly-By-Wire (FBW or “fly by electrical wire”) we discussed the FBW flight control system of Embraer’s E-Jet E2 series last... Read More
leehamnews.com
Bjorn’s Corner: Fly by steel or electrical wire, Part 10 - Leeham News and Analysis
September 27, 2019, ©. Leeham News: In our series about classical flight controls (“fly by steel wire”) and Fly-By-Wire (FBW or “fly by electrical wire”) we started a discussion about the need for stability augmentation systems last week... Read More
leehamnews.com
Bjorn’s Corner: Fly by steel or electrical wire, Part 11 - Leeham News and Analysis
October 4, 2019, ©. Leeham News: In our series about classical flight controls (“fly by steel wire”) and Fly-By-Wire (FBW or “fly by electrical wire”) we now discuss pitch stability augmentation systems when we need to improve the... Read More
leehamnews.com
Bjorn’s Corner: Fly by steel or electrical wire, Part 12 - Leeham News and Analysis
October 11, 2019, ©. Leeham News: In our series about classical flight controls (“fly by steel wire”) and Fly-By-Wire (FBW or “fly by electrical wire”) we continue our discussion of pitch stability augmentation systems when we have a... Read More
leehamnews.com
Bjorn’s Corner: Fly by steel or electrical wire, Part 13 - Leeham News and Analysis
October 18, 2019, ©. Leeham News: In our series about classical flight controls (“fly by steel wire”) and Fly-By-Wire (FBW or “fly by electrical wire”) we continue our discussion of pitch stability augmentation systems when we have a... Read More
leehamnews.com
"Aircraft stability":
(Der Titel ist m.E. etwas irreführend; lest selbst!)
Bjorn’s Corner: Aircraft stability - Leeham News and Analysis
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
leehamnews.com
Bjorn’s Corner: Aircraft stability, Part 2 - Leeham News and Analysis
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
leehamnews.com
Bjorn’s Corner: Aircraft stability, Part 3 - Leeham News and Analysis
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
leehamnews.com
Bjorn’s Corner: Aircraft stability, Part 4 - Leeham News and Analysis
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
leehamnews.com
Bjorn’s Corner: Aircraft stability, Part 5 - Leeham News and Analysis
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
leehamnews.com
Bjorn’s Corner: Aircraft stability, Part 6 - Leeham News and Analysis
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
leehamnews.com
Bjorn’s Corner: Aircraft stability, Part 7 - Leeham News and Analysis
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
leehamnews.com
Bjorn’s Corner: Aircraft stability, Part 8 - Leeham News and Analysis
June 1, 2018, ©. Leeham News: In the last Corner, we discussed the how the Flight Management System (FMS) is the part which calls the shots in a high-end autopilot (or Automatic Flight Control System, AFCS, as it’s called... Read More
leehamnews.com
Bjorn’s Corner: Aircraft stability, Part 9 - Leeham News and Analysis
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
leehamnews.com
"Pitch stability":
(Die Nummerierung in den URLs ist etwas inkonsistent – nicht verwirren lassen!)
Bjorn’s Corner: Pitch stability - Leeham News and Analysis
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
leehamnews.com
Bjorn’s Corner: Pitch stability, Part 2 - Leeham News and Analysis
November 30, 2018, ©. Leeham News: Last week we started a series on pitch stability of aircraft. It has actuality as the reason Boeing introduced the now well-known MCAS (Maneuver Characteristic Augmentation System) was to improve the pitch... Read More
leehamnews.com
Bjorn’s Corner: Pitch stability, Part 3 - Leeham News and Analysis
December 7, 2018, ©. Leeham News: Last week we looked at the pitch stability of an aircraft wing with fuselage. We could see the combination was unstable. Now we add a rear wing called a horizontal stabilizer to... Read More
leehamnews.com
Bjorn’s Corner: Pitch stability, Part 4 - Leeham News and Analysis
By Bjorn Fehrm December 14, 2018, ©.Leeham News: Last week we introduced a horizontal stabilizer to make our DC-9 like aircraft stable in pitch. We got a pitch moment curve which was forcing the nose down of the... Read More
leehamnews.com
Bjorn’s Corner: Pitch stability, Part 5 - Leeham News and Analysis
Jan. 11, 2019, ©. Leeham News: The week before Christmas we discussed the pitch stability of an airliner. We covered how a horizontal stabilizer made the aircraft stable in pitch, and why transonic airliners used a trimmable horizontal... Read More
leehamnews.com
Bjorn’s Corner: Pitch stability, Part 6 - Leeham News and Analysis
Jan. 18, 2019, ©. Leeham News: We have now covered the basics of pitch stability for an airliner and how a stable or unstable pitch moment curve looks. Now we look at different trouble areas. Straight and stable... Read More
leehamnews.com
Bjorn’s Corner: Pitch stability, Part 7 - Leeham News and Analysis
Jan. 25, 2019, ©. Leeham News: We have covered the pitch stability for an airliner including some well know problems around deep stall. We now continue with other frequent problems as the aircraft covers a large envelope in speed... Read More
