Jet Definition and 316 Threads

Homework Statement A fighter jet is launched from an aircraft carrier with the aid of its own engines and a steam-powered catapult. The thrust of its engines is 3.14 x 10^5 N. In being launched from rest it moves through a distance of 85.1 m and has a kinetic energy of 5.63 x 10^7 J at...

O.k i understand that a jet engine gains its thrust by pushing heated air out its nozzel, but i was wondering if that the reason it goes forward is because the speed of it being released out the rear nozzel is moving faster than the air can get pushed out of the way so the some of the force is...

Can anyone tell me some formulae that i can use for finding the thrust in a remote control turbojet engine if the area of the intake is 196.35cm square and the exhaust is 78.5cm square and the pressure increases by 31 times?

Homework Statement In an inkjet printer, letters are built up by squirting drops of ink at the paper from a rapidly moving nozzle. The pattern on the paper is controlled by an electrostatic valve that determines at each nozzle position whether ink is squirted onto the paper or not. The ink...

To go off on a tangent - I am watching a discovery channel program about the F22 fighter. A pilot (who looks about 15) is describing how the aircraft's engine is unique because it can vector thrust for manouverability and can fly supersonic without afterburner. I suppose that's true now that...

I must admit. I am slowly becoming a tech junkie. I have office 2007, and its great. I use microsoft outlook to link to my msn mail and my school email -sweet. I also downloaded Internet Explorer 7, really really nice program. I have 7 home pages that all load up each time I open IE and it...

Homework Statement A Boeing 747 "Jumbo Jet" has a length of 59.7 m. The runway on which the plane lands intersects another runway. The width of the intersection is 29.9 m. The plane decelerates through the intersection at a rate of 6.33 m/s2 and clears it with a final speed of 42.3 m/s. How...

Hello. I do not really understand how to solve these problems and was hoping that you could help/explain them to me. Thanks. 1. A fighter plane moving 200 m/s horizontally fires a projectile with speed 50.0 m/s in a forward direction 30 degrees below the horizontal. What is the speed of the...

ok, I am not a physics student, engineer, or mathematician, but i have an idea i need to know will work or not. we've all undoubtedly seen star wars ep 1 with the podracer race...floating engines. would an alternator connected to a turbojet produce enough voltage to power an ion lifter? are...

An aircraft carriers capapult accelerates a 2000-kg jet aircraft from rst to a lauch speed of 320m/s in 2.0s. a) The net force on the plane is ? b) the length of the catapult is ? F= m/a Lenght= at^2/2 vf=vo*at 320m/s= (0) * a * 2.0s a= 160 m/s F= 2000kg *...

Quick Question...If a supersonic jet passes directly in front of you and you are infinitely close to the jet (there is no distance between you and the jet theoretically), would you hear the jet as it passes you or after it has already passed you? I think you would hear it as it passes...

Hi, my mate has just left school and wants a career in jet propulsion or aircraft structure, he lives in plymouth (uk) and don't have any A to C grades... what would you recommend his best route is? and what decent colleges are there that specialize in this sort of thing?

Homework Statement Joe, whose mass is 80kg, takes off across level snow in his jet powered skiis. The skiis have a thrust of 186N and a coefficient of kinetic friction on snow of 0.1. Unfortunately, the skiis run out of fuel after only 8 s. What is Joe's top speed? How far has Joe traveled...

Future Horizons Hoverboards - Flying Saucers - Jet Packs http://www.futurehorizons.net/ I think the TV program "Mythbusters" debunked the JetPack design, but why should they have all the fun? Come on guys and gals, rip these guys a new one. :lol: I think the Flying Saucer actually has a...

I had an idea once which I'd like to go into a little. It involves how a fan or propeller draws in air verses only providing thrust. The idea is/was to cut down on aerodynamic drag and resistance a propeller imposes once the craft is up to speed. By having a remote fan/propeller air intake...

FYI: http://www.rutherford-research.ca/rrx/aerospace/nextGenPropulsion.php Click link above to see pictures and description.

Homework Statement it told: 1. Water is forced out of a fire extinguisher by air pressure 2. the water level in the tank is 0.500 m. below the nozzle 3. find gauge air pressure in the tank (above atmosphere) for water jet to have speed of 30.0 m/s Homework Equations...

last year i did a jet engine workshop n one of the instructor there told us that both the engines on an aircraft(ofcourse an aircraft with an engine on each wing or maybe more on each) are run in same direction(i mean same sense of rotation) n this induces a transeverse force of the aircraft...

Hi all, This has been bugging me all day, so I thought I'd seek the help and advice of the internet. When a plane is stationary, you’d have to say that its jet engines are doing no useful work. The engines apply a static force on the airframe and could be said to be running at zero...

A Jet Engine doubt... Hi folks... My aerospace propulsion professor taught me that, in the combustion chamber of a jet engine, during combustion, the pressure instead of increasing, decreases. I have 2 questions. 1) Is it true? 2) If yes, how? How and in what way does temperature, and...

i was reading about pulse jets and ram jets as part of my course on jet propulsion. all i was told was that they are aero-thermo-dynamic-ducts. couldn't understand what they mean. checked google, but the articles i got were vague. could someone explain what aero-thermo-dynamic-ducts are?

1. One type of ink-jet printer, called an electrostatic ink-jet printer, forms the letters by using deflecting electrodes to steer charged ink drops up and down vertically as the ink jet sweeps horizontally across the page. The ink jet forms 30.0 (mu)m diameter drops of ink, charges them by...

Here is a link to videos of it: http://www.jetpackinternational.com/video.html" Can anyone give me information about this thing? Like how it works and what does it use for fuel.

