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Topic: Pulsejet

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	The X-Jet Engine
		Experienced pulsejet engine builders will notice that this engine is running with what appears to be a very short tailpipe -- it has a length/diameter ratio of just over 6:1, far shorter than that required by traditional engines.
		This higher frequency means that the amplitude of vibrations generated by the combustion pulses is markedly lower than normally encountered in a pulsejet.
		The X-Jet uses a number of advanced techniques such the use of an integrated intake diffuser and tuneable internal geometry have been exploited to significantly increase both the amount of air/fuel burnt per cycle, and the compression ratio achieved prior to ignition.
	www.aardvark.co.nz /pjet/xjet.shtml (804 words)

	AboveTopSecret.com Archive: "The PulseJet Exotic Propulsion Design"
		Pulsejets use the forward speed of the engine and the inlet shape to compress the incoming air, then shutters at the inlet close while fuel is ignited in the combustion chamber and the pressure of the expanding gasses force the jet forward.
		This results in the buzzing drone for which the experimental pulsejet missile is named the "BuzzBomb".
		People have pointed out that pulsejets can be cooled which would solve the heating problem of the ramjets.
	www.abovetopsecret.com /pages/pulsejet.html (246 words)

	UK Rocketman - Tech
		Pulsejets are little more than a tube which acts as a combustion chamber, with a valve at the front of the tube.
		Pulsejets have been around since the 1940's, and were used as the propulsion system of the German Fiesler Fi-103, better known as the V-1 Flying Bomb.
		I can't take credit for this pulsejet, it's the pulsejet of Sally, a fellow crazy in MARS, the rocketry group that I am rather heavily involved in.
	www.ukrocketman.com /digital/pulsejets.shtml (881 words)

	Rocket Research Homepage (Site not responding. Last check: 2007-10-26)
		The pulsejet is a powerful air breathing jet engine that is composed of a simple reed valve and a properly shaped pipe.
		The pulsejet functions by combusting an air/fuel mix at intervals that are regulated by the opening and closing of the reed valves.
		To tune the pulse jet the resonant frequencies of the reed valve and the pulsejet tube must be matched as close as possible.
	www.rocketresearch.org /pulsejet.html (509 words)

	Valveless Pulsejet
		Pulsejets depending on reed valves were also short-lived and unreliable.
		It was the grandfather of all valveless pulsejets.
		pulsejet, which has no moving parts, the exhaust gas does not need to be cooled.
	www.beck-technologies.com /valvelesspulsejet2.html (12943 words)

	Pulse jet engine - Wikinfo
		The advantage of the valveless pulsejet is simple and obvious, there are no moving parts to wear out so they are far more reliable and a lot simpler to build.
		Where the pulsejet differs from other engines such as the Turbojet or Ramjet is that the combustion inside the engine is not continuous but occurs in the form of repeated deflagrations, hence the name "pulsejet".
		However, despite this advantage, pulsejets are seldom considered to be practical power plant due to their high fuel consumption, low efficiency, noise, and significant vibration levels.
	www.wikinfo.org /wiki.php?title=Pulse_jet_engine (3073 words)

	Halfbakery: PulseJet Turbine
		A long exhaust pipe is needed so that at the end of the combustion the moving mass of air sucks in fresh mixture.
		Pulsejets are typically re-ignited by re-sucking-in hot exhaust gasses.
		If you build a valveless pulsejet which exhausts onto a turbine, you might be able to get this to work, but it certainly won't be efficient.
	www.halfbakery.com /idea/PulseJet_20Turbine (839 words)

	Homebuilt Jet Engines
		These pulsejets are easily built from materials that can be obtained for $200, or even less, making them among the most affordable sources of power available.
		The pulsejet achieves its performance edge by use of an intake valve that is sonically resonant with the engine's tailpipe.
		Thus, the key to a pulsejet's efficiency lies in the construction of the valve and its sonic attunement.
	www.windspire.com /jetpower (444 words)

	Scrapheap Challenge 2003 – Jet Racer – Science
		pulsejets are often referred to as 'tuned pipes'.
		While experts like Bruce understand so much about the theory behind pulsejets, there is still much in their design that relies on experience and trial and error.
		The pulsejet is a very simple engine – it has no moving parts.
	www.channel4.com /science/microsites/S/scrapheap/challenges/jet_racer/science.html (1207 words)

