Aircraft Definition and 354 Threads

I am looking for a book that teaches how to design an RC aircraft, given performance specifications: $$v_{stall}, v_{max}, m_{payload}, h_{max}$$ That is, given the stall speed, max. speed, payload and service ceiling, I'd like to know how to design the aircraft's air-frame (wing span...

if any object is in aircraft so it will have velocity same as that of aircraft ,right ? and say in case it is thrown out of aircraft in between will it retain that velocity provided that no external force act on it?

I was thinking about the working principle of propeller aircraft (piston engined) during some dark night hours with nothing to do... Mostly because of flight simulator video games hahaha... Basically for the piston engined propeller aircraft (P-51 Mustang) to move forward, the propeller must be...

I've heard they were much more efficient then li-ion batteries and anything else really.. and drones today are all about flight time, wouldn't hydrogen fuel cells result in a great flight time advantage? why are they not in use?

Hi, can you help me understand this? "the tapered wing having a 6-ft. chord at the root, the leading and trailing edges being tangent to a circle of 2-ft. radius at the tip, and the fuselage being 3 ft. wide." What should the diagram looked like? 2 circles, 1 with 2 ft radius, and 3 ft in...

Homework Statement When Cl = 0.9, find the difference in induced drag for a rectangular wing of 36-ft. span and 6-ft. chord and a tapered wing of the same area, the tapered wing having a 6-ft. chord at the root, the leading and trailing edges being tangent to a circle of 2-ft. radius at the...

I found this model among a few that a family member used to have, but I can't seem to find out exactly what it is. It looks like some type of ramjet UAV from the late 60's or 70's. Any ideas?

I find it hard to believe that the only factor important in computing aircraft lift is Bernoulli's principle. Doesn't good old Newton's Second Law play an effect? In other words simply deflecting the airflow downwards. Does anyone know the relative importance of these factors? (EG for a...

Hey Guys, Me and my friends are planning to work on a project to solve some real time problem associated with passenger aircrafts.i would like you guys to suggest some problems faced by the industry so that we can solve them.Since i'am an mechanical engineer it would be better if the problem...

Homework Statement What cruise velocity should the aircraft fly to maximize the cruise range? Aircraft mass (excluding fuel), m0= 14000kg Mass of fuel, mf = 2500kg Specific fuel consumption of aircraft engine, sfc = 2.8\times10-5 kg/N/s Drag polar, CD = 0.02+0.08CL^2 Planform area of...

Homework Statement See attachment Homework Equations Maybe lift force = ClρAv2 A=area Cl= lift coefficient= 0.3 ρ= air density V=air speed but don't know which one it represents... Under or below wing or average? And the bernoulli equation seems to be needed as well... The Attempt at a...

Model aircraft display a wide range of aerofoil shapes, and many of these models fly despite the shape of the cross section of the wing. Models with flat wings, cambered wings, thick wings, thin wings - all of these fly succesfully. What is the function of aerofoil shape on free flight...

how much heat roughly does commercial aircraft APU produce? I'm interested in an average and maximum range. Any experts?

Hi, I want a software that can generate aerodynamic coefficients (CD, CL, CY,Cl,Cm,Cn, etc) I am aware of some specialized software (e.g. AVL, open source from MIT, LinAir Pro, commercial, etc). But was wondering whether I can use 'common' software like AutoCAD Mechanical or Solidworks...

Hi! I'm breaking my head about the following problem: Consider an A/C at a certain velocity flying at a certain altitude. The A/C measures it's speed via the difference in total- and static-pressure and applying bernoulli. Now the aircraft accelerates. What happens? At this point I get...

Hello, I'm doing a full stress analysis on a complete aircraft engine. so i was looking for documents with full specifications of the engine ( blueprints,charts,data tables, ...etc. ) . I know that most of these information are top secret whether it's a civil engine a military engine. However...

