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Topic: Propellor


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In the News (Mon 27 May 19)

  
  Propellor Boundary Conditions   (Site not responding. Last check: 2007-10-08)
Internally, the propellor disk is used to mark regions of cells, as shown in Figure
Eventually, in a time-accurate simulation, it should be possible to even vary the propellor state value around the disk simulating the presence or absence of a propellor blade on the propellor wash itself.
Ultimately, the propellor states should be coupled to the flow with an impellor disk model, as in [79], [80], and [81].
hpcc.engin.umich.edu /CFD/users/charlton/Thesis/html/node54.html   (205 words)

  
 Propellor-driven Aircraft   (Site not responding. Last check: 2007-10-08)
Two simulations are used here to show examples of propellors in the flow, one of a traditional private light aircraft, and the second an example of a new generation of propellor-driven aircraft.
The propellor disk was modeled with 3,784 cells (after four adaptation cycles, since the propellor is a forced condition, the adaptation criteria focused naturally on its vicinity).
While the propellor model is useful for modeling both propellors and could be used for modeling helicopter rotors, the concept of embedding boundary conditions within the flow is perhaps the most important point.
hpcc.engin.umich.edu /CFD/users/charlton/Thesis/html/node65.html   (518 words)

  
 axi 2212/26 propellor   (Site not responding. Last check: 2007-10-08)
If the > engine is out of line a bearing could be worn, case pitch propellor, there are > a coupling that could be adjusted wrong, maby the propellor sharft is bended or > a blade is dameaged.
A propellor, a helicopter's rotors and a fixed wing are all one and the same thing in that they are shaped to induce low pressure on one side and high pressure on the other due to the airofoil section of their design.
They work, but it is a common misunderstanding, that the rotating cylinder need drive a propellor ------ this is not the force that work with a rotating cylinder sail.
www.audio-net.net /axi-221226-propellor-66663-detail.html   (709 words)

  
 Sculpture Based on Propellorized Polyhedra
The propellor operator is fundamentally a topological operation—it determines an arrangement of vertices, edges, and faces that it produces.
In this "propello-Archimedean," a propellor consists either of a pentagon and the five surrounding tetragons or a hexagon and the six surrounding tetragons.
The propellor operation and the normalization to midscribed form both preserve the rotational symmetry of the underlying Platonic solid.
www.georgehart.com /propello/propello.html   (3258 words)

  
 Program Files\Netscape\Communicator\Program\BOBSPAGE\calcman1
Locate the RPM section on the outer disk, hold the disk with the RPM section uppermost, rotate the inner disk until the Propellor diameter in inches is uppermost, align the arrow pointing to the airspeed and thrust windows in the inner disk with the RPM 12(12000).
Note that the speed capability of the Propellor may not be achieved in practice if the model is to big and /or heavy for the size of the motor used.
this is modified by the losses associated with the Propellor and the efficiency, which is a function of the advance ratio J. The advance ratio is a function of the forward velocity of the Propellor and the RPM.
pages.sbcglobal.net /limeybob/calcman1.html   (2076 words)

  
 Newton of the Mind - The Propellor of Keely's Airship Described (pdf)
It was not until he had invented his marvelous researching instruments that his true work of evolution began in 1888, which, completed in 1893, has now borne the test of demonstration and given him command of a vibratory circuit for running machinery, both for terrestrial use and for aerial navigation."
Keely's "propellor" is similar to the present day ion drive systems yet very different.
He claimed this propellor would propel his airship at 300 mph - and this is in 1890!
www.svpvril.com /CATALOG/pdf29488.html   (185 words)

  
 Chapter 6: Aerodynamics
The toy is easy to make, being nothing more than a propellor on a stick, but the physics behind its stability in flight are not so simple.
To make the propellor shape, we are removing only the wood on the top right side.
Now turn the block over, and repeat, shaving off the right side only, so the propellor blade is a thin piece of wood, at a pronounced angle to the hole.
www.scitoys.com /scitoys/scitoys/aero/proptoy/proptoy.html   (493 words)

  
 Jetstar ECN-20293: JetStar
These propellors were designed to rotate at a tip speed faster than the speed of sound.
The drive motor, with a 24 inch test propellor, was mounted in a pylon atop the JetStar.
The JetStar was equipped with an array of 28 microphones flush-mounted in the fuselage of the aircraft beneath the propellor.
www.dfrc.nasa.gov /Gallery/photo/Jetstar/HTML/ECN-20293.html   (323 words)

  
 Decavitator Configuration History   (Site not responding. Last check: 2007-10-08)
The concept of using an air propellor was initially introduced as a joke, but its advantages became apparent as the project progressed.
A water propellor was considered, but the air propellor and Daedalus-like fuselage were kept.
In retrospect, the air propellor turned out to be Decavitator's greatest advantages as well as one of its greatest limitations.
lancet.mit.edu /decavitator/ConfigHistory.html   (744 words)

