Getting Started | Soaring Society of America https://www.ssa.org/category/getting-started/ Aviation Gliding Thu, 27 Apr 2023 02:10:16 +0000 en-US hourly 1 https://wordpress.org/?v=6.4.3 Foreign Pilots https://www.ssa.org/foreign-pilots/ https://www.ssa.org/foreign-pilots/#respond Tue, 08 Sep 2020 07:00:32 +0000 https://soaring.wpengine.com/?p=1489 Non-US glider pilots may still receive reciprocal privileges in the United States. However, the necessary steps for receiving these documents have changed as a result of the attacks of September 11th. New security protocols are in place and the processing system has been changed to include direct verification of home country privileges as well [...]

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Non-US glider pilots may still receive reciprocal privileges in the United States. However, the necessary steps for receiving these documents have changed as a result of the attacks of September 11th. New security protocols are in place and the processing system has been changed to include direct verification of home country privileges as well as submitting the name of the pilot to law enforcement for verification of security status.

Please note: The general process may take up to 60 days, or even longer. However, closely following the steps indicated below will help reduce the length of time necessary to complete the process.

FOREIGN LICENSING STEPS

  1. Go to the Federal Aviations Administration’s web site.When there, scroll down the page to the link that says ‘Verification of Authenticity of Foreign License, Rating, and Medical Certification.’There you will find complete instructions as well as links to the forms that must be completed and faxed to the Airman Registry Office in Oklahoma City, Oklahoma.
  2. Follow this link, FSDO, to another Federal Aviation Administration web site that lists all the available Flight Standards District Offices (FSDO). You will need to pick an office in which to appear in person for verification of your identification and foreign airmen documentation. The FSDO that you pick will be requested on the form that you submit to the FAA in Oklahoma City, Oklahoma.
  3. It will be most helpful and less time consuming if you provide the FAA with complete information on how to contact the organization or government entity that issued your glider license.
  4. If you have any questions please feel free to contact the SSA at any time. You may send us a fax, an e-mail or call by phone.
  5. Come to the U.S. and enjoy some of the best soaring conditions in the world

Questions?

We are here to help!

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Glider Pilot Ratings https://www.ssa.org/glider-pilot-ratings/ https://www.ssa.org/glider-pilot-ratings/#comments Tue, 01 Sep 2020 02:57:13 +0000 https://soaring.wpengine.com/?p=1408 Glider licenses are issued by the Federal Aviation Administration (FAA) and in that regard is similar to that issued to power pilots or balloon pilots. The FAA maintains a list of frequently asked questions for new pilots and requirements for pilot licensing (Glider Pilot Ratings) are included in Part 61 of the Federal Aviation Regulations. The basic [...]

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Glider licenses are issued by the Federal Aviation Administration (FAA) and in that regard is similar to that issued to power pilots or balloon pilots. The FAA maintains a list of frequently asked questions for new pilots and requirements for pilot licensing (Glider Pilot Ratings) are included in Part 61 of the Federal Aviation Regulations. The basic requirements are below. The Where To Fly Map is the easy way to locate your closest training center.

STUDENT PILOTS

Student pilots may solo at a minimum age of 14 with a student certificate endorsed for solo flight at the discretion of a FAA-Certified Flight Instructor for Gliders (CFIG). Generally, 30 to 40 flights with a CFIG are required to solo. This is roughly equivalent to 10-12 hours of flight time and is dependent upon the progress of the student.

PRIVATE PILOT-GLIDER

After solo, student pilots may qualify as a Private Pilot-Glider provided they:

  • Are at least 16 years of age; and
  • Have logged at least 10 hours of flight time in a glider and that flight time must include at least 20 total glider flights, and
  • Have 2 hours of solo flight time in a glider, and
  • Have passed the FAA written examination; and
  • Have passed the flight exam with a FAA Examiner.

COMMERCIAL PILOT-GLIDER

Commercial Pilots-Glider must…

  • Be at least 18-years of age
  • Pass a written FAA examination
  • Hold a Private Pilot license with…
    • 25 hours of flight time in gliders and
    • 100 glider flights as pilot-in-command, or a total of 200 hours of flight time in heavier-than-air aircraft including 20 glider flights as pilot-in-command, 3 hours or ten flights training in a glider, and five solo flights in a glider and pass a flight test.

