What does tube mean in English?

What does tube mean in English?

1 : any of various usually cylindrical structures or devices: such as. a : a hollow elongated cylinder especially : one to convey fluids. b : a soft tubular container whose contents (such as toothpaste) can be removed by squeezing. c(1) : tunnel.

What is a glide in speech?

Glides include speech sounds where the airstream is frictionless and is modified by the position of the tongue and the lips. Glides immediately precede a vowel; they are less sonorous than the vowel they precede. Semivowels immediately follow a vowel in the syllable. These too are less sonorous than a vowel.

How does glide work?

The technology behind Glide is what sets the app apart from others like it. The company uses a proprietary video system that streams messages back and forth instead of sending the full video file from device to device.

What are the main parts of a glider?

Parts of a Glider

  • fuselage.
  • wings.
  • control surfaces.
  • landing gear.

Why do gliders carry water?

Apart from basic training two seaters, most gliders have the ability to carry water ballast. The sole reason for carrying water ballast is to increase the cross country speed on a task. This means a high wing loading gives the glider the same sink rate but at a higher cruising speed.

How far can you fly a glider?

How far can a sailplane fly? As of August 2004, the world record was 3,009 km (1,869 miles), flights of 500 km (310 miles) are common, and 1,000 km flights are not uncommon.

Are bigger wings better?

Larger wings also increase drag, which will increase the required power, or thrust, to move the aircraft forward. This means bigger engines and more fuel will need to be carried. Also, large wings are often longer than small wings. Long wings bend a lot more, and the wings need to be made stronger.

Why are bigger wings better?

The larger the wing, the more lift it can generate and the more weight it can support, all else being equal. Larger wings are usually efficient at lower speeds, and allow for lower takeoff and landing speeds… again, all else being equal.

Why do bigger wings help you fly better?

The shape of the wing ensures that air passing over the top of the wing travels faster than the air below — this pressure difference provides the lift for the bird. The larger the surface area of the wing, the greater the lift.

Why are elliptical wings better?

“…the real advantage of the elliptical wing turned out to be its low induced drag at very high altitudes, such altitudes not having been considered during the design, but realised during the war, helping to keep Spitfire in the front line during rapid development under Joe Smith.

Why are elliptical wings not used anymore?

Elliptic wings have several disadvantages: They have poor stall characteristics, because the tip stalls first, causing violent roll. Since the Reynolds number goes down as you move outwards along the wingspan, the tip of an elliptical wing has a lower stall angle of attack than the wing center.

Why did Spitfires have elliptical wings?

The Spitfire conducted its maiden flight on 5 March 1936. The elliptical wing was decided upon quite early on. The ellipse was simply the shape that allowed us the thinnest possible wing with room inside to carry the necessary structure and the things we wanted to cram in. And it looked nice.