  
 COZY NEWSLETTER #47 October, 1994
The propellor flange separated from the extension, and the flange and the propellor bolted to it departed the airplane.
The propellor and flange were not recovered, but examination of the remaining portion of the extension (by others) indicated that it was a fatigue failure.
Mike says that on his airplane with his propellor, the resonant frequency for the Brock extension is about 2750 rpm, and that he considers speeds up to 2600 rpm to be safely under the resonant frequency.
www.cozybuilders.org /newsletters/news_47.html   (5965 words)

  
 Solar Airship, fundamental engineering principles
Outside the propellor rim, not in the path of air flow, are the separate vanes
Inside are the propellor blades, without a hub: the center is empty to ease air flow.
The turbine wheel and the centerless propellor are the same unit, outside and in.
www.geocities.com /jthunderbird/solarair.html   (1505 words)

  
 RIBnet Forums - Propellor Pitch
I have been informed that I need a higher pitched propellor but I'm not too sure what the figures mean in the motors book.
IE which propellor I should be changing to.
I think my engine has a Mark 11 Tohatsu propellor which in metric is 268mm dia X 287mm pitch.
www.rib.net /forum/showthread.php?t=3723   (484 words)

  
 OrionRobots : Propellor
The blades are angled so they push the medium(that is the air or water - both refered to also as fluids in this context) in a direction continuously.
Helicopters use a very specialised propellor in which each individual blade can be rotated and positioned as they rotate.
They take their name from the fact that the force in a Propellor or rotor is Helical - that is spiral like.
orionrobots.co.uk /tiki-index.php?page=Propellor   (136 words)

  
 Tvindy: GROW
If you want to bubbles over the mountain, be sure not to introduce the propellor to soon, so it will not have a chance to grow.
This results in extra points, but the downside is that the propellor is destroyed and cannot be developed.
And the more fully-developed the propellor is when it merges with the whirlwind, the more bonus points you get.
tvindy.typepad.com /tvindy/2004/02/grow.html   (2143 words)

  
 The Helica.
Note the complete absence of any guard for the propellor; it is difficult to believe this would have been street-legal.
One advantage of propellor traction is that a slippery road surface does not affect propulsion; however, since friction between wheels and road is still required for braking and steering, this might not be very useful.
Note the propellor is now four bladed, possibly to reduce noise and vibration.
www.dself.dsl.pipex.com /MUSEUM/TRANSPORT/helica/helica.htm   (539 words)

  
 Vire 7 - Bulletin Board - Propellor Size   (Site not responding. Last check: 2007-10-08)
Please E-mail the Webmaster with the details (diameter, pitch and number of blades, and any extra information that you have, such as length and displacement of boat, speed achieved, and RPM achieved, if you know those figures).
A survey of just five boats (four of the entries come from two boats) is not very extensive.
So, if you know the details of the propellor fitted to your Vire 7, please E-mail the Webmaster with the information.
indigo.ie /~vire7/topic017.htm   (119 words)

  
 Design Notes   (Site not responding. Last check: 2007-10-08)
The piston propellor combination can usually output known power at prescribed rpm (provided by engine manufacturer).
Vertical and turning climbing flight design for the traditional piston-propellor combination is strongly influenced by the powerplant.
In the design project the first two are not a factor.
www.rit.edu /~pnveme/EMEM675/design_notes.html   (501 words)

  
 Prop Info   (Site not responding. Last check: 2007-10-08)
The most important factor in choosing the right propellor is choosing the propellor with the right amount of pitch.
The pitch of the propellor is the distance that it travels in one complete revolution.
As the propellor thrust the water astern, the reaction to that action moves the boat forward.
members.aol.com /meljohn999/Page2.html   (1249 words)

  
 CGTalk - automating a propellor animationin max 5.1
For the propellor one, it's a basic p38 model, but I'd love to have the propellors be animated.
The bad news is that I made a mess: I'm really inexperienced when it comes to animations so be forewarned: I detached the propellor from the plane, then linked it to a dummy object and rotated that.
I animated the propellor, then linked it to the plane, but now the propellor starts animating at a weird angle.
forums.cgsociety.org /showthread.php?t=136148   (960 words)

  
 Articles - Glider   (Site not responding. Last check: 2007-10-08)
A third type, termed touring motorglider, has a conventional layout with a motor and propellor on the front of the aircraft.
In the United Kingdom, where gliding is regulated by the British Gliding Association, pilots of self-sustaining gliders, like those of pure gliders, do not have to be licensed with the United Kingdom Civil Aviation Authority.
An instructor must provide instruction and sign the logbook of the pilot to authorize the launch method, which may be by airplane towing, ground launch (winches, bungee, auto tow, etc.) or, in the case of a suitable motor glider, by self-launching.
www.seekj.com /articles/Gliders   (2684 words)

  
 Airliners.net Tech Ops: Physically Handling An Airplane Propellor   (Site not responding. Last check: 2007-10-08)
It is important however because it does tell you the gear train in the engine has the proper backlash and the thrust bearing is allowing the crankshaft to float properly.
When you are checking the blades, etc., your body should be squarely in front of the propellor, so, that if any blades start moving, all you do is yank your hands back and you're okay.
The method my CFII reccomends does not cause the propellor to be twisted in it's direction of motion, rather he has me gently twist the blade with one finger to ensure that the prop will not change it's pitch with such a small force as one finger (you don't want a floppy prop).
www.airliners.net /discussions/tech_ops/read.main/46574   (5966 words)

