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Dancing with the Wind - Jean-Marie Clement
Dancing with the Wind - Jean-Marie Clement Dancing with the Wind - Jean-Marie Clement Dancing with the Wind - Jean-Marie Clement page 292 Dancing with the Wind - Jean-Marie Clement page 211

Dancing with the Wind

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Detailed Description

Dancing With The Wind

Dancing With The Wind

General Description

The first book dedicated exclusively and exhaustively to slope and wave flying, with the very first aviation details of Hydraulic Jumps, how to identify and use them. New information on the intelligent use of Oxygen.

Published both in English and French, this is the first Manual of Sailplane Slope and Wave soaring techniques. Everything you need to know to fly using the wind, happily and safely.

All about the wind, why, where and how, local breezes, convergences etc.

Explaining tricks and tips of slope soaring and real dangers, from the first slope flying records by Karl Striedieck in the USA until today.

All about the theories of the formation of waves, from Queney to Scorer and Wurtele, including atypical waves and Hydraulic Jumps (Bidone's jump). Specific techniques to use lee waves, especially non conventional ones, including wake waves. Narratives from pilots having survived a potentially fatal accident.

Theory and application of the “Speed–To–Fly” concept in strong winds. Review of structural limitations and narratives of pilots having exceeded these limitations (after having bailed out).

Review of all health issues linked to mountain and high altitude flying.

Intelligent use of Oxygen: new regulations and reality: The rules of in–flight experiments on Electronic Delivery Systems for oxygen (EDS®), all the secrets revealed, then recommendations.

How to maintain “zero tolerance of hypoxia”. Altitude of the Pilot in Command: “Good Airmanship”.

Author: Jean–Marie Clément, together with Dr. Heini Schaffner for oxygen medicine and Dr. Gilbers Bouteiller for general medicine.
Pages: 304 pages, full color, 211 high definition photos and color drawings. Copyright 2015.
Dimensions: 8.5 x 11.0 x 0.91 inches (216 x 280 x 23 mm)
Weight: 1.45 kg (3.2 lbs)


“Imagine that you are walking through a large, dark and well known room – and that you do so with ease because you are familiar with its invisible contents.

Or that you are flying through the atmosphere, whose transparent air hides its invisible movements – again doing so with ease in normal, familiar conditions.

But now imagine yourself running through a dark room full of energetic, moving equipment, looking for treasures to catch on the run: after a few steps, hopefully before you hurt yourself, you realize you need a map and a lamp, to avoid the dangers and navigate towards the treasures.

This book reveals to you the invisible treasures of the atmosphere, explains its promises and its dangers and teaches you how to enjoy them.

Even if you never left your armchair, you will wonder at the hidden beauties and incredible energies of our sky and you will learn how to read its state and ride its magic carpets.

But, as the author tirelessly warns you at every new chapter of this marvelous book, do not enter this environment without thoroughly understanding it, or you may be severely punished –flying thousand miles without an engine, at Everest’s altitudes over unlandable deserts, is now possible but cannot be improvised – you need to fully comprehend the aerial phenomena, the flying equipment and, above all, yourself, your physiology and your psychology.

My personal flying experience barely allows me to fully appreciate how deeply, how passionately the author is sharing his wide, hard earned knowledge about flying gliders in extreme environments: Jean–Marie provides us with a “beautiful map and a strong lamp” to safely explore one of the last hidden jewels of our fantastic planet – for this gift not only the gliding community but every curious, nature loving person will be forever indebted to him.” – Alvaro de Orleans–Borbón


“Opening this book is like discovering a buried hoard of precious jewels. it is printed in full color and Jean–Marie Clément has made good use of this to illustrate the text with beautiful photos and clear diagrams on almost every one of its 300 pages; but the real value is in the wisdom and experience that it contains.

Although Jean–Marie has been soaring at top level for 50 years, few UK pilots are familiar with him, because his soaring experience has been mainly in France and Italy and latterly in Argentina as well. Holding 27 French records and six World records allows him to write with great authority.

As befits an author whose playground has been in the hilly and mountainous parts of the world, this book covers almost every type of soaring, except for the classic flatland thermal soaring that we typically enjoy in southern England. There are chapters on slope soaring, mountain thermals, various types of wave lift, and wave flying techniques. Further chapters tackle aspects of long distance flying at high altitude, including human factors and using electronic oxygen breathing systems.

This is a book for experienced pilots who are ready to stretch themselves by flying for longer and going further and faster using some of the most exciting and challenging soaring opportunities on the globe. Jean–Marie is careful to stress what you must do to mitigate the inevitable risks of flying close to the hills and mountains and over such inhospitable terrain. He emphasizes this with details of accidents where even skilled and experienced pilots have broken their gliders, or worse.