CERTIFIED FLIGHT INSTRUCTORS-GLIDER

Certified Flight Instructors-Glider must…

  • Hold a commercial rating
  • Pass a written and flight test
  • Have an endorsement from a qualified instructor of aeronautical knowledge and flight of proficiency

ADDITIONAL PILOT RATING

Holders of a valid FAA Power plane license with 40 hours as pilot-in-command need…

  • a minimum of 10 solo flights to qualify to take the glider flight test
  • No written exam is required to add a glider rating to a power license

*In all cases, refer to the Federal Aviation Regulations for details on pilot licensing.

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Learn to Fly Gliders https://www.ssa.org/learn-to-fly-gliders/ https://www.ssa.org/learn-to-fly-gliders/#comments Fri, 17 Jan 2020 01:53:18 +0000 https://soaring.wpengine.com/?p=530 Learn to Fly Gliders Accept the challenge & become a part of the world of glider pilots. Your first step in learning to fly a glider is to take an introductory lesson in a sailplane. That flight will introduce you to a world you have never known. And it [...]

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Learn to Fly Gliders

Accept the challenge & become a part of the world of glider pilots.

Your first step in learning to fly a glider is to take an introductory lesson in a sailplane. That flight will introduce you to a world you have never known. And it is so exciting that you will want to explore it, to learn more about it and to become part of it. Accept that challenge and you are on your way to becoming a part of the world of glider pilots. As with any course of study, the more material you read on your own, the faster you’ll learn and the more competent you’ll be. The Soaring Society of America Online Store, commercial glider schools and book dealers listed in Soaring Magazine can provide textbooks containing all the theory and essentials of flight, soaring techniques, safety, navigation and meteorology, as well as the Federal Aviation Regulations you will need to know to pass the FAA written examination. You will be studying this material while you are taking your flying lessons. After you have passed your FAA written examination, your instructor will recommend you to take the Private Pilot Glider oral and flight test. Passing this test will entitle you to take passengers for rides.

Lessons can be scheduled at your convenience. The closer together the lessons are, the easier it is to build on the knowledge gained from previous lessons, and the faster you will learn. Most people try to fly at least once a week, and most prefer to take more than one flight during each lesson.

A sailplane is docile yet responsive.

The sailplane you will fly has dual flight controls, and your instructor will sit behind you. Your instructor has all the directional controls that you have and will show you the control motions or follow along with you as you are learning to guide the sailplane. If you have not flown before, some of the maneuvers and coordination may seem a bit difficult at first. After a few flights, however, you will be making the sailplane do what you want it to do, and you will wonder why you ever felt so clumsy on your initial flights. You will learn that a sailplane is a docile yet responsive machine that answers to gentle, coordinated pressures on its controls. You’ll learn to fly the sailplane straight-and-level, to turn it in varying degrees of bank, and to recognize and recover from stalls. You will practice flight courtesy and safety, and will glide down to enter the airport traffic pattern at a predetermined altitude. You will fly your approach precisely, land your craft with its wings level, and stop where you want to stop. You will learn emergency techniques so there will be no unexpected surprises for you when you become a licensed glider pilot.

How long does it take to solo?

How long it takes you to solo depends on a number of factors. These might include any previous pilot experience you have had, how open you are to your instructor’s guidance, and how relaxed you are. Other factors include the type of sailplane you are flying, the weather during your training, and the degree of experience and proficiency your particular program of training requires before permitting you to solo. The requirement for an airport located on an uninterrupted plain in Kansas might well be different from the requirement for an airport cut out of a forest of Joshua trees.  You can solo if you are 14-years old or older. Most instructors feel that 30 to 35 flights are the minimum needed for most people with no previous flight experience. An experienced power (airplane) pilot can generally solo a sailplane in less than 10 flights. Gliders and glider pilots are regulated by the Federal Aviation Administration (FAA) who set the minimum requirements for pilot certificates.

The cost of training from beginning through solo.

Cost of training from beginning through solo at a commercial gliderport will vary depending upon where it is and how rapidly you progress. After you have soloed, you will continue to fly with an instructor from time to time to see that you are maintaining good flying habits and developing your judgment and flying skills. Learning to fly a sailplane safely is easy. The instructor can teach you the mechanics of flying the glider in just a few lessons. But don’t be led too quickly into thinking that you have learned all there is to know. Learning to soar is a series of steps and plateaus. How high on that ladder you wish to climb is up to you. Some pilots are content to soar around an airport. Others find exhilaration and satisfaction in cross-country flight and ultimately in competing with other pilots. Learning while flying is fun; a fine balance of determination, flexibility, and practice is necessary to gain the proficiency you will need to get the most out of your sailplane.

