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long but true and funny?

Jan 11, 2007 by | Posted in Jokes & Riddles

1. If being chased through town, you can usually take cover in a passing St Patrick's Day parade - at any time of the year.

2. All beds have special L-shaped top sheets that reach up to armpit level on a woman but only waist level on the

This is "Things That Movies Have Taught Us"

dcp | Jan 11, 2007

NOVA Medieval Siege Excerpts Part 1

Excerpt from Nova Secrets of Lost Empires 2. Medieval Siege. Trebuchet. Great examples of simple machines -- esp. lever and pulleys.

medieval pulley systems - Bookshelf


The Medieval City Under Siege
302 pages 		The Medieval City Under Siege

Creator: Ivy A. Corfis, Michael Wolfe | History - 2000-11-01
A similar type of pulley system, using two opposing cranks with handles, was used on medieval crossbows (Payne-Gallwey, pp. 120-25; Harmuth, pp. 108-10). ...
Publisher: Boydell & Brewer Inc
Britain's medieval castles
218 pages 		Britain's medieval castles

Creator: Lise Hull | Architecture - 2006
Guards used windlasses to power the pulley system. "Pivoting" bridges also required pulleys to haul them into place. Used increasingly from the late ...
Publisher: Praeger Pub Text
Complex problem solving, principles and mechanisms
415 pages 		Complex problem solving, principles and mechanisms

Creator: Robert J. Sternberg, Peter A. Frensch | Education - 1991
These systems would not be of much use to a medieval construction contractor, ... realize that his apprentices needed to practice with real pulleys. ...
Publisher: Lawrence Erlbaum
Envisaging heaven in the Middle ages
258 pages 		Envisaging heaven in the Middle ages

Creator: Carolyn Muessig, Ad Putter | Religion - 2007
The pulley-system is invisible [. . .] When he approaches the ... Medieval workmen were familiar, for example, with the dangers of raising heavy weights, ...
Publisher: Taylor & Francis

Digg Headlines

(95 diggs) The Great Chinese iPad Zipline Smuggling Ring
Aug 08, 2011 from adeelarshad82(Adeel Arshad) in World News
adeelarshad82 You've got to admire the audacity of the Chinese hucksters who were illegally importing iPads and iPhones across the border from Hong Kong, by way of a rope-and-pulley system, triggered by a crossbow and desire to make some cash.
(1 diggs) Plastic pulley ball bearings
Dec 29, 2010 from npyvonne in Business
npyvonne Plastic pulley ball bearingsused in home appliance P4 and P5low noise high speed
Plastic pulley ball bearings


1) Material: GCR15 or Stainless steel( option by customers if carbon steel)2) Used for bearing radial and xial loads and certain thrust loads3) Low operating friction and high limit speed;4) Higher rotating accuracy and low vibration level5) Modifiable as a sealed bearing or open type are available
Established in 1988, Ningbo CIE Corporation is a comprehensive enterprise specializing...
(1 diggs) Study Physics: System of pulleys
Nov 05, 2010 from studyphysics(Study Physics) in Science
studyphysics Study Online :: Study Physics: System of pulleys
(1 diggs) Pulley alignment System view file
Nov 26, 2010 from shintaw(Shinta Widyaningsih) in Business
shintaw Perfect tool for sheave and pulley alignment. Laser line projected onto target allows you to quickly ascer Measures distances form 6" to 20' Measures pulley diameters 3" and larger swf format /view/13_keyword-pully-alingment/pulley-alignment-system.pdf [...]
(128 diggs) Designers Create a "More Efficient" Chainless Bike
Sep 23, 2010 from TreeHugger(TreeHugger ) in Science
TreeHugger Photo via StringBike

The Bike, Unchained
A group of designers in Hungary have done away with what has long been a staple of bicycle design, those oily old chains, with their creation, the StringBike. Instead of being propelled forward the traditional way, this novel new bike utilizes a clever symmetrical rope and pulley system that may make cycling safer, smoother, and more efficient -- and it just may be the way everyone pedals around in the future.... Read the full story on TreeHugger