Hi, since I don't have money, I didn't include BS Air Transportation in my choices. My friend and I are really confused. We are now already in college and currently taking aerospace engineering. However, it is so hard but I think we can make it (we haven't failed so far) but the problem is the...

Homework Statement You’re a pilot beginning a 1500-km flight. Your plane’s speed is 1000 km/h, and air traffic control says you’ll have to head 15° west of south to maintain a southward course. If the flight takes 100 min, what’s the wind velocity?The Attempt at a Solution veffective south =...

Hello to all , I need your help again , if you can . My question is about a problem / exercise book solved Aircraft Structures for Engineering Students - 5ed , example 20.4 . So the problem this section supports a vertical load of 10kN and the objective is to calculate the flow section...

Hi there, I am currently a student at Heriot-Watt University and have been given a project of deriving a nonlinear equation of motion for an a380 wing engine. The engine is to be considered as a lumped mass attached to the cantilever beam and the main fuselage is considered having translational...

Hello, I'm new to this forum so please bear with me! I am a Math and Mechanical Engineering Double major who is considering getting my PhD in Math. I want to become a Math professor after I receive my PhD, and I have always had a love of airplanes, so I was wondering if there are any topics I...

The little wicks placed at the wingtips to get rid of static electricity on the wings and body of the aircraft are vital to aircraft. I am interested in what the certification requirements for placing these ont he wings. I assue the formula of would include things like 1-surface area 2-speed...

Hi, I'm a third year student studying mechanical engineering under going a third year dissertation. My individual project consists of designing a light aircraft, however I have ran into a few issues. I want to import a turboprop engines for my 4 person light aircraft. Following that I am...

how is the smartest, can do the analysis? Ok when the Airplane touch the runway. the rear wheels touch first, in part of second, the rear tires skidding and then start to spin up. I need to analysis the forces to find: friction torque, skidding, slip ratio,... you can use any data or just...

Question: An aircraft of total mass 1.5 x 10^5kg accelerates at maximum thrust, from rest along a runway for 25s reaching the required take off speed of 65 ms^-1. Assume that the acceleration of the aircraft is constant. Calculate the distance traveled in this time. My attempt: I...

Can somebody post a table of the average lift energy/thrust energy ratios or percentages of various types of aircraft?

hi all just got back from a trip to New Zealand. Whilst at Christchurch City Airport, I was pleased to snap a few pics of the NASA SOFIA ( Stratospheric Observatory for Infrared Astronomy ) aircraft that is down in this part of the world to do southern hemisphere astronomy...

Hello, so today i was thinking about alternative ways to provide electricity to a motor in a fixed wing aircraft. Ideas: 1. Use thermoelectrics. They would generate the most voltage around the engine, so maybe they would only be placed here, or all over the aircraft. Advantage: unlike solar...

EADS had a pseudo model of an electric passenger aircraft at the Paris airshow. Apparently they like a hybrid approach: six electric motor driven ducted fans, a battery, and a single traditional jet turbine that assists on take off and generates electric power for the fans/battery. I'm curious...

Hello all, this is my first post. I was wondering if any of you could point me in the direction of a source with details on propeller aircraft able to produce a T / W Ratio greater than one. Thank You!

I am working on a project and more precisely about aeronautics in 2040, can you please provide me with your feedback on this survey: 0. Age : [20-30] / [30-40] / [40-50] / [50-60] / [ 60 ...] 1. Do you fear taking a plane? Yes/ No 2. How often do you take an airplane per year ( 2 way...

HI Everyone. First of all, I'm not an aeronautical or mechanical engineer. I'm an electronics engineer but I'm currently doing a group project where I'm required to carry out a stability analysis on an aircraft that we've designed using the simulator software, X Plane. I apologise in...

Hi all i am a student doing my thesis on the aircraft performance. However, i am in a need of actual flight data to validate my work. The parameters i am looking at are the range, fuel usage, velocity and altitude. Does anyone know where can i access to those data of any flights or any types...

