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Topic: Water rocket

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	Water rocket book (Site not responding. Last check: 2007-10-06)
		Water rockets provide an authentic purpose for the learning of many physical and mathematical concepts, providing students, teachers and others with an interesting means of investigating the effects of the many variables able to be altered.
		One problem with a water rocket is that the water (usually the major component of mass) lies towards the rear of the rocket, so the empty front of the rocket tends to be dragged around to the side (like throwing a dart backwards) as the rocket moves through the air.
		To test a water rocket's stability (when empty), a swing-test may be performed, a string is attached to a point on the circumference closest to the CG (CG is in fact located in thin air inside the bottle), and the rocket swung around in circles (larger circles are better).
	bradcalv.customer.netspace.net.au /wrbook.htm (8084 words)

	Water Rockets
		Flying model rockets is a relatively safe and inexpensive way for students to learn the basics of forces and the response of a vehicle to external forces.
		The flight of a water rocket is similar to the flight of a compressed air rocket with one important exception.
		The mass of the bottle rocket varies during the flight because of the exhausting water plume.
	exploration.grc.nasa.gov /education/rocket/rktbot.html (426 words)

	Flight of a Water Rocket
		Water rockets are among the simplest type of rocket that a student encounters.
		The rocket is then mounted on a launch tube which is quite similar to that used by a compressed air rocket.
		Air is pumped into the bottle rocket to pressurize the bottle and thrust is generated when the water is expelled from the rocket through the nozzle at the bottom.
	exploration.grc.nasa.gov /education/rocket/rktbflght.html (579 words)

	Water rocket - Wikipedia, the free encyclopedia
		Water rockets are like their model rocket cousins, except that these are powered by a combination of water and air pressure instead of a chemical propellant.
		Multi-bottle rockets and multi-stage rockets are considered to be "proper" water rockets.
		The Oscar Swigelhoffer Trophy is an Aquajet (Water Rocket) competition held at the Annual International Rocket Week in Largs, Scotland and organised by STAAR Research through John Bonsor.
	en.wikipedia.org /wiki/Water_rocket (2561 words)

	Water Rocket
		You also have to close your eyes as you launch to avoid the initial jet of water from the rocket and so you miss the best part of the flight which is where the rocket accelerates to full speed.
		Rockets have been reported to fly as high as 90 metres so if it is windy they may land a large distance from the launch pad.
		To improve the stability of the rocket you must either increase the length of the cylindrical fin or move the fin further back (by increasing the length of the struts).
	users.bigpond.net.au /mechtoys/waterrocket.html (2685 words)

	Water Rocket World
		Water rocketry is the perfect complement for any festive occasion.
		Water Rocket World brings the excitement of rocketry to you.
		Safety First -- We test all rockets ahead of time and handle all the fueling (water) and pressurizing (compressed air) while the launch commander (you) is in mission control over 20 feet away.
	www.waterrocketworld.com /index.html (162 words)

	Real Water Rockets 5 - Science Olympiad - The Challenge
		If your rocket design is intended to travel up the path of success through various competitions, you may encounter such a launcher in which case, you should mount the fins on the side of the 2 litre bottle - details later on.
		Attaching them to the side of the rocket and using a swept back parallelogram shape, such that the edge stuck to the rocket is on the straight sides but the distal edge (the edge furthest away from the rocket) goes back as far as the launcher will take (ie, level with the flange).
		Overfill the rocket slightly and mount it on the lanucher.
	ourworld.compuserve.com /homepages/pagrosse/h2oRocketR5.htm (1531 words)

	Software for Fun and Education
		For the typical free flight rocket, the degree of stability inherent in its design is largely dependent on the relative position of the rocket's Center of Mass (CM) to its Center of Pressure (CP).
		This usually requires that more of the rocket's mass is concentrated at the front end of the rocket, while the fins are positioned as far aft as possible to maximize their effectiveness as a stabilizing device.
		A few of the primary factors that influence the degree of stability needed are, the severity of the wind gusts and turbulence in the air, the speed your rocket flies, and the shape and distribution of mass in the rocket nose, body, and fins.
	www.seeds2lrn.com /rocketSoftware.html (1680 words)

