High Altitude Towed Glider

High Altitude Towed Glider

Author: National Aeronautics and Space Adm Nasa

Publisher: Independently Published

Published: 2018-12-30

Total Pages: 30

ISBN-13: 9781792632518

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The concept of using an unmanned towed glider for high altitude scientific research had been previously proposed. This paper examines the feasibility of this concept by determining what impact the various characteristics of the tow line, glider and tow aircraft have on tow line drag. A description of the analysis and computer code used to generate the results is given. The parameters examined were glider altitude, tow aircraft glider separation distance, velocity, tow line drag coefficient and tow line material properties. The results from the analysis show that the tow line drag increases significantly with tow aircraft/glider separation. The drag increased from 940 N (211 lb) with a tow aircraft/glider separation of 3 km to 11,970 N (2691 lb) with a tow aircraft/glider separation of 10 km. The results also show that by varying some of the initial assumptions significant reductions in tow line drag and weight can be obtained. The variables which had the greatest effect on reducing the tow line drag were the decrease in tow aircraft/glider separation distance, the increase in tow line strength and the decrease in glider Mach number. Colozza, Anthony J. Glenn Research Center NASA-CR-198493, E-10296, NAS 1.26:198493 NAS3-27186; RTOP 537-10-20...


Glider Flying Handbook

Glider Flying Handbook

Author: Federal Aviation Administration

Publisher: Skyhorse Publishing Inc.

Published: 2007-07

Total Pages: 241

ISBN-13: 1602390614

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For both certified glider pilots and students attempting certification in the glider category, this is an unparalleled...


Aerotowing Gliders

Aerotowing Gliders

Author: John Marriott

Publisher: AuthorHouse

Published: 2011-06-01

Total Pages: 145

ISBN-13: 1456775162

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This is an extract from the main text) This book on aerotowing gliders was written because there is little reference material published about the subject worlwide. So because of the lack of published information, I thought it important to gather the wealth of knowledge that is out there on the subject, collate it and present it to our community in the interests of safety ands efficiency The book is intended as a comprehensive guide to glider towing operations, with that all important emphasis on safety. The intent is to provide all the relevant information in one straightforward, easy to read book. The notes are intended to be very generic and non-country specific. Even though local procedures differ, hopefully the information should be useful to any glider tug pilot, anywhere in the world. Each gliding organisation has its operating environment and problems, therefore should adapt, further or improve these suggestions to suit their own needs. It is fundamental that every tug pilot be a person who is both trustworthy and highly reliable as it is a flying task with huge responsibility placed on the pilot. Aerotowing is expensive, can be noisy and has its own special hazards. These factors have a bearing on the very existence of gliding and it is therefore essential that glider aerotowing be carried out safely, efficiently and thoughtfully, paying particular regard to our neighbours. Your particular aerotowing should of course be carried out in accordance with national laws, regulations, procedures and in conjunction with your organisations flying rules. As the pilots in command of an aircraft you are ultimately responsible for the safe conduct of the flight and the actions that you choose to take. The glider pilots requirements should of course be accommodated as far as possible. Glider aerotowing should be good for your general flying skills. As a flying and gliding instructor for over twenty five years, I have noticed that most glider tug pilots are often also glider pilots and have above average handling and situational awareness skills. Flying tugs should of course also be quite good fun! It is hoped that this comprehensive book will meet the ground school requirements of any current or future glider towing ratings.