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#1
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http://www.luftarchiv.de/motoren/argus.htm
Please note that "Argus As 014 Staustrahltriebwerke" translates into "Argus As 014 RAMJET" And NO, a gas turbine is NOT closer to a RAMJET than a Pulsejet because neither the Ramjet or its primitive form, the pulsejet have a compressor or turbine. My original comments on the pulsejet has always been that the Germans were the ones that called it an intermittent ramjet, or athodyd. The V-1 was launched off a ramp or an aircraft at 250 mph for the pulsejet to work independently. On the ground the firing of the engine (according to numerous sources) lasted just 7 seconds by remote control with compressed air and fuel pumped into the stovepipe to get it up to operating temperature. It was the 16-17g launch up to 250mph that got the As 014 operating independently. Sources: "German Weapons of World War II": "the launch gear was important, since the pulse jet engine needed to be at flying speed before it would work"- pg 114 "Germany's Secret Weapons in World War II": "The device must be accellerated by some external means to a critical threshold velocity, something of the order of 300km/h (186 mph) before it will work..." pgs 62-63 " the launch procedure was straightforward. The pulse jet was fired up and allowed to run for 7 seconds, bringing it up to the correct operating temperature" pg 66 rest of launch sequence as in my earlier post pgs 66-67 "The Last Year of the Luftwaffe May 1944 to May 1945": "The missile accelerated rapidly and when it left the end of the 156 ft ramp it was moving at 250 mph, comfortably above minimum flying speed" pgs 81-82 "German Secret Weapons of the Second World War" by Ian Hogg: "just off to the left side of the ramp was the 'distributor unit' mounted on a steel platform. This carried more compressed air tanks, pressure guages, and distrubution valves supplying compressed air to the missile, firstly to blow air into the front of the duct and simulate flight, and secondly to switch on the fuel valve (and switch it off again should there be any malfunction). There was also a transformer and trembler coil which supplied power to the engine spark plug by flexible lead" pg 20 Get the picture now? The V-1 pulsejet wasn't running on its own on the ramp. I have lots more references should you require them. Rob ![]() |
#2
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![]() Uzytkownik "robert arndt" napisal w wiadomosci om... http://www.luftarchiv.de/motoren/argus.htm Please note that "Argus As 014 Staustrahltriebwerke" translates into "Argus As 014 RAMJET" And NO, a gas turbine is NOT closer to a RAMJET than a Pulsejet because neither the Ramjet or its primitive form, the pulsejet have a compressor or turbine. My original comments on the pulsejet has always been that the Germans were the ones that called it an intermittent ramjet, or athodyd. [snip..] Rob, you CANNOT tell about principles of how something works coming from clasification only. Please analyze following example: gliders, aircraft and helicopters (and many others too) belong to the same group of vehicles called AERODYNES. Do they work the same way? Can you tell 'glider is a simplified aircraft'? Maybe. Can you tell 'helicopter is something like glider, but more complicated'? SURELY NOT! Ramjets and pulsejets (and turbojets, and turboprops and turbofans...) belong to the group 'Strahltriebwerke'. Do they work the same way? NOT! Common is only that some airstream ('Strahl') is coming into, gain some energy (combustion) and goes out doing some useful work (direct thrust or shp). All but one are working in the same thermodynamic combustion cycle: constant pressure combustion. You guess WHICH one is different? YES, the pulsejets are working in the constant volume combustion cycle. 'Staustrahltriebwerk' means only that incomin air is compressed in aerodynamical way - withot use of any mechanically driven compressors. AFAIK scramjets belong to the same 'Staustrahltriebwerke' branch of the general 'Strahltriebwerke' group. Do you see much common features between pulsejets and scramjets? Rob ![]() Regards JasiekS Warsaw, Poland |
#3
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![]() "robert arndt" wrote in message om... http://www.luftarchiv.de/motoren/argus.htm Get the picture now? The V-1 pulsejet wasn't running on its own on the ramp. I have lots more references should you require them. Trouble is the video of the launch clearly shows it was http://www.aardvark.co.nz/pjet/images/v101.mpg http://www.aardvark.co.nz/pjet/images/v102.mpg Keith |
#4
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"Keith Willshaw" wrote in message ...
"robert arndt" wrote in message om... http://www.luftarchiv.de/motoren/argus.htm Get the picture now? The V-1 pulsejet wasn't running on its own on the ramp. I have lots more references should you require them. Trouble is the video of the launch clearly shows it was http://www.aardvark.co.nz/pjet/images/v101.mpg http://www.aardvark.co.nz/pjet/images/v102.mpg Keith Trouble is (if YOU watched video 1 closely) the pulsejet is running off the distributor unit which is barely seen off to the left of the ramp and the spark plug flexible lead connection is spotted too. Since it took at least 186 mph for the As 014 to run independently there is NO WAY it is running on its own on the ramp. The distributor unit is operating it by remote control forcing compressed air and 75 octane fuel into the stovepipe, Ignition is remote controlled too. Time warming up on the ramp- 7 seconds. Rob |
#5
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![]() "robert arndt" wrote in message om... "Keith Willshaw" wrote in message ... "robert arndt" wrote in message om... http://www.luftarchiv.de/motoren/argus.htm Get the picture now? The V-1 pulsejet wasn't running on its own on the ramp. I have lots more references should you require them. Trouble is the video of the launch clearly shows it was http://www.aardvark.co.nz/pjet/images/v101.mpg http://www.aardvark.co.nz/pjet/images/v102.mpg Keith Trouble is (if YOU watched video 1 closely) the pulsejet is running off the distributor unit which is barely seen off to the left of the ramp and the spark plug flexible lead connection is spotted too. But there is no air being forced into the intake and no fuel connection. Nobody denies an external air source and spark were needed to start the thing but once it was running it clearly COULD keep going with no ram air, hell you can even see the valves cycling as it works Since it took at least 186 mph for the As 014 to run independently there is NO WAY it is running on its own on the ramp. The distributor unit is operating it by remote control forcing compressed air and 75 octane fuel into the stovepipe, HOW ? There is nothing connected to force air into the intake, the only connection is the spark plug lead Here we have 2 videos both showing the same thing, an engine running without ram air BEFORE take off. Ignition is remote controlled too. Time warming up on the ramp- 7 seconds. I dont doubt they ran it on the ramp before launch, but its clear that the engines in both clips were running WITHOUT an external air source at launch. It could hardly work otherwise since as you say it needed that spark lead for starting and it clearly wasnt 200 yards long. Keith |
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