Pr2cv said:
Before that, Active Volcanoes
Australian History
- Thread starter the duck
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Before that, Active Volcanoes
lol Correct and only 10000 years ago they erupted and spilled lava across the south australian border and all the way to the yarra
Your go pr2cv
Your go pr2cv
Middle percy island
Hey duck,
I thought everyone had given me the flick !
The original leasehold was held by Andrew Martin an Englishman who raised goats on the island.He returned to the UK.
He sold the leasehold to a couple for $30k to a couple who sold goat stew ,fresh goat meat,
Vegetables & hand crafts to visiting yachtsmen.
A court case ensued instigated by relatives of Andy where the verdict was in their favour,the case being that the property was sold under valued by $300.000.nted in
A beautiful island was commented on by Mathew Flinders RN.
There is a hut on the beach where the names of every yacht is screwed to anywhere the plaque will fit.
Our boat is up there some where.
There is a move to declare it a national park ,cull the goats ,knock down the hut,& lock up another part of Austrailia
I thought everyone had given me the flick !
The original leasehold was held by Andrew Martin an Englishman who raised goats on the island.He returned to the UK.
He sold the leasehold to a couple for $30k to a couple who sold goat stew ,fresh goat meat,
Vegetables & hand crafts to visiting yachtsmen.
A court case ensued instigated by relatives of Andy where the verdict was in their favour,the case being that the property was sold under valued by $300.000.nted in
A beautiful island was commented on by Mathew Flinders RN.
There is a hut on the beach where the names of every yacht is screwed to anywhere the plaque will fit.
Our boat is up there some where.
There is a move to declare it a national park ,cull the goats ,knock down the hut,& lock up another part of Austrailia
typical it took me a while to find it was a good one
Which australian developed a new item so ships could use larger propellors and is the standard today for ships and turbines
Which australian developed a new item so ships could use larger propellors and is the standard today for ships and turbines
A Rice nozzle which is a shrouded propellor design.
Increases Bollard pull,better fuel efficiency ,better low speed maneuverability
Used on tugs & low speed vessels where shaft power is needed.
Appears to be not effective at speeds above 10 kts
Increases Bollard pull,better fuel efficiency ,better low speed maneuverability
Used on tugs & low speed vessels where shaft power is needed.
Appears to be not effective at speeds above 10 kts
no not the rice nozzle
no not orbital engine it has to to with a type of seal
A seal developed by BruceRoberts Naval architects called a Manecraft deep sea seal
Where one side of the seal rotates with the propellor Shaft assy & the other being fixed,
It can be fitted to propulsion shafts from 1 inch to 6 feet
Where one side of the seal rotates with the propellor Shaft assy & the other being fixed,
It can be fitted to propulsion shafts from 1 inch to 6 feet
Nearly this is a hard one but ill pay prs answer the answer i was after was
1907 Michell thrust block bearing Fluid-film thrust bearings were invented by Australian engineer George Michell. Michell bearings contain a number of sector-shaped pads, arranged in a circle around the shaft, and that are free to tilt. These create wedge-shaped regions of oil inside the bearing between the pads and a rotating disk, which support the applied thrust and eliminate metal-on-metal contact. The small size (one-tenth the size of old bearing designs), low friction and long life of Michell's invention made possible the development of larger propellers and engines in ships. They were used extensively in ships built during World War I, and have become the standard bearing used on turbine shafts in ships and power plants worldwide
1907 Michell thrust block bearing Fluid-film thrust bearings were invented by Australian engineer George Michell. Michell bearings contain a number of sector-shaped pads, arranged in a circle around the shaft, and that are free to tilt. These create wedge-shaped regions of oil inside the bearing between the pads and a rotating disk, which support the applied thrust and eliminate metal-on-metal contact. The small size (one-tenth the size of old bearing designs), low friction and long life of Michell's invention made possible the development of larger propellers and engines in ships. They were used extensively in ships built during World War I, and have become the standard bearing used on turbine shafts in ships and power plants worldwide
the duck said:
Australians are great innovators.
Another great unsung ledgend.
The first tilting pad bearing in service was probably built under A.G.M. Michell's guidance by George Weymoth (Pty) Ltd, for a centrifugal pump at Cohuna on the Murray River, Victoria, Australia, in 1907, just two years after Michell had published and patented his three-dimensional solution to Reynold's equation. By 1913, the great merits of the tilting-pad bearing had been recognised for marine applications. The first English ship to be fitted out with the bearing was the cross-channel steamboat the Paris, but many naval vessels were similarly equipped during the First World War. The practical results were spectacular the troublesome thrust block became dramatically smaller and lighter, significantly more efficient, and remarkably free from maintenance troubles. It was estimated that the Royal Navy saved coal to a value of 500,000 in 1918 alone as a result of fitting Michell's tilting-pad bearings.
According to the ASME (see reference link), the first Michell/Kingsbury fluid bearing in the USA was installed in the Holtwood Hydroelectric Power Plant (on the Susquehanna River, near Lancaster, Pennsylvania, USA) in 1912. The 2.25-tonne bearing supports a water turbine and electric generator with a rotating mass of about 165 tonnes and water turbine pressure adding another 40 tonnes. The bearing has been in nearly continuous service since 1912, with no parts replaced. The ASME reported it was still in service as of 2000. As of 2002, the manufacturer estimated the bearings at Holtwood should have a maintenance-free life of about 1,300 years.
They were steel or stainless i think
According to the ASME (see reference link), the first Michell/Kingsbury fluid bearing in the USA was installed in the Holtwood Hydroelectric Power Plant (on the Susquehanna River, near Lancaster, Pennsylvania, USA) in 1912. The 2.25-tonne bearing supports a water turbine and electric generator with a rotating mass of about 165 tonnes and water turbine pressure adding another 40 tonnes. The bearing has been in nearly continuous service since 1912, with no parts replaced. The ASME reported it was still in service as of 2000. As of 2002, the manufacturer estimated the bearings at Holtwood should have a maintenance-free life of about 1,300 years.
They were steel or stainless i think
How about Lignum Vitae the worlds hardest wood from Central America .?
I think you will find that this was the actual bearing surface,water lubricated!!
Hard to believe , & it lasted for years before wearing out & needing replacement.
This wood was used universally for shaft bearings in Ships
Pete Seeger had a Banjo with a Lignum Vitae fret board.
More Trivia,!!
I think you will find that this was the actual bearing surface,water lubricated!!
Hard to believe , & it lasted for years before wearing out & needing replacement.
This wood was used universally for shaft bearings in Ships
Pete Seeger had a Banjo with a Lignum Vitae fret board.
More Trivia,!!
Your go pr2cv ask away
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