  
 Jetstar ECN-15662: JetStar
These efforts were intended to develop a high-speed and fuel-efficient turboprop system.
NASA's Dryden Flight Research Facility (later the Dryden Flight Research Center, Edwards, CA), in co-operation with the Lewis Research Center, investigated the acoustic characteristics of a series of subscale advanced design propellors in the early eighties.
The tests were conducted on Dryden's C-140 Jetstar, seen here on a research flight over the Mojave desert.
www.dfrc.nasa.gov /Gallery/photo/Jetstar/HTML/ECN-15662.html   (388 words)

  
 Antics, Unclassified, Other, APC (Propellors)   (Site not responding. Last check: 2007-10-08)
APC (Propellors) models not listed in our regular catalogue sections.
Not many pictures or product descriptions in here, but you might just find that obscure model or spare part you are looking for.
Please see bottom of page for links to regular catalogue sections which have APC (Propellors) models.
www.anticsonline.co.uk /x1096_1.html   (188 words)

  
 DIY propellor - RC Groups
Another Pennyplane article describes forming a balsa propellor on a cylinder and making a pitch guage by the Thermal Thumbers of Atlanta.
For advanced math on the subject of propellor airfoils Dr. Martin Hepperle has a wealth of info on model aircraft aerodynamics.
Koichi has a lot of other technical information on his website that is very useful for building Indoor and Micro models including a flight calculator plus schematics for making an Infra Red RX and TX as well as lots of other useful info.
www.rcgroups.com /forums/showthread.php?t=156678   (1142 words)

  
 WaterSkipper the proficient human powered propellor driven pontoon pedal boat   (Site not responding. Last check: 2007-10-08)
The WaterSkipper pedal boat is like a pontoon kickboat, but with pedals, it uses a propellor instead of a paddle.
The WaterSkpper is not one of those inefficient paddle boats you may have tried at your local park.
The human powered WaterSkipper propellor driven pedal boat is a great way to lose weight or increase your total fitness conditioning all while enjoying great outdoor recreation boating.
www.prophish.com /reid-lp-1.html   (207 words)

  
 Yachting and Boating World: Barnacle on Propellor   (Site not responding. Last check: 2007-10-08)
The weather was superb and the sea temperature became hot and barnacle grew at an alarming rate.
The hull was clean with the exception of the propellor and shaft, which were covered almost completely with barnacles up to 3/8 inch in height.
The reduction in speed under power was dramatic.
www.ybw.com /forums/showthreaded.php?Number=411682&page=vc   (203 words)

  
 GlasSkipper the proficient human powered propellor driven pontoon pedal boat   (Site not responding. Last check: 2007-10-08)
The GlasSkipper pedal boat is a fiberglass pontoon boat with pedals, it uses a propellor instead of a paddle.
The GlasSkipper is not one of those inefficient paddle boats you may have tried at your local park.
The human powered GlasSkipper propellor driven pedal boat is a great way to lose weight or increase your total fitness conditioning all while enjoying great outdoor recreation boating.
www.prophish.com /glaskipper.html   (214 words)

  
 KennonAircraftCovers: Engine Covers   (Site not responding. Last check: 2007-10-08)
A larger number will be put on the engine cover and smaller numbers on the prop/spinner covers.
Kennon Propellor Covers are insulated with a waterproof polyester outer shell.
A flap for the oil door or flaps for the cowling inlets can be added as an option on your engine cover.
www.nationalguild.com /KennonAircraftCovers/Engine_Covers.html   (219 words)

  
 Propellor Transports at Schiphol
Propellor Transports at Amsterdan Int'l Airport - Schiphol
By the end of the 1990s things were looking up for Historical Aviation in the Netherlands: we had the Dutch Dakota Association with DC-3s and DC-4s, The Duke of Brabant with its B-25 Mitchell bomber, there was an A-26 Invader, the Fokker Heritage F.27 and the PH-PBY of "CAT Air"...
Later, cargo ramps were added at Schiphol-Center, such as the Romeo- and Sierra-ramps and flights like these were handled there and cargo moved thru warehouses.
www.ruudleeuw.com /spl-props-b.htm   (2129 words)

  
 The Muse's Muse Music Resource: Review Search Results   (Site not responding. Last check: 2007-10-08)
PRoPellor is a system which plugs into your existing site and allows you to directly update the site's content.
You become in charge of content such as Gigs Schedule, News, Reviews, Diary, Guestbook, Songs, Bio - you can update this content through our secure administration system from any computer with access to a web browser, and see these updates on your public site instantly.
I've used PRoPellor for two sites so far (http://www.canoesongs.com and http://www.kristythirsk.com), and it has worked flawlessly.
www.musesmuse.com /cgi-bin/review.cgi?ID=5354   (413 words)

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