	Performance Enhancement of Unsteady Ejectors Investigated Using a Pulsejet Driver
		Pulsejets are mechanically simple and inexpensive to build and operate, particularly when compared with the target ejector application, PDEs.
		Pulsejets resemble PDE’s, having both high enthalpy exit flow, and very large fluctuations in exit velocity.
		The pulsejet and ejector system taken during operation are shown in the following photograph.
	www.lerc.nasa.gov /WWW/RT2002/5000/5530paxson.html (555 words)

	pulsejet
		The problem we face is that the ignition system on our pulsejet engine is no good to sustain ignition of the pulsejet engine.
		The V-1 was powered by a 109-014 pulsejet impulse duct, the V-1.
		The valueless detonation pulsejet engine was designed to meet both of this 21st Century propulsion requirements.
	www.share4.esd105.wednet.edu /reifelpb/pulsejet.htm (703 words)

	www.ponnet.com - home
		We figured out that since our pulsejet was not running smoothly, we had to redesign our venturi pump and our valve system.
		This was partly due to the fact that we used stainless steel instead of spring steel, and partly due to the fact that our valve retainer had become too small for this set of valves.
		Below are some pictures of the assembly, the running pulsejet, and the forensic investigation of the valve retainer.
	www.ponnet.com /projects/pulsejet (1262 words)

	Axis History Factbook: The V-1 Flying Bomb
		Propulsion for the new flying bomb was provided by the "pulsejet", which had been invented by Paul Schmidt in the early 1930s, with development picked up by the Army Weapons Office in 1937.
		The pulsejet was little more than a "stovepipe", with its sole moving part consisting of a shutter assembly inside the air intake.
		As the Argus pulsejet engine couldn't produce effective thrust until the flying bomb was up to flight speed, the V-1 was launched off a 48 meter (157 foot) long ramp using a steam catapult system, designed by the Walter company.
	www.axishistory.com /index.php?id=1362 (4535 words)

	modeling of a pulsejet in flight
		The pulsejet has an inlet facing to the flight direction.
		Air enters the pulsejet through the inlet and react with fuel in the combustion chamber.
		I am not sure what kind of boundary conditions should be specified at the pulsejet inlet and the outlet.
	www.cfd-online.com /Forum/cfx_archive_2005.cgi/read/11798 (112 words)

	PULSEJET
		The following statistics estimate the number of searches per day across the major English-language search engines as identified by various trade publications.
		"PULSEJET" is suggested in spellcheckers for the following: puis-je.
		Source: compiled by the editor, based on several corpora (additional references).
	www.websters-online-dictionary.org /definition/english/pu/pulsejet.html (247 words)

	PULSEJET
		These advanced pulsejets have no moving parts, use less than one pound of fuel per pound of thrust per hour, have low exhaust temperatures, and are completely incapable of particle intake damage (the intake rejects solid matter).
		Pulsejets and Ramjets have two things in common: incredible simplicity with no moving parts, and incredibly complex fluid-dynamics.
		The inlet solution to combining these technologies is using a re-entrant oriface, shaped like the inner curvature of a donut, with a reflector cone, so the explosive waves are focused in a single direction.
	blastwavejet.com /pulsejet.htm (1564 words)

	NASA GRC Optical Technology & NDE Branch - Species Measurement
		DPIV was used in the Glenn Research Center’s Rocket lab to characterize the high temperature, high speed flow field properties of a pulsejet coupled with an ejector of rectangular cross-section.
		Using a dynamic pressure transducer located in the pulsejet combustion chamber, the DPIV system was used to conditionally sample the flow field leaving the pulsejet and entering the ejector.
		The pulsejet driven ejector flow was sampled over a range of phase steps to completely map the operational cycle of the pulsejet.
	www.grc.nasa.gov /WWW/OptInstr/Wernet_Web/pulsejet.html (241 words)

	jetZILLA Magazine / Ezine Cover Page
		Eric's spreadsheet formulae are based not on strict theory, but rather on his own observations of the design of successfully tested valved pulsejets that have been developed over the years in a wide variety of sizes and three distinct valve designs.
		Pulsejets can be used to power a variety of different types of vehicles ranging from planes to go-karts.
		Pulsejet calculator 1.4 not only incorporates the improved dimension calculator page, but also can give the flat sheet metal projection for all the parts of the tailpipe.
	www.jetzilla.com /jetZilla.html (5860 words)

	Amazon.com: pulsejet (Site not responding. Last check: 2007-10-26)
		Observations on the design and operation of pulsejet engines as derived from an experimental and theoretical investigation (SAE Technical Paper Series) by J. S Richardson (Unknown Binding - 1984)
		Analytical and experimental study of the pulsejet ejector by William Johnson (Unknown Binding - 1967)
		of the ramjet is the pulsejet, shown in Fig.
	www.amazon.com /s?ie=UTF8&keywords=pulsejet&index=blended&page=1 (831 words)

