Puricare Industrial Enterprises

Tuesday, March 9, 2021

AIRCRAFT BALANCING - Why Reducing Vibration Is More Important Than You Think - As of 2011, there were 224,475 estimated aviation craft active in the United States. With so many planes and helicopters in use, it’s important to understand field balance equipment and how to properly conduct propeller balancing. Vibration can be detrimental to every aspect of an aircraft. Control systems, instruments, avionics, and engine mounts can all be negatively affected by harsh vibration. If you’ve started to notice cracks in the spinner or cowling, your first step should be to conduct a vibration analysis at the propeller. While all propellers come balanced, this is only to ensure even weight distribution. Dynamic balancing works to measure vibrations while in operation. By following proper field balancing procedure and conducting this measurement you can help prevent potential damage and save time, as the whole process only takes a couple of hours. Balancing is conducted using specialized balance equipment, which is able to measure vibrations and identify where the imbalance is occurring. The balancing process starts by mounting an accelerometer onto the engine, while the optical tach is placed into a position where it can read (or “see”) each rotation of the propeller. A piece of reflective tape is placed on one of the blades to designate it as “blade one” in the process. Once hooked into the interface, users can enter details specific to the aircraft which will then be used when you print the final report.

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Aircraft Balancing

Why Reducing Vibration Is More Important Than You Think

by Steffan Kasula

ACES Systems

As of 2011, there were 224,475 estimated aviation craft active in the United States.

With so many planes and helicopters in use, it’s important to understand field balance equipment and how to properly conduct propeller balancing.

Monitor Vibrations

Vibration can be detrimental to every aspect of an aircraft.

Control systems, instruments, avionics, and engine mounts can all be negatively affected by harsh vibration.

If you’ve started to notice cracks in the spinner or cowling, your first step should be to conduct a vibration analysis at the propeller.

While all propellers come balanced, this is only to ensure even weight distribution.

Dynamic balancing works to measure vibrations while in operation.

By following proper field balancing procedure and conducting this measurement you can help prevent potential damage and save time, as the whole process only takes a couple of hours.

Balance Equipment

Balancing is conducted using specialized balance equipment, which is able to measure vibrations and identify where the imbalance is occurring.

The balancing process starts by mounting an accelerometer onto the engine, while the optical tach is placed into a position where it can read (or “see”) each rotation of the propeller.

For an accurate reading, a piece of reflective tape is placed on one of the blades to designate it as “blade one” in the process.

Once hooked into the interface, users can enter details specific to the aircraft which will then be used when you print the final report.

After the aircraft is brought to full power and everything has stabilized, the reading will begin.

Typically, an analysis will be done in around seven seconds, after which the engine is shut down and the process of balancing begins.

The balancing equipment should produce a readout of the vibration magnitude and the angle of the imbalance.

This information can also be used to create a solution that can help rectify the imbalance and reduce the vibration.

Depending on the circumstances, the solution can be as simple as adding weight to either the flywheel or prop spinner.

The system can recommend where to allocate the weight and distribute it without the need for new screws or bolts.

However, in most cases, weight is added by the addition of nuts, screws, and washers. Once the entire process is over, remove the reflective tape to help prevent corrosion.

Utilizing proper balance equipment is the first and best step towards making sure your propeller runs as it should.

It’s important to note that any system changes will require rebalancing if a repair or routine maintenance is conducted, the prop is removed, or any change as occurred in the engine.

If you’ve never conducted a balanced analysis before, you’ll be amazed at the difference it can make and the amount of vibration that can be reduced.

Overall. this not only makes your aircraft safer but much more comfortable to fly.

About ACES Systems

TEC Headquarters Building

The Technology for Energy Corp. Headquarters in Knoxville, Tenn. houses ACES Systems, Powermetrix, TEC Materials Testing and Nuclear Products divisions.

The parent company of ACES Systems, Technology for Energy Corporation (TEC-USA), provides simple solutions to complex problems for several critical industries: nuclear power, materials testing, electric power, and aviation.

ACES Systems, a small aviation business purchased in 1990, has become a standard in the aviation industry for providing vibration analysis, balancing, engine performance analysis, and inlet guide vane adjustment systems to customers worldwide.

