inventions

[|brainstorm]

Inventor’s History Sheet

Inventor’s Name:Bill gallagher

Date of Birth: 2:32 PM Tue Aug 10 1990

Date of Death: Jul 25, 2009 01:30 PM Describe the inventor’s early life and education.

Bill plays as active role as Gallaghers' CEO and travels the world on regular basis - holding seminars, training sessions and field days on many topics, including the containment of animals, security of property and people, agri-business, tariff removals and export issues.

What did this inventor invent? Describe how the inventor came up with his/her idea. Describe what their invention does. The electric fence was his first invention because he wanted to keep a horse from recking his car What did this inventor invent? Describe how the inventor came up with his/her idea. A way of keeping the farm animals in there paddock

Tell about any other important information or interesting facts about this inventor. He is a new zelander

KKPS – rm 25

Inventor’s History Sheet

Inventor’s Name:Bill Hamilton Date of Birth: 26th July 1899 Date of Death:** Sunday 18 June 2000) ** Describe the inventor’s early life and education. What did this inventor invent? Describe how the inventor came up with his/her idea. the jet boat
 * Bill Hamilton**, was a [|New Zealander] who developed the modern [|jetboat], and founder of what is now the world's leading water jet manufacturing company

Describe what their invention does. A **jetboat** is a [|boat] propelled by a jet of water ejected from the back of the craft. Unlike a [|powerboat] or [|motorboat] that uses a [|propeller] in the water below or behind the boat, a jetboat draws the water from under the boat into a [|pump] inside the boat, then expels it through a nozzle at the [|stern]. Jetboats were originally designed by [|Sir William Hamilton] (who developed a waterjet in 1954) for operation in the fast-flowing and shallow rivers of [|New Zealand], specifically to overcome the problem of propellers striking rocks in such waters. Previous attempts at waterjet propulsion had very short lifetimes, generally due to the inefficient design of the units and the fact that they offered few advantages over conventional propellers. Unlike these previous waterjet developments, such as [|Campini's] and the Hanley Hydrojet, Hamilton had a specific need for a propulsion system to operate in very shallow water, and the waterjet proved to be the ideal solution. From this the popularity of the jet unit and jetboat increased rapidly, and through further developments it was found the waterjet offered several other advantages over propellers for a wide range of vessel types, and as such waterjets are used widely today for many high speed vessels including passenger ferries, rescue craft, patrol boats and offshore supply vessels. Jet boats are highly maneuverable, and many can, from full speed, be reversed and brought to a stop within little more than their own length, in a maneuver known as a "crash stop". The well known //Hamilton turn// or "jet spin" is a high speed manoevre where the boat's engine throttle is cut, the steering is turned sharply and the throttle opened again causing the boat to spin quickly around with a large spray of water. There is no engineering limit to the size of jet boats, though the validity of their use depends a lot on the type of application. Classic prop-drives are generally more efficient and economical at low speeds (up to about 20 knots) but as boat speed increases beyond this the extra hull resistance generated by struts, rudders, shafts etc means waterjets are more efficient in the 20-50 knot range. Also, in situations where you need very large propellers turning at slow speeds (such as tug boats) the equivalent size waterjet would be simply too big to be practical. For these reasons the vast majority of waterjet units are installed in high speed vessels and in particular situations where shallow draught, maneuverability and load flexibility are main concerns. The biggest jet-driven vessels are found in military use or the high speed passenger/car ferry industry. South Africa's [|Valour class frigates] (approximately 120m long) are the biggest jet-propelled vessels so far. Even these German-built vessels are capable of performing "crash stops".

KKPS – Room 25

Inventor’s History Sheet

Inventor’s Name: John Britten Date of Birth: 1 augest 1950 Date of Death: 5 december 1997 Describe the inventor’s early life and education. Britten completed a four-year mechanical engineering course at night school before joining ICI as a cadet [|draughtsman], giving him a wide range of work experience including mould design, pattern design, metal spinning and various mechanical engineering designs.

What did this inventor invent? Describe how the inventor came up with his/her idea. John Britten emerged in recunrecognised in its formativent years as the most original thinker in motorcycle engineering. His talent went e years, since New Zealand was seen as a source of fine riders, TT winners among them, but not of motorcycles. But Britten changed all that. Frustrated that available machines would not perform reliably to his high racing standards, he drew up his own design in the late Eighties and set about building and developing it. It was a personal campaign to prove that the small man could do better than the established industry giants through single-minded devotion; in the same way, he cast the door handles he wanted for his house. Britten's garage, … Describe what their invention does.

Motorcycles question: When did **John Britten** finish building his Britten V1000? He never really finished it; the V1000 was a constant evoluting design Tell about any other important information or interesting facts about this inventor.

KKPS – Room 25 BILL HAMILLTON

What did this inventor invent? Describe how the inventor came up with his/her idea. the jet boat
 * Bill Hamilton**, was a [|New Zealander] who developed the modern [|jetboat], and founder of what is now the world's leading water jet manufacturing company

A **jetboat** is a [|boat] propelled by a jet of water ejected from the back of the craft. Unlike a [|powerboat] or [|motorboat] that uses a [|propeller] in the water below or behind the boat, a jetboat draws the water from under the boat into a [|pump] inside the boat, then expels it through a nozzle at the [|stern]. Jetboats were originally designed by [|Sir William Hamilton] (who developed a waterjet in 1954) for operation in the fast-flowing and shallow rivers of [|New Zealand], specifically to overcome the problem of propellers striking rocks in such waters.