- 1 What’s the definition of a rule area?
- 2 What is the area rule How did it impact everyday aviation?
- 3 What do you understand by supersonic area rule?
- 4 Why does the area rule work?
- 5 What is the area of one triangle?
- 6 What is the rule of use?
- 7 What is definition of rule?
- 8 What are examples of rules?
- 9 When was area discovered?
- 10 What is a Langley lifer?
- 11 Why do you think Richard Whitcomb’s inventions were such important advances in aircraft design?
- 12 How can transonic drag be reduced?
- 13 What is the coffin corner as it relates to high speed flight?
- 14 How can induced drag be reduced?
What’s the definition of a rule area?
Note: The area rule states that the more closely the progression of the cross-sectional area of an aircraft’s body from nose to tail matches the progression of the cross-sectional area of an aerodynamically smooth, idealized shape, the less drag will be generated.
What is the area rule How did it impact everyday aviation?
The Area Rule (so-called because the formula predicted the correct ratio of the area of a cross-section of a plane’s wing to the area of the cross-section of its body) had the potential to have a greater impact on everyday aviation than supersonic aircraft, because of the thousands of aircraft whose operating speed
What do you understand by supersonic area rule?
[′er·ē·ə ‚rül] (aerospace engineering) A prescribed method of design for obtaining minimum zero-lift drag for a given aerodynamic configuration, such as a wing-body configuration, at a given speed.
Why does the area rule work?
The area rule says that two airplanes with the same longitudinal cross-sectional area distribution have the same wave drag, independent of how the area is distributed laterally (i.e. in the fuselage or in the wing). Furthermore, to avoid the formation of strong shock waves, this total area distribution must be smooth.
What is the area of one triangle?
The area A of a triangle is given by the formula A= 1 2bh where b is the base and h is the height of the triangle.
What is the rule of use?
The Rule of Use: Teach grammar in order to facilitate the learners’ comprehension and production of real language, rather than as an end in itself. Always provide opportunities for learners to put the grammar to some communicative use.
What is definition of rule?
1: to exercise authority or power over. 2: to determine and declare authoritatively especially: to command or determine judicially ruled the evidence inadmissible. intransitive verb. 1: to exercise supreme authority. 2: to lay down a rule or ruling ruled in favor of the plaintiff.
What are examples of rules?
The definition of a rule is an official regulation, code of regulations or set practice. An example of a rule is that a red light means stop. An example of a rule is an employer demanding their employees arrive at 8am.
When was area discovered?
It’s a design principle known as the ” area rule,” pioneered in the 50’s by Richard Whitcomb (who also happens to have invented the winglet), an engineer at the National Advisory Committee for Aeronautics. It’s a rule designed to minimize wave drag, which starts to appear as aircraft near Mach 1.
What is a Langley lifer?
What is a Langley lifer? The manager of Langley. Who insisted that Mary’s calculations were wrong? The manager’s input.
Why do you think Richard Whitcomb’s inventions were such important advances in aircraft design?
His development of the “area rule” revolutionized how engineers looked at high-speed drag and impacted the design of virtually every transonic and supersonic aircraft ever built. In recognition of its far-reaching impact, Whitcomb’s area rule was awarded the 1954 Collier Trophy.
How can transonic drag be reduced?
Shock waves radiate a considerable amount of energy, resulting in drag on the aircraft. This wave drag can be reduced by incorporating one or more aerodynamic design features such as wing sweep, ultra thin wings, fuselage shape, anti shock bodies and supercritical aerofoils.
What is the coffin corner as it relates to high speed flight?
In aviation, coffin corner (or Q corner) refers to the point at which the Flight Envelope boundary defined by a high incidence stall intersects with that defined by the critical Mach number.
How can induced drag be reduced?
Considering the induced drag equation, there are several ways to reduce the induced drag. Wings with high aspect ratio have lower induced drag than wings with low aspect ratio for the same wing area. So wings with a long span and a short chord have lower induced drag than wings with a short span and a long chord.