Module 1 Flashcards

(99 cards)

1
Q

designed and built steam engines that were practical in their use to propel wheeled land vehicles.

A

American James Watt (1780s)

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2
Q

Typical steam engines of the mid 1800s were essentially refined versions of Watt’s ____________.

A

simple external combustion steam boilers

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3
Q

considered as the “Father
of Aerial Navigation”, designed and experimented with a calorific engine which burned gunpowder as the fuel.

A

Sir George Cayley (1808)

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4
Q

The gaseous products of combustion drove a piston
within a cylinder that converted the reciprocating piston’s motion to mechanical work, possibly rowing Cayley’s ______or______.

A

“aerial oar or carriage”

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5
Q

successfully flew a clockwork
(wound spring) powered model having the very modern characteristics of mono-wing construction, rear empennage, tricycle gear, and with the propeller located in the nose.

A

Felix du Temple (1857)

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6
Q

In preparing his full scale monoplane in 1874, du Temple’s
search for the __________ caused him to reject the available steam engines (too heavy) and
gasoline engines (unreliable).

A

ideal powerplant

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7
Q

du Temple used a “___________” which was reported to operate in a manner similar to that of a steam engine; unfortunately, the underpowered engine was not able to propel the aircraft
beyond a “___________”.

A

hot air engine
powered hop

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8
Q

Their model experiments employed a miniature steam engine that includes two propellers and gearing.

A

William Samuel Henson and John
Stringfellow (1848)

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9
Q

In full scale experiments which began in 1868, _______ used a larger steam engine based on the successful model engines.

A

John Stringfellow

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10
Q

attached a steam engine to a
bicycle, creating their first powered motorcycle.

A

Michaux brothers (1869)

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11
Q

Russian naval officer and engineer ___________ journeyed to America and then to England where he eventually found two suitable steam engines of __ and __ horsepower (HP) for his flight experiments.

A

Alexander F. Mozhayski (1879)
10 and 20

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12
Q

also conducted flight experiments in in his steam powered “______” aircraft, and even claimed to be the
first man to have successfully flown a heavier-than-air aircraft.

A

Clement Ader (1890)
Eole

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13
Q

Clement Ader’s efforts, also funded by the French War Ministry, resulted in the October 1897 flight of the _______, a bat-winged aircraft powered by two 20-HP steam engines.

A

Avion Ill

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14
Q

__________’s model Aerodrome experiments
used small steam engines. His highly successful flights of the model __________ utilized a 1 HP steam engine. His later efforts in manned flight with his full scale Aerodrome, however, used a gasoline powered engine.

A

Samuel Pierpont Langley (1890)
Aerodrome No.5

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15
Q

It became apparent over time
after the many attempts by numerous inventors that _________ were far too heavy and produced insufficient power for aircraft; an alternative source of power would have to be found.

A

steam powered engines

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16
Q

A crude version of the two stroke engine was initially designed by Frenchman ___________ and patented in 1804. In his design, _____ and _____ was to be ignited in the cylinder at atmospheric pressure, a design which most likely would have resulted in relatively low power output.

A

Phillipe Lebon d’Humberstein (1801)
fuel and air
low power output

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17
Q

patented a somewhat more useful two stroke engine. In their design, the ignited fuel-air mixture pushed
against a free piston within a cylinder which transferred motion to another piston, rotating a shaft.

A

Eugenio Barsanti and Felice Matteucci (1854)

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18
Q

_____________, fascinated by inventing useful devices, began work in 1850 on a new type of engine that ___________ (typically used for street lamps) with atmospheric-pressure air, thereby producing the expanding gases that could be harnessed for the generation of power.

A

Etienne Lenoir (1858)
electrically ignited lighting gas

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19
Q

___________ designed variations of the two cycle _______ non-compressed (atmospheric pressure) gas engine.

A

Nicolaus August Otto and Wilhelm Otto (1866)
Lenoir

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20
Q

The __________, with _____________, then made the critical technical advance of compressing the fuel-air charge before it entered the
cylinder. Later, __________ reorganized his company with ___________ as president, and __________ as chief engineer.

A

Otto brothers with Eugren Langren
Nicolaus Otto
Gottlieb Daimler
Franz Rings

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21
Q

Rings’ most important contribution was to ___________ and to focus on one of Otto’s engine concept, the _____________.

A

discard the free piston idea
four cycle engine

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22
Q

In a four cycle engine, two full rotations of the crankshaft
comprised of four distinct cyclic stroke events produce one complete power cycle.
These are the:

A

intake stroke
compression stroke
power stroke
exhaust stroke

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23
Q

So ingenious and novel an approach was this that the air standard “________”, ascribed to its inventor, is a fundamental engineering thermodynamic
principle.

A

Otto Cycle

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24
Q

____________ and ____________ powered by both two and four cycle engines were being manufactured in relatively small quantities; manufacturing in volume would not be long in coming, however.

