1 The airplane as an open source invention Peter B. Meyer, U.S. Bureau of Labor Statistics * *Findings and views are those of the author, not the BLS Session K10: Innovation without patents IEHA, Utrecht Aug 7, 2009

2 Development of the airplane (heavier than air, with fixed wings) 1860s Clubs and journals on “aerial navigation” appear It’s a niche activity – maybe hopeless, useless, and dangerous Publications do not refer much to prior work 1894 Survey book by Chanute refers to 190 people/experiments Increasingly publications refer to prior work. Many designs were shared openly. I seek to quantify this activity Powered-glider flights by Wright brothers and others 1909 An industry arises

3 Chanute’s 1894 overview Progress in Flying Machines refers to or quotes more than 190 persons Experimenter / groupPages location (background) Maxim33 Britain (US) Lilienthal31 Germany Pénaud22 France Mouillard21 Algeria, Egypt (Fr) Hargrave19 Australia (Br) Moy19 Britain Le Bris17 France Langley16 US Wenham15 Britain Phillips14 Britain These are counts of pages referring to the individual. The people are diverse and international. They are central to the history of the invention. Their findings were mostly public.

4 Alphonse Pénaud Horatio Phillips Engineer in France, 1870s Showed importance of tail on model aircraft for stability Examined shapes for upper and lower surfaces of wings, 1880s and 1890s

5 Lawrence Hargrave Made box kite findings circa 1894 Presented and published many papers Did not patent, on principle. Samuel Langley Professor; Smithsonian Institution Director Tested lift and drag of planes on “whirling table” with 30-foot arm 1891: Published Experiments in Aerodynamics Wrote to and visited other experimenters Helps make aviation study legitimate 1896: flew powered model gliders 1903: full size powered gliders

6 Founded company making steam engines in Berlin 1860s-80s studied bird wings and experiments 1889: published Birdflight as the Basis of Aviation : Flew inspirational hang gliders Otto Lilienthal Why? “... to soar upward and to glide, free as the bird” -- Otto Lilienthal, 1889

7 Motivations of experimenters Would like to fly Curiosity, interest in the problem Prestige, recognition Belief in making world a better place Make one nation safer Nobody refers to expected profits “... A desire takes possession of man. He longs to soar upward and to glide, free as the bird...” -- Otto Lilienthal 1889 “The glory of a great discovery or an invention which is destined to benefit humanity [seemed] dazzling.... Enthusiasm seized [us] at an early age.” - Gustav Lilienthal

8 Octave Chanute Railroad / civil engineer, then writer His 1894 book Progress in Flying Machines, surveyed experiments, devices, theories Adopted “Pratt truss” Chanute preferred findings to be shared so as to speed progress Was in contact with many experimenters. Visited with Langley, Santos-Dumont, Ferber, Huffaker, Herring, Maxim and others. Corresponded with Hargrave, Mouillard, Montgomery, Cabot, Zahm, Kress, Wenham, Moy, Pilcher, Means, Lilienthals, and others. Letters back and forth W Wright to Chanute Chanute to W Wright and continuing to 1910

9 Selected letters and contacts of Otto and Gustav Lilienthal (Schwipps, 1993) are with a similar cast of characters PersonLetters Means12 Chanute11 Dienstbach5 LangleyMet with, 1895 PilcherMet with, 1895 Correspondence of Lilenthals Last namePages Chanute49 Means35 Herring29 Langley24 G Lilienthal16 Wood15 Muellenhoff11 Dienstbach10 Cabot9 Maxim8 Corresponding with Referring to

10 References in histories of aviation Counted references to persons or institutions in the 11 books below, combined: Crouch’s A Dream of Wings (1981/2002) Dale’s Early Flying Machines (1992) Garber’s Wright Brothers and the Birth of Aviation (2005) Gibbs-Smith’s The Invention of the Aeroplane. (1966) Hallion’s Taking Flight (2003) Hoffman.Wings of Madness (2003 biog of Santos-Dumont) Jakab’s Visions of a Flying Machine (1990) Penrose’s An Ancient Air (biography of John Stringfellow) Randolph’s Before the Wrights flew: the story of Gustave Whitehead. (1966) Runge and Lukasch Erfinder Leben (2005) (biography of Lilienthal brothers) Shulman’s Unlocking the Sky (bio of Glenn Curtiss) Preliminary; almost all this is in English. Now up to 2000 persons referenced. Again the same names appear. Last namePages Wright443 Chanute303 Langley240 Curtiss198 Lilienthal177 Stringfellow117 Cayley103 Blériot98 Herring97 patents81 Smithsonian Institution75 Henson66 Bell65 Manly60 Zahm56 Maxim49 Ader47 Voisin45 Brearey44 Means44 Wenham44 Penaud43

