|Search||Hot Links||What's New!|
Please let me remind all of you--this
material is copyrighted. Though partially funded by NASA, it is still a private
site. Therefore, before using our materials in any form, electronic or otherwise, you need
to ask permission.
There are two ways to browse the site: (1) use the search button above to find specific materials using keywords; or,
(2) go to specific headings like history, principles or careers at specific levels above and click on the button.
Teachers may go directly to the Teachers' Guide from the For Teachers button above or site browse as in (1) and (2).
So far, we have discussed only induced drag. There are also skin-friction drag and form drag, which are referred to as parasite drag. All drag other than induced drag is parasite drag.
Skin-friction drag is caused by the friction between outer surfaces of the aircraft and the air through which it moves. It will be found on all surfaces of the aircraft: wing, tail, engine, landing gear, and fuselage. Form drag is also a resistance to the smooth flow of air. The shape of something may create low-pressure areas and turbulence which retard the forward movement of the aircraft (see figure 4-9). Streamlining the aircraft will help eliminate form drag. Parts of an aircraft which do not lend themselves to streamlining are enclosed either partially or wholly in covers called fairings which have a streamlined shape.
Send all comments to firstname.lastname@example.org
© 1995-2013 ALLSTAR Network. All rights reserved worldwide.
|Funded in part by||From
Civil Air Patrol
Updated: December 23, 2008