#1
|
||||
|
||||
Pulse jet boosters (links)
Hello All,
I came across several videos of modern tests of V-1 Argus pulse jet engines (and a JB-2 Loon pulse jet engine; the Loon was a U.S. copy of the V-1 “doodle-bug” or “buzz-bomb”)—the noise and fire are incredible! I also found videos of pulse jet-powered RC and Control Line model airplanes; links to videos of these models (and of the current-day V-1 and Loon pulse jet tests, plus historic flight footage) are included below. (The He 162 “Volksjäger” [“People’s Fighter”] is a common pulse jet-powered scale model subject.) Also: Watching the pulse jet model videos (they typically use elastic or bungee catapults and inclined launch rails in order to shorten the takeoff distance, rather like the actual V-1 “buzz-bombs”), it occurred to me that model rocket motors—in parachute- or streamer-equipped booster body tubes, if desired--could be used to get the models airborne in even shorter distances, even “zero-length.” The model pulse jet engines’ higher-frequency buzzing, surprisingly, sounds like aircraft *piston* engines. In addition: Such model rocket motor-powered boosters could also be made--to scale--to boost ducted fan- (or turbojet-, or even pulse jet-powered) RC (or even Free Flight, if timer-equipped electric ducted fans were used) scale models of early cruise missiles, such as the MGM-1 Matador ( http://en.wikipedia.org/wiki/MGM-1_Matador ), MGM-13 Mace ( http://en.wikipedia.org/wiki/MGM-13_Mace ), SM-62 Snark ( http://en.wikipedia.org/wiki/SM-62_Snark ), SSM-N-8 Regulus I ( http://en.wikipedia.org/wiki/SSM-N-8_Regulus ), and SSM-N-9 Regulus II ( http://en.wikipedia.org/wiki/SSM-N-9_Regulus_II ), as well as models of current jet drones, including the BQM-34 Firebee ( http://en.wikipedia.org/wiki/Ryan_Firebee ), the MQM-107 Streaker ( http://en.wikipedia.org/wiki/Beechc...QM-107_Streaker ), and the BQM-167 Skeeter ( http://www.designation-systems.net/dusrm/m-167.html ), among other jet drones of this type. (Videos of these full-scale cruise missiles and jet target drones--and others, of course--are also on YouTube www.youtube.com.) Here are the video links: Modern V-1 Argus pulse jet engine static test—incredible noise and vibration! www.youtube.com/watch?v=Rdwbp6R2qM8 Outdoor Argus pulse jet static firing at a museum. www.youtube.com/watch?v=Hh3PexhT4Ss JB-2 Loon (U.S. V-1 copy) pulse jet engine static firing test at a museum www.youtube.com/watch?v=WCsKs2NhdWg Nearly 1:1 scale V-1 flying replica. www.youtube.com/watch?v=95yaa98NO9k Nearly full-scale RC V-1 flying model (with onboard camera view, too). www.youtube.com/watch?v=zy03UVxfxqg Vintage (World War II) V-1 films. http://www.youtube.com/results?sear...buzz+bomb+sound Weston RC pulse jet demonstration last year. www.youtube.com/watch?v=zwXLDjYqVgc RC model pulse jet airplane. www.youtube.com/watch?v=uwlqH6ugGMM Model pulsejet planes at Weston Park. www.youtube.com/watch?v=r50DRou0LsM Several He 162 pulse jet-powered (and some ducted fan- and turbojet-powered He 162) videos, portraying multiple scale models of this type. http://www.youtube.com/results?sear...e+162+pulse+jet Pulse jet powered He 162 scale model. www.youtube.com/watch?v=-7dH2B0cyuE Dutch pulse jet model (with onboard camera views, too). www.youtube.com/watch?v=_h6D47Lkfcw Control line pulse jet model plane (with slow-motion sequence). www.youtube.com/watch?v=_TlCtzjx28w Here (see: www.youtube.com/watch?v=zwXLDjYqVgc ) is another—from just last year, and with still shots, too—video of one of the delta-winged pulsejet RC models, and: Here (see: www.youtube.com/watch?v=y298zg9JgRM ) is a double-delta, tailless pulse jet RC model, and *here* ( www.youtube.com/watch?v=PXI2AEzlqyI , www.youtube.com/watch?v=f4RwhJpqHCU , www.youtube.com/watch?v=t93KmnNtWv8 , www.youtube.com/watch?v=WrOsLhUA6-I , www.youtube.com/watch?v=nY7P48BKfAs , www.youtube.com/watch?v=bXmph7rLER0 , www.youtube.com/watch?v=CxYuffN0qCY , and www.youtube.com/watch?v=al0WeND149Y ) are videos of various tailless pulse jet RC models. I hope these videos will be interesting.
__________________
Black Shire--Draft horse in human form, model rocketeer, occasional mystic, and writer, see: http://www.lulu.com/content/paperba...an-form/8075185 http://www.lulu.com/product/cd/what...of-2%29/6122050 http://www.lulu.com/product/cd/what...of-2%29/6126511 All of my book proceeds go to the Northcote Heavy Horse Centre www.northcotehorses.com. NAR #54895 SR |
#2
|
||||
|
||||
Those have been around for a long time. I remember them in R/C magazines in the 70's and 80's.
__________________________________________________ ____________________________ |
#3
|
||||
|
||||
Quote:
At Orange Blossom Hobbies in Miami (now long gone), I recall once seeing, on display there many years ago (it wasn’t for sale, but was part of a collection of historic old model airplane engines), a model airplane pulse jet engine that was only about half the size of Hobby King’s Redhead/Dyna-Jet pulse jet (the tiny pulse jet was on display next to a “standard size” Redhead pulse jet engine [Curtis Dyna-Products, which made the Dyna-Jet pulse jet, is still in business, now called Curtis Dyna-Fog: http://www.dynafog.com/about-us-2/ ). Also: If a pulse jet engine was mounted inside a properly-contoured bypass duct (like the simple “bypass turbojet,” which is also mounted inside such a duct [it's not to be confused with a low-bypass turbofan, which is sometimes also called a bypass turbojet, especially if the bypass ratio is very low]), it would produce greater static thrust, and it should also be quieter (since the larger-volume mixed bypass air/pulse jet exhaust flow would exit the bypass duct's nozzle more slowly, as in a turbofan engine as compared with a turbojet). It would also tend to muffle the rapid "boom-boom-boom" combustion pulses.
__________________
Black Shire--Draft horse in human form, model rocketeer, occasional mystic, and writer, see: http://www.lulu.com/content/paperba...an-form/8075185 http://www.lulu.com/product/cd/what...of-2%29/6122050 http://www.lulu.com/product/cd/what...of-2%29/6126511 All of my book proceeds go to the Northcote Heavy Horse Centre www.northcotehorses.com. NAR #54895 SR |
Thread Tools | Search this Thread |
Display Modes | |
|
|