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2-1 FINALS > HELICOPTER > Flashcards

HELICOPTER Flashcards

1
Q

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.

A

BLADE TWIST

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2
Q

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

A

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

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3
Q

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

A

BLADE TWIST

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4
Q

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

A

BLADE TWIST

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5
Q

Blade twist sections

A

SECTION NEAR ROOT
SECTION IN CENTER
SECTION NEAR TIP

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6
Q

TRUE/FALSE

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

A

TRUE

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7
Q

TRUE/FALSE

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

A

FALSE

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8
Q

TRUE/FALSE

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

A

FALSE

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9
Q

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

A

HUB

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10
Q

the farthest outboard section of the rotor blade

A

TIP

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11
Q

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

A

ROOT

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12
Q

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

A

TWIST

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13
Q

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

A

versatile

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14
Q

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.

A
  1. hover
  2. land on uneven ground
  3. travel vertically
  4. horizontally and every other direction in between
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15
Q

two main types of engine

A

reciprocating engine, turbine engine

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16
Q

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

A

reciprocating engine

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17
Q

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

A

turbine engine

18
Q

It has a better power-to-weight ratio.

A

turbine engine

19
Q

the fastest known speed of a helicopter is ___ knots

A

225 knots

20
Q

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

A

landing gear

21
Q

Most common landing gear

A

skids and wheels

22
Q

Fairly common landing gears

A

bear paws, floats, and pontoons

23
Q

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

A

bear paws

24
Q

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

A

2015

25
Q

DARPA

A

Defence Advanced Research Projects Agency

26
Q

The longest helicopter flight without landing was _____ miles

A

2,213 miles

27
Q

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

A

tail rotor

28
Q

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

A

tail rotor

29
Q

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

A

Fenestron

30
Q

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

A

Electrical tail rotors

31
Q

ETR

A

electrical tail rotor

32
Q

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.

A

main rotor

33
Q

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

A

laminated wood and fabric

34
Q

He holds the patent for the rotor mast from 1965

A

Trench Charles Henry

35
Q

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.

A

cockpit

36
Q

Four main controls a helicopter pilot must use in flight:

A

cyclic, collective, anti-torque pedals, and throttle

37
Q

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

A

1700s, sailing

38
Q

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

A

World War II

39
Q

PARTS OF A HELICOPTER

A

Cockpit
Main rotor
Tail roto
Landing gear
Engine

40
Q

a rotor-controlled aircraft with a complex anatomy.

A

helicopter

41
Q

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

A

helicopter

2-1 FINALS (5 decks)

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