HELICOPTER

Question 1

Because of lift differential due to differing rotational relative wind values along the blade, the blade should be designed with a TWIST to alleviate internal blade stress and distribute the lifting force more evenly along the blade.

Answer 1

BLADE TWIST

Question 2

Because of lift differential due to differing rotational relative wind values along the blade, the blade should be designed with a

Answer 2

TWIST to alleviate internal blade stress and distribute the lifting force more evenly along the blade.

Question 3

provides higher pitch angles at the root where velocity is low and lower pitch angles nearer the tip where velocity is higher.

Answer 3

BLADE TWIST

Question 4

This increases the induced air velocity and blade loading near the inboard section of the blade.

Answer 4

BLADE TWIST

Question 5

Blade twist sections

Answer 5

SECTION NEAR ROOT
SECTION IN CENTER
SECTION NEAR TIP

Question 6

TRUE/FALSE

“More nose-down” tilt to blade section closer to tip

Answer 6

TRUE

Question 7

TRUE/FALSE

“Less nose-down” tilt to blade section closer to tip

Answer 7

FALSE

Question 8

TRUE/FALSE

“More nose-down” tilt to blade section further to tip

Answer 8

FALSE

Question 9

on the mast, the attaching point for the root of the blade, and the axis about which the blades rotate.

Answer 9

HUB

Question 10

the farthest outboard section of the rotor blade

Answer 10

TIP

Question 11

the inner end of the blade and is the point that attaches to the hub

Answer 11

ROOT

Question 12

the change in blade incidence from the root to the outer blade

Answer 12

TWIST

Question 13

Helicopters are used for many different reasons and they may be the most ______vehicle in the world

Answer 13

versatile

Question 14

A helicopter can do it all: 1._____,2._____3.______4._____________
From leg-like skids to electric tail rotors, it will be interesting to see how much further the helicopter develops.

Answer 14

1. hover
2. land on uneven ground
3. travel vertically
4. horizontally and every other direction in between

Question 15

two main types of engine

Answer 15

reciprocating engine, turbine engine

Question 16

use one or more pistons to convert pressure into a rotating motion creating power

Answer 16

reciprocating engine

Question 17

use a process of pressurized air mixed with fuel to create high-velocity gas to turn the turbine wheels

Answer 17

turbine engine

Question 18

It has a better power-to-weight ratio.

Answer 18

turbine engine

Question 19

the fastest known speed of a helicopter is ___ knots

Answer 19

225 knots

Question 20

Comes in different forms but skids and wheels are the most common.

Answer 20

landing gear

Question 21

Most common landing gear

Answer 21

skids and wheels

Question 22

Fairly common landing gears

Answer 22

bear paws, floats, and pontoons

Question 23

are attached to the skids and used for helicopters landing off airport on uneven, unstable and soft terrain helping with overall stability

Answer 23

bear paws

Question 24

In what year did DARPA introduced a robotic landing gear that could fold like legs, making landing or uneven terrain much easier

Answer 24

2015

Question 25

DARPA

Answer 25

Defence Advanced Research Projects Agency

Question 26

The longest helicopter flight without landing was _____ miles

Answer 26

2,213 miles

Question 27

Found at the tail end of a helicopter and its primary function is to counteract the torque effect by the main rotor.

Answer 27

tail rotor

Question 28

If it weren't there, the helicopter would spin in the opposite direction of the main rotor.

Answer 28

tail rotor

Question 29

It can have 8-13 blades but are significantly quiter than traditional tail rotors

Answer 29

Fenestron

Question 30

Have been explored as an option to replace the traditional tail rotors, which would be better for the environment,

Answer 30

Electrical tail rotors

Question 31

ETR

Answer 31

electrical tail rotor

Question 32

The most important part of the helicopter. It lets the pilot control which way they turn, change altitude and move laterally. The pilot manipulates these with controls in the cockpit that are linked to the swash plate assembly.

Answer 32

main rotor

Question 33

Rotor blades were made out of _______ and _____ until the 1960s

Answer 33

laminated wood and fabric

Question 34

He holds the patent for the rotor mast from 1965

Answer 34

Trench Charles Henry

Question 35

The central control unit determines all activity of the helicopter. The pilot sits in the cockpit with a co-pilot; helicopters not requiring 2 pilots can have another person in the front seat.

Answer 35

cockpit

Question 36

Four main controls a helicopter pilot must use in flight:

Answer 36

cyclic, collective, anti-torque pedals, and throttle

Question 37

In the ____ cockpit was used as a ______term before being used as an aviation one

Answer 37

1700s, sailing

Question 38

The first reference to an aircraft as having a cockpit was during ______, referring to the small enclosure

Answer 38

World War II

Question 39

PARTS OF A HELICOPTER

Answer 39

Cockpit Main rotor Tail roto Landing gear Engine

Question 40

a rotor-controlled aircraft with a complex anatomy.

Answer 40

helicopter

Question 41

Although it is smaller than an airplane, the fast spinning rotors makes it much more difficult to control.

Answer 41

helicopter