Four Informative Facts About Helicopters

Interesting facts about helicopters include their description

, performance, drawbacks, and history.

Even though helicopters took a while to develop, they now go side by side with almost all fixed-wing aircrafts. And even though they have their weaknesses, their overall flexibility still makes them a common choice among civilians.

Description

A helicopter is a kind of rotorcraft wherein lift and propulsion are provided by 1 or more horizontal rotors. Even though researches propose that more than 2 horizontal blades should be used, it has never really been tested. Because of these rotors, helicopters have the ability to land and set off in isolated sites that other fixed-wing aircrafts would probably never be able access. Fixed-wing aircrafts require an airstrip, unlike helicopters. Moreover, helicopters also have the ability to hover for a lengthy time and carry out procedures during rescue operations or helicopter lessons that differentiate them from other kinds of aircraft. The horizontal rotors make a helicopter an exceptional aircraft because they are responsible for enabling it to elevate and takeoff without the need to propel in a forward direction. Helicopters have a special flexibility function that can not be found in other typical fixed-wing aircraft. Not even the military's own tilt-rotor aircrafts and VTOL jets can perform with the flexibility that helicopters provide.

Performance

The unique abilities of a helicopter are made possible by the rotors that are lined up horizontally. Some rotors, especially in several modern models, are capable of being articulated, enabling them to shift from vertical to horizontal propulsion. Because of this ability to articulate, these aircrafts can make fast alterations of directions whether from front to back, or side to side. A lot of helicopters that utilize only one rotor usually still have one more rotor on the rear. The rotor on the tail neutralizes the natural tendancy of the aircraft to move in the opposite direction as the rotor. This is where two rotors become useful in contrast to just one - to prevent the aircraft from spinning around in circles because each of the blades counterbalances the other's effect.

Downsides

Helicopters are amazing aircrafts, but they are not perfect. Because of their ability to land and lift off the way they do, they have features that are less helpful compared to a fixed-wing aircraft. They can not attain the same velocity as fixed-wing aircrafts largely due to the configuration of their rotors that allow them to stall and perform other aerodynamic feats. Additionally, these aircrafts also don't have very high max altitudes or service ceilings, they are noisy, and they have a tendency to vibrate heavily.

History

There were helicopters created in the past but none of them actually had any practical use, until 1923 when Juan de la Cierva of Spain first piloted his helicopter. A few years later, the first helicopter that was dependable enough to be mass produced, the R-4 by Igor Sikorsky, was produced. And the first helicopter that was approved to be utilized by civilians, the Bell 47, was revealed in 1946.

Just like any other kind of vehicle, helicopters can be damaged, experience loss of control, or cause fatalities when they are not operated properly.

by: Patricia Strasser

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