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# Panofsky brier wind velocity

Approximate the storm central pressure if the velocity of winds at low pressure area is more or less 35 knots by using the formula developed by Brier and Panofsky?

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I have solved some Panofsky and Brier problems in my blog "Deck Officer Review Questions". Here's the link

Posted on Dec 29, 2013

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Posted on Jan 02, 2017

Rab.c= [Rab - (Rac * Rbc)]/[(1 - (Rac^2))(1 - Rbc^2)]^0.5

Posted on Sep 03, 2011

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## Related Questions:

### Definition of low pressure system

Standing on the ground and looking up, you are looking through the atmosphere. It might not look like anything is there, especially if there are no clouds in the sky. But what you don't see is air - lots of it. We live at the bottom of the atmosphere and the weight of all the air above us is called air pressure. A tower of air that is 1 inch square and goes from the bottom of the atmosphere is 14.7 pounds. That means air exerts 14.7 pounds per square inch (psi) of pressure at the Earth's surface. High in the atmosphere, air pressure decreases. With less air molecules above, there is less pressure from the weight of air above.
Pressure varies from day-to-day at the Earth's surface - the bottom of the atmosphere. This is, in part, because the Earth is not equally heated by the Sun. Areas where air is warmed often have lower pressure because the warm air rises and are called low pressure systems. Places where air pressure is high are called high pressure systems.
A low pressure system has lower pressure at its center than the areas around it. Winds blow towards the low pressure, and the air rises in the atmosphere where they meet. As the air rises, the water vapor within it condenses forming clouds and often precipitation too. Because of Earth's spin and the Coriolis Effect, winds of a low pressure system swirl counterclockwise north of the equator and clockwise south of the equator. This is called cyclonic flow. On weather maps a low pressure system is labeled with red L.
A high pressure system has higher pressure at its center than the areas around it. Wind blows away from high pressure. Winds of a high pressure system swirl in the opposite direction as a low pressure system - clockwise north of the equator and counterclockwise south of the equator. This is called anticyclonic flow. Air from higher in the atmosphere sinks down to fill the space left as air blew outward. On a weather map the location of a high pressure system is labeled with a blue H.

How do we know what the pressure is? How do we know how it changes over time? Today, electronic sensors are used to measure air pressure in weather stations. The sensors are able to make continuous measurements of pressure over time. In the past, barometers were used that measured how much air pushed on a fluid such as mercury. Historically, measurements of air pressure were described as "inches of mercury." Today, meteorologists use millibars (mb) to describe air pressure.

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Apr 07, 2018 | Homework

### How can wind blow in one part of the city and not in another, just a few blocks away?

It would be dependent on the structures in the area. Wind is generally diffuse and spreads out in velocity the father away from the center of the front or pressure area. IT cannot just stop in a single line.

Jun 03, 2014 | Saws

### Using the formula developed by brier and panofsky,determine the storm central pressure if the approximate velocity velocity of winds at low pressure area is 40 knots

Panofsky and Brier methods is normally being used for the conversion of barometric pressure to speed in m/sec or to nm/hr (knots). Being a professor in a maritime schools for this lesson, i encourage students to understand this.

P&B Methods:
If you use SVPAM Calculator
(1016-PO)= square root = x 3.5 + 3.9 = velocity in m/sec

PO = Pressure Observed
so practical.. :) SIR JAPZ

Jan 24, 2013 | Casio fx-300ES Calculator

### Replacing starter pull cord on 77 20hp mercury

Remove the starter housing from the top of the motor and see if the spring broke or back wound it's self when the rope broke. If all is well remove the rest of the rope from the spool by feeding it back thru the guide hole the handle rests on. Wind it out and find a hole drilled thru the spool and put a punch thru it to lock the spool in place against the spring pressure. Remove the old cord. If it has a steel hook glued to the anchor end you will need a real mercury part. If it has a knot. your in luck.

Take your new cord and burn one end and roll the cord to a point while it is still molten. Tie your knot and heat it till it is cooked so it won't untie itself. Feed the pointy end thru the spool and out the front of the housing. Tie a knot it it where the handle would go. Gently feed the rope on to the spool when you remove the punch.

You will have more rope than the spring could wind. so untie the end knot and feed it back to the spool and put the cord in the notch of the spool so it won't rub on the housing and wind a few more turns into the spring .

When it has enough pressure to completely wind the cord up. put the punch back in the lock hole and feed the cord out the hole thru the handle and knot it, then cook that knot as well.

Sep 16, 2012 | Boating

### Rope broke

Starter rope is sold at home centers like Lowes and Homedepot. It is important to buy the same thickness of rope so that an ample amount will fit into rewind spool(starter rope is sold by size from 3.5 to 6.5) . Remove the starter cover /fan cover if the starter is riveted to fan cover (or just remove the pull rewind if bolted on). With cover removed, notice how the rope enters thru bushing and ties onto spool. Visualize in which direction the spool turns when you pull the rope. This is the direction that you will be winding the spool. Fish out the old rope and wind the spool in the direction mentioned above. The spool will get tighter as you wind. When the spool will not wind another turn, back-off one turn and align hole in spool to bushing on cover. Insert rope thru bushing into hole and tie knot (any knot that will not obstruct motor parts). At this point allow the rewind to take-in the rope to stop at handle. Test your work. The rope will break if you try to start the washer under load. Press trigger on wand to release pressure. Also the rope is stressed when the operator has a very long strong arm and pulls out the rope to bottom out at the knot. Good luck with your repair

Aug 04, 2011 | Briggs & Stratton 3000 PSI Pressure Washer

### What is the formula of Panofsky & Brier for wind velocity in meters per second and knots?

Jun 19, 2011 | Computers & Internet

1. Do you mean that there are knots in the bobbin thread?

If yes to 1. you need to rewind your bobbin fresh, and keep slight tension on the thread reel that you are winding it from. Put the handle of your scissors into the top of the reel to apply a gentle pressure while winding. Keep your eye on the bobbin as it winds and give it a nudge with a finger tip to ensure it winds the bobbin evenly top, middle and bottom.

If yes to 2, then you need to check your bobbin threading, is the thread even under tension. Is the bobbin tension set correctly. Break out your manual and revisit this to ensure it is set correctly.

Feb 27, 2011 | Brother XL-5340 Mechanical Sewing Machine

### What causs downdraft on a stove?

Purchase a extension pipe along with a cap. These caps allow the exhaust to escape but discourage reverse air flow they look like and upside down funnel.

Dec 08, 2009 | Blue Rhino Outdoor Wood Burning Fireplace...

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