aviation history - Why do older airplanes have a wing on both the …
Aug 27, 2015 · Monoplanes of that time needed even more wire bracing. Look at the picture of a replica of the Etrich Taube, a very popular plane of the pre-WW I period. Etrich Taube in flight. Note the truss below the wing and the many wires keeping it in shape (picture source). The shorter wingspan of a biplane also reduces the load on the wings.
lift - Does bi-wings create essentially double the uplift as single ...
May 24, 2020 · If by bi-wings you mean a biplane then the airflow above the lower wing and the airflow below the upper wing interfere with each other and lift is lost. The loss is kept acceptable if the gap is at least 1.25 times the wing chord, but it is still maybe 20% depending on the design.
What are the advantages of twin-fuselage aircraft?
Feb 28, 2015 · There's an entirely new type of twin fuselage plane being designed. It is really something halfway between a flying wing and a twin fuselage, so if this counts as twin fuselage for your purpose you'll need to decide for yourself. It's called the Flying-V, and the reason for the design is to get a lot higher fuel efficiency. It's basically ...
What are the different wing planforms? What are each's …
Aug 30, 2015 · Delta The delta is a very low aspect ratio wing used in supersonic aircraft, most notably in the European designs. The main advantages of the delta wing is that is efficient in all the flight regimes (subsonic, transonic and supersonic). Also, the wing offers a large wing area for the shape, reducing wing loading and improving maneuverability.
Aerodynamics of double winglets - Aviation Stack Exchange
Jun 10, 2018 · $\begingroup$ Good point. Actually I was thinking about downwash thing and was going to add something about the "outwash" generated by the winglet itself (of the upper one; "inwash" of the lower one) counteracting the circulation and that could be thought of equivalent of adding span, but I think the energy recovery of the lift generated by the winglet itself is the biggest factor and is the ...
Why do many fighter jets have double vertical stabilizers?
Feb 15, 2016 · Many fighter jets have double vertical stabilizers, e.g. F-14, F-15, F/A-18, F-22: On the contrary, most general aviation planes and commercial airliners do not. While there are certainly exceptions in both categories, I think it is fair to say that this design is, comparatively, far more common in fighter jets.
Do box-wings suffer from induced drag the same way as normal …
As mentioned in the original post, there is a new aircraft configuration that is often mistaken for a box wing design. However, it is nothing like them. It's called a box-tail or double boxtail configuration. I am the designer of the Synergy double boxtail aircraft, which is the first such aircraft to be developed.
supersonic - What are the advantages and disadvantages of a …
Note the canard wing, which has little sweep and a low aspect ratio: This kind of wing is ideal for supersonic flight, provided it has a low relative thickness. The main wing of the XB-70 is a delta wing to keep the take-off and landing speeds relatively low and offers the best compromise of low and high speed characteristics.
Is multi element wing good option for slow flight airplanes?
Aug 6, 2020 · For using a multi-element wing for slow flight airplanes, unfortunately these aggressive designs create lots of load, but also lots of drag. For an F1 car, the drag polar can be anywhere between 3.5 and 5 depending on the configuration.
Why is the A380 a double-decker rather than a longer airplane?
Sep 21, 2018 · That's right, having a longer plane would reduce drag by lowering the cross section (altho there is also drag linked to the surface area of the plane). There is a few reasons why you don't want to do it: Cylinders don't scale this way: Take a cylinder with a radius of 1 and a height of 10. Volume is ≈31.41. Double the height, volume is ≈62.83