Airplane Definition and 350 Threads

Homework Statement The wings have a total surface area of 250 m^2. The air above the wing is 300 m/s and the air below the wing is 250 m/s. The ambient air pressure is around 0.5 atm. The airplane is descending at 20 m/s, therefore there is an upward drag on the wings. What is the mass of...

This question may be impossible to answer without specific knowledge of vintage aircraft engines but maybe not. How does this airplane... come out of the wave running? It seems like running a piston engine underwater would result in ingestion of water and hydro-lock. I'm not an...

Hi, Can someone please help me understand these two situations? 1. When an airplane is flying from point A to point B, is Earth stationary from the point of view of the plane? While I am not sure, I think the answer to this question is yes, because a plane flies within the atmosphere of...

Dropping items from an airplane. This is real world, so think air density, terminal velocity, and nonlinear acceleration? etc… Check out the DropSim on NASA GRC. This is exactly what I’m trying to calculate. I have a firm grasp on D drag, Cd coefficient of drag, r air density, V...

Homework Statement I tried many times to do these two problems but I can't seem to start somewhere... An airplane is flying horizontally at a speed of 50 m/s, and at an elevation of 160m drops a package. In order to hit a certain spot on the ground, how many seconds before passing the...

Hello, I was reading somewhere about how to control Rudders in RC planes. The basic equation here is the drag equation: F=0.5*ρ*v^2*C*A (take ρ=1Kg/m3) where v is the velocity, C is the Drag coefficient of the control surface (Rudder in this case) and A is the area. I am wondering if we have...

this looks like a very easy problem but I was ? about the bomb not dropping really in a vertical direction but implies that when it hits the ground it will right over the plane? this was under exercises for differentiation but don't why it would be used for this no ans in bk on this one..

Hello, I'm having a bit of a problem with the following problem: A supersonic airplane flying at the velocity v is flying horizontally to the ground with altitude h. At the exact moment when the plane is vertically above a listener on the ground, it emits a sound. It takes Δt seconds for the...

OK, want to see if I am using the use of rad properly here the answer seems very small. but 35 degrees isn't much for all the rotations. Answer not in book so hope these are correct.. thanks ahead.

Homework Statement On her flight home at Thanksgiving, Margaret decides to apply the physics she has learned in PHYC1300 to measure the speed of the aircraft when it takes off. She dangles her watch from a string while the aircraft accelerates down the runway. Draw a free body diagram of the...

Homework Statement An airplane has a velocity 325km/h relative to the air. It is going in a direction [S30W]. There is a wind velocity of 80km/h[W]. What is the velocity of the plane relative to the ground? Homework Equations aVg + pVa = pVg (velocity of air relative to ground +...

I've been trolling for this answer on the Internet but can't find a simple explanation. If I have two airplanes of different mass, both flying at the same speed, which plane has the larger turning radius and why? It seems like the more massive plane would require the larger turning radius due...

Homework Statement A small aircraft cruises at a speed of 80 m/s in still air. The plane is scheduld to fly to a destination that is 600 km due west on a day on which the wind is blowing at 18 m/s from south to north. It travels in a direction of 13 degrees SW. Find the time required for the...

Homework Statement I have an example problem I would like to solve and unsure how to graphically set up the problem. I would like to derive the answer by the component method of deriving vectors instead of law of sines/cosines. An airplane is trying to keep on a due west course towards an...

Everybody seen the crashed 777 picture right? Just weird, because I always thought the fuel would be stored beneath the airframe and inside the wing. How did the fuel get "up there"?

I wonder how airplanes fly? I know maybe it's a tough question. Does the airplane fans produce huge force that makes the airplane boosts it's speed?The wings make it fly, and I don't know how it's tail works. But how do the airplanes fly according to it's heavy weight? Plus there is a big air...

1. A 55 kg airplane pilot pulls out of a dive by following, at constant speed, the arc of a circle whose radius is 320 m. At the bottom of the circle, where her speed is 230 km/h, what is the magnitude of her acceleration? Homework Equations v^2= vi^2 +2a(x-xi) The Attempt at a...

Homework Statement Homework Equations B=F/|q0|vsinθ V=IR The Attempt at a Solution V=500m/h = 8.05m/h = 223m/s L=35m B=0.50gauss 0.50g=F/|q0|*223m/s*sin90

Hi, I've seen the forces in a turn depicted two different ways: http://selair.selkirk.ca/Training/Aerodynamics/images/lf-turn.gif http://www.free-online-private-pilot-ground-school.com/images/forces_during_turn.gif Which one is correct? I think the first one would be since it's...

Say I have an airplane that is performing a loop at a constant speed. Why is it that at the top of the loop the normal force points inward and not upward due to the lift of the plane? That way, at the top of the loop, when the pilot is upside down, he feels lighter due to the lift of the...

Homework Statement We were given a video...I'm not sure if you can post video links otherwise I would...but it's a video of an airplane on a string flying in a circular motion. On the top of the string you can see that the tension of the string is 6.5N. and it is flying at an angle of 50°...

Homework Statement Why are the windows on a commercial jet so small? Homework Equations The Attempt at a Solution I said because the smaller the window the less force that will be applied on it due to pressure differences. But since F=AP and the pressure stays the same the...

Homework Statement A particular type of toy airplane available in stores have little motors attached to them. Consider hanging one on a string from the ceiling and starting its motor. As it moves around in a circle with constant speed the stringwill make an angle with the vertical as shown in...

Homework Statement An airplane flies at 600km/h on a bearing of W38N while a wind of 75km/h from W25S is present. Find the planes resultant velocity and direction The Attempt at a Solution So here's what I did: The Airplane: x = 600cos142 = -472.8 y = 600sin142 = 369.39...

Homework Statement The aeroplane is traveling at a speed of 75 m/s and the radius of the turning circle is 80 m. Homework Equations Calculate the angle which the airplane wings make the with horizontal during the turn. The Attempt at a Solution I tried but I couldn't get to the...

Homework Statement The modern Boeing 747 passenger jet airplane cruises at a speed up to 920 km/hr, at an altitude of 11,500 m. The cabin pressure is maintained equivalent to the atmospheric pressure at an altitude of 2,000 m. This is called the "cabin altitude". I couldn't find information...

Homework Statement A pilot is flying his personal jet at 180m/s, approaching the airport. Near the airport the pilot sees the runway 300m horizontally to his left, but he is moving parralel to it. He banks left quickly, turning in level, circular arc, until the plane has moved 150 m, then...

Homework Statement an airplane, whose air speed is 580km/h, is supposed to fly in a straight path 38N of E. But a steady 72km/h wind is blowing from the north. In what direction should the plane head? i know the answer is 43.6 N of E but i am not completely sure how to get it Homework...

trucks travels beneath an airplane... Homework Statement A truck travels beneath an airplane that is moving 180 km/h at an angle of 39 to the ground. How fast must the truck travel to stay be- neath the airplane? What is the magnitude of the vertical component of the velocity of the...

Send telemetry from an RC airplane from 2 miles up here is what I am trying to do. I got a Nerdkit to learn the basics of electronics(I'm not an engineer, just starting) and I need a project to develop and since I'm passionate about airplanes and remote data sending(?) I want to tackle this...

Hello awesome science people. I am a an aerospace engineering student and I am currently engaged in completing an assignment regarding a fictional re-design of the wing on a DeHavilland Twin Otter. I do have some difficulty though, since suddenly I have to independently manage to think about...

Homework Statement A plane is traveling at 350km/h northeast through a wind that is blowing 134km/h south. a) What is its true velocity and heading? b) What is its velocity directly east? I'm really not sure how to set this up. I need some nice pointers or someone to solve it and explain...

Homework Statement An airplane descends in a circular pattern with a constant radius of 250 meters. The airplane has a horizontal speed of 75 m/s (constant) and a downward speed of 5 m/s, which is increasing at a rate of 2 m/s2 Determine the acceleration of the airplane. Homework...

