Fil:Equal transit-time NASA wrong1.gif
Equal_transit-time_NASA_wrong1.gif (586 × 264 piksler, filstørrelse: 4 KB, MIME-type: image/gif)
Denne filen er fra Wikimedia Commons og kan brukes av andre prosjekter. Beskrivelsen fra filbeskrivelsessida vises nedenfor.
![]() |
En vektorversjon av dette bildet (SVG) er tilgjengelig.
Det bør brukes i stedet for punktgrafikkbildet når det er fordelaktig. File:Equal transit-time NASA wrong1.gif → File:Equal transit-time NASA wrong1 en.svg
For mer informasjon om vektorgrafikk les Commons transition to SVG. Se også information about MediaWiki's support of SVG images.
|
Beskrivelse
BeskrivelseEqual transit-time NASA wrong1.gif |
English: There are many theories of how lift is generated. Unfortunately, many of the theories found in encyclopedias, on web sites, and even in some textbooks are incorrect, causing unnecessary confusion for students.
The theory described on this slide is one of the most widely circulated, incorrect explanations. The theory can be labeled the "Longer Path" theory, or the "Equal Transit Time" theory. The theory states that airfoils are shaped with the upper surface longer than the bottom. The air molecules (the little colored balls on the figure) have farther to travel over the top of the airfoil than along the bottom. In order to meet up at the trailing edge, the molecules going over the top of the wing must travel faster than the molecules moving under the wing. Because the upper flow is faster, then, from Bernoulli's equation, the pressure is lower. The difference in pressure across the airfoil produces the lift. Source: [1] Image was cropped from original slide. |
Dato | |
Kilde | en:File:Equal_transit-time_NASA_wrong1.gif |
Opphavsperson | NASA |
Tillatelse (Gjenbruk av denne filen) |
PD |
Andre versjoner | Derivative works of this file: Equal transit-time NASA wrong1 es.svg |
Lisensiering
Public domainPublic domainfalsefalse |
![]() |
This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.) | ![]() |
![]() |
Warnings:
|
Bildetekster
Elementer som er med i denne fila
motiv
1. jun. 2009
4 585 byte
264 piksel
586 piksel
image/gif
39e436eeea1da29abd929307dd03060aa57b56f5
Filhistorikk
Klikk på et tidspunkt for å vise filen slik den var på det tidspunktet.
Dato/klokkeslett | Miniatyrbilde | Dimensjoner | Bruker | Kommentar | |
---|---|---|---|---|---|
nåværende | 1. jun. 2009 kl. 20:32 | ![]() | 586 × 264 (4 KB) | wikimediacommons>Retama | {{Information |Description=There are many theories of how lift is generated. Unfortunately, many of the theories found in encyclopedias, on web sites, and even in some textbooks are incorrect, causing unnecessary confusion for students. |
Filbruk
Den følgende siden bruker denne filen: