sweepback wings
hey
i was wondering what do u say when someone in an airline interview asks you what is the advantage of sweepback wings? i know they create less induced drag and are more aerodynamic, and do something to delay the transonic drag rise. will appreciate your response, other than "try google" :P thanks, vin |
You're in the wrong thread, vin. Try "Tech Log"
|
Try Wikipedia ! I did :E
|
can someone please move it, and can someone please answer it... :)
|
Swept wings increase the Mach Crit value. A swept wind also provides better stability in turbulence. Disadvantages - they dont generate as much lift as a conventional straight wing, hence most turboprops have straight wings and have much better performance for operating from smaller runways etc. Theres a few more advantages/disadvantages but those are the main ones
|
[From "AFT systems"]
In comparison to a straight wing; + Delayed compressibility effects + Increase MCRIT, MDRAG RISE + Flatter CL curve, so less effected by both speed and AOA changes(less gust sensitivity and reduced CL loss with speed decrease). + Less induced drag + Better lateral stability - Tip stalling, (there are plenty of good threads on here about this...) - Generate less lift - Reduced CL max and a higher stalling AOA (poor low speed lift) - Can have too much lateral stability = dutch roll - HIGH induced drag at high angles of attack (high drag at low speed, i.e. approach) |
thanks... i read something, http://www.adl.gatech.edu/classes/hi...Drag_Rise.html
the figure 0.7M is something that i found everywhere... is this the mach number till which the drag co-efficient remains the same?? whats the funda... if u put the cruise speed and the sweepback angle of any airplane in the formula M'=M/cos (sweepback) u end up getting 0.7 again. and whats this compressibility thing. confused about it. i am kinda confused... have a Air india interview soon and this is their favourite question and they really hit u hard with this... |
All times are GMT. The time now is 00:29. |
Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.