Homework Statement A package is dropped at time t = 0 from a helicopter that is ascending steadily at a speed vi. What is the speed of the package in terms of V_{i}, g, and t? Homework Equations V (t) = V_{o} + -9.8 t The Attempt at a Solution I thought it was the same as the...

Homework Statement A 2598kg airplane is diving (at constant velocity) making an angle of 10 degrees to the horizontal. Find the lift force on the plane assuming that it is normal to the velocity? I think my main problem is the fact that I'm having a bit trouble with understanding the...

Homework Statement The Attempt at a Solution I tried to use vector addition. I got the correct groundspeed (65.9). However I could not get the angle. The answer key says the angle is 87.7 degrees but I can't see how I can get that with my diagram. I think I must be interpreting something...

Homework Statement An air-traffic controller observes two aircraft on his radar screen. The first is at altitude 900 m, horizontal distance 19.0 km, and 25.0° south of west. The second aircraft is at altitude 1200 m, horizontal distance 17.6 km, and 17.0° south of west. What is the distance...

It is thought that people develop respiratory infections during air travel because much of the airplane cabin air is recirculated. Airiines claim that using only fresh air in the cabins is too costly since at an altitude of 30 000 feet the outside conditions are -50°C and 0.1 bar, so that the...

https://www.youtube.com/watch?v=ZiestvrumYM Is this possible without assistance? I don't see how he could even get that plane moving. I think maybe he could KEEP it moving, but what do you guys think?

This is a question from an old test that I took this semester. My grader did not input anything, so I am left to trying to figure out by myself if my answers are correct or not. Question: The motion of an airplane leaving from miami can be described using a cartesian coordinate system with...

3 years ago when I lived in Jordan I met a Palestinian who believed that he had unified gravity with quantum mechanics. I knew enough about physics to know that that was a very hard thing to do but I didn't have the knowledge of course to tell if he was right. He certainly knew a lot about...

Homework Statement The problem I must complete is problem 14.18 14.17 A small airplane of mass 1500 kg and a helicopter of mass 3000 kg flying at an altitude of 1200 m are observed to collide directly above a tower located at O in a wooded area. Four minutes earlier the helicopter had been...

Homework Statement Working on a project for a vibrations course, task is to quantitatively analyse a system in which mechanical vibrations occur. I chose to model aircraft landing gear, for a variety of different airplanes, namely one large transport (747), a simple tricycle gear GA plane...

Hey guys, first of all I want to say hey to all! I have been a long time lurker and follower of these forums and have been known to find a lot of your answers helping me out throughout my college life. I also know that you just don't like to spit out the answers for those who don't put in...

I came to know that Fixed wing as well as propeller lift equations are same [Am I right]? Anyways I have question. What's total lift for fixed wing plane with Wing length of 4 m, 1 m width, Angle of attack = 16 degree, and Wind/plane speed of 6 m/s? Secondly, what's total lift for...

Thought experiment (hopefully we don't need to crash a plane to figure this out); Let's say we lift a commercial airliner up to 40,000 feet with a large balloon and then drop the airplane. It will hit the ground sometime later somewhere short of the speed of sound (600 mph or so, depending...

Homework Statement A plane must reach a velocity of 2.4 km/h to lift off. If it has 45s of runway time, what must its acceleration be? vf= 2.4km/h or 0.666666666666 m/s vi=0.0 m/s Δt=45s a= ? Homework Equations vf= vi+ aΔt The Attempt at a Solutionvf- vi ------- = a Δt...

Here 'tis: Enjoy! :wink:

Homework Statement An airliner of mass 300 tonnes is powered by four engines, each developing 15 000 kW. Its speed at take-off is 75 m(s^1), and it takes 11 minutes to reach its cruising speed of 210 m(s^1) at a height of 10 000 metres. Calculate the work done against air resistance during...

Homework Statement Assuming equal rates of acceleration in both cases how much further would you travel if braking from 56mi/h to rest than from 28mi/h ? a, 5.2 times farther b, 4.8 times farther c, 3.2 times farther d, 4.0 times farther Homework Equations not really sure what i...