	Bottle Rockets (Site not responding. Last check: 2007-10-06)
		To me, the bottle rocket is the best physical science teaching tool there is. I have to thank the folks involved with Science Olympiad for introducing me to the activity.
		A bottle rocket is a 2-liter (soda) bottle with compressed air and water released in an upward direction.
		Timing of the rocket starts when the rocket leaves the launch pad, and stops when the first part of the rocket hits the ground, when the rocket disappears from the judges' sight, or when the rocket impacts or gets entangled in an object (e.g.
	members.aol.com /hayhurst1/h2orocket.htm (1657 words)

	Water Rockets
		A standard 2-liter pop bottle 1/3 full of water, pumped to 80 psi and then released, will eject all its water in less than one-tenth of a second, and at that point ("burnout") will be only about 2 meters off the ground.
		For a rocket to fly in a stable fashion, the center of gravity (CG) must be forward of the center of pressure (CP).
		Air streaming past the rocket holds the flap down as long as the rocket is moving fairly fast.
	dogrocket.home.mindspring.com /WaterRockets (2536 words)

	Water Rocket Page (Site not responding. Last check: 2007-10-06)
		I thought that if I made a long skinny rocket this would move the center of gravity back behind the center of area because the fins are heavier than the rest of the rocket.
		So when we used less water the rocket accelerated faster, so the center of gravity moved foward of the center of pressure and as a result the rocket came down nose first.
		As the rocket lifts off the launch tube the flang on the T nozzle catches on the neck of the soda bottle.
	coolwaterrockets.com /id6.html (1593 words)

	Unbelievable Water Rockets
		Rocket Car is the ideal water rocket for use in confined spaces.
		The water rocket's greatest enemy is air friction, and the Extreme fights back by slipping through the air almost unnoticed, virtually caressing the atmosphere with its velvety-thin profile.
		Water rocket experimenters are never satisfied with the altitude their rockets attain.
	www.antigravityresearch.com (1510 words)

	International Water Rocket Challenge
		The rocket MAY NOT DEPLOY a parachute, parafoil, wings, or any other means or extensions from the body of the rocket that slow its descent.
		The "winner" is the rocket that has the longest flight duration in whole seconds (round up for.5 seconds or more, round down for less than.5 seconds) from launch to touchdown.
		After fixing my leaking launcher and a lawn-darting rocket that was only able to provide a flight time of 12 seconds, I managed to get a few launches at 125 psi or so and a flight time of 14 seconds (high-flying and side-gliding was my MO).
	www.orgsites.com /va/bristolwaterrockets/_pgg1.php3 (1198 words)

	Cool Water Rockets (Site not responding. Last check: 2007-10-06)
		I think I build water rockets because it is fun and also because I enjoy doing something with my dad.
		This experience building water rockets with my dad is a time in my life that I will always remember.
		The egg prize was a prize awarded to anybody who could launch a water rocket to an altitude of 30ft.
	coolwaterrockets.com (596 words)

	NPL Water Rocket Challenge 2003
		His launch bay was not too far from a row of trees, behind which his high going rocket, hanging at a big and very light parachute, soon disappeared due to side wind.
		This is the rocket I have made shortly before the event.
		Note the 2 water jets: one coming out of the launcher (upwards), and the main one from the rocket, which is going quickly steeper and steeper due to the heavy water load.
	waterrocket.uh-lab.de /lr030625_npl.htm (805 words)

	Water Rockets
		I found that a high pressure bike pump works great for water rockets, mine has a pressure guage built in that goes to 140 psi and we routinely max it out, heh heh heh.
		There was an onshore breeze this day and we had to walk quite a ways out towards the water to avoid having rockets come down in the trees.
		It took gallons of water to reach the 40% optimal fill point, and was wildly impressive at launch.
	www.outsideconnection.com /rockets/default.htm (934 words)

	makezine.com: Soda Bottle Rocket
		Smart Water is just a bottled water brand, but the bottles are multi-layer laminated, thick and strong so seem to hold pressure which single-layer PET water bottles won't (they stretch and will probably burst).
		I got into water rockets because his version of the same toy one I had as a kid broke (the pumps have plastic shafts now), so I thought rather than buy him another junky one, I'd build one.
		With this design, a ping pong ball on the tip of a 16-24 inch pole is extended from the nose of the rocket, and functions to theoretically form an air cavity around the majority of the rocket's body, reducing drag.
	www.makezine.com /05/rocket (2929 words)