For me this is a “must-have” book; however, for some reason I didn’t find it an easy read. Occasionally the content is very technical. in some places the translation from French makes the meaning difficult to discern. Balanced against any shortcomings is the wealth of knowledge and experience, not only from the author, but also from other world class pilots, including our own John Williams, all assembled into a single volume. How did we manage without it?” – Phil King, Herefordshire GC

Dancing With The Wind Techniques to Use Lee Waves
Dancing With The Wind Determination of Speed-To-Fly
Dancing With The Wind Flight Planning Problem Management"

Table of Contents


    • 1.1 The synoptic wind, gradient wind…12
    • 1.2 Forecasting the wind…13
    • 1.3 The jet–streams…15
    • 1.4 Omega shape: flows pulled and flows pushed…18
    • 1.5 Where to find wind forecasts?…20
    • 2.1 Formation of Convergence fronts…24
    • 2.2 Using Convergences…25
      • In the Alps…26
      • In central Italy…29
      • In the Andean Cordillera…40
  4. History: USA Pioneer of slope flying long distances: Karl Striedieck. The first in Europe:
    Wolfgang Janowitsch et Hermann Trimmel (Austria). Today: Mathias Schunk and Alberto Sironi.

    • 3.1 The verticality of the wall, the horizontal component of wind…51
    • 3.2 Wind gradient along the slope…56
    • 3.3 How fast to fly along the slopes?…56
    • 3.4 The orientation of the ridge line relative to the wind…58
    • 3.5 The accelerators of flow: concavity or convexity…59
    • 3.6 Note on Right of way while slope soaring…60
    • 3.7 Presence of another slope upwind capable of creating a phase opposition.…60
    • 4.1 Blind corners, Collision danger…62
    • 4.2 The limits of authority of the roll control…63
    • 4.3 The hillside death trap of the thermal under the outer wing…65
    • 4.4 Deceptive Plateaus…66
    • 4.5 “Cap” Clouds…68
    • 4.6 Morning and Evening Oblique Light…78
    • 4.7 Cables…82
    • 4.8 The loss of lift due to vegetation…84
    • 4.9 Crossing a ridge downwind (variometer anomalies)…86
    • 4.10 Crossing of a col from the leeward side…86
    • 4.11 Wind rotation by the mountains: dextrorotatory or levorotatory…88
    • 5.1 Background theoretical studies and experiments on atmospheric waves…95
    • 5.2 Physical mechanisms at the origin of the formation of atmospheric waves…99
    • 5.3 Continuity of wave motion in the vertical plane, Richard Scorer
      • In conclusion…111
    • 6.1 Inversion wave and wind gradient wave (Progressing wave)…120
    • 6.2 Convective Wave…120
    • 6.3 Cold Front Wave…121
    • 6.4 Thermo–wave…122
    • 6.5 Wake waves from isolated mountains…125
  8. THE HYDRAULIC JUMP (Bidone’s jump)…133
    • 7.1 Introduction to Giorgio Bidone and his “salto” (jump)…134
    • 7.2 Introduction to Froude and the meteorology of mountains…136
    • 7.3 Atmospheric evidence and how to use it…137
    • 7.4 Jump induced by orography, in a valley downwind of a mountain…140
    • 7.5 The jump induced by a gap in the mountains or local absence of relief, local supercritical flows…148
    • 7.6 Typical situations in Europe and exploitation…152
    • 7.7 Concluding Notes…158
    • 8.1 Wave in the presence of thermals, isolated downwind cumulus…162
    • 8.2 Wave in the presence of thermals, cumulus aligned on the crests…163
    • 8.3 Wave in the presence of thermals, a layer of cumulus…165
    • 8.4 Wave in the presence of thermals, cumulus at two bases (confluence, convergence)…166
    • 8.5 Flying downwind of ridges not perpendicular to the wind…167
    • 8.6 When the slope is not in phase with the lee–wave rebound…169
    • 8.7 Negative wind gradient, rotors appearing to turn backwards…171
    • 8.8 Migratory Rotors…174
    • 8.9 Steepness of a downwind wall…177
    • 9.1 Best glide speed intowind…182
    • 9.2 Best glide speed downwind…183
    • 9.3 Optimizing the cross country speed in the presence of lift…184
    • 9.4 Influence of wing loading…185
    • 9.5 Direct influence of altitude…186
    • 9.6 Indirect influence of altitude…187
    • 9.7 Choosing the speed–to–fly…188
    • 9.8 Final Table…190
    • 9.9 Structural Limitations…192
    • 9.10 Airspeed Indicator (ASI) Errors…202
    • 9.11 Variometric errors…205
    • 9.12 Glider Selection and Preparation…206
    • 9.13 Conclusions…208
    • 10.1 Meteorological observations, choice of routes and waypoints212
      • The choice of task…212
      • The choice of turning points…214
      • The choice of start point…216
      • The choice of finish point…217
      • The choice of task length…217