A

Gasoline fueled motorcycles and automobiles

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25
The engine used by Langley in the attempted flights of his full sized Aerodrome aircraft was developed by ___________, based on a substantial redesign of a _______ automobile engine.
Charles M. Manly Balzer
26
begins as the piston starts its downward travel from top dead center up to bottom dead center. When this happens, the intake valve opens and the fuel-air mixture is drawn into the cylinder.
intake stroke
26
The early experiments of ___________ and ___________ employed a horizontally arranged inline 4-cylinder, four cycle engine designed by Wright employee and mechanic __________. This engine, which powered the Wright Flyer on December 17, 1903 when Orville flew those memorable 12 seconds over Kitty Hawk, North Carolina, produced a consistent __ HP, peaking to as much as __HP.
Orville and Wilbur Wright Charles Taylor 12 16
27
begins when the fuel-air mixture is ignited. This causes a tremendous pressure increase in the cylinder and forces the piston downward away from the cylinder head, creating the power that turns the crankshaft.
power stroke
28
Reciprocating Engine Operating Principle Process
1. Fuel is vaporized and mixed with air, 2. forced or drawn into a cylinder, 3. compressed by a piston, and then, 4. ignited by an electric spark.
29
is used to purge the cylinder of burned gases. It begins when the exhaust valve opens, and the piston starts to move toward the cylinder head once again.
exhaust stroke
30
The two primary reciprocating engine designs are the __________ and the ___________.
spark ignition (gasoline) compression ignition (diesel)
31
Four-Stroke Five Event Cycle
Each cycle has five events which are intake, compression, ignition, power, and exhaust.
31
The conversion of the resultant heat energy into mechanical energy and then into work is accomplished in the _________.
cylinder
32
The main difference between spark ignition and compression ignition is the __________________.
process of igniting the fuel
33
first compresses the air in the cylinder, raising its temperature to a degree necessary for automatic ignition when fuel is injected into the cylinder.
compression ignition engine
33
use a spark plug to ignite a pre-mixed fuel-air mixture.
Spark ignition engines
34
Reciprocating engines may operate on either a ___________ or ______________ cycle.
two-stroke four-stroke
34
In a two-stroke engine, the conversion of chemical energy into mechanical energy occurs over a _____________.
two-stroke operating cycle
35
The __________, ____________, _____________ and _________occur in only two strokes of the piston rather than the more common four strokes.
intake, compression, power, and exhaust processes
36
consists of one or more rows of odd-numbered cylinders arranged in a circle around a central crankshaft. The cylinder arrangement allowed for good cooling airflow and smooth operation. It consists of a row, or rows of cylinders arranged radially about a central crankcase.
radial piston engine
37
Due to the small size of the crankcase, this radial piston engine had a better __________ than most other designs of their day.
power-to-weight ratio
38
It provides the greatest drag of all the types of engines.
radial piston engine
39
This engine may be either liquid-cooled or air-cooled and aligned in a single row parallel with the crankshaft, which is located either above or below the cylinders.
in-line engine
40
In-line Engine is also considered as _________ because of its cylinder arrangement.
straight type engine
41
If the In-line engine is designed to operate with the cylinders below the crankshaft, it is called an __________.
inverted engine
42
If the In-line engine is designed to operate with the cylinders above the crankshaft, it is called an _________.
upright engine
43
has a small frontal area and is better adapted to streamlining. It also has the least amount of drag.
in-line engine
44
The rearmost cylinders of an air-cooled in-line engine receive relatively little cooling air, so inline engines were typically limited to only ______ or ______ cylinders.
four or six
45
The cylinders on a V-type engine could be above the crankshaft or below it, in which case the engine is referred to as an ___________.
inverted V-type engine
45
are arranged around a single crankshaft in two in-line banks that are 45, 60, or 90 degrees apart. Because it had two rows of cylinders, they were typically capable of producing more horsepower than an in- line engine. It is also considered to provide an excellent combination of weight, power, and small frontal area.
V-type engine
46
are the most popular reciprocating engines used on light aircrafts. It has two banks of cylinders directly opposite each other with a crankshaft in the center. The pistons of both cylinder banks are connected to the single crankshaft.
Horizontally-opposed or opposed type engines
47
Horizontally-opposed or opposed type engines is also considered as ___________
boxer type or flat type engine
48
Advantages of Horizontally-opposed Engine
- low weight-to-horsepower ratio - low vibration characteristics - reduces the engine's frontal area - allows a streamlined installation that minimizes aerodynamic drag - most efficient, dependable, and economical type of engine available for light aircrafts
49
Horizontally-opposed or opposed type engines always have an _______ number of cylinders, and a cylinder on one side of a crankcase "_______" a cylinder on the other side.
even opposes
50
WHY USE COOLING SYSTEM?
- Prevents failure of cylinder material - Avoids oxidation of lubricating oil, which can cause carbon deposits and piston seizure - Minimizes thermal stresses that could distort engine components - Prevents a drop in the engine's volumetric efficiency - Reduces the risk of pre-ignition, detonation, or knocking, which leads to engine power loss.