leehamnews.com
Bjorn’s Corner: Pitch stability, Part 8 - Leeham News and Analysis
Feb. 01, 2019, ©. Leeham News: In last week’s Corner, we covered the high-speed pitch stability problem most airliners have, Mach tuck. Now, we continue with low-speed problems which made Boeing introduce Speed trim on the 737. Low-speed... Read More
leehamnews.com
Bjorn’s Corner: Pitch stability, Part 9 - Leeham News and Analysis
Feb. 08, 2019, ©. Leeham News: In our run through of the pitch stability problems of an airliner we covered high and low-speed problems in the last Corners and before it deep stall. Now we go back to... Read More
leehamnews.com
Bjorn’s Corner: Pitch stability, Part 10. Wrap up. - Leeham News and Analysis
Feb. 15, 2019, ©. Leeham News: We now summarize the problems around an airliner’s pitch stability and why a good pitch stability is so important before we go to the next subject, yaw stability. The pitch stability and... Read More
leehamnews.com
"Aircraft lift":
Bjorn’s Corner: Aircraft lift - Leeham News and Analysis
March 23, 2018, ©. Leeham News: In the last Corner, we finished our series about aircraft drag, by studying an airliner flying a mission and noting how the drag changed. Before we leave the subject of airliner aerodynamics, we... Read More
leehamnews.com
Bjorn’s Corner: Aircraft lift, Part 2 - Leeham News and Analysis
March 30, 2018, ©. Leeham News: In the last Corner, we described how lift is produced on the aircraft’s wings. Now we continue with studying the lift a bit further. We explore the effect of angle of attack on... Read More
leehamnews.com
Bjorn’s Corner: Aircraft lift, Part 3 - Leeham News and Analysis
April 06, 2018, ©. Leeham News: In the last Corner, we discussed the pressure distribution of an aircraft’s wing when producing lift. This was with a conventional airfoil (though of the more laminar flow type). Now we continue by... Read More
leehamnews.com
"Fundamentals of airliner performance":
Fundamentals of airliner performance, Part 1 - Leeham News and Analysis
By Bjorn Fehrm As part of our premium content we provide a briefer form of our airliner performance analysis than we provide to our consulting clients. As we present this material, we presume a lot of knowledge on... Read More
leehamnews.com
Fundamentals of airliner performance, Part 2. - Leeham News and Analysis
By Bjorn Fehrm In our first article on how to understand the fundamentals that make up airliner performance we defined the main forces acting on an aircraft flying in steady state cruise. We used the ubiquitous Boeing 737 in... Read More
leehamnews.com
Fundamentals of airliner performance, Part 3 - Leeham News and Analysis
By Bjorn Fehrm In our first article about how to understand the performance of a modern airliner we defined the main forces that are acting on an aircraft flying in steady state cruise. In our clinic we use the... Read More
leehamnews.com
Fundamentals of airliner performance, Part 4 - Leeham News and Analysis
By Bjorn Fehrm Nov. 25, 2014: In our article series around the performance of a modern airliner we have now come to the climb after takeoff. We started with cruise as this was simplest because the aircraft is... Read More
leehamnews.com
"Aircraft drag reduction" (mit ausf. historisch aufgebauter Einführung in die Grundlagen):
Bjorn’s Corner: Aircraft drag reduction - Leeham News and Analysis
October 06, 2017, ©. Leeham Co: In the last several Corners, we wrote about research around laminar flow for aircraft. It’s research to lower the aircraft’s drag. Why is this important? How large are the different drag types and... Read More
leehamnews.com
Bjorn’s Corner: Aircraft drag reduction, Part 2 - Leeham News and Analysis
October 27, 2017, ©. Leeham Co: After a detour over Airbus’ A330neo first flight last Friday, we now continue with aircraft drag. We divided drag in two classes last time: drag from size and drag from weight. These drag... Read More
leehamnews.com
Bjorn’s Corner: Aircraft drag reduction, Part 3 - Leeham News and Analysis
Nov. 3, 2017, ©. Leeham Co: In the previous Corner, we described how the aeronautical pioneers gradually uncovered what held them back from flying their gliders and airplanes successfully. They knew they needed lift to fly. And to generate... Read More
leehamnews.com
Bjorn’s Corner: Aircraft drag reduction, Part 4 - Leeham News and Analysis
October 27, 2017, ©. Leeham Co: In this and the following Corners, we will review the competition for first manned flight between Samuel Langley, high ranking scientist of Allegheny Observatory in Pittsburgh, and the Wright Brothers, bicycle manufacturers in... Read More
leehamnews.com
Bjorn’s Corner: Aircraft drag reduction, Part 5 - Leeham News and Analysis
November 17, 2017, ©. Leeham Co: In the last Corner, we described how the Wright Brothers (bicycle manufacturers in Dayton (OH)) decided to research their own aerodynamic data with the help of their own designed-and-built wind tunnel. The wind... Read More
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Bjorn’s Corner: Aircraft drag reduction, Part 6 - Leeham News and Analysis
