What is Flying: Definition and 243 Discussions

A flying saucer (also referred to as "a flying disc") is a descriptive term for a supposed type of flying craft having a disc or saucer-shaped body, commonly used generically to refer to an anomalous flying object. The term was coined in 1947 but has generally been supplanted since 1952 by the United States Air Force term unidentified flying objects (or UFOs for short). Early reported sightings of unknown "flying saucers" usually described them as silver or metallic, sometimes reported as covered with navigation lights or surrounded with a glowing light, hovering or moving rapidly, either alone or in tight formations with other similar craft, and exhibiting high maneuverability.

View More On Wikipedia.org
Recent contents Top users
  1. L

    Lyman in Tampa Florida. Transplanted Canadian, eh~

    Old timer in electronics. Small defense contracting business and manufacturing our own products mostly for Ship's at Sea. Ex Ship's Radio Officer, Avionics engineer, ex Marconi, traveled 65 countries, photographer, pilot, scuba. I will be 71 next month. Was long distance solo cruiser on my...
  2. P

    Is this plane flying backwards or is it an illusion?

    Can anyone explain this ? A plane is flying overhead and casting a shadow on the court. How can this shadow move backwards given we know the plane is not flying backwards ?? http://tinyurl.com/planeflyingckwards
  3. Z

    I Want To Make/Fly 10 Aircraft/rotorcraft for the price of 1

    I'm an aircraft designer who is getting into the R/C airplane flying game. I want to learn how to fly both fixed wing and rotorwing vehicles. By my last count, for me to level up from the trainer aircraft and rotorcraft to the aerobatic/racing aircraft/rotorcraft I'll need to go through anywhere...
  4. V

    Question about speed of the flying body

    I tried to find an answer everywhere but didn't found it and I am not strong at physics so please help me I need to know equations for minimum speed required for some body to fly horizontally depending on it's mass , height of fligth and distance to fly . I mean object must travel some...
  5. Q

    What is a good power source for a personal flying machine?

    Hello, I am trying to build a personal (one-manned) propulsion system that will allow individuals to fly above the trees, preferably fast, and for long amounts of time. I plan to do so using propellers. The power will need to be plentiful and long lasting. These are some options that I am...
  6. JoelN

    If no birds or flying creatures existed

    on earth. Would mankind have still built an airplane? Or even thought about flying?
  7. C

    Table saws, back tooth kickback and flying lumber

    Table saw kick-back is separated into two categories: 1) straight line kickback: when the material is pushed against the blade without perpendicular resistance applied to the material between the blade and the fence. --materiel shoots like an arrow straight back. 2) back tooth kickback: when...
  8. mootz

    Horsepower needed to lift 600 lb load, w/8 motors

    Good day Geniuses. im building a drone prototype for an agricultural project. approx. weight will be 600 lbs, using my own 8 rotor design. trying to determine rotor size and motor power required to fly such a device at 30 feet. would also be interested to determine an approximate wind speed...
  9. R

    Projectile motion of a flying object

    Homework Statement an object is thrown horizontally off a cliff with an initial speed of 7.5m/s. The object strikes the ground 3 sec later what is the horizontal velocity after 1.5 sec Homework EquationsThe Attempt at a Solution i don't know how to start this problem without an angle given
  10. B

    Calculating Induced Voltage in a Flying Airplane through Earth's Magnetic Field

    Homework Statement Assuming you know general specifications of the airplane such as span of the wings and maximum speed, calculate the voltage that is induced when the airplane is flying horizontally through Earth's magnetic field where both the horizontal component and vertical component of...
  11. T

    Observing Kerr Singularity: What Would an Observer See?

    I know it is very unlikely such thing exists because QM can prevent CTLs However, what observer would see near such singularity? As ring is timelike, for an observer it won't be a ring at all, but a point, correct? That point should be visible (naked) because there are no horizons between an...
  12. M

    Finding Pelican's Initial Speed and Distance Traveled by Fish - Can You Help Me?

    A pelican flying along a horizontal path drops a fish from a height of 4.9 m. The fish travels 7.5 m horizontally before it hits the water below. What was the pelican’s initial speed? The acceleration of gravity is 9.81 m/s^2 Answer in units of m/sIf the pelican was traveling at the same speed...
  13. O

    Flying Disk: Can Today's Tech Make it Fly?

    I have seen the experiments done by the US after world war II on tv and understand how impossible it would have been to fly a craft like that with Levers and Knobs. However, today we use electronics, like in the stealth bomber to allow for many actions to be taken which are the result of...
  14. C

    How much pressure is needed to send someone flying

    I've just started working in a workshop and I've seen these compressed air hoses that are used to clean materials and I was wondering: 1. How much pressure should the compressed air have for it to push someone? However with enough pressure coming inside that tiny outlet I believe it might...
  15. L

    Crow flying to destination (vector problem)

    Homework Statement A crow flies in two successive displacements to a point that is 80 m to the west. Its first displacement is 80 m in a direction θ1 = 65° west of north. a)What is the magnitude of its second displacement? b)What is its direction of its second displacement measured by...
  16. S

