# Questions tagged [aerospace]

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### What are the main subjects covered in an aerospace engineering degree course?

Suppose someone wanted to self-study by reading some of the main textbooks that are covered in an undergraduate degree on aerospace engineering. What are the main topics that are covered? (As ...
1k views

### Can one tell if a craft is a lifting body or a flying wing just by looking at it?

Recent news that the "reusable lifting-body spaceplane" Dream Chaser has arrived at Kennedy Space Center and may launch in August launched led me to read Wikipedia's Lifting body which ...
• 5,934
41 views

### induced drag at supersonic speed [duplicate]

for a delta wing with supersonic leading edge at small angle of attack there is no stagnation point on leading edge so There is no connection between the top and bottom of the wing. Therefore, the air ...
• 113
41 views

### Why is the wave drag of a straight wing less than that of a swept back wing?

According to NASA's claims, when the swept back wing is inside the shock cone and the shock is not attached to the leading edge of the wing(subsonic leading edge), the wave drag of the swept wing is ...
• 113
43 views

### What is the speed and temperature profile of the boundary layer at the stagnation point?

At the statgnation point where the air velocity is zero, what is the shape of the velocity and temperature profile of the boundary layer? Is the velocity profile of the boundary layer in the form of a ...
• 113
115 views

### Does lift decrease in hypersonic speed?

In John Bertin's Aerodynamics book, it is said that when the thickness of the boundary layer is low, the displacement thickness of the boundary layer is also low, and therefore the curvature of the ...
• 113
333 views

### How to convert aircraft position from GPS to Local Tangent Plane (NED) coordinates?

Do these conversion formulas look correct? I'm writing my own local navigation script in Python, and I want to ensure that my understanding of the underlying math is solid. Reference location ...
1 vote
461 views

### How are flaps and the elevator positioned in cruise?

so I understand that an elevator is used to maintain cruise (straight level and unaccelerated flight) but I’m curious now about how the flaps and elevator is positioned whilst an aeroplane is trying ...
• 87
276 views

### How exactly is cruise maintained as fuel is burnt?

Can someone please explain how exactly cruise (I think it’s called straight, level and un-accelerated flight) is maintained for like an airliner please? I’ve read a few answers on this website for ...
• 87
132 views

### When doing calculations with TSFC of multiple engines, do we add all TSFCs together?

I'm doing an assignment at the moment where I need to evaluate FOMs based off some characteristics of an aircraft. One of the parameters I need to evaluate is the best milage, which I'm doing like so: ...
1 vote
450 views

### why lift coefficient decreases at supersonic flow?

In Anderson's performance book, he wrote that the higher the speed, the greater the pressure difference between two points, and as a result, the lift coefficient is greater. But when we reach the ...
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249 views

### effect of wing chord length on lift coefficient

In the bertin's Aerodynamics book It is written that reducing the wing chord increases the lift coefficient( decreases stall angle) and as a result, the wingtip stalls earlier than the wing root how ?
• 113
44 views

### what is the effect of cone back pressure on shock wave angle?

this is a part of anderson's book : "Note that, for a given cone angle θc and given M∞, there are two possible oblique shock waves—the strong- and weak-shock solutions. This is directly analogous ...
• 113
154 views

### Pitch control in PX4 autopilot

I am trying to translate controller diagram of fixed wing px4 attitude control into mathematical form. While going through the controller diagram Fixed-Wing Attitude Controller looking into PX4 github ...
94 views

### why induced drag decreases in supersonic speed?

In John Bertin's book Aerodynamics, it is written that the induced drag at subsonic speed decreases with the increase in wing aspect ratio but the opposite happens at supersonic speed so that in ...
• 113
1 vote
111 views

### Is it possible to work for free in Aerospace Industry for experiences

I am currently in a master's Aerospace Engineering program and are trying to buff up my resume by having some experiences. I heard that in IT industry, there are ways for new programmers to earn ...
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105 views

### Introduction to aircraft performance [closed]

How do determine the power available and the power required for an aeroplane in a steady level flight=
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338 views

### Change of absolute ceiling with weight

Let's say an aircraft has an abs ceiling of some value at the start of its cruise and then it consumes some percentage of its fuel during cruise. How will this change the new abs ceiling at the end of ...
617 views

### Could the Wright Flyer II takeoff without wind?

The Wright Flyer II could reach about 20 mph of airspeed on the track alone. The aircraft needed an airspeed of about 30 mph to make a proper takeoff (without hanging in ground effect). Before the ...
1 vote
108 views

### Why pressure and temperature decreases along the length of a convergent nozzle?

I know that the pressure and temperature follows stagnation relations of pressure and temperature as well as area mach relation inside a convergent nozzle along the length. And according to that ...
1 vote
93 views

### Variables of Dryden Wind Model

How to determine the turbulence intensities (σu, σv, σw), scale lengths (Lu, Lv, Lw) & Angular frequency (ω0) in the given Dryden wind model to generate wind speeds (u_w, v_w, w_w) of civil jet ...
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170 views

### Would mid-air refueling for an air-to-space vehicle that flies like a plane be a viable advantage if the tech was available? [closed]

Let's take the style of an F-22 Raptor (awesome!), build the fuselage, wings, etc to handle runway takeoff horizontally and then vertically (if needed) up to orbital space flight to reach the ISS in ...
2k views

### Relation between lift force and torque produced in propeller used for vertical take-off and landing aircrafts

There are many answers for this question but none of them are specific. I need to find the exact relation between the lift force of a propeller of specific pitch, attack angle , dimensions and ...
129 views

### What are "secondary precessional forces" that apply to boomerangs in flight?

note: This question is about the aerodynamics of boomerang flight and how it differs in microgravity environments. Some background information available here in Aviation SE: Are frisbees and ...
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