Catapult+Workshop

=Catapults: Bulldogs vs Athenians=

and lay siege to the soccer field.
=The Mission: Bigger, Better, Further, Faster - SPLAT!= = **Session 1:** =
 * [[image:P1260973.JPG]]

Think **BIG** but get the science right...
||

Explore real machines to trigger some ideas...
||
 * [[image:P1260977.JPG]]

A Bulldog-Brainstorm to develop a design ...
||

... turning thinking into sketches ...
||
 * [[image:P1260982.JPG]]

... a bit of advice to make sure it will work...
||

Athenians in discussion about their trebuchet idea...
||
 * [[image:P1260979.JPG width="328" height="244"]]

arm ...
||

Athenians at the top; Bulldogs, down below.
||

Session 2: Construction begins...

 * [[image:P1270079.JPG]]

Discussing the construction...
||

... the trebuchet idea...
||
 * [[image:P1270070.JPG]]

The wood arrives...
|| ==== ====

Measuring out an exploded version of the plan...
||
 * ====[[image:P1270067-1.JPG]]====

Chalking out the template...
||

Explaining the notching technique...
||
 * [[image:P1270091.JPG width="324" height="222"]]

Laying out the timber...
||

Notching the joins...
||
 * [[image:P1270087.JPG width="325" height="226"]]

Hammering in the nails...
|| ||
 * [[image:P1270094.JPG width="328" height="194"]]

The Bulldogs' catapult frame...
||

The Athenians' trebuchet frame...
||

**Session 3: Erecting the frame...**

 * == The Bulldogs' Catapult == || == The Athenians' Trebuchet == ||
 * [[image:P1270104.JPG]]

Bracing the side bars...
||

Bracing the base...
||
 * [[image:P1270105.JPG]]

Measuring the gap...
||

Stabilizing the uprights...
||
 * [[image:P1270111.JPG]]

Bracing the base
||

Drilling holes for the pivot bar...
||
 * [[image:P1270119.JPG]]

Lashing with twine... hmmm ... let's try rope...
||

Hacksawing the pivot bar...
||
 * [[image:P1270134.JPG]]

The catapult frame...
||

The trebuchet frame... ( flag pole at the rear)
||