Homework Statement See figure attached. Homework Equations The Attempt at a Solution I'm having trouble getting start with this one, but here's what I've got so far. I assumed R is the signal received by the TDS. P(R=X) = \mu \quad , \quad P(R=N) = 1 - \mu Now in part...

How do u calculate the volume of an aircraft wing? Would it work if I calculate the area of tip and root chord then times it by the span? Thanks

Homework Statement Hey, I'm struggling beyond belief with this assignment, one of the attached pdf's is the question and the variables given. What I'm struggling with most is what order I'm meant to do things in, I think I've got the start of it sussed but beyond that I'm clueless I've got...

hi all, Im currently a aerospace engineering and I have some questions that I have been wondered about the range equation. I just studied about the breguet range equation (R=v/sfc L/D ln(wi/wf)). The equation is pretty simple within many assumptions such as constant speed constant L/D...

1. Hello there, I am a first year undergraduate mechanical engineering student, looking for help on a question. "Figure Q2 shoes a schematic diagram for an aircraft catapult system. The aircraft is represented by the mass A (Ma), and μ is the coefficient of friction between the aircraft and...

Hey guys, I'm no physicist so thought I'd ask the experts! A friend asked a question which got me thinking... Question was: why do heavier aircraft take longer to slow down than lighter aircraft? It may help if you have knowledge of the principles of flight but I was struggling to come up...

l have heard of auto pilot option in flying aircraft. do we have similarly the concept of takeover by the machine with/without the consent of pilot in case pilot cannot answer to safely land the air craft.

hello all, i need some help on this one. i want to do an article about the posible aplications of quantum entanglement in aircraft flight control systems. i want to entangle two transistors, put one of them at the ACE - actuator control electronics (probably) in the pilot's cabin and the other...

Hey there everyone, long time lurker but first time poster, with a question. I've been studying for an upcoming exam and I came across this question in my textbook and I'm absolutely stumped. Any advice would be much appreciated. An aircraft has a weight of 90,500 N, an aspect ratio of 5.5, a...

I have to do optimization of a landing gear of an aircraft but can not find anywhere sketches of the landing gear. Can anyone tell me where I can find these drawings? I must be detailed drawings to build the landing gear in Catia.

I'm trying to understand thrust for a real world application. I found this formula: T= pi / 4 x D(squared) x (v+V1/2) x p x V1 Where: T thrust [N] D propeller diameter [m] v velocity of incoming flow [m/s] V1 additional velocity, acceleration by propeller [m/s] P density of...

Hello guys I'm studying electronics engineering in Bahrain and graduating by the end of the year. I am thinking of taking Aerospace engineering or Aircraft Maintenance Engineering for my Masters degree. ( Is it possible? ) I want your opinion on both subjects and which is better to go...

Hello everyone. I have been trying to think of some practical and cheap airship designs. I have done some calculating, and if you were to have an airship's envelope in a cylindrical shape that is 300' long and 75' in diameter, it would be able to lift approximately around 45 tons if filled with...

I am trying to design an on-board horsepower display for an experimental aircraft. The parameters that determine engine power are RPM, manifold pressure, altitude, temperature and mixture. Each of these parameters is currently monitored and displayed individually in the airplane and the...

Hello, my first post here. I'm an avid flight sim enthusiast. I wanted to ask what is the formula for calculation of sink rate for aircrafts? I know 4 forces act on the airframe: lift drag gravity thrust sink rate is the amount of distance/time the aircraft sinks from final...

This is a simple question hopefully. The equation for determining lift produced by an aircraft is the following if I am correct: L = (1/2) d v2 s CL If I was designing an aircraft that would maintain flight at standard air pressure at 1000 feet .002308 ISA at 130 MPH with a wing area of...

First off, I'm not an engineer. I'm only in high school so this may sound like a stupid question to some. But, I watched this episode of mythbusters where they tested the gas mileage on a standard car, and one with golf ball-like dimples all over it, and there was a significant difference...