ACES kits and analyzers combine cutting-edge engineering and manufacturing. For that, they are valued by aviation teams all over the world. Our commercial off-the-shelf (COTS) and military spec test kits are fast, accurate, and user-friendly. Over 1,000 ACES units are used today by the U.S. Navy and Marine Corps, with another 4,500 kits installed internationally. That’s because our products allow maintenance crews and technicians to get clear-cut data at striking speeds. We deliver unbeatable capability with precise insight into aircraft systems performance and repair needs.

https://www.acessystems.com/aircraft-balancing-why-reducing-vibration-is-more-important-than-you-think/

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Monday, March 8, 2021

BAROMETRIC PRESSURE - Barometric pressure is the weight of the overlying air pressing down on the earth. It is also known as air pressure. Low barometric pressure means the overlying air is rising, whereas high pressure means the overlying air is sinking. Barometric pressure has important effects on water chemistry and weather conditions. It affects the amount of gas that can dissolve in water. More gas, such as oxygen, can dissolve in water under higher pressure when compared to lower air pressure. For instance, more oxygen is dissolved in water at sea level than at high altitudes. The pressure of the overlying air forces more gas into solution. As the overlying pressure decreases, gas is released from solution. A common example of this is when someone opens a carbonated beverage. High barometric pressure supports sunny, clear, and favorable weather conditions, but lower levels promotes rainy and cloudy weather conditions. This atmospheric parameter has been used for hundreds of years to forecast weather conditions. Differences in barometric pressure over large inland lakes can produce seiches, which affect water levels in the lake and adjoining estuaries. Millibars are a more direct measure of barometric pressure and are the units used in SWMP. Traditionally, a barometer was used for measuring barometric pressure. SWMP uses a more modern and accurate device called a capacitative pressure sensor.

Barometric Pressure

What is Barometric Pressure?

By Fondriest Staff

Barometric pressure is the weight of the overlying air pressing down on the earth.

It is also known as air pressure.

Low barometric pressure means the overlying air is rising, whereas high pressure means the overlying air is sinking.

Why is Barometric Pressure Important?

Barometric pressure has important effects on water chemistry and weather conditions.

It affects the amount of gas that can dissolve in water. More gas, such as oxygen, can dissolve in water under higher pressure when compared to lower air pressure.

For instance, more oxygen is dissolved in water at sea level than at high altitudes.

The pressure of the overlying air forces more gas into solution.

As the overlying pressure decreases, gas is released from solution. A common example of this is when someone opens a carbonated beverage.

High barometric pressure supports sunny, clear, and favorable weather conditions, but lower levels promotes rainy and cloudy weather conditions.

This atmospheric parameter has been used for hundreds of years to forecast weather conditions.

Differences in barometric pressure over large inland lakes can produce seiches, which affect water levels in the lake and adjoining estuaries.

How is Barometric Pressure measured?

Barometric pressure is typically reported in inches of mercury or in millibars. 1 inch of mercury equals about 33.9 millibars,

Inches of mercury is the traditional way of reporting air pressure. Greater air pressure pushes a column of mercury higher in a barometer.

Millibars are a more direct measure of barometric pressure and are the units used in SWMP.

Barometric Pressure Technology

Traditionally, a barometer was used for measuring barometric pressure.

SWMP uses a more modern and accurate device called a capacitative pressure sensor.

The barometer was first devised in 1644. It consists of a glass tube that is closed at one end and open at the other.

The tube sits vertically, with the open end sitting in a pool of mercury.

Changes in pressure will change the level of mercury in the tube.

