Now a boomerang is a bit like a gyroscope: it is spinning around and This precession is a good thing for the boomerang: if you throw it in the. Construction of traditional Australian boomerang (for right hand). Instructions how to make traditional boomerang. 1. Take plywood sheet of 12mm thickness. Boomerang is a rotor the blades spinning linear speed of wich is low, if compared it to the translation speed of the whole boomerang. It means that the slow spin.

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By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policy aerodynamis, and our Terms of Service. I posted a question before on this website asking how to build a boomerang for a project which can fly at least feet, so how would I increase the flight path.

Aerodynamics of Boomerang. Chapter 3

A user responded with: Second, we need a large moment of inertia so the boomerang maintains rotation during flight – CuriousOne’s bomerang of a tungsten tipped blade is certainly interesting consider a 3 legged boomerang to give a more favorable construction.

Finally – throw it hard. After researching some of the concepts he was talking about I still don’t really understand how it will make the flight path longer.

Thank you very much for your time. Please also state why you are a reliable source for my bibliography. I don’t know if you are familiar with a gyroscope: If you tilt it, then it doesn’t fall over – instead its axis slowly spins around in a motion called “precession”.

You can see a nice demonstration of this in this bboomerang video. Now a boomerang is a arrodynamics like a gyroscope: Because it’s shaped like a wing in cross section it creates some “lift” for itself which would normally keep it flying.

This is actually a problem that helicopters experience all the time, and in fact in helicopters they change the angle of the rotor between the forward and the backward part of the motion to counteract this fun fact that I am guessing you did not know – see for example. Now since the boomerang does not have the ability to change the hoomerang of attack, it does experience a torque – and just as in the gyroscope, this torque causes precession.

This precession is a good thing for the boomerang: Now the key to “flying far” is to slow down the rate of turning so arodynamics flies a long way makes a big circle. To do so, we need for there to be relatively little torque compared aerodynamlcs the angular momentum of the boomerang, because that’s what gives rise to precession. The torque is a result of the difference in wind speed experienced by the forward booomerang “wing” compared to the backward moving “wing” of the boomerang.

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The difference divided by the mean relative difference in lift then becomes:. This is why you want fast rotation of the boomerang relative to the aerodynamkcs motion – it slows down the precession and therefore the rate at which the boomerang “turns around and comes back”.

You can achieve this by making the boomerang larger – the tip moves faster, and as an added bonus you increase the moment of inertia. The only other thing we need is that the boomerang must not lose its rotation too quickly, so it needs a large moment of inertia; and though we want it spinning quickly, we don’t want it to get too much lift just enough not to fall to the earth – that boomeranb we need a low angle of attack so it gets the right amount of lift for the rotation speed.

As for “credible reference”: Take a look at how booemrang site works, and how it has developed its own version of “peer review”. Then decide if you can cite me as a “credible source”.

You may find the article at http: They use the same simplified model of motion for the boomerang that I used although I had not found that page when I wrote the above. You can easily make a miniature boomerang by cutting a piece of thin cardboard in the approximate shape of a boomerang – if you take an old playing card and cut it like this, it is just about right:.

Finally, lay the card on the back of your left hand and give it a flick with your right index. When you point it up a little bit, it will fly off and return to you. A genuine indoor boomerang. Both goals can be achieved with a spear thrower kind of extension http: The total mass of the boomerang also has to be matched to your particular physique.

If it’s either too light or too heavy for you, then you won’t be able to transfer an optimum amount of energy into the device. That’s exactly the opposite of what happens in sports, where the regulations force athletes to have a certain body build to be efficient. By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies.

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Boomerang – Wikipedia

Floris k 11 Let me try this another way knowing that you are 16 helps in tailoring the reply! You can see a nice demonstration of this in this youtube video Now a boomerang is a bit like a gyroscope: This is actually a problem that helicopters experience all the time, and in fact in helicopters they change the angle of the rotor between the forward and the backward part of the motion to counteract this fun fact that I am guessing you did not know – see for example which can be found zerodynamics http: The difference divided by the mean relative difference in lift then becomes: You can easily make a miniature boomerang by cutting a piece of thin cardboard in the approximate shape of a boomerang – if you take an old playing card and cut it like this, it is just about right: Bend the edges of the boometang like so just a few degrees, to give it some lift: It’s pretty obvious at least to some of us that you usually know what you are talking about.

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No need to get into advertising for yourself. CuriousOne – I was specifically and uncharacteristically, I admit responding to the request “please state why you are a reliable source for my bibliography”. In the broad light of day I agree it is out of place.

Boomerang as Vector Rotation Example

I derived the equation from the diagram I included in my latest edit. I changed it slightly so there is no aerodynsmics any more but the basic story is unchanged. Throwing harder means you need to achieve two things: Distance is a function of kinetic energy no matter how hard he optimizes the aerodynamics. He needs to start with a simple problem boomrrang to throw a stone the farthest before he can even dream about building a tungsten tipped boomerang.

Just my two cents. You think he can handle that actual equations of motion of an aerodynamic object? As for the boomerang not changing aerodybamics And why are you putting words into my mouth now? I a the guy who said something about tungsten tips for larger moments of inertia. Let’s end this here, before it gets ugly. Have a good one. Agree to drop it. Do look at hyperphysics. I was more thinking about the gap between the simple explanation and the actual calculation.

I am more of a glass is half empty guy I think we can both agree that it’s a fun thing to think about ways to make boomerangs “better”, though. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies.

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