Aerodynamics Definition and 251 Threads

As I have looked through the internet and did my research I have found some information on how to calculate the drag coefficient, however none of what I have search for matches what I need. Currently I am doing a physics assignment for grade 12 and I am investigating the physics behind...

The question is which is better from the efficiency point of view: One big propeller or multiple smaller ones? Or are they the same? My general impression is that a bigger one will have much more better efficiency as if you consider the following points: 1. lift is proportional to the area of...

Hello everyone. Firstly, I have to say that I'm studying mechanical engineering but I was at Preperation Class last year. I'm going to begin my engineering education this year. (hence, I don't have any high level math or physics informations) I am interested with Aircrafts. I've just read...

Hi guys and girls! Here's a hard one I need help wit. I really want it resolved because I sincerely love it. There's an aerodynamic phenomenon called 'the Vulcan howl'. Example: It occurs when engines are employed at maximum power or more (maximum power in aircraft is only a recommended...

Long story short. Want to know waaaay before I get deep into Aerospace Engineering, what I need to know to do it and if I can, I've already retrieved books on it. Like Fundamentals Of Aerodynamics... Some Calc 2 books.. Calc 1.. etc etc. However I look at Calc 1/2, then look at my Aerodynamics...

Hi, I saw a video of a guy who made a hover and figured; hey, I should try making one too. I've a general design in my mind. His design had two propellers, one on the front and one on the rear. I wanted to make a bike with more than 2 propellers( assuming more the propellers, greater the...

We will be racing a 55g model F1 car on the 28th of April in the F1 in Schools national finals however at the regional finals we came across a problem. The car traveled 24 meters in 1.1 seconds but broke on impact with the towel used to stop the car at the end of the race. We need to find a...

Athena Racing is an F1 in Schools team from Dublin, Ireland. F1 in Schools is a competition in which students must manufacture and race a to scale F1 car, give verbal presentations, raise funds and talk with judges. We hope to represent Ireland at the world finals in Texas.

Hello, I was doing my physics coursework, and blew a hairdryer at my makeshift aerofoil across distances of about 10cm and wind velocities of 8-11 m/s, then measured the lift off of a balance. I found they were proportional, exactly (!?), after doing some research I found drag is proportional...

Could someone explain the image we see below of a fully separated and stagnated flow over a wing if we were to focus on where the flows rejoin on the trailing edge we see above a fully stagnated flow DP=0 The static pressure here in the boundary layer above where the flows rejoin should be...

Hi! I have attached a small sheet of wood to a stand and then all of it to a scale. After that with a air supply I've made wind go through the "wing". Due to lift, the scale showed up a negative value. Knowing that value, is it possible to calculate the lift of the wing? Thank you

I want to drop a rocket-shaped object from a near-space balloon, with the aim of maintaining a downward acceleration that leaves it's contents in microgravity. I think that this means: The (unpowered) rocket needs to maintain as close to 9.8m/s2 acceleration in order to balance out the...

I'm nearly at the end of my preliminary testing for a wind tunnel in my A2 physics coursework. My question for my project so far is: "Do different shaped objects exhibit different properties under the influence of high speed air". For my coursework I need to measure or observe something to get a...

Using an ablative carbon-carbon heat-shield, what thickness would be used up? Or might a ceramic insulator be able to handle it? What would happen if the nose was solid aluminium?How can this be calculated? What information do I need to figure this out?

I'm pretty new to this forum but have loved sciences if all kinds since I was young and plan to get into nuclear engineering after high school. Back on topic, I have made a rocket launcher out of pvc pipe that is powered by an air compressor. Ranging from 60-120 psi propelling my paper rocket...

Hello everyone. I'm currently doing a research on aircraft performance for my school project, which require me to design an airfoil to suit a specific mission. I'm not very familiar with the formulas used for calculating the aircraft performance and I would like to seek help from the forum...

After a Compression (Oblique) Shockwave during supersonic flight, the air speed (Mach number) is always reduced. I was wondering if an aerodynamic shape could be created to increase the speed of the affected stream to a Mach number greater than the freestream Mach number. I am looking for an...

Good afternoon, I am just curious about what books you guys use, I am a aspiring physicist with other degrees. I have always had a passion for space and engineering and when I go looking for Aeronautical or Aerospace books I find out that none of them are really math rigorous. Could anyone...

Hey guys!, this is my final year aeronautical engineering project that me and my group are going to work on! we have this concept of producing a roll in an uav/RC aircraft by reducing the area of the wing on one side while keeping the other side area constant or increasing it(gradually) and...

Now a days i am working on this paper...

Me and a friend at school are doing an honors project for a Computer Science class. We're trying to find the aerodynamic drag coefficient of complicated 3D Shapes entirely virtual. We started out the project with a specific physics engine in mind. It turned out this engine "Bullet Physics"...

Me and my grandfather got into a "debate" (more like one-sided argument) on whether objects fall at the same rate on Earth independent of air resistance or not. He claims that "If you drop 2 objects from an airplane -- like a car and a marble, both objects would hit the ground at the same...

I have a physics essay coming up with the subject of the effect of aerodynamics on projectiles in sports. Does anyone have a good question for it? Thanks!