	PULSEJET
		These advanced pulsejets have no moving parts, use less than one pound of fuel per pound of thrust per hour, have low exhaust temperatures, and are completely incapable of particle intake damage (the intake rejects solid matter).
		Pulsejets and Ramjets have two things in common: incredible simplicity with no moving parts, and incredibly complex fluid-dynamics.
		Shown Here: A pulsejet, modeled after the original Marconnet invention, is immersed in water, lifted out, and fired up all within 5 seconds.
	www.blastwavejet.com /pulsejet.htm (1564 words)

	guestbook
		Bruno Ogorelec's document on his new pulsejet concept (Blast Compression Valveless pulsejet engine, which is just as simple to make as the conventional pulsejets, but should prove much more powerful and reliable for the same size.
		This is a document describe the theoretical of the pulsejet.
		Pulsejet Engine Calculator 1.4 is a free Excel based program created by Eric Beck to help people design their own pulsejet engines.
	www.pulse-jets.com /pulse3.htm (184 words)

	Pulsejet pagina Berry van Scherpenzeel
		Op 7 juni 2006 had ik mijn 2e wat grotere Lockwood/Hiller pulsejet motor klaar en aan de loop.
		Op 5 September 2006 was mijn eerste AFWE pulsejet klaar en aan de loop.
		Een paar langere filmpjes van de pulsejets op YouTube.com.
	home.planet.nl /~scher868/suz/pulsejet.htm (257 words)

	PulseJet Dust Collectors / Pulse Jet Bag Collector
		Tri-Mer pulse jet dust collectors have no internal moving parts, and maintenance is minimal.
		The pulsejet timer is field-adjustable for pulse duration and interval, and can be equipped to
		Pulsejets from Tri-Mer are low noise and low vibration.
	www.tri-mer.com /pulsejet-dust-collectors.html (167 words)

	Examining The Lockwood Valveless Pulsejet
		I learned early on that pulsejet exhausts and dusty roads or dry grass don't mix too well so mounting the jet very high keeps things safe.
		One of the nice things about traditional pulsejets is that the intake and exhaust face in opposite directions.
		Perhaps this is a good time to remind all those who are experimenting with, or who plan to experiment with these engines that you really do have to be careful.
	aardvark.co.nz /pjet/mylockwood.shtml (1463 words)

	Valveless Pulsjet
		A valveless pulsejet is one of the simplest jet engine in the world.
		This jet was invented at the sixties, but the development stopped when the turbojet arrived.
		From the patent, it's easy to construct a valveless pulsejet engine in every size.
	www.home.no /andreas.sunnhordvik/English/mechanical/valveless_e.htm (770 words)

	Rocket Science Books: Russian Pulsejet Engines and Pulsejet-Powered Model Airplanes
		Following World War II, as small pulsejets were emerging in the United States (Dyna-Jet, MiniJet), Japan (Tiger Jet), and elsewhere, the Russians were designing and building very advanced engines as well.
		There are innovative static test stands and setups, electrical circuits for starters, tanks, fuel feed systems, fuel injection designs (and various locations for fuel injection), valves and valve holders of many varieties, several unique head and venturi designs, chamber pressure testing apparatus, tailpipe and combustion chamber shapes, etc etc.
		Pulsejet valves are the key to successful operation, and the Russians came up with dozens of unusual concepts--all shown in detailed drawings--including (besides the usual "daisy" flapper valves, like in the DynaJet) triangular and trapezoidal flappers, multi-flappers, multi-spring flappers, and several unusual valve seats.
	rocketsciencebooks.home.att.net /russian.html (732 words)

	Pulsejet Speed Record Attempt
		In mid 2003 I was in the UK where I had the pleasure to meet and discuss jet-powered vehicles with the man behind the current land-speed record, Richard Noble.
		Richard's Thrust SSC vehicle set a new land-speed record of 763.035 mph (Mach 1.02) in 1997 and he was fascinated by the simplicity and power of the valveless pulsejet design when it was demonstrated at the Santapod drag strip in the UK.
		My own speed record attempt is significantly more modest than that of the Thrust SSC team but it will be remarkable never the less insomuch as, to the best of my knowledge, there has never been a pulsejet-powered record-challenging vehicle built anywhere in the world before.
	www.interestingprojects.com /jetspeed (407 words)

	Tenkay Pulsejet Product from Camfil Farr Inc. for Subsea Oil Gas Application
		Tenkay Pulsejet product, manufacturers by Camfil Farr Inc. is Tenkay pulsejet filter elements are vertically hung in lockable metal tracks which provide for their automatic alignement..
		Tenkay Pulsejet by Camfil Farr Inc., Tenkay pulsejet filter elements are vertically hung in lockable metal tracks which provide for their automatic alignement.
		Tenkay Pulsejet information given here at the subsea oil and gas directory may contain errors, be incorrect, incomplete or not fully updated.
	www.subsea.org /products/specification.asp?prod=755 (225 words)

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