Questions tagged [aerospace-engineering]
Aerospace engineering is the primary branch of engineering concerned with the research, design, development, construction, and testing of aircraft and spacecraft.
285
questions
1
vote
2
answers
24
views
Assuming sufficient electrical power, is an electrolysed oxyhydrogen rocket practical?
Assume we have access to light electrical power e.g. a (hypothetical) small fusion reactor.
Is it practical to operate a water-fuelled rocket, in which water is converted to hydrogen and oxygen (or ...
- 111
0
votes
0
answers
15
views
How do I learn about Rockets and planes?
I want to learn how to make aeroplanes and rocket, how they work, etc. I want to be able to make working models. How do I go about it, what books can i read, what videos can I watch for easy, clear ...
- 1
0
votes
0
answers
7
views
How could predict the affect the of adding another element to alloy in the terms of thermal conductivity and material wear resistance?
I'm interested in the effect thermal conductivity affect and material wear resistance by adding different element to an already high thermal conductivity like GRCop-42.
My main interest are to the ...
-3
votes
0
answers
35
views
Deriving the longitudinal equations of motion for an aircraft
I'm trying to create a state-space model for the pitch control of an aircraft as described here:
https://ctms.engin.umich.edu/CTMS/index.php?example=AircraftPitch§ion=SystemModeling
The ...
0
votes
1
answer
29
views
How does one calculate the aerodynamic pressure on a spacecraft during Max Q?
Just as lift - off of a spacecraft commences, that spacecraft undergoes aerodynamic pressure. After a certain point, the spacecraft reaches Max Q or maximum aerodynamic pressure. I do know that Max Q ...
- 101
0
votes
1
answer
21
views
Characteristic scales in Thin Shear Layers Equations (Aerodynamics)
I am struggling to understand what characteristic scales mean in the context of thin shear layer equations. I am referring mostly to the following paragraph from the book "Turbulent Shear Layers ...
- 3
0
votes
1
answer
26
views
High-level sun sensor modelling for satellite
I am searching for some references on how to model at high level a sensor in terms of the statistical interpretation of the errors (bias, noise, ecc). Do someone have any reference (books or papers) ...
0
votes
0
answers
25
views
I'm Missing Something on Problem 3 in Section A5.4 of Bruhn's Analysis and Design of Airplane Structures
I've been working through the 1943 edition of Bruhn's Analysis and Design of Airplane Structures. I found an archive.org pdf version of the 1948 edition that includes answers to select problems, as ...
0
votes
0
answers
32
views
Is front shroud more thick than the lower shroud used in impellers ? Thickness of shrouds of shrouded impellers used in turbo pumps of rocket engines
This is an impeller used in turbopumps for increasing the pressure of propellants to drive the rocket engines. I wanted to ask all the engineers currently working in manufacturing of these impellers ...
- 1
1
vote
1
answer
48
views
Why do wing-tip vortices cause an induced angle of attack upstream?
My question is the following. Wing-tip vortices induce a downward flow on the root side of the wing. So, if this induction happens at the wing, and these vortices are then shed downstream, why is ...
0
votes
1
answer
45
views
Why do trailing edge flaps increase the CL,max of a wing?
I was wondering why do trailing edge flaps increase the lift co-efficient for a given angle of attack. I am guessing it has something to do with delayed flow separation, but this is quite unintuitive, ...
0
votes
0
answers
27
views
CubeSat: When designing the PID Controller of the CubeSat, what are some constraints that you need to take into account?
For a 1U CubeSat project in which we need to design the controller for it.
We decided to not include any propulsion system to keep it light, we'll just essentially drop the satellite on LEO and let it ...
- 103
0
votes
2
answers
109
views
Wind Load on conical structure
Is there a way to calculate the wind load acting on this conical cylinder?
The wind pressure blowing through the hollow conical cylinder is at 30 bar. The conical cylinder is tilted at 10 degree ...
- 1
0
votes
0
answers
51
views
How to modify a ball valve to make it cryogenic
I have designed a manual non-cryogenic ball valve in SolidWorks (based on this tutorial: https://www.youtube.com/watch?v=pYsU1gfx-00)
My aim is to modify this CAD design so that it becomes cryogenic (...