51
Cooling system serves two purposes in the working of an engine:
- Removes excessive heat to prevent engine overheating. - It keeps the engine at working temperature for efficient and economical working.
52
Two main requirements of an efficient engine cooling system:
- Must remove around 30% of the combustion chamber's heat to maintain engine thermal efficiency. - Should remove heat quickly when the engine is hot, but cool slowly during startup to help parts reach optimal temperatures faster.
53
Problems also occur at over cooling:
- Overcooling increases lubricant viscosity, leading to higher internal friction and power loss. - It reduces the fuel's ability to vaporize efficiently. - For optimal engine efficiency, it must run at the highest safe operating temperatures.
54
TYPES OF ENGINE COOLING SYSTEM
air cooling system liquid cooling system
55
In this type of cooling system, the heat, which is conducted to the outer parts of the engine, is radiated and conducted away by the stream of air, which is obtained from the atmosphere.
air cooling system
56
In order to have efficient cooling by means of air, providing _____ around the cylinder and cylinder head increases the contact area.
fins
56
The ______ direct the air close around the cylinders and prevent it from forming hot pools of stagnant air while the main streams rush by unused
baffles
57
______ and _______ are designed to force air over the cylinder cooling fins. .
Cowling and baffles
58
Some aircraft are fitted with _________ or _________ to enable the control of airflow through the engine.
cowl flaps or gills
58
are built into the baffles to direct jets of cooling air onto the rear spark plug elbows of each cylinder to prevent overheating of ignition leads.
Blast tubes
59
Helps the pilot in monitoring cylinder temperature to protect the engine from excessive heat.
CYLINDER HEAD TEMPERATURE GAUGE
60
The amount of heat carried off by the air-cooling depends upon the following factors:
- The total area of the fin surfaces, - The velocity and amount of the cooling air and, - The temperature of the fins and of the cooling air.
61
AIR COOLING SYSTEM ADVANTAGES
Simple design. It is lighter in weight than water-cooled engines due to the absence of water jackets, radiator, circulating pump, and the weight of the cooling water. It is cheaper to manufacture. It needs less care and maintenance. This system of cooling is particularly advantageous where there are extreme climatic conditions in the arctic or where there is scarcity of water as in deserts. No risk of damage from frost, such as cracking of cylinder jackets or radiator water tubes.
62
dissipates the heat generated in the engine by pumping a liquid through passages built into the cylinder and cylinder heads.
Liquid cooling system
63
Engine driven pump circulates the liquid through the engine.
WATER/LIQUID PUMP
64
Commonly a centrifugal type pump. It is usually driven by means of a belt. This type of pump consists of the following parts: body or casing, impeller or rotor, shaft, bearings or bush, liquid pump seal, and pulley.
WATER/LIQUID PUMP
65
Controls or monitors the coolant temperature. It is a kind of check valve which opens and closes with the effect of temperature. It is fitted in the liquid outlet of the engine.
THERMOSTAT VALVE
66
Acts as a reservoir for the coolant liquid.
HEADER TANK
66
allow the liquid to flow from the header tank to the engine block, and then from the engine to the radiator, and back to the header tank.
PIPES
67
Air flows through the ______ dissipating the heat from the coolant to the air. Its purpose is to cool down the water received from the engine.
Radiator
68
Radiator consists of three main parts:
upper tank, lower tank, and tubes.
69
There are three types of radiators:
gilled tube radiator, tubular radiator, and honey comb or cellular radiator.
70
Fan serves two purposes in the cooling system of an engine:
- Draws atmospheric air through the radiator to improve the cooling efficiency of hot water. - Directs fresh air over engine surfaces, removing heat and enhancing the overall cooling system efficiency.
70
is generally mounted on the water pump pulley, although on some engines, it is attached directly to the crankshaft.
FAN
71
In order to prevent the water in the cooling system from freezing, some chemical solution which are known as ________ are mixed with water.
anti-freeze solutions
72
commonly used antifreeze solutions:
Alcohol, denatured alcohol, glycerine, ethylene, glycol, propylene glycol, mixtures of alcohol and glycerine, and various mixtures of other chemicals
73
The boiling point of the anti-freeze solution should be as high as that of ______.
water
74
The ________ indicate an engine's cylinder arrangement and basic configuration.
first letters
75
The letters designate a ________ while the number denotes the __________ —often based on its displacement, which is the volume of an engine’s cylinders and an indicator of the engine’s size and power.
characteristic engine series
76
The _________ or __________ distinguishes the engine.
final letter or series further
77
O
Opposed, as in horizontally opposed cylinders
78
R
Radial engine
79
V
V-type engine
80
T
Turbocharged
81
I
Injected or fuel injected, instead of carbureted
81
TS
Twin turbocharged / turbo-supercharged
82
G
Geared nose section (propeller reduction gearing)
82
S
Supercharged
83
F
FADEC (Full Authority Digital Engine Control) equipped
84
H
Horizontal mounting (usually for helicopters)
84
L
Left-hand rotation or counter-rotating (for multi-engine installations)
85
V
Vertical mounting (for helicopters)
86
A
Inverted mount
87
The numbers in an engine identification code indicate an engine's piston displacement in ________.
cubic inches