6th Grade Pupil’s Book • UNIT 4 - The history of the aeroplane • Lesson 2, p.43
.
Look at the pictures of the planes, read the information and answer the questions in the quiz at the end.
During the activity, you can refer to your Student's Book, the English-Greek Wordreference online dictionary at http://www.wordreference.com/engr/ or your notes to understand an unknown word.
During the activity, you can refer to your Student's Book, the English-Greek Wordreference online dictionary at http://www.wordreference.com/engr/ or your notes to understand an unknown word.
1) Passenger and cargo planes
These planes carry passengers and cargo. Their speed is just below the speed of sound (350-750 MPH). Their engines are very powerful and they can travel very quickly with many people and goods.
1,235 km/h or 760 MPH is the speed of sound. Supersonic planes can fly up to three times the speed of sound . They have a special engine and they are designed using lightweight materials.
A British Airways Concorde. It had a top speed of Mach 2 or 2.179 km/h or 1.300 MPH |
The SR-71B Blackbird holds the record for the fastest plane ever. It could travel at 3 times the speed of sound or 3,500 km/h or 2200MPH. It was a spy plane. |
3) Rockets
Rockets fly at speeds 5 to 25 times the speed of sound as they orbit around the earth. They have a very powerful engine in order to travel to space.
The Space Shuttle Discovery and its seven-member crew liftoff from Kennedy Space Center's launch pad on 28th October 2007. |
Space shuttle Endeavour docked to the International Space Station in orbit around the Earth. |
Propeller aircraft use one or more propellers to create thrust
in a forward direction. Most of these planes can fly at 100-350 MPH. Examples of this kind of planes are the two- and four-seater passenger planes and seaplanes that can land on water.
in a forward direction. Most of these planes can fly at 100-350 MPH. Examples of this kind of planes are the two- and four-seater passenger planes and seaplanes that can land on water.
A two-seater plane |
A four-seater plane |
Δεν υπάρχουν σχόλια:
Δημοσίευση σχολίου