Right. Google doesn't know anything about it. Your search - *Plessaman "The Meaning of Lift"* - did not match any documents.
Suggestions: - Make sure all words are spelled correctly. - Try different keywords. - Try more general keywords. - Try fewer keywords. *-- Russ Abbott* *_____________________________________________* *** Professor, Computer Science* * California State University, Los Angeles* * Google voice: 747-*999-5105 * blog: *http://russabbott.blogspot.com/ vita: http://sites.google.com/site/russabbott/ *_____________________________________________* On Sat, May 7, 2011 at 4:02 PM, Grant Holland <[email protected]>wrote: > Peter - Fascinating. > > I too vote that you make available to the FRIAM alias your referenced paper > so that we all can get the benefit of you wisdom on this. > > Grant > > > On 5/7/11 1:22 PM, [email protected] wrote: > > The videos are wonderful, and I thank Nick, and agree with his opinion. > As for the Theory of Tornadoes, it seems that to date it's literally a case > of "God only knows"! But mebbe Friam, too. I have 1/2 century background > teaching grad fluid mechanics at Caltech, Stanford, and USC and have done a > lot of meteorological field work, but really wouldn't try to discuss the > subject. I jus' dunno. > > > > One should remember that what one sees is a LOT less than what one gets, > because that's where the tracer happens to be. This I expressed vividly to > my students in auto design, when we took pix of airflow near bluff vehicles > on test tracks in the Mohave Desert. A'course there is a huge billowing > plume that presages before, and persists long after the vehicle is over the > horizon. I remind them that it was not the "dust" doing this, but the air, > and an identical disturbance occurs invisibly whenever a body passes through > air. To paraphrase, "its bite is just as keen, although it is not seen"! > Makes one take car streamlining seriously. I actually hold patents on one > of those drag shield things that goes on the cab of a tractor-trailer rig, > that was developed on NSF funding at our test base near El Mirage in the > Mohave. Does good things for fuel consumption. > > > > It would seem likely that the sense of the vorticity in a tornado is > related to the *shear* and *Coriolis* Effect ( Gaspard-G, 1835), although > which way, I know not. I was manager of a big DOE program called the > Coriolis Project for three years, so dealt a little with that. Lotta spin > on the ball, there, literally! For smaller scale vortical flow Coriolis > does not apply. Some interesting anecdotes: In East Africa, delightful > Kikuyu tricksters, stand right on the equatorial line and for a few > shillings will show you the exit vortex from plastic bucket, then move it > north over the line a few feet into t'other hemisphere and "prove" that it > rotates in the opposite direction. We seen this! Well, it really does, but > not because of Gaspard-Gustave. In the Libyan deserts Holy Men will > "attack" a dust devil, with much imprecation and flailing of a broad sword - > and "kill" it. It just drops to the ground! You can see this. With your > own eyes. Allah is indeed great! According to Bagnold, a great Brit > desertologist and fluid mechanicer, whom I have used for some of his > results, the secret is to determine in advance what the sense of the vortex > is, and then to enter it on the upwind side, at just the right distance from > the core, and flail around . It works, too. Ralph Bagnold, soldier, > explorer and scientist, whose monumental work I'm lucky to have > and reference, was portrayed in The English Patient. Pity when one is > better known for a movie than an important book! > > > > The subject of how wings work is a much vexed topic. I was interested in > what Nick said, but for my part, I don't think it is like that , and > I reckon the air doesn't think so either. Authors, profs, and pilots (and I > have been all three) are usually wrong on this topic. I respect only real > airfoil designers on this issue, and have a few honest-ta-God airfoils named > after me, that can be seen on the internet and in books. They all worked > much better than we expected. In fact they have carried, safely, many men > and women to record heights. There's an article in the Smithsonian about the > first airfoil I designed, in 1955, that me delightfool, but authoritarian, > Teutonic boss-fuhrer, Herr Doktor Oberst Gustave Von ---, refused to name > after me. Well, it flew nobly for the RAF, carried nuclear payloads in the > good old, bad old days and kept the Ruzskies at bay. Mebbe!. > > > > I have given up noting the incorrect theories on lift. Life too short for > that, although if one restricts one's discussion to things one > knows conversation gets pretty limited. I am content to simply observe what > the air does, and weakly agree with it, much as my intellect may reject that > pusillanimous attitude. As an expert witness, I have frequently quoted: > "Theory crumbles before the Facts". Juries like it. But some years ago, > while on the USC aero faculty, I decided to quit pointing out mistakes and > publish my idea of the Truth. The paper (1996) is *The Meaning of Lift*, > published as AIAA 34 th Aerospace Sciences Meeting, paper 96-1191. Funny > thing is that, as a joke, I started calling it *The Meaning of Life*, and > that has made it difficult to find by computer, but not by real people! > Well, wot the Hell, for me and most of my fellow spirits up in the Big Blue, > Lift IS Life! > > Peter Lissaman, Da Vinci Ventures > > Expertise is not knowing everything, but knowing what to look for. > > 1454 Miracerros Loop South, Santa Fe, New Mexico 87505,USA > tel:(505)983-7728 > > > ============================================================ > FRIAM Applied Complexity Group listserv > Meets Fridays 9a-11:30 at cafe at St. John's College > lectures, archives, unsubscribe, maps at http://www.friam.org > > > ============================================================ > FRIAM Applied Complexity Group listserv > Meets Fridays 9a-11:30 at cafe at St. John's College > lectures, archives, unsubscribe, maps at http://www.friam.org >
============================================================ FRIAM Applied Complexity Group listserv Meets Fridays 9a-11:30 at cafe at St. John's College lectures, archives, unsubscribe, maps at http://www.friam.org
