Spherical Trig Basics
... If we know the angles a, A, and b, then we can solve for the angle B by the Law of Sines ...
... If we know the angles a, A, and b, then we can solve for the angle B by the Law of Sines ...
Secondary wave lift degradation
... Present Aerodynamic Acceptance Test (AAT) for de/anti-icing fluids is defined in SAE Aerospace Standard AS 59001. The flight tests and extensive wind tunnel tests that formed the scientific basis of AAT considers predominantly lift coefficient degradation caused by de/anti-icing fluids. The reasonin ...
... Present Aerodynamic Acceptance Test (AAT) for de/anti-icing fluids is defined in SAE Aerospace Standard AS 59001. The flight tests and extensive wind tunnel tests that formed the scientific basis of AAT considers predominantly lift coefficient degradation caused by de/anti-icing fluids. The reasonin ...
The lift of a wing is proportional to the amount of air diverted down
... the real world, the “vortex system” set up around a wing is both real and observable; the trailing vortex sheet most noticeably rolls up into wing-tip vortices. The upper stagnation point continues moving downstream until it is coincident with the sharp trailing edge (a feature of the flow known as ...
... the real world, the “vortex system” set up around a wing is both real and observable; the trailing vortex sheet most noticeably rolls up into wing-tip vortices. The upper stagnation point continues moving downstream until it is coincident with the sharp trailing edge (a feature of the flow known as ...
Study Questions - Bryan Weatherup
... How Does Spiral Divergence Occur? Spiral Divergence occurs when an airplane has strong directional stability and weak lateral stability. Which weights more, a pound of feathers or a pound of steel? Neither, they weigh the same. What causes Dutch Roll: It is the result of strong lateral stability and ...
... How Does Spiral Divergence Occur? Spiral Divergence occurs when an airplane has strong directional stability and weak lateral stability. Which weights more, a pound of feathers or a pound of steel? Neither, they weigh the same. What causes Dutch Roll: It is the result of strong lateral stability and ...
what is angle of attack?
... its simplest form, lift is a function of speed, air density, wing area, and AOA. At a given airspeed, as the AOA of a wing is increased, lift also will increase (fig. 1). Therefore, at the same airspeed, a heavy airplane of the same configuration must fly at a higher AOA than a light one. Conversely ...
... its simplest form, lift is a function of speed, air density, wing area, and AOA. At a given airspeed, as the AOA of a wing is increased, lift also will increase (fig. 1). Therefore, at the same airspeed, a heavy airplane of the same configuration must fly at a higher AOA than a light one. Conversely ...
Aerodynamics
... Three Factors That Limit Radius of Turn AERODYNAMIC – Occurs when airplane turns at it’s stall velocity ...
... Three Factors That Limit Radius of Turn AERODYNAMIC – Occurs when airplane turns at it’s stall velocity ...
Introduction to Aeronautical Engineering
... not the Earth's surface. When the aircraft encounters a sudden change in the ambient air velocity — a transient gust — inertia comes into play and momentarily maintains the aircraft velocity relative to the Earth or – more correctly – relative to space. This momentarily changes airspeed and imparts ...
... not the Earth's surface. When the aircraft encounters a sudden change in the ambient air velocity — a transient gust — inertia comes into play and momentarily maintains the aircraft velocity relative to the Earth or – more correctly – relative to space. This momentarily changes airspeed and imparts ...
pdf
... exponents) without changing their nondimensionality. Your s should be reducible to the following relationship: CL CL Re, Ma, ...
... exponents) without changing their nondimensionality. Your s should be reducible to the following relationship: CL CL Re, Ma, ...
Word
... exponents) without changing their nondimensionality. Your s should be reducible to the following relationship: ...
... exponents) without changing their nondimensionality. Your s should be reducible to the following relationship: ...
Principle of flight
... the angle of bank increases, it will drop sharply below the horizon and the aircraft begins a spiral decent. The condition immediately precedes the spin and is referred to as an INCIPIENT SPIN. ...
... the angle of bank increases, it will drop sharply below the horizon and the aircraft begins a spiral decent. The condition immediately precedes the spin and is referred to as an INCIPIENT SPIN. ...
Week 7 Lecture
... • When stall speeds are calculated for aircraft operating manuals they often assume the worst case to produce conservative numbers – Often you can fly below the listed stall speed without stalling. Especially if you have power on and are below the maximum weight – You may still manage to stall the a ...
... • When stall speeds are calculated for aircraft operating manuals they often assume the worst case to produce conservative numbers – Often you can fly below the listed stall speed without stalling. Especially if you have power on and are below the maximum weight – You may still manage to stall the a ...
PGR10 Poster NilsHaack
... The main factor in wining sailing races is the up-wind performance of the boats. In the C-Class this lead to the development of wings instead of the conventional soft sail. For the up-wind performance it is imperative to set up the wing for a high lift/drag ratio to generate as much Driving force as ...
... The main factor in wining sailing races is the up-wind performance of the boats. In the C-Class this lead to the development of wings instead of the conventional soft sail. For the up-wind performance it is imperative to set up the wing for a high lift/drag ratio to generate as much Driving force as ...
Basic Aerodynamics - Dartmouth Flying Club
... However, more lift on one wing creates more induced drag on that wing: adverse yaw. Adverse yaw is corrected by rudder application. Frise ailerons counter adverse yaw: ...
... However, more lift on one wing creates more induced drag on that wing: adverse yaw. Adverse yaw is corrected by rudder application. Frise ailerons counter adverse yaw: ...
Aerodynamics
... Indicated airspeed - simply the airspeed that is read off the airspeed indicator. The raw speed. Calibrated airspeed – The airspeed corrected for instrument and position error. Errors occur from limitations where the pitot tube is located, or even where the static port is placed. Equivalent airspeed ...
... Indicated airspeed - simply the airspeed that is read off the airspeed indicator. The raw speed. Calibrated airspeed – The airspeed corrected for instrument and position error. Errors occur from limitations where the pitot tube is located, or even where the static port is placed. Equivalent airspeed ...
8.Conclusions (1/2)
... 8.Conclusions (2/2) c. This increase can be attributed to the anticipated velocity ...
... 8.Conclusions (2/2) c. This increase can be attributed to the anticipated velocity ...
Stall (fluid mechanics)
In fluid dynamics, a stall is a reduction in the lift coefficient generated by a foil as angle of attack increases. This occurs when the critical angle of attack of the foil is exceeded. The critical angle of attack is typically about 15 degrees, but it may vary significantly depending on the fluid, foil, and Reynolds number.Stalls in fixed-wing flight are often experienced as a sudden reduction in lift as the pilot increases the wing's angle of attack and exceeds its critical angle of attack (which may be due to slowing down below stall speed in level flight). A stall does not mean that the engine(s) have stopped working, or that the aircraft has stopped moving — the effect is the same even in an unpowered glider aircraft. Vectored thrust in manned and unmanned aircraft is used to surpass the stall limit, thereby giving rise to post-stall technology.Because stalls are most commonly discussed in connection with aviation, this article discusses stalls as they relate mainly to aircraft, in particular fixed-wing aircraft. The principles of stall discussed here translate to foils in other fluids as well.