Different launching methods

Aero tow launches are the most widely used method of getting a glider airborne in the U.S. today. The sailplane is pulled aloft by a 200 foot nylon or polypropylene rope secured by a special hook to the tow plane. The sailplane pilot can release the tow rope at any altitude desired. In the unlikely event of a sailplane release mechanism malfunction, the tow plane pilot can release the tow line. Auto launches are sometimes used. A 1000 to 2000 foot rope connects the sailplane to a special hook on the towing automobile. When the signal is given, the tow vehicle drives down the launch runway and the glider pilot flies the glider up to an altitude of 800 to 1500 feet or so, then releases the tow line which falls gently to earth. Winch launches can achieve altitudes of 500-2000 feet before release, depending on the length of the winch line, the wind strength and the power of the winch. Auto and winch launches are less expensive than aerotows and may require additional ground support.

GETTING STARTED FAQS

How fast does a sailplane fly?2021-01-27T12:59:48-07:00

Typical flight speeds are about 60 mph but can be as high as 160 mph and as low as 30 mph.

What keeps a glider up in the air?2021-01-27T12:59:09-07:00
Thermal Lift

“Lift”, rising air. It is an exercise in relativity: a sailplane typically sinks 200 feet per minute (about 2 mph) through the air that surrounds it. If that air is moving upwards faster than 2 mph, the glider rises relative to the ground. In the early 1920s, glider pioneers were doubtful that consistent large upward currents of 2 mph could reliably develop in the atmosphere and be exploited by pilots. Perhaps soaring was only for the birds, slow and maneuverable as they were. Once they tried, they soon found out that useful lift is quite common and it is a rare day that a glider cannot do at least a little soaring.

How long does it take to solo?2020-07-25T21:16:32-06:00

Most instructors feel that 30 to 35 flights are the minimum needed for most people with no previous flight experience. An experienced power (airplane) pilot can generally solo a sailplane in less than 10 flights. Gliders and glider pilots are regulated by the Federal Aviation Administration (FAA) who set the minimum requirements for pilot certificates.

How much does it cost to become a Private Pilot Glider?2021-01-27T17:10:09-07:00

The cost to become a Private Pilot-Glider varies greatly from person-to-person depending on the amount of time needed to master the necessary skills.  In addition, each soaring club offers different rates both for instruction and for aircraft rentals.  Call your local soaring club for detailed information.

What are the age requirements?2020-07-25T21:16:33-06:00

Student pilots may solo at a minimum age of 14 with a student certificate endorsed for solo flight at the discretion of an FAA-Certified Flight Instructor for Gliders (CFIG). After solo, student pilots may qualify as a Private Pilot-Glider provided they are at least 16 years of age.

What is Soaring?2021-01-27T17:30:33-07:00

Most gliders typically do not have a propellor and are launched by an aerotow, that is they are pulled by a rope up to about 2,000′ by another power-driven aircraft.  Once airborne, a glider or sailplane uses only atmospheric uplift (rising air) to gain height and can usually fly faster than the wind. Soaring is the art of developing skills and knowledge as a pilot to use this rising air for flight.

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What is Soaring https://www.ssa.org/what-is-soaring/ https://www.ssa.org/what-is-soaring/#respond Wed, 15 Jan 2020 21:07:48 +0000 https://soaring.wpengine.com/?p=441 What is Soaring The terms gliding & soaring are used interchangeably. To fly as the hawk and eagle has been mankind's dream for centuries. Modern sailplanes make soaring flight possible, and with them humans can fly higher, faster, and farther than the greatest of birds, using only [...]

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What is Soaring

The terms gliding & soaring are used interchangeably.

To fly as the hawk and eagle has been mankind’s dream for centuries. Modern sailplanes make soaring flight possible, and with them humans can fly higher, faster, and farther than the greatest of birds, using only an invisible force of nature to stay aloft. The sport is called “soaring” and to pilot as well as spectator, it has universal appeal. The terms gliding and soaring are used interchangeably. There are many soaring sites in the United States. Visit one and you are likely to find the pilots are men, women, and young people whose experience in sailplane flying may vary greatly, but who share a common bond in being participants in one of the world’s most satisfying and exhilarating sports. How else, within an hour or so of your home, can you become Columbus or Magellan, exploring the unknown?

