Definition a machine that converts energy into mechanical motion or energy” Comes from the Greek word “Katapultos,” meaning “ ” aka: Engine or Siege The Invention



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Catapults- Physics, Background & History
Definition

A machine that converts ENERGY into mechanical

motion or ENERGY”

Comes from the Greek word “Katapultos,” meaning “

AKA: Engine or Siege
The Invention

The catapult, as we would recognize it today, was invented by the

about 399 BC but various forms were found in central Asia

During the war with Carthage, Dionysius of Syracuse produced the Gastraphetes or

“belly bow” catapult
By 330 BC two distinct types of emerged

One fired javelins ( ) called a Euthytonon

The other was the throwing Palintonon
How was it used in medieval times?

First we need to understand the Middle Ages society

was rampant

There was huge disparity between the rich and




were constructed to protect nobles (and peasants during

crisis)


Castle construction



Draw

Portcullis


Guard

Murder holes



What is this?

Catapult AKA: Siege Machine or Siege Engine

What is a siege?


O

ne army an enemy, keeping help, goods and water from leaving or entering the castle

Medieval warfare


Infantry (usually the poor)

Archers (trained/ paid military)

Battering

Psychological warfare

Flaming shrubbery and brush

Dead, diseased bodies


of tortured victims

C
What is this?
atapult Structure & Design


A typical catapult has each of the following:

Arm

Base

Force


Fulcrum
Most catapults were made of
The force provided by twisted rope, springs, saplings
The fulcrum is the point of support for a lever- which in the case of a catapult is the arm

Factors Affecting Distance

of object being hurled

Strength & flexibility of the

of the arm

of the arm


How far the arm is back

Angle of or release (best angle?)

Small transfer of into distortion





Types of Catapults


Roman design and others found during the

medieval period



Ballista

Roman

armed –

l
What is this?
ike a bow


Shot large or

j


avelins
Mangonel or Onager

French

“Engine of War”


Typical

T
What is this?
rebuchet

Used a sling with the arm

Extremely accurate


Most advanced of all catapults





Types of Trebuchets:

Counterweight Trebuchet



or

Hinged Counterweight Trebuchet



What kind of trebuchet is this?


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