11 Page references to institutions Page references distinct instances club, society, or association21937 periodicals, newspapers, magazines, journals13139 patents81 company7535 prize, trophy, award, contest, medal, meet, or exhibition 6718 book (fact or fiction)4721 university or school4619 lab, museum, institute, observatory, zoo, or fund4616 military institution457 conference142

12 Hundreds of fixed-wing flying machine patents were filed before [Data for Germany and U.S.: Simine Short and Otto-Lilienthal Museum] Patents To my knowledge no patents were licensed until the Wrights 1903/06 patent. Chanute, the Wrights, and aviation historians do not treat the patents and most of patent-filers as relevant to the main inventions. Claim: Intellectual property ownership was mostly irrelevant. Inference: the technology was too uncertain and immature for it to matter. The patent system exists in parallel to the network, but does not have traction.

13 Wright brothers as open-sourcers Wilbur and Orville Wright ran a bicycle shop. They read up on gliders and try flight experiments. Motivations: “I am an enthusiast... I wish to... add my mite to help on the future worker who will attain final success." -- Wilbur Wright, 1899 "At the beginning we had no thought of recovering what we were expending, which was not great..." -- Orville Wright, 1953 They published articles They spoke at conferences Chanute, others visited and stayed in contact

14 Wilbur Wright, May 1900 First letter to Chanute: “Assuming then that Lilienthal was correct... ” “... my object is to learn to what extent similar plans have been tested and found to be failures, and also to obtain such suggestions as your great knowledge and experience might enable you to give me. I make no secret of my plans [because] I believe no financial profit will accrue to the inventor of the first flying machine, and that only those who are willing to give as well as to receive suggestions can hope to link their names with the honor of its discovery. The problem is too great for one man alone and unaided to solve in secret.” “I intend to employ [an apparatus] similar to the "double-deck" machine with which the experiments of yourself and Mr. Herring were conducted in ” Most cited in index of Published Writings of the Wright Brothers (Jakab & Young, 2000) Personpages Lilienthal34 Langley29 Chanute24 Chanute’s reply: “I believe like yourself that no financial profit is to be expected from such investigations for a long while to come.”

15 Wright methods and inventions Wind tunnel with smooth air flow Tested many wings systematically Propeller invention: shaped like wings, with lift going forward This produces ~40% more pulling power. This design idea lasts to the present. They are skilled, precision-minded toolsmiths, in a workshop every day. They flew craft repeatedly as kites and gliders. No landing gear, no engine. Their piloting design had to be learned, like on bicycle

16 Wrights withdraw some from open source network Late 1902: they become more secretive, apparently because of wing design success 1903: They filed for a patent on their control mechanism for the wings. Late 1903: Powered glider flight. They held their patent rights tightly and enforce them. It has been suggested that this delayed overall growth by US producers. Wrights’ first powered, controlled fixed-wing flight Dec, 1903

17 Most of these make airplanes. Can include others -- engine and propeller makers, pilot schools, exhibition companies -- given time. None of founding manufacturers were aero navigation experts of the 1800s!

18 Parallels to open source software and user innovation Autonomous innovators (not hierarchy, not cult)... with various goals  Want to fly!  Hope for recognition, prestige, fame, maybe fortune  Curious, interested in the problem  Bring peace, or make own nation safer... who share technical info with international public  Intellectual property set aside Authors, evangelists, organizers have valuable role

19 More possible parallels Phase 1: Tinkerers worked in small groups ( )  Internal motivation. Not industrial motive.  Experimenters not like economic models of employees, managers, investors, consumers, social planners  need model of “tinkerers” Phase 2: Tinkerers networked more (1894 to 1909)  High interaction -- correspondence, sharing networking, visits.  Many open/shared designs.  Measurement: who’s involved? What’s written? To whom do inventors refer? To whom do historians refer? Who patented, how much, and were they cited?  Do these innovators evangelize, publish, and correspond?  Do they specialize, modularize, and standardize the technology? Phase 3: Commercialization (1909 and on)  The open-type innovators are not the ones who industrialize it.  Measurement of industry.

20 An explicit reference to the person’s name or quote from the person In a relevant book (11 so far; at least 15 to go) Text in main content, preface, forward, introduction, appendices, pictures, tables, and figures Table of Contents and indexes don’t count References to something named for the person count. (Should they?) Events after 1909 shouldn’t count (not done yet) Only events related to aircraft work should count (not done yet) On this view, biographies “over-refer” to the subject person sometimes they leave the subject person out of the index (!) Groups (brothers Wright, Lilienthal, Montgolfier, Tissandier, Voisin; likewise institutions or groups are referred to as groups and other times as individuals)  Counts are preliminary and can never be perfect What’s counted as a reference