When a swept wing is flying in a sideslip, the windward side behaves like a wing with less effective sweep $\varphi_{eff}$ and the leeward side like one with more effective sweep. Wing sweep causes a flattening of the lift curve slope for two reasons: The effective angle of attack is reduced by the cosine of the sweep angle.

2016年3月17日 · Swept wings are beneficial at transonic flight regimes (M=0.8-1.2). At transonic flight regimes there is a drastic increase in drag (CD is more or less constant up until that point) due to the effects of compressibility, which manifest themselves in local sonic regions on the wing (the plane itself can be flying at M=0.78, yet over some portions of the wing, where the …

2015年8月30日 · In order to overcome this, swept forward wings were used in a few (experimental) aircraft. The man problem with swept forward wing is that it produces wing twisting as it bends under load, resulting in greater stress on the wing root than for a similar straight or swept back wing. One of the few aircraft to use this wing is the Sukoi Su-47 Berkut.

Straight wing is more efficient, but once the flow over it exceeds speed of sound—and the increase in speed over the wing means it happens about M0.70–0.75 (70–75% of speed of sound)—its drag increases significantly. Swept wing delays this effect, because only the component of airflow velocity perpendicular to the wing causes it.

2024年9月26日 · Short answer: For a swept wing, the critical Mach number is defined as the free-stream Mach number at which we see a sonic velocity component, in the direction perpendicular to the wing's leading edge. As the sweep angle increases, this velocity component is initially scaled down by a factor of cos(Λ), and so a greater free-stream Mach is ...

2023年8月17日 · The benefits of a swept wing have already been known at least since 1935 when A. Busemann presented a paper at the Fifth Volta Conference in Rome about the advantages of a swept wing at supersonic speed (Busemann, A. - "Aerodynamicher Auftrieb bei Überschall Geschwindigkeiten" Luftfahrtforschung, Bd 12, Nr 6, October 3, 1935, pp. 210-220).

2004年5月4日 · On more normal planes with only slight sweeps and tapers this is not much of an issue, but my B-52 has a highly swept wing with good degree of taper, not to mention a rather fat fuselage for a sloper. Depending on what "root" chord I use, the calculated CG will vary quite a bit.

2015年2月23日 · On a standard configuration (Rear-swept wing), this of course moves from the wing root to the wingtip. On a forward-swept wing, however, this moves from the wingtip to the wing root. As a result, the dangerous tip stall condition of a backwards-swept design becomes a safer and more controllable root stall on a forward swept design.

2017年7月23日 · Earlier swept wing designs sometimes had trouble to achieve docile stall characteristics which led to the introduction of stick shakers. Today, changing the airfoil shape over span (aerodynamic washout) and wing twist (geometric washout) are combined to ensure that stall starts at the wing root.

2010年5月6日 · Swept wing rib alignment: KC10Chief: Modeling Science: 8: Oct 14, 2009 02:36 PM: Wanted: GLH swept wing plane: zaskarkid: Electric RC Airplanes (FS/W) 8: Sep 18, 2009 10:39 AM: Discussion: Wally Glider Forward-Swept Wing: sr71fan: Parkflyers: 4: Oct 16, 2007 01:58 PM: forward swept wing outa WallMart glider? Kyle Jones: Parkflyers: 0: Jun 10 ...