    Static air pressure for flying

    I am doing a research project about wind pressure and the different uses one can achieve by changing the pressure, volume and speed. I am comparing a hot air balloon ride vs an air plane vs human flight. I am looking and what minimum and maximum MPH is needed to achieve human flight and with...
  17. U

    Flying squirrel intercepting nut midair

    It has been a while since I graduated, so I'm a bit rusty. This is actually a real life problem, so I'm not sure the level of math needed to solve it. (Move to a different forum if appropriate.) Homework Statement A nut is rolling off a table and falling to the ground (its direction, velocity...
  18. A

    Designing a far flying catapult launched model glider

    Many of you are familiar with the catapult launched profile fuselage gliders that are sold in hobby stores. Since these tend to rather fragile, I am designing gliders with better durability out of card, and also with a full fuselage. These will have a 20 cm wingspan typically. Given that low...
  19. Maxo

    Plane Flying East-West: Time Difference Explained

    If a plane flies from point W due east to point E and then from E due west to W, does it take equally long? Why doesn't the rotation of the Earth makes it shorter going E to W?
  20. B

    Novel Flying Device: Balloon Copter

    Any reason why the balloon could not be substituted for a turbine to make a practicle flying device . One that could have comercial use. http://www.presentsformen.co.uk/science-museum-balloon-copter-prod9413/?gclid=cpdtrkvg074cfcpmtaodrnoa5g
  21. Petrus

    MHB What is the angle and rate of change when flying a kite?

    You fly a kite. The dragon is 15m away from you (measured horizontally) and moves right now straight up. The rope is rolled out with the speed of 4 dm / s, and 30m is unwound. (a) Draw a clear picture of the situation, and explain what all introduced designations stand for. (b) What is the...
  22. T

    How many hertz can kill flying house insects?

    How many hertz can kill a flying house insects...
  23. J

    Can Tesla Coils Zap Mosquitoes in Flight?

    Will the high-voltage arc from a tesla coil zap flying insects like mosquitoes if they are close enough to it but are still airborne?
  24. S

    Calculate the velocity of electron flying through electric field

    Homework Statement An electron with speed ##v_0=3/5c## flies 1m through electric field with ##E=1MV/m##. Calculate the angle of the flight when the electron exits the field and it's full energy. Homework Equations The Attempt at a Solution The velocity changes only in one...
  25. P

    The Flying Leap of the Flea: Analyzing Acceleration and Forces

    Homework Statement High-speed motion pictures (3500 frames/second) of a jumping 240μg flea yielded the data to plot the flea's acceleration as a function of time as shown in the figure (Figure 1) . (See "The Flying Leap of the Flea," by M. Rothschild et al. in the November 1973 Scientific...
  26. J

    What is the suitable capacitor value for a three level flying capacitor?

    Hi All, I would like to know what is the suitable capacitor value to be used in a three level flying capacitor(three-phase) with the input of voltage = 500V and resistance(load)=1K ohm while the inductance(load)=0.1H and also the switching frequency is 10KHz? Can someone brief me on how to...
  27. Z

    How much force does it take to send a 200lbs object flying?

    To continue the title "How much force does it take to send a 200lbs object flying hundreds of miles?" Anyway, I'm new here and amn't very good at physics but I really need an answer to this question and haven't been able to figure it out by myself. I'm sorry if it's a very stupid question...
  28. P

    What is the velocity of a flying bird on a windy day?

    A bird is flying through the air with an airspeed of 12.6m/s heading 27.7*west of north. it is a windy day with the wind blowing at 8.95m/s heading 12.5* south of west. what is the velocity of the bird as seen by the person on the ground
  29. Q

    Object flying off a rotating disc

    Why does an object on a rotating disc fly off the disc as the speed of rotation is increased? To accelerate, the object must experience a net force in the direction of acceleration -- in this case, away from the disc, perpendicular to the object's velocity vector. But what is this force...
  30. D

    What times is the bird flying horizontally/vertically?

    The flight of a bird follows the curve x=t-cos(t), y=3-2sin(t)... where 0<=t<=4pi is the time in seconds. a) What times is the bird flying horizontally? find the (x,y) coordinates of the corresponding points. b) What times is the bird flying vertically? find the (x,y) coordinates of the...
  31. J

    An asteroid flying past the moon

    I am not that great in physics, but I put a lot of effort in trying to learn it. I would really appreciate any help on this problem, since I am not even sure where to start. An asteroid is about to fly past the moon (about 384,000km away) and is on a collision course with the earth...
  32. Q

    How Does Spinning a Mass Affect Atomic Spacing in a Wire?

    I whirl a mass m attached to a wire with length L and diameter d around my head in the horizontal plane. The mass takes t seconds to move around a circle. How far do the atoms in the wire move apart, compared to their spacing at rest? Young's modulus is given. Okay, so Y = stress/strain...
  33. K

    Exploring Flying Objects: Volume & Surface Area

    Homework Statement Suppose we consider different flying objects, and that each object is characterized by a linear dimension l. Part A: Use dimensional arguments to show that the volume V scales with size as V \sim l^{3} and that the surface area scales as S \sim l^{2}. Part B: Show...
  34. J

    So why arent you weightless when flying in a plane?