Increased air pressure pushes the mercury higher into the tube, whereas decreased air pressure allows the mercury in the tube to drop.

https://www.fondriest.com/news/barometricpressure.htm

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Monday, March 1, 2021

INFINITY POOLS - Everything You Need to Know About Infinity Pools – Infinity pools make you feel as if you are one with the horizon, floating above the landscape, luxuriating in sky, and finally understanding how it feels to be a bird. An infinity pool, also known as a zero edge pool, looks like it disappears into the horizon. An infinity pool is designed to play a visual trick on the eye, making you think that there is no separation between the water and surrounding landscape features. There’s a lot of debate about the historical precedents for today’s infinity swimming pools. In earlier centuries, recirculating fountains with water spilling over the edge into basins were precursors to infinity pools. To understand how an infinity pool’s design works, imagine a waterfall. You see water go over the edge of a waterfall and — disappear into thin air. What really happens, of course, is that the water flows down to a lower level and (depending on how steep a waterfall’s slope is) is captured in a lower pool, which then overflows again as more volume cascades down from the top. An infinity pool is sort of like a waterfall with a single lower level — one section of the pool’s edge is lower, acting like a dam which overflows into a lower catch basin. From there, water is pumped back into the upper pool to create a continuous overflow. An infinity pool’s edge is like the edge of any swimming pool, except that there’s a dip in one section of it to allow water to flow over, into a lower catchment basin.

Infinity Pools

Everything You Need to Know About Infinity Pools

Michelle Slatalla

From here to infinity is the view you get in a swimming pool with a vanishing edge.

Infinity pools make you feel as if you are one with the horizon, floating above the landscape, luxuriating in sky, and finally understanding how it feels to be a bird.

So…exactly how do infinity pool designers accomplish the disappearing act?

So many questions. If you’re adding a backyard pool, should you ask for a wildly Instagrammable #infinitypool design?

Or will today’s design darlings go the way of the kidney-shaped pool of yesteryear? How much do infinity pools cost, anyway?

Read on for everything you need to know about infinity swimming pools.

1. What is an infinity pool?

Above: An infinity swimming pool with a panoramic view creates
romance in Italy (as if Italy needs more romance).

An infinity pool, also known as a zero edge pool, looks like it disappears into the horizon.

An infinity pool is designed to play a visual trick on the eye, making you think that there is no separation between the water and surrounding landscape features.

2. Who invented infinity pools?

Above: In a garden designed by Edmund Hollander, a modern-Gatsby
infinity pool extends to the horizon and has an unobstrusive coping edge.

There’s a lot of debate about the historical precedents for today’s infinity swimming pools.

In earlier centuries, recirculating fountains with water spilling over the edge into basins were precursors to infinity pools.

In the US, modernist architect John Lautner began building swimming pools with a vanishing edge in southern California in the mid 20th century.

One of his famous early designs, at the Silvertop home commissioned by industrialist Kenneth Reiner, was “a cantilevered swimming pool that seems to flow directly into Silver Lake Reservoir far below,” notes the LA Conservancy.

Today a “Lautner knife-edge design” refers to an infinity pool where water flows outward to the edge of the pool at deck level and overflows into a slot at the edge.

The treatment of the coping distinguishes a Lautner knife-edge pool from an infinity pool with submerged coping where “you look down and see wet decking or coping material at the edge of the pool,” writes Brian Van Bower in Pool Spa News.

“But when you approach a knife-edge perimeter-overflow pool, you look down inside the pool to the full depth of water and your feet remain dry. It’s a genuinely cool detail that creates a certain ‘wow’ factor, because it mystifies, intrigues and delights those who know nothing about how these systems are made.”

3. How do infinity pools work?

Above: A 10th-Century Castle Swimming Pool of the Week:
A Modern Infinity Pool for a Medieval Castle

To understand how an infinity pool’s design works, imagine a waterfall. You see water go over the edge of a waterfall and — disappear into thin air.

What really happens, of course, is that the water flows down to a lower level and (depending on how steep a waterfall’s slope is) is captured in a lower pool, which then overflows again as more volume cascades down from the top.

An infinity pool is sort of like a waterfall with a single lower level — one section of the pool’s edge is lower, acting like a dam which overflows into a lower catch basin.

From there, water is pumped back into the upper pool to create a continuous overflow.

4. What is an infinity pool edge?

Above: A swimming pool at a Napa Hills estate, by Scott Lewis
Landscape Architecture. See more in Ask the Expert:
An Insider’s Guide to Swimming Pool Design from Scott Lewis.

An infinity pool’s edge is like the edge of any swimming pool, except that there’s a dip in one section of it to allow water to flow over, into a lower catchment basin.

To create the disappearing-edge illusion, infinity pools are designed without a visible cap: at the deck level, there’s nothing — coping, pavers, or decking — to call attention to the edge.