One of the world’s most satisfying & exhilarating sports.

Soaring offers a sense of freedom unique in sports. As a soaring pilot you are no longer earthbound; as your pilot skills increase, you will learn to venture away from the airport in a sailplane, relying on your own skills and judgment in analyzing the terrain and weather. Instead of passively enjoying the countryside or the sky, you will actively look for lift clues in the air, such as birds and the maturity of cumulus clouds; and you’ll gain respect for areas on the ground that can help or hinder you in meeting the continuing challenge of staying aloft.

A Sense of Freedom

The intellectual challenge of soaring is its main appeal to many glider pilots. Gravity tells you that you and your machine, which together may weigh 500 to 2000 pounds, have no business staying aloft and that your place is on the ground since you have no engine to stay airborne. You know that the sun and the wind are providing an invisible force frequently far stronger than the force of gravity, but it’s up to you to make the most of that force through your interpretation of it and of your own pilot skills. The best combination brings the longest flight, the highest altitude gain, or the fastest speed in a contest.

The sun & wind provide an invisible force.

For sheer beauty, the sport of soaring is unsurpassed. Sailplanes may vary widely in design but they are all graceful – especially when moving through the sky. Seeing the familiar earth drop away and become ever smaller creates a profound feeling of awe as your sailplane climbs toward the clouds. And the clouds themselves take on new meaning and importance as the earth becomes divided into friendly areas of lift or unfriendly areas of sink. The pilot can enjoy a special kind of relaxation, too. Aside from the swish of wind over the wings, there’s the meditative silence that can have a refreshing unwinding effect. The gain in altitude seems to leave mundane cares on the surface of the earth far below.

GETTING STARTED FAQS

How fast does a sailplane fly?2021-01-27T12:59:48-07:00

Typical flight speeds are about 60 mph but can be as high as 160 mph and as low as 30 mph.

What keeps a glider up in the air?2021-01-27T12:59:09-07:00
Thermal Lift

“Lift”, rising air. It is an exercise in relativity: a sailplane typically sinks 200 feet per minute (about 2 mph) through the air that surrounds it. If that air is moving upwards faster than 2 mph, the glider rises relative to the ground. In the early 1920s, glider pioneers were doubtful that consistent large upward currents of 2 mph could reliably develop in the atmosphere and be exploited by pilots. Perhaps soaring was only for the birds, slow and maneuverable as they were. Once they tried, they soon found out that useful lift is quite common and it is a rare day that a glider cannot do at least a little soaring.

How long does it take to solo?2020-07-25T21:16:32-06:00

Most instructors feel that 30 to 35 flights are the minimum needed for most people with no previous flight experience. An experienced power (airplane) pilot can generally solo a sailplane in less than 10 flights. Gliders and glider pilots are regulated by the Federal Aviation Administration (FAA) who set the minimum requirements for pilot certificates.

How much does it cost to become a Private Pilot Glider?2021-01-27T17:10:09-07:00

The cost to become a Private Pilot-Glider varies greatly from person-to-person depending on the amount of time needed to master the necessary skills.  In addition, each soaring club offers different rates both for instruction and for aircraft rentals.  Call your local soaring club for detailed information.

What are the age requirements?2020-07-25T21:16:33-06:00

Student pilots may solo at a minimum age of 14 with a student certificate endorsed for solo flight at the discretion of an FAA-Certified Flight Instructor for Gliders (CFIG). After solo, student pilots may qualify as a Private Pilot-Glider provided they are at least 16 years of age.

What is Soaring?2021-01-27T17:30:33-07:00

Most gliders typically do not have a propellor and are launched by an aerotow, that is they are pulled by a rope up to about 2,000′ by another power-driven aircraft.  Once airborne, a glider or sailplane uses only atmospheric uplift (rising air) to gain height and can usually fly faster than the wind. Soaring is the art of developing skills and knowledge as a pilot to use this rising air for flight.

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Is Soaring Safe? https://www.ssa.org/safety/ https://www.ssa.org/safety/#respond Sat, 31 Aug 2019 23:02:33 +0000 https://soaring.wpengine.com/?p=1335 Soaring Safety Is Soaring Safe? Soaring flight is almost exclusively a daytime activity and severe weather is generally avoided. Although flights can extend into extreme conditions, such flights are normally planned and prepared for by experienced soaring pilots. The sport is considered safe enough that the Federal Aviation [...]

