Pulley System facts

While investigating facts about Pulley System Calculations and Pulley System Physics, I found out little known, but curios details like:

In 2008, Anthony Curcio robbed a Brinks armoured car outside of a Bank of America branch, escaped across a hand-dredged creek behind the bank in an inner tube on a pulley system while 15-20 decoys he had hired dressed exactly the same as him covered his escape.

how pulley systems work?

Leonardo da Vinci created plans for a "mechanized knight," - a robot-like creation reliant on a system of pulleys. When these plans were found almost 500 years later and built according to Leonardo's specifications, the design worked perfectly.

In this pulley system what force must be applied?

In my opinion, it is useful to put together a list of the most interesting details from trusted sources that I've come across answering what is the mechanical advantage of a pulley system. Here are 13 of the best facts about Pulley System Design and Pulley System Examples I managed to collect.

what is the ima of the following pulley system?

1. Dr. Thomas Midgely, inventor of both leaded-gasoline and chlorofluorocarbon with the best of intentions, devised an ingenious system of pulleys and strings to pull his polio-stricken body out of bed, which tangled around his neck, and killed him.

2. The length of a music single was determined by the weight-driven pulley system on a 1920's recording machine called the Scully Lathe. The pulley allowed approximately three and a half minutes to record before a 100lb weight hit the floor, thus determining the length of a single to this day.

3. Thomas Midgley who invented Ethyl, the lead-based additive to gasoline, also invented chlorofluorocarbons, which just about destroyed the ozone layer. He got polio, invented a wire-and-pulley system to get himself out of bed, and then ended up being strangled by it.

4. They experimented with wing-warping using a system of ropes and pulleys controlled by the pilot and in July 1899 tested their new design on a biplane kite.

5. The man who introduced lead to gasoline to reduce engine knocking also introduced the use of CFCs as a refrigerant. He later contracted polio and invented a system of pulleys to move himself, which he suffocated himself with by accident.

6. The same person invented Leaded Gas, Freon, and aerosol propellent, and was strangled in the pulley system he built to help with his Polio.

7. Thomas Midgley Jr, the scientist who both introduced the use of lead in gasoline and CFCs in refrigeration systems, died when he entangled himself in an elaborate system of pulleys and ropes he designed to help others lift him from bed after he contracted polio.

8. Birds use a 'pulley system of tendons' to mechanically lock their claws/foot around objects. This is why they can be perched on one leg only while sleeping, and also how some species of predatory birds are able to kill/hold their prey mid-air.

9. Birds have an internal pulley system which works as an auto-perch mechanism.

Why 2 pulley system?

You can easily fact check why is a block and tackle pulley system by examining the linked well-known sources.

Birds have an internal pulley system which auto-perches them when their legs bend. It probably helps them sleep without falling off their perch.