November 24, 2017, ©. Leeham Co: In the last Corner, we described how the Wright Brothers obtained the aerodynamic data they needed to design gliders and aircraft. But there was additional knowledge they needed: how to control an aircraft... Read More
leehamnews.com
Bjorn’s Corner: Aircraft drag reduction, Part 7 - Leeham News and Analysis
December 01, 2017, ©. Leeham Co: In previous Corners, we looked at how the Wright Brothers understood the wing aerodynamics and aircraft control. We now describe how the Wright cracked the third nut keeping them from manned flight, propulsion.... Read More
leehamnews.com
Bjorn’s Corner: Aircraft drag reduction, Part 8 - Leeham News and Analysis
December 08, 2017, ©. Leeham Co: In the last Corner we described how the Wright Brothers developed their own engine, as there were no light engines on the market. After understanding how to design wings, how to control the... Read More
leehamnews.com
Bjorn’s Corner: Aircraft drag reduction, Part 9 - Leeham News and Analysis
December 15, 2017, ©. Leeham Co: In the last Corner, we described how the Wright Brothers developed the first theory for propellers. It was based on their wing work and allowed them to design an efficient pair of propellers... Read More
leehamnews.com
Bjorn’s Corner: Aircraft drag reduction, Part 10 - Leeham News and Analysis
December 22, 2017, ©. Leeham Co: In the last Corner, we described how the Wright Brothers flew a manned aircraft for the first time, propelled by its own power. Now we will disscuss what was known about what stopped... Read More
leehamnews.com
Bjorn’s Corner: Aircraft drag reduction, Part 11 - Leeham News and Analysis
January 05, 2018, ©. Leeham Co: In the last Corner we described a dominant drag component affecting the Wright Brothers’ Flyer, Form drag. The many wires and braces on the Flyer created separations and a high Form drag was... Read More
leehamnews.com
Bjorn’s Corner: Aircraft drag reduction, Part 12 - Leeham News and Analysis
January 12, 2018, ©. Leeham Co: In the last Corner, we described how the theory for the boundary layer was proposed by Ludwig Prandtl, and how this led to an understanding of the source of Friction drag for an... Read More
leehamnews.com
Bjorn’s Corner: Aircraft drag reduction, Part 13 - Leeham News and Analysis
January 19, 2018, ©. Leeham Co: In the last Corner, we described how the boundary layer theory lead to the understanding of Friction drag for aircraft. The mechanisms behind Induced drag was understood about the same time. Once again... Read More
leehamnews.com
Bjorn’s Corner: Aircraft drag reduction, Part 14 - Leeham News and Analysis
January 26, 2018, ©. Leeham Co: In the last Corner, we discussed Induced drag after having covered Friction drag and Form drag. These are the main drag components of a subsonic aircraft. As the aircraft flies over Mach 0.5,... Read More
leehamnews.com
Bjorn’s Corner: Aircraft drag reduction, Part 15 - Leeham News and Analysis
February 2, 2018, ©. Leeham Co: In the last Corner, we discussed the basics of supersonic flow, to prepare for a supersonic and transonic drag discussion. We will continue the supersonic aerodynamics discussion, however, as there are some further... Read More
leehamnews.com
Bjorn’s Corner: Aircraft drag reduction, Part 16 - Leeham News and Analysis
February 9, 2018, ©. Leeham Co: In the last Corner, we discussed some further aspects of supersonic flow. Now it’s time to talk about the drag created by supersonic flow on an aircraft. We will start with the full... Read More
leehamnews.com
Bjorn’s Corner: Aircraft drag reduction, Part 17 - Leeham News and Analysis
February 16, 2018, ©. Leeham Co: In the last Corner, we discussed supersonic flow and drag. Now it’s time to talk about the drag created by transonic flow on an aircraft. Transonic drag When an aircraft flies slowly, below... Read More
leehamnews.com
Bjorn’s Corner: Aircraft drag reduction, Part 18 - Leeham News and Analysis
February 23, 2018, ©. Leeham Co: In the last Corner we discussed transonic flow and drag. Now it’s time to finish the drag type discussion by adding some less dominant but still important drag types. Knowing their origin will... Read More
leehamnews.com
Bjorn’s Corner: Aircraft drag reduction, Part 19 - Leeham News and Analysis
February 23, 2018, ©. Leeham Co: In the last Corner we wrapped up the discussion on different drag types by discussing some less dominant drags. To finish the series we will go through a typical mission for an airliner... Read More
leehamnews.com
Bjorn’s Corner: Aircraft drag reduction, Part 20 - Leeham News and Analysis
March 9, 2018, ©. Leeham Co: In the last Corner, we started to go through a typical mission for an airliner and study which drag types are important when and why. We went through the take-off and climb phases,... Read More
leehamnews.com
Bjorn’s Corner: Aircraft drag reduction, Part 21 - Leeham News and Analysis
March 16, 2018, ©. Leeham News: In the last Corner, we looked at the drag of an airliner during cruise. We could see the thrust required to counter the drag in the thin air of 37,000 feet was low,... Read More
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