0
votes
0
answers
35
views
Fuel cell power output
I've spent innumerable time over the years looking for commercially available hydrogen / oxygen fuel cells that might actually be usable in one project concept or another. The best I've ever managed ...
0
votes
1
answer
83
views
How would I do stress analysis on a fuselage like this?
This is a frame for an RC plane that I have designed using balsa wood and prefabricated carbon fiber flat bars. It will have a balsa wood skin on the outside, but I have yet to figure out how to ...
- 3
0
votes
1
answer
39
views
When something undergoes angular acceleration (like a bar) how does the distribution of forces look along the bar?
This is something kind of explained with propellers and turbine blades but I'd love some good explanations. Thank you!
0
votes
2
answers
228
views
How does stalled diffuser/wing reduce drag at F1 car?
How stalled diffuser/wing reduce drag at F1 car if in aerodynamics stall/separation is always related to increase in drag?
Any graph of pressure distribution when diffuser is stalled?
From "...
- 239
0
votes
0
answers
40
views
In orbit rocket launch
If fuel is sent into space in bulk using space station as a "Fuel Depot", then how fast and efficient could in orbit launches of objects like probes, etc be? Rockets use huge amounts of fuel ...
- 599
2
votes
2
answers
85
views
Helical inserts on aerospace parts work intermittently
I work at a machine shop with high-volume parts and a lot of threaded holes. Common sizes are 1/4-28 STI and 10-32 STI. Every hole gets a helical insert. We have always had major issues with the 1/4-...
- 21
8
votes
6
answers
5k
views
Can we add treadmill-like structures over the airplane surfaces to reduce friction, decrease drag and producing energy?
I am curious about a method to enhance the efficiency of passenger aircraft during cruise speeds by integrating treadmill-like structures on the fuselage and beneath the wings without changing the ...
- 81
1
vote
1
answer
74
views
Jitter Experienced by Spacecraft from Reaction Wheel Imbalances
I am working on a project trying to model a satellite's pointing error caused by jitter from the reaction wheels. I have found a couple of papers (Paper 1 and Paper 2) which implement the simple model ...
- 11
0
votes
0
answers
20
views
How to estimate air velocity at turbine in turbojet?
I am designing a small turbojet. I wanted to know how to calculate the air volume expansion to predict the outlet velocity of air towards the turbine. Theoretically, I wouldn't know the flame ...
0
votes
2
answers
67
views
Can we use ion thrusters in space to relieve tension on a space elevator cable?
I suspect/hope I'm not kidding myself too much with the physics of this; it seems to stack up in my mind; but can we not relieve tension on, say, a steel cable running from a space station in orbit ...
-1
votes
1
answer
62
views
Atomic weapon design book [closed]
I’m starting my degree in nuclear engineering in September and was wondering if anyone knew any good books for Atomic Weapon design please?
- 1
1
vote
1
answer
34
views
Is there a way to 'switch OR engage/disengage' power between two different rotating shafts depending on a set RPM (wind speed)?
I'm a final year mechanical eng student, I'm working on designing a prototype of a 'Hybrid vertical axis wind turbine (VAWT)". This hybrid turbine consists of two types of VAWTs Savonius & ...
-2
votes
2
answers
67
views
Is there a table for the density, Young's modulus, and other common properties for the most common materials?
I've tried googling extensively, but I have not found a single table that contains many of the "common" materials and more than one property. Does anyone have a table from an engineering ...
0
votes
0
answers
49
views
Help relating thrust to angular velocity of helicopter in hover
Given a system consisting of an engine and propeller, I want to determine the maximum thrust it will produce when in stationary hover (no forward velocity) above the ground, and what angular velocity ...
- 1
0
votes
0
answers
17
views
What is the optimal weight ratio for a multistage water rocket?
I do know about the Tsiolkovsky rocket equation for optimising multistage rockets, however the equation requires a fixed exhaust velocity which is something that water rockets don't have, so for this ...
1
vote
1
answer
79
views
Optimizing Launch to LEO
I recently decided I would try to develop my own launch to LEO optimizer, as I have always been fascinated with the complexity of that problem. I have been using matlab, as I am very comfortable with ...
- 11