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Soaring Safety

Is Soaring Safe?

Soaring flight is almost exclusively a daytime activity and severe weather is generally avoided. Although flights can extend into extreme conditions, such flights are normally planned and prepared for by experienced soaring pilots. The sport is considered safe enough that the Federal Aviation Administration will allow 14-year-olds to fly gliders solo, while in most states they must wait until they are 16 to drive automobiles

Knowing the Limits

Pilots learn to fly sailplanes knowing the limitations of their craft and their own personal flying ability, and plan their flights accordingly. Good pilots always keep a safe landing site within gliding distance. Take a good training program, add a dash of self-discipline, and you have the recipe for safe, lifelong participation in a glorious sport.

Soaring Safety Articles

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Cross-Country Flying https://www.ssa.org/cross-country-flying/ https://www.ssa.org/cross-country-flying/#respond Sat, 31 Aug 2019 22:49:30 +0000 https://soaring.wpengine.com/?p=1330 Cross-Country Flying "Heading Out on Course" When you have earned your private pilot glider certificate, you'll find the best is yet to come. As your skills and confidence improve, you will learn to leave your home field, head out on cross-country flights, work for proficiency badges, and perhaps enter [...]

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Cross-Country Flying

“Heading Out on Course”

When you have earned your private pilot glider certificate, you’ll find the best is yet to come. As your skills and confidence improve, you will learn to leave your home field, head out on cross-country flights, work for proficiency badges, and perhaps enter soaring contests. Numerous fly-ins and badge and wave camps offer soaring pilots and their families and friends a chance to vacation and fly in some of the most beautiful parts of the country. The accomplishment of flying from one airfield to the next, leaving the comfort of known thermal sources and home-field familiarity, is a thrill unequaled in any other sport. The pilot must draw on his accumulated knowledge of the ground and the air mass, navigation, and flying skills plus a dash of adrenalin. Even the most experienced pilots never lose the exhilaration of “heading out on course.”  To fly cross-country, the pilot circles up within a “bubble” of rising air, then leaves it to head out on course and find a new source of lift. If cumulus clouds are present, the pilot assesses them constantly, looking for growing young clouds that have a high probability of providing rapid climb. Climb and glide, climb and glide… the rhythm of the flight develops as the cross-country adventure unfolds. No two cross-country flights are ever the same.

Soaring Aviation Ground Crew cross-country flying

Your Ground Crew

For flights of any significant distance, pilots may enlist the support of a one or two-person ground crew, whose job it is to see that the pilot is retrieved at the end of the flight (if the pilot does not return to the home gliderport). The crew helps prepare the pilot and glider for departure and then monitors the flight’s progress via two-way radio. For most flights of any great distance, this is usually done as the crew drives along the pilot’s intended course. In this way, the crew always knows where the pilot is and can rendezvous quickly if a landing is made.

Off-Field Landings

If it is not possible for the pilot to land on an airport, an off-field landing is required. Because of the sailplane’s sturdy single wheel safe landings can be made on relatively rough ground, such as plowed fields. Sailplanes can be landed in relatively short areas, so there are usually many acceptable landing sites from which to choose. Once the crew car has arrived, it’s time to disassemble the glider and load it onto its special trailer. During the drive back to the home field, the pilot unwinds, chatting about the adventure just completed and slowly returns to the land of ordinary mortals.

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Sailplane Construction & Cost https://www.ssa.org/sailplane-construction/ https://www.ssa.org/sailplane-construction/#comments Sat, 31 Aug 2019 22:07:52 +0000 https://soaring.wpengine.com/?p=1309 Sailplane construction & cost Sailplane Materials Sailplanes construction begins with carbon composites, fiberglass, aluminum, wood, special fabric stretched over steel tubing, or any combination of these materials. Wingspans vary in size from under 40 feet to nearly 90 feet. Fuselage lengths range from 20 to 30 feet. And [...]

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Sailplane construction & cost

Sailplane Materials

Sailplanes construction begins with carbon composites, fiberglass, aluminum, wood, special fabric stretched over steel tubing, or any combination of these materials. Wingspans vary in size from under 40 feet to nearly 90 feet. Fuselage lengths range from 20 to 30 feet. And the empty weight of the glider may be as little as 150 pounds, or nearly 1000 pounds for a glider that can carry three people.

