Window Maker is a free and open-source window manager for the X Window System, allowing graphical applications to be run on Unix-like operating-systems. It is designed to emulate NeXTSTEP's GUI as an OpenStep-compatible environment. Window Maker is part of the GNU Project.
Just wondering because if wings are too heavy for humans to fly couldn’t we just use rip stop nylon (the material we use for hang gliders, paragliders etc) and inflate them and then we would have wings light enough for humans to flap and fly with I don’t know why humans haven’t done this?
Hello all, i posted this on another forum but didn't get much response, I had an 18” centrifugal fan around around and wanted to see if I can push some real air to make a wind tunnel. I'm just a hobbyist, and like to build and modify cars, figured this would be something to look into.
Looks...
I am trying to understand how birds fly. If you consider a plane, using it's engine & streamline shape of the wings, it can create a low pressure region above the wings and high pressure region below and this makes it fly and the upward force is proportional to the speed.
Birds seem to flap its...
Do you thing swift birds(most aerodynamics birds; 10months in the air without landing,fastest birds in horizontal flapping flight -169km/h) have some benefits of overlaping feathers which gives rough surface?
Can planes benefits from...
While in quarantine, I've been reading a lot about some millimeter-scale flying robots, like DARPA's Nano Hummingbird and others. I'm noticing that a lot of millimeter-scale flying robots flap their wings like a fly, and I'm wondering if it's even possible to use this motion to move if the fly...
My son and i were discussing aerodynamics and he brought up a paper from https://phys.org/news/2012-01-wings.html It seems that the latest discussions seem to completely discount the differential velocity of air flow as a cause of differential pressure, but point to a differential pressure...
I just went on a Japan trip. In the airplane, besides throwing up my ball and phone, I was doing a little bit of studying. While the plane was in takeoff, in the middle of flying, and landing, I noticed how the wing positions changed.
I already know how takeoff works. It works when the plane...
Hello Everyone,
Bernoulli's equations expresses the conservation of mechanical energy for a particular fluid parcel moving inside a time-independent flow. The parcel is restricted to move and remain along a particular streamlines. The sum of the trinomial is equal to a constant on every...
Homework Statement
I have a project to research the effect of surface roughness on wing performance. I found mostly that roughness leads to increased drag on a wing, however came across a website that briefly spoke about how recently researchers have observed how carefully selected roughness...
For a conventional wings, at high speed or fast roll, the leading edge of the wings will bend downwards. This will decrease angle of attack and subsequently lift. How does AAW make the wings bend the other way round? Is it due to the materials or the shape of the wings that is designed?
If such...
Hello all!
I'm dead-set on building a pair of articulated costume wings that open and retract on their own, preferably controlled by a remote.
The actual wing design and everything else seem to be pretty simple (building the first prototype tomorrow), but I have no idea where to begin with...
Would you ever use their free WiFi on your cell phone? Wondering how safe it is and whether any precautions should be taken if I were to use it.
Anyone ever been hacked/compromised in some way using free WiFi at a place like that?
I've been there four times the past two months after never having been before.
My friends and family enjoy it.
I think it's massively overpriced for "okay" standard sports bar food and the wings aren't even that great, imo. The number of TV screens is impressive, but most sports bars will...
What is the difference between an automotive spoiler and an automotive wing? Is there a difference?
My understanding has always been that a wing is an airfoil, and is used to produce downforce, while a spoiler is is just a lip that is used to reduce drag by creating a pocket of stagnant air...
Yes it can, and surprisingly well.
Conventional wings tend to be typically:
1. Large (lots of area)
2. Thin (thickness/chord < 15%)
3. High aspect ratio (span/chord > 6)
A common example of a wingless airplane would be a lifting body.
Benefits of wingless airplanes:
1. Compact (encloses...
Wings generate lift because of the curved shape of the top wing air flow faster over the top and sucked up the plane. This would be bad for a fighter jet flying upside down. Wright brothers plane wings are flat so the wing must be deflected down. So curved wings are just aerodynamic. Soo which...
Hi everyone,
Just out of curiosity,
Will this car wing design be effective in generating downforce?
I've done some research and read that downforce is essentially the opposite of lift, so a design of an upside down airplane wing would be effective in producing a downforce - yet this car wing...
Hi guys,
I'm working on a project for school and I have measured the influence of the angle of attack, the wingspan and the speed of the air on the lift force the wing is producing. Now I have the question what these data say about real wings from planes. I've already red it has something to do...
Without a single full lengthed spar going through the whole length, how do folding wings and removable wings be designed such that they maintain structural integrity in flight and other motions involving declarations and accelerations?
For example, this is the folding wing of a Sonex Onex...
In a large passenger plane wings used to create lifting force. But in order to create lifting force, body of a plane could be used as well. In order to create as much as possible lifting force you need to have as much as possible difference between upper and down streams of air. In order to slow...
I was wondering if somebody could let me know if wings inside of a closed environment (tube of sorts) with air flowing over them would generate lift, or if the air flowing over them would be directed downwards onto the bottom of the tube, canceling any lift generated by the wings?
The first...