    When ever your flying in a plane, doesn't it go by the same principles as, say, the moon orbiting the earth? Wouldnt the plane be in free fall and just accelerating forward to keep it up? I realize this is wrong but why?
  35. C

    Hypothetical flying and gliding animals of planets with higher atmospheric pressure

    How would they look like? Being more specific and less speculative: would higher atmospheric pressure (ex. 5 atm) mean that it is easier to fly/glide because lower wingspan would allow to achieve the same lift? Or it would be actually harder, because denser atmosphere would mean higher drag...
  36. M

    Force of Bullet Sending Person Flying Backwards

    I'm proving that the force of a bullet is not actually enough to send a person flying backwards like you see in the movies. These are the variables I have so far. I'm not sure if all of them are really necessary to solve this. distance between gun and person getting shot = 2.45 m mass...
  37. P

    How Do You Calculate a Jet's Average Velocity and Change in Velocity?

    Homework Statement A jet is flying at 600 mi/h in a direction of 45 degrees North of West. 2.5 minutes later it is flying at 450 mi/h in a direction of 30 degrees North of East. a) Sketch a vector diagram labeling Vi, Vf, and ∆V. b) Calculate the average velocity vector in unit-vector...
  38. A

    A pelican flying along a horizontal path

    a pelican flying along a horizontal path... A pelican flying along a horizontal path drops a fish from a height of 5.4 m. The fish travels 8.0 m horizontally before it hits the watwe below. What was the pelican's initial speed? Well I'm guessing that y =-5.4m and x= 8.0 m...what do I...
  39. N

    A plane flying at 220m s-1 at a height of 300m

    This is a question about projectiles A plane flying at a constant speed of 220m s-1 at a height of 300m. The pilot drops a food package to hit a certain target. a)How long (in time) before passing over the target should the pilot release the package? b)How long in metres would that be? S =...
  40. M

    Two explosions occur, spaceship is flying overhead at 0.6C, which occurs first?

    Homework Statement At 11h 0m 0.0000s AM a boiler explodes in the basement of the Denver Science Museum. At 11h 0m 0.0003s, a similar boiler explodes in the basement of a ski lodge in Aspen at a distance of 150 km from the first explosion. Show that in the reference frame of a spaceship moving...
  41. R

    Mass or attractive force responsible for not flying away

    Physicist say because of mass particles do not fly off else they wouldn't have formed atom. I can understand because of mass particles slow down but it is due to attractive force particles are bound together.
  42. E

    What kind of engine do I need to build a flying board ?

    What kind of engine do I need to build a "flying board"? Hi there, I'm pretty much new here and I've been making lots of research about engines, ion engines, turbines etc. But I still don't understand. I want to build a steel board, since I have the facility to work with any kind of metal...
  43. S

    An unguided weapon is launched off a fighter aircraft flying at 500kts

    An "unguided" weapon is launched off a fighter aircraft flying at 500kts An "unguided" weapon is launched off a fighter aircraft flying at 500kts (844 ft/s) straight and level at an altitude of 4,000 ft above ground level. The weapon is released from the aircraft with an initial velocity of 10...
  44. T

    Electromagnet stick is the key to build a flying disk

    The electromagnet stick always head N/s, no matter how fast the rotation of the shell of the disk is, you just need to control the input voltage of it, and it will not get heavy if the Magnetic stronger. I think the input higher voltage can make it head with power and hard to change the...
  45. P

    Physics behind a fan based flying car concept

    Homework Statement For decades, people have dreamed of cars that can fly. You are part of a team which hopes to build the worldʼs first commercial flying car. Your proposed design has four fans, each of radius 50cm. Each fan sucks in air from above the car and blows it downwards. The...
  46. B

    What holds conducting electrons from flying off into vacuum

    In a conductor suspended in an external electric field, in a vacuum, what holds the conducting electrons inside the conductor? Why don't they just fly off into space, under the influence of the field? If they are free enough to move between the atoms of the conductor, this means the force from...
  47. P

    Flying object in the sky over Paris

    is it real? Edit: removed spam link.
  48. T

    Can a yoyo spin like spintop while flying around the air?

    modern metal yoyo with ball bearing works totally different with the old. it can spin about 5mins within one throw for some reason. and can it spin about 1min if I throw it horizontally? you may wonder about what is a horizontal throw. then see the video post below. https://vimeo.com/39247415...
  49. J

    A plane is flying through the air at a velocity 88km/hr

    Homework Statement A plane is flying through the air at a velocity 88km/hr direction N37'E on a day when there is no wind. a) After 50 minutes, how far has the plane gone? b) How far east is it from it's starting point? c) How far north is it from its starting point? If there is a...
  50. G

    Is a Flying Skateboard Possible with Current Technology?

    I was just wondering if a flying skateboard would be possible to make in this time and day. I don't mean a hover board which uses anti-gravity mechanic, but a flying skateboard which uses a turbojet engine. I really want to make one, but I am not sure if it is even possible in the first...
Back
Top