Some sailplanes have engine-drive propellers mounted in the nose or retractable mounts projecting above the fuselage. The power plants are small, lightweight, low horsepower engines mounted in the shell of the glider. Motorgliders are gaining in popularity in the United States because they offer the pilot the freedom of self-launching out of any airport.

SAILPLANES FOR SALE

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Investing in a Sailplane

New, factory-built sailplanes may cost $50,000 to over $300,000 or more depending on performance, construction, and equipment. Excellent kits for homebuilding are on the market, enabling enthusiasts to produce a sailplane at a cost of one-third to two-thirds that of a factory-built machine. Shared ownership is one way to moderate the cost of some of these gliders. For those who can neither afford a new sailplane nor want to build a sailplane, the second-hand market of gliders provides a wide variety of relatively inexpensive alternatives. Older models of factory-built gliders, as well as used home-built gliders, are often quite economical to buy and to own. There is virtually nothing to wear out on most sailplanes, and they have proven to be excellent investments because they hold their value well and often appreciate in value.

Glider Rentals & Clubs

Many pilots prefer to rent gliders from a commercial gliderport rather than buy a glider. Many other pilots enjoy relatively low-cost soaring through membership in the more than 200 soaring clubs in the United States. By joining a club, partnership, or syndicate, glider pilots can fly in sailplanes that otherwise might not be affordable. Shared expenses and greater utilization of equipment means lower costs for each member. Clubs also offer opportunities to participate in local contests, fly-ins, cross-country camps, and other enjoyable social events.

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Lift Sources https://www.ssa.org/lift-sources/ https://www.ssa.org/lift-sources/#comments Sat, 31 Aug 2019 21:36:36 +0000 https://soaring.wpengine.com/?p=1296 Lift Sources It's easy for a sailplane to stay aloft without an engine. It's easy for the slender sailplane to stay aloft without an engine, since it is aerodynamically designed to glide efficiently through the air. Gravity slowly draws it toward the earth's surface. Generally, a 20-25 minute flight [...]

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Lift Sources

It’s easy for a sailplane to stay aloft without an engine.

It’s easy for the slender sailplane to stay aloft without an engine, since it is aerodynamically designed to glide efficiently through the air. Gravity slowly draws it toward the earth’s surface. Generally, a 20-25 minute flight will result after the sailplane releases from a 3000-foot aero tow, when no rising air currents are found to extend the flight. The pilot in the sailplane can achieve a longer flight if the air mass in which he is flying is rising at a faster rate than the sailplane is gliding downward. When this happens, the real thrill of flying without an engine begins! The most common sources of lift are thermal lift, ridge or slope lift, and wave lift.

Cross Country Soaring lift sources

Thermal lift is dependent upon solar energy.

Thermal lift is dependent upon solar energy. The earth, when heated by the sun, warms the air next to it, causing it to expand and rise just like steam coming from a boiling kettle. Bubbles of warm, rising air form into columns called thermals. Some terrain absorbs heat from the sun more rapidly than the surrounding earth. Dark plowed fields, asphalt parking lots and rocky terrain absorb the sun’s heat quickly and provide excellent sources of lift. Open countryside and desert lands are also known for their strong thermals. In some areas of the United States, sailplanes have ridden thermals up to altitudes of 25,000 feet!

Ridge Soaring lift sources

Ridge lift, or Slope lift, is dependent upon wind.

Ridge lift, also called slope lift, is dependent upon wind. When the wind blows against a mountain, hill, cliff, or ridge line, the air flow is deflected upward and depending on the strength of the wind can rise hundreds of feet above the top of the ridge. Sailplanes can fly back and forth for hours on the narrow band of rising air on the upwind side of the ridge. Flights of more than 1,000 miles have been made using the ridge lift along mountain chains.

Mountain Wave Soaring lift sources

Mountain Wave Flying

Mountain wave flying is especially exciting to many glider pilots. This meteorological phenomenon occurs when strong winds (more than 25 mph) blow perpendicular to a mountain or ridge. The wind flows over the top of the obstruction and down the opposite side, where it bounces off a layer of stable air near the ground and is deflected upward many thousands of feet to stable air where it bounces downward again. This wave action can occur many times in succession and is very similar to what you see when water flows over a submerged log in a stream. Sailplanes can rise at 2,000 feet per minute or more in the rising air on the upwind side of each wave. Wave flights can reach altitudes of 35,000 feet or more. At these altitudes, supplemental breathing oxygen and other precautions are necessary.

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