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Transportation Systems Overview
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Transportation Systems Overview
Transportation Systems Overview
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1
Question
How does the longitudinal placement of the wing influence the aircraft?
Answer
It affects the force and moment balance over the whole flight envelope.
2
Question
What is the role of wing location in aircraft configuration?
Answer
It influences interference drag, lateral roll stability, visibility, and landing gear position.
3
Question
How are aerodynes classified?
Answer
Aerodynes are classified into fixed wing and rotary wing configurations.
4
Question
What are the main components of Earth's atmosphere by volume?
Answer
Approximately 78% Nitrogen (N2), 21% Oxygen (O2), 1% Argon (Ar), and 0.044% trace gases, with Carbon Dioxide (CO2) being the main contributor.
5
Question
How can the date of the table be sorted?
Answer
The date can be sorted by values of a column, e.g., by the Maximum Take-Off Weight (MTOW).
6
Question
What is the rule of thumb regarding the costs of private-owned cars?
Answer
The acquisition costs of a car, defined by its price tag, equals the fuel costs over its lifetime.
7
Question
How does water content in the air influence atmospheric effects and temperature distribution?
Answer
The water content of the air greatly influences atmospheric effects and temperature distribution.
8
Question
What is the effect of the weight of a vehicle on its fuel efficiency?
Answer
The vehicle's total weight changes over the mission/drive cycle, as fuel is consumed, impacting the overall efficiency calculations.
9
Question
What happens to atmospheric pressure with rising altitude?
Answer
The pressure of the atmosphere decreases with rising altitude, asymptotic to zero.
10
Question
What is the MTOW of the 737300 aircraft?
Answer
56470 kg.
11
Question
How does the average distance traveled per year differ among vehicle classes?
Answer
Average distance varies greatly between vehicle classes, with cars averaging 14,260 km per year, while heavy trucks average 41,060 km.
12
Question
What is the error received when trying to concatenate the table variables MTOW and Name?
Answer
Error: Cannot concatenate the table variables MTOW and Name, because their types are double and cell.
13
Question
What happens to CL slope with decreasing aspect ratio of a finite span wing?
Answer
The CL slope decreases.
14
Question
What is the pressure coefficient (Cp)?
Answer
The pressure coefficient (Cp) is defined as Cp = (p - p0) / (0.5 * ρ * V²), where p is the local static pressure, p0 is the freestream stagnation pressure, and ρ is the air density.
15
Question
What does varfun do in MATLAB?
Answer
varfun applies a function to specified variables in a table.
16
Question
What is the expression for the Mach number?
Answer
Mach number (M) is defined as M = V/a, where V is the flight velocity in m/s and a is the local speed of sound in m/s.
17
Question
What is the initial service date of the A300600R aircraft?
Answer
1974.
18
Question
What are common secondary airfoil properties?
Answer
Common secondary airfoil properties include: - Maximum thickness to chord ratio (TC) - High lift capability (CL,max) - Stall characteristics - Moment (CM) of the airfoil - Supersonic capabilities - Good behavior with shape anomalies - Ability of shape deformation for active lift control.
19
Question
How can data entries in a Matlab table be accessed?
Answer
Data entries can be accessed directly by their row number in the table.
20
Question
What are the two main categories into which airborne vehicles can be separated?
Answer
Lighter than air vehicles (balloons, airships, and blimps) and heavier than air vehicles (aerodynes).
21
Question
What does 'NaN' signify in a dataset?
Answer
NaN signifies missing or undefined data.
22
Question
What is the Reynolds number equation?
Answer
The Reynolds number (Re) is defined as Re = (u0 * l0) / ν, where u0 is the flow velocity, l0 is the characteristic length, and ν is the kinematic viscosity of the fluid in m²/s.
23
Question
How can airflow be influenced during flight?
Answer
By using active flow control methods such as blowing or sucking air or plasma generation.
24
Question
How can the speed of sound (a) be calculated under the assumption of an ideal gas?
Answer
The speed of sound (a) can be calculated using the equation a = √(R*T), where R is the specific gas constant (J/(kg*K)) and T is the local temperature in Kelvin.
25
Question
What is the average fuel consumption of a private car according to the text?
Answer
The average fuel consumption is 6.0 liters per 100 km.
26
Question
What is the influence of dihedral on lateral roll stability?
Answer
Natural stable high-wing airplanes may have negative dihedral, whereas more lateral unstable low-wing airplanes often have small positive dihedral.
27
Question
What are the main components of transportation systems?
Answer
Transportation systems consist of transportation vehicles, the needed infrastructure, and the operators.
28
Question
What is the purpose of 'GroupCount' in the computed mean fuselage cross-section?
Answer
It shows the number of occurrences for each group.
29
Question
What are typical commands used to summarize or manipulate MATLAB tables?
Answer
Commands include .Properties, summary, sortrows, varfun, and rmmissing.
30
Question
What is the command to sort rows in MATLAB?
Answer
sortrows.