    • 10.2 Preparation of the glider and settings: mass, center of gravity, controls, prevention of icing on the ground and at altitude…217
      • Mass…217
      • The antifreeze…218
      • Center of Gravity Position, (CG position)…220
      • The flight controls…220
    • 10.3 Special Checks on the ground, pre and especially post–flight…222
      • Pre–flight Checklist (before getting into the glider)…222
      • Take–off Checklist (if possible with closed canopy):…222
      • Post–flight inspections…222
    • 10.4 Periodic checks during the flight: airbrake lock, control stiffness (ailerons), flow and pressure of oxygen, the clock…223
      • Post–flight inspections…223
      • Control stiffness, particularly ailerons…223
      • Flow and pressure of oxygen…223
      • The clock and daylight…226
    • 10.5 Common Problems at altitude: condensation and internal canopy icing, spatial disorientation, clouds closing in, wing icing…229
      • Condensation when closing the canopy…229
      • The icing of the inside of the canopy…230
      • Spatial disorientation…232
      • Closing in of the clouds…233
      • Wing Icing
    • 10.6 Effects of temperature and moisture on gelcoat…236
    • 10.7 Effects of temperature on the different types of batteries…238
      • Lead acid with gel electrolyte…238
      • Pure lead–tin with internal recirculation…239
      • Lithium–ion and Lithium–Iron Phosphate…240
    • 11.1 Physiological Prerequisites…244
      • Dental hygiene…244
      • Ear Nose and Throat…244
      • Eyes…244
      • Venous Thromboembolic risks (Economy class syndrome)…244
      • Sub Aqua Diving…245
    • 11.2 Management of physiological problems…246
      • Urination…246
      • Protection against cold, clothing…247
      • Electric heating…250
      • Sun protection…250
      • Dysbarism, intestinal gas…251
      • Effects of coffee or tea…251
      • Dietary advice…251
      • The “Two o’clock Dip” (metabolism and biorhythm)…252
    • 11.3 DeCompression Syndrome (DCS) or DeCompression Illness (DCI)…253
    • 12.1 Warnings…258
    • 12.2 History of the regulations…259
    • 12.3 Reminders of basic aeronautical medicine (simplified)…260
      • The role of oxygen…260
      • Reduction in oxygen with altitude…261
      • Measuring the amount of oxygen in the blood: oximetry…262
      • Oxygen delivery systems…263
      • Hypoxic symptoms and the Effective Performance Time (EPT)…265
    • 12.4 Key recommendations for handling oxygen…267
    • 12.5 Main features of EDS and current limits…269
      • The first Mountain High® model, A1…269
      • The following model, D1…269
      • The latest model, O2D1…271
    • 12.6 Identified problems (the manufacturer is working on them)…272
      • The outlet pressure from the XCR regulator is not constant…272
      • The inlet pressure to the XCR regulator depends on the length of the pipes…273
      • The amount of O2 in (F) positions are not those we expect…274
      • The “Flow Fault” and “Apnoea” alarms are often inappropriate…278
      • In conclusion…280
    • 12.7 Cannula or mask, or both?…281
      • The consequences of US regulations…281
      • The basic mask and the cannula supplied as standard with the EDS…281
      • Optional, but effective, masks…283
      • Dr. Schaffner’s experiment with a reverse flow A–14 mask: demonstration of the effectiveness of expiratory pressure…283
      • Hyperventilation: the dangers, how to identify it and treat it inflight before the accident…283
    • 12.8 Hyperventilation, periodic breathing episodes: the dangers, know how to identify and treat it in flight before the accident…284
      • Non hypoxic hyperventilation: stress, fear, anxiety, over concentration, phobia…285
      • Hyperventilation following marked hypobaric hypoxia (Hypoxic Ventilatory Drive…287
      • Note on Cheyne–Stokes and EDS developments…288
    • 12.9 Identification of hypoxic incidents, practical experience of pulse oximetry…289
      • Experiments in flight…289
      • Study of real hypoxic incidents…290
      • To chat or suffocate, you haven't to decide!…290
      • Urination with difficulty…291
      • Eating a sandwich…292
      • To Cough or not to Cough, that is the question…293
    • 12.10 Conscious or voluntary, breathing deliberately against pursed lips, is necessary to exceed 6,000 m safely with a single EDS…294
      • From the point of view of EDS settings…297
      • Personal Attitude of the Pilot in Command…297
      • Conclusions…297
Dancing With The Wind Oxygen Basic Physiological Aspects

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