I have several questions concerning M87's jet: 1. From observations by the HST of the jet, its speed was determined to be several times faster than that of light. The superluminal effect has been attributed to visual effects, a conclusion I do not dispute. However, I do not understand how...

can anybody please tell me the temperature (degrees Celsius please.) there is at the back of a normal turbine jet engine (or something like that:-p )?? i couldn't find it on wikipedia or something like that:frown: so i ask it here:approve:

Typical supersonic airplane in supersonic flight creates 2 shock waves (2 Mach cones): "N-shaped" shock wave. How much of the "sound" energy near the shock waves region is contributed by the sound emmited from jet engines work?

Homework Statement Calculate the engine thrust required to produce an acceleration of 4 m/s^-2 in a jet of mass 800 kg as it takes off along the runway. The air resistance is 500 N Appreciate if anyone can check if I have used the correct equation, and my answer. Homework Equations F - R...

http://www.cnn.com/2007/TECH/01/16/airline.anti.missile.ap/index.html?eref=rss_topstories

The intensity of the sound wave from a jet airplane is 9.00 W/m2 at a distance of 4.8 m. At what rate does the jet airplane radiate energy in the form of sound waves? Assume that the sound wave radiates from the airplane equally in all directions. I am having trouble starting this problem...

What is the shelf life of jet fuel especial for JP-5? How to predict it? My homework ask me to write topic about this but I don't have any idea. Is that correct for the 4 years of the shelf life of JP-5?

Bicycle "Jet" Backpack http://www.netscape.com/viewstory/2006/10/04/propeller-propulsion-to-use-with-your-bicycle/?url=http%3A%2F%2Fwww.kirou.com%2F2006%2F10%2F04%2Fpersonal-jet-pack%2F&frame=true Pacific Wind homepage http://www.personalpropulsion.com/products.htm

Hw Help! I'm struggling with 3 problems, can anyone help me out? (1)You are riding on a jet ski at an angle upstream on a river flowing with a speed of 2.8 m/s. Suppose the jet ski is moving at a speed of 11 m/s relative to the water. At what angle must you point the jet ski if your velocity...

Cool RC Jet stuff, but out of my price range. :frown: They are about 10-20k per airplane. [PLAIN]&mode=related&search=[/URL] But worth every penny. [PLAIN]&mode=related&search=[/URL] Inside the jet, pretty neat...you can really hear that jet engine spool up in flight. [PLAIN][/URL]

Hello, I'm Arman, new user here. I'm a jet-engine designer and I'm really interested in building and running different types of jet engines. I have quetion now: Some amount of air enters a cone shaped pipe with a minimum diameter of 6 cm and a maximum diameter of 10 cm, and a length of 7 cm...

the pain threshold of your ears is about 130 phon.The sound levelclose to a jet (r=1m) when it takes off is about 150 phon.How far do you have to go away in order to lower the intensity level below the pain threshold?? anyone pls tell me the formula to use so that i can calculate as i can't...

Aside from early diesel engines, does anyone know of brayton-cycle engine that uses a positive displacement compressor rather than an aerodynamic one?

In the general thrust equation in order for a jet engine, either turbojet, ramjet, or scramjet, to produce net thrust the speed of the exiting exhaust has to be greater than the incoming speed of the air flow. Then the net thrust is the mass exhaust rate times exhaust speed minus the air mass...

Would a Rigid Dirigible or Rigid Blimp setup with Scrams Jets be sufficient to reach space?

i found this on another messageboard and couldn't find an answer. any help? Question about jet engines... From: Bisected8 | Posted: 2/6/2006 9:26:42 AM | Message Detail | #001 Is the fuel used to move the fans by way of an internal combustion engine (thus compressing the air and forcing it...

http://www.youtube.com/w/Fearless-MV?v=fp2atxNeVDU&search=jet%20li This is a nice video for jet li fans... but its also, for me, says something about American music lately. For most of the music video... if i didn't see the chinese (or whatever) captions at the bottom, i really wouldn't have...

:confused: A gentlemen on another site, not related to physics stated the following: [moderator removed personal information of third: indeed something that is inappropriate without consent] Bullet speed is relative. A .22 long rifle compared to the .22-250 is a great example. The SR-71...

https://www.physicsforums.com/newthread.php?do=newthread&f=149 my blog post about this: http://maskedslacker.blogspot.com/

OK I have question about the way jet engine works. I am only 16 and haven't got into any of this stuff in hs yet. my buddy and I were having a disscusion about the way a jet and rockets work and got stump by something. I looked up online how they both work and heard of people refferring to a...

This pic is really cool, it looksl ike a cloud. I'm only 17, so don't know much physics, i hope someone can explain this in an easier way. Why does it look like a cloud

Jet Blue is outsourcing maintenance to El Salvador 145 People traveling on Jet Blue can thank a skilled pilot for avoiding what could have been a tragedy yesterday. Jet Blue is one of the airlines which out sources the maintenance of its planes to unlicensed mechanics in El Salvador...

Hi guys! I need your help on the following: 1. what is the formula in getting horizontal and vertical component - force and angle? 2. What remedial emeasures are taken by technicians and scientist to prevent jet fighter pilots from blacking out or experiencing red-outs due to high turns?

Has anyone here ever built a small Jet engine? Just generally interested in how you did it and from what parts thanks

For those with a strong death wish only.

Hi, Sometimes when a jet plane is flying above you you can see the white tail from the motors, and sometimes not. What is the reason for this? Why isn´t this visible all the time? regards t.

I half remember that jet engine intakes were circular a few years ago. Now they have a squashed appearance with the bottom part quite flat. This isn't new as the first German jet at the end of World War II had the same shape but it seems relatively new on airline jet engines. So, why are...