5. What sites are best for infinity pools?

Above: A landscape by designer Ive Haugeland with “awe-inspiring views of the
Pacific Ocean” in Sausalito, California has an infinity pool sited on a steep hillside.

“An infinity-edge pool needs an appropriate setting,” says San Francisco-based landscape architect Scott Lewis.

While it can be a striking design element, this type of pool works best on a site with a significant drop-off, he says.

6. What is the world’s best-known infinity pool?

Above: At the Marina Bay Sands in Singapore, a rooftop
swimming pool is 57 floors above street level and has a panoramic city view.

The most famous infinity pool in the world? That would be the cantilevered pool on the rooftop at the Marina Bay Sands hotel in Singapore.

People travel from around the world to swim in it or to take photos of it. The views of the city are dizzying. Check them out on Instagram: #marinabaysandspool.

7. How much does a typical infinity pool cost?

Above: Infinity pool as Mediterranean muse. For more see Landscape Architect
Visit: Thomas Doxiadis on Antiparos. Photograph by Clive Nichols.

The catchment and recirculation systems in an infinity pool add a degree of difficulty — and expense — beyond a basic swimming pool.

To prevent pool water from flowing in the wrong direction, you also need a vacuum basin, plus a special filtration system to remove leaves, bugs, and other debris from the pool’s edge.

Pool designers estimate that a vanishing edge will add 30 percent to the cost of any in-ground pool. And that’s for one disappearing edge.

Some infinity pools are designed to allow water to overflow on more than one side of the perimeter, which adds to the cost.

The average cost of an infinity pool? $79,000, estimates Home Advisor, with an average range from $55,000 to $130,000.( The base cost per square foot is about $80.)

8. Are infinity pools safe?

Above: A pool with an infinity edge; Lewis sited it to take
advantage of a dramatic view. Photograph by John Sutton.

Yes, infinity pools are safe. Remember, the disappearing edge is a visual trick, not an actual disappearing edge.

If you swim up to the edge of the pool, you’ll reach a wall. (At the Marina Bay Sands hotel’s infinity pool 57 stories above street level in Singapore, “Contrary to what I thought prior to visiting, the pool does not just completely drop off into nothing as it appears to,” writes The Wander Blogger.

“A few feet beneath the edge of the infinity pool is another platform, so were you to somehow flip over the edge of the pool, that’s where you’d land. But if you then fell off that second ledge, you’d be pretty well screwed, so security makes sure no monkey business goes on at the pool’s edge. Even lifting yourself up to look over the edge will get a whistle blown at you.”)

9. Do infinity pools require additional maintenance?

Above: Residents of this serene home by Deborah Berke Partners
can choose between their infinity pool or the ocean when they’re ready
to take a dip. For more from NYC-based Berke, see Architect Visit:
Deborah Berke and Suzanne Shaker in Shelter Island.

Residents of this serene home by Deborah Berke Partners can choose between their infinity pool or the ocean when they’re ready to take a dip.

Infinity pool technology is more complicated than old-fashioned pool technology, so expect more maintenance requirements as well.

The water catchment basin is an additional area to clean, for one thing.

The filtration and water pump need to be monitored; if one gets clogged or the other breaks down, there will be no effective recirculation.

And finally, as water flows over the edge of the pool and into a lower basin, it will evaporate faster than in a typical swimming pool.

Michelle Slatalla

New Orleans gardens look like no others in the world, thanks to the city's particular climate, geography and architectural style—not to mention swamplands, floods, hurricanes, deposits of rich alluvial soil, and pestilential insects. Steal these 10 garden ideas from New Orleans for your own garden:

We launched Gardenista in 2012 as the definitive guide to stylish outdoor spaces. Since then, we've been finding the best design ideas, from fragrant old French roses to midcentury house numbers. Whether your outdoor space is a city balcony or a sprawling garden, it's yours to personalize and we're here to help.

We’re a team of garden obsessives with a mission to demystify outdoor design. When it comes to a well-loved and well lived-in landscape, the best advice comes from like-minded friends.

https://www.gardenista.com/posts/everything-need-know-infinity-pools-design-guide/

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