Name 3 reference surfaces of wings and tail planes
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For what do you have to watch out whilst calculating the reference surface?
Name 4 reference surfaces of rudders and flaps
Name 11 parameters for the wing calculation:
Refering the mean aerodynamic chord (MAC), what makes the aerodynamic calculation of the wing more difficult ?
Which equation provides remedy ?
Which assumption has to be made ?
Atmosphere
Define to 3 state variables and 2 dependencies in the earth atmosphere:
Name 3 layers in the earth atmosphere:
What is ISA ?
Why do we need ISA ?
Name the 5 assumptions the ISA-model is based on:
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Name the ISA basic data for calculations:
Which 2 steps for calculating atmospheric data according to the ISA-model must generally be taken into account ?
Temperature profile according to ISA
Name the formula:
Define the 3 intervalls:
Picture the graph:
Pressure and density curve according to ISA
Name the formulas for pressure and density for the troposphere:
Name the forumulas for pressure and density for the lower stratosphere:
Pressure and Density Curves according to ISA
Picture the curves in the different layers of atmosphere and name for each layer the formula for pressure and density.
Name the barometric formula.
What can be calculated with the barometric formula ?
Aircraft control
Which forces, moments and velocities are reacting with the aircraft body ?
How many degrees of freedom are existing ?
Roll control
Around which axis is the aircraft rotated ?
What is the technically main element for this rotation ?
Pitch control
Yaw control
Aircraft Forces
Name the 4 attacking forces for the aircraft body:
Define the 2 equilibriums between those forces:
In which two components can the resulting air forces be decomposed ?
Point of attack
Which 3 different points of attacks exist and what force is resulting the attack in each case ?
Where must the aerodynamic center be located in terms of static longitudinal stability ?
What are the conditions for AC (Aerodynamic Center) and CoG (Center of Gravity) and static longitudinal stability ?
What does the lift coefficient CL describe ?
Name the formula
What are the forumulas for the drag coefficient and pitching moment coefficient?
Picture the lift coefficient (CL) and drag coefficient (CD) in a Lilienthal polar plot and in a Resolved polar plot
Similarity
Why is similarity of flow processes (fluid mechanic) of great importance ?
What does the Mach number measure ?
How is the formula defined ?
What does the Reynold’s number measure ?
Organise different flight objects in a diagram in dependency of velocity and Reynold´s number
Which 4 possibilities do exist to ensure the similarity in wind tunnel tests with high Reynold numbers ?
Froude number
Strouhal number
Prandtl number
Nusselt number
Euler number
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