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 know the title... (sigh not again) and this may be the case but i was hoping one you you clever guys on here could help me to the most apporpriate answer is not. thanks basically we know from skydiving and motorsports if the center of aerodynamic pressure is not equal to the center of...

Hi to all the members, I have to consider the front wing car of a single-seater car and then optemize it. I want to consider a simple front wing not like those of F1 because they are too complicate to analyze. I want to consider a simple one (biplane) with not strong variation of curvature. Can...

I want to start studying aerodynamics. To get me started, what are the basic terms that I need to know?

I am a skydiving coach and I am trying to figure out how many pounds of force wind moving approximately 120 mph has on something with a surface area of 25 square inches. I know turbulence and compression play into it as we'll but I just want a general formula to figure it out. The object is...

Homework Statement Hello, Let's say I was given a problem where I have to calculate CD I find everything except CD Now, CD = CD0 + K CL2 I know how to calculate K but I don't know what CD0 is. Would that be a given? or do I have to find it myself? If so, how? Then there's another formula for...

Hi, I am working on investigating an idea I proposed regarding a ramjet that operates in subsonic flow (of a fixed speed) with a convergent intake. That utilizes the pressure immediately behind a standing shock-wave for compression. I have posted a link to my initial report here and I now need...

Okay, so I am a team member of a college robotics team, and this year we have quite challenging theme of playing badminton with robots, so for this reason we decided to track the position of shuttlecock in air. Now our approach was to predict the final position where it will land on ground from...

First of all I'd like to apologise for my question, as it will probably be embarrassingly easy to answer but I don't have any idea. I've recently been given the role of running a manufacturing centre for F1 in Schools and everything is going well apart from one area. We have a wind tunnel to...

I have a few questions related to downforce in cars. Please forgive any fundamental misunderstanding of aerodynamics. Does the shape of a car, say a Volkswagen Golf, driving on a road produce lift or downforce? Is the Coanda Effect at play there? How does the height of the car above the ground...

What is the approx speed in motorcycles at which chassis aerodynamics start to play a role in power output. I need a value at which say a harley body and a yzf body assuming same weight and engine will start to show considerably different characteristics. Thank you

Hi all, If anything here is incorrect or confusing or seems trivially simple, I apologize: I'm not a physicist and created an account specifically to get help on this from some people who are! My question is this: Assume a plane has a constant airspeed and you wish to fly a circular pattern...

Hello, I've always been interested in space and space flights and have often wondered how rockets are lunched into space, how their trajectories are defined, how they are sped up (like gravity assist), how they are slowed down (like the complicated trajectory of the Rosetta mission etc . . . I...

At a distance of 15 meters, is a pellet more accurate than a BB, or vice versa? Is a pellet more aerodynamic than a BB, and, if so, why?

Hello! I'm trying to model a car slowing down from speed with the forces of drag and friction and gravity from the road slope.. The model, which models the resistive forces is as follows.. [ Ffriction + Fdrag + Fslope ] / m = -a (deceleration) where: Friction force Ffriction = A...

Homework Statement For monoplane of Clark Y wing, 36-feet by 6-feet, with 3.8 sq ft. equivalent flat plate area, what should be the airspeed for minimum Horsepower when fuel has been burned so that the total weight is 1800 lb? Homework Equations Wing Area = 36 x 6 = 216 Weight = Lift Weight =...

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...

Hi Physics Community, I'm working on the design of an aileron less and tail engine small UAV (Wing span 800mm) but I got stuck in Stability and Control. I recall from a teacher that a V-tail design is good for those configurations. However, I cannot find references to calculate/estimate neither...

Hey everyone, I have a theoretical problem. I have a box. Rounded off but not greatly aerodynamic. It is 800 kg including propulsion. I have wings with a max of 2.25m long and a max width of about 2m wide. This is the length of the box. I need to know how fast the box needs to go with those...

Hello guys! I'm currently in the IB Diploma Programme. I'm trying to narrow down my topic in Aerodynamics of an F1 car (huge fan here!). Any ideas? I was thinking more on the lines of wing deflection..

Hey Everyone, so I have just started Aerodynamics and having completed a number of exercises I'm being asked to design an airfoil. I'm a bit outta my dept as I've transferred into this course from a diff field. 1. Homework Statement To design an airfoil, using the knowledge you've acquired in...

Friends, I want to know the methods involving the airfoil design and optimization. from initial step onwards...how to start my works.

For a glider to sustain flight at a constant speed, the aircraft must be placed in a dive so that the forward motion is maintained by the component of gravity acting along the glide slope ( as a ball rolling downhill ). This force must equal to the drag on the aircraft. The less drag, the lower...

Hello Everybody, I am planning to move into Aerospace designing as aerodynamics is one of my desires to work in. Currently I am working as Design Engineer(more of CAD Designer with CAD tool- CATIA, Solid Works) for last 2 years. My current working domain is Automotive. Please guide me on...

I have just watched a MythBusters episode investigating whether a concrete glider could fly. They conclude that it was plausible on the basis of a model concrete glider 'flying' 34 feet while dropping 9 feet, giving a glide ratio of nearly 4:1. Now if I recall correctly, the launch speed of the...

Hello! This is probably a rather simple problem, but I've been a bit confused about how to approach it. Any kick in the right direction for problem b) would be much appreciated! (Below is the full problem statement and sub-questions also for those who want to practice their physics. The...