Hi guys, i was thinking recently people are trying to fly flapping huge great wings with no success, whilst others are flying with jet packs, so what i was thinking was adding them together. flapping smaller sets of wing assisted by a small jet pack say 2 RC jet engines producing 80-100lbs of...
Just curious as I saw a movie of one on TV
I'm trying to understand how a cruise missile can fly?
I can understand action v reaction in a rocket pushing against the mass of the earth
I can understand winged flight and air pressure holding the craft up
I can inderstand a hovercraft using...
It's just a simple question about the pressure under and over the plane's wing problem that I'm trying to answer. Well, actually I've already answered it, but one just keeps bugging me. Why don't we consider the difference in altitude of the lower and upper points of the fluid (air) when we use...
This video is very popular at the moment: http://m.wired.com/wiredscience/2012/03/human-bird-wings/ .
While there are arguments stating that it is possible: http://gizmodo.com/5894904/man-flies-like-a-bird-flapping-his-own-wings , there are also some strange visual problems with the videos...
I've been reading a bit about transonic flow and wondering if I could get a bit more info here. Exactly how do swept wings delay the on-set of Critical Mach? Is "span-wise" flow "bad", and if so, why, and how are the bad effects mitigated on current generation jet aircraft? Thanks!
http://www.flightglobal.com/blogs/the-networker/2011/08/787-is-certified-where-will-it-fly.html
The 787 incorporates some of the biggest changes in commercial aircraft construction to come along in 50 years. It is considered to be revolutionary. Most notably, it doesn't have a classic air...
Hello,
I have been watching a lot of Aircrash Investigations (also called Mayday) and it has gotten me interested in aerodynamics.
I'm curious about what force would be needed to tip a plane over? Say that there was a sudden upwards gush of wind on the end of one wing (I am familiar with...
1. I got the correct answer but I am confused about the reasoning and want to understand the concept..
"Rank from most to least, the amount of lift on the following airplane wings: a. Area 1000 m^2 with atmospheric pressure difference of 2.0 N/m^2, b. Area 800 m^2 with atmospheric pressure...
Heya Everybody! I was searching for papers on the Aerodynamic characteristics of diamond wings, I mean detailed research papers/ literatures/ E-books...as a part of my assignment cum Thesis. Unfortunately, I could'nt find many. If anyone of you could please guide me as to where I will be able to...
YouTube - Air-Flow Characteristics on a 40 Degree Swept Back Wing
the above video indicates that as the angle of attack rises the span-wise airflow rises & more probably the leading wing edges will stall first. Also notice that no appreciable change in airflow occurs at the root(attachment...
on an aeroplane, why does air fly FASTER over the top than the bottom.
I get everything else; i.e: higher pressure moves to lover pressure.
What I don't get is how the air flies faster over the curved part of the wing.
Please explain simply
thanks
My question is referring to the first picture of the SR-71 on wikipedia.
http://en.wikipedia.org/wiki/Sr-71
What are those dark streaks on the wings of the aircraft near the engine?
I had an idea I thought I would try out - the idea is based on the concept of backspin like on a tennis ball applied to create lift on an aircraft.
Instead of having wings, have a pair of back-spinning high-speed conveyor belts (the bottom of the conveyor belt goes in the direction the plane is...
In the case of a could of vapor forming on the top of a planes wing, I understand that this depends on the relative humidity, and that due to the drop in pressure above the wing (bernoulli..lift..etc), there is a drop in temperature. It is said that the drop in temperature brings the water in...
Well Last week I was on a website called the biplane forum. I posted a topic about a very serious real world problem. I own a pitts S1S aircraft. This aircraft is an experimental aircraft. Not certified. Pitts are very popular airplanes in the aerobatic world. There are many different models...
I found a sport boomerang design software from denmark and it fired my passion to learn the background and making the same of its simulations about its wings.
If you are interested search for ulf valentin and his software.
I want to know to see pressure map on a wing.
And air movement and...
I was just wondering, that if you attached a fan in the front of an airplane wing, would it fly?
If so, then how powerful would the fan need to be for a small model airplane, say 0.4m and 1kg, to fly/hover? Or if i made wearable wings, and i put them on, how powerful then would the fan have to...
I don't know if this the right spot to post this; I hope someone will help me with airplane wings. I have no idea how they work, how big they should be, or anything. Also if there is a formula to find how much thrust you need for something with wings on it to take off, or to find how big the...
Hi everyone!
I have a question for you :)
I am wondering, if there already is a developed model, imitating insect wings, e.g. bee wings. If you happen to observe them, they seem to be much more complex, but also much more useful and allow a more flexible movement. Insects fly with them not...
I was just wondering how these amazing engineering feats support the loads on their wings? Specifically the larger passenger aeroplanes.. such as the 737 and 747. The wings must undergo an extreme number of forces of great magnitude.. how do they not snap off? How the they support their own...
This is what I understand about Kelvin's Circulation Theorem
1)for inviscid (where the viscous forces are much LESS than inertial forces) AND uniform density flow, the circulation is conserved.
2)This implies (by some arduos vector calculus manipulations) that the vorticity of each fluid...
I am sure i read about experiments with wings drilled with many tiny holes, the idea i think was to break up the boundary layer, did any thing come of out of these experiments?