	WRN.com - Water Rocket News
		U.S. Water Rockets X-12 reaches 1,909 feet (582 Meters) in two averaged flights and sets new World Record.
		Team U.S. Water Rockets, recently featured on The Discovery Channel's Mythbusters, has announced that their newly repaired X-12 Water Rocket has officially recorded a new World Record for Water Rocket Altitude.
		For every water rocket camera that flies and takes photos, there is another in the scrap-heap.
	www.uswaterrockets.com (291 words)

	Water Rocket Science Project Report (Site not responding. Last check: 2007-10-06)
		We will not go near the bottle rocket when it is under pressure.
		Launch the rocket and start the stopwatch at the same time.
		longest flight times were when there was 1/2 liter of water in the rocket.
	home.san.rr.com /leinbach/rocket.html (1949 words)

	Bigfoot Water Rocket Launcher Systems
		Even though we market the greatest commercial water rocket launcher system available, we cheerfully share all the fun we're having.
		You'll be amazed at the level of amusement in the Water Rocket Playground.
		3 Chamber Rocket with 3 Nozzle Diameters
	www.h2orocket.com (390 words)

	Nuclear salt-water rocket - Wikipedia, the free encyclopedia
		A nuclear salt-water rocket is a type of nuclear thermal rocket designed by Robert Zubrin that would be fueled by water bearing dissolved salts of plutonium or U
		These would be stored in tanks that would prevent a critical mass from forming by some combination of geometry or neutron absorption.
		The rocket would be powered by a nuclear-thermal reaction when the water was injected into a reaction chamber.
	en.wikipedia.org /wiki/Nuclear_salt-water_rocket (228 words)

	Water Rocket Construction
		Water Rocket Fun - Free software simulation for a Mac or PC Space and its Exploration Rockets - NASA sites that has index of rockets, how rockets work, and making your own rockets
		Welcome to the Beginner's Guide to Model Rockets – The NASA site is a Beginner's Guide to Model Rockets will show you the basic math and physics which governs the design and flight of model rockets.
		The Rockets Away educational program teaches about the science of rocketry through the use of hands-on experiments, computer software and the building and launching of 2-liter bottle rockets.
	www.hannibal.cnyric.org /TeacherWebs/Rjones/rockets/Links.htm (257 words)

	Water Rocket Links - Clifford Heath (Site not responding. Last check: 2007-10-06)
		These sites contain original and definitive or comprehensive ideas for beginners or advanced water rocketeers.
		A single photo of a water rocket and launcher in the red Australian soil.
		Rocket Weight-lifting proposal, no water rockets any more.
	polyplex.org /cjh/rockets/links.html (489 words)

	NPL: Water Rocket Challenge 2006 (Site not responding. Last check: 2007-10-06)
		64 teams of school-children, youth groups, and adult rocketeers competed in two sessions to see who could get their rocket into the target zones on the NPL sports field.
		If you wish to learn more about how water rockets work, how to build them, and how to optimise their flight, Dr. Michael de Podesta has written a booklet detailing the process from start to finish, with a look at the physics involved in water-powered flight.
		Water Rocket Simulator as used in the guide (Windows Installer, 1.5 Mb)
	www.npl.co.uk /waterrockets (310 words)

	Water Rocket Launcher
		Once upon a time one of the projects was for a water rocket launcher.
		I was wandering aimlessly through the hardware store trying to discover what it was I needed for a different project when I came across some rubber stoppers.
		I bought 3 rubber stoppers and with a buck or two spent I was committed.
	www.water-rocket-launcher.com (166 words)

	[No title] (Site not responding. Last check: 2007-10-06)
		For example, "Water Burn Out" is the point at which all the water was just blown out of the bottle.
		This program uses the rocket information in the "Inputs" section above to determine the best possible mass and water to use with your rocket.
		It does this by running the "Flight Simulator" above many times until the best possible (optimal) combination of water and mass is determined.
	www.lbusd.k12.ca.us /poly/teachers/luttrell/docs/rocket/index.htm (206 words)

	Water Rocket Science Kit
		This Wild Goose Water Rocket Jumbo-size Science Kit lets you build your own rocket and launcher, then launch it over and over again!
		Experiment with different fuels or even different rockets.
		Water Rocket Science Kit, water rocket science, water rocket set, water pressure demonstration, bottle rocket, water rocket science kit, wild goose science
	www.discoverthis.com /watrocscienk.html (86 words)

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