Featured

Victor Coissac: A Forgotten Pioneer

Victor Coissac (1867–1941) had no scientific training. Born in Tulle (Corrèze) to a Catholic family, he was sent to Paris at fourteen to apprentice as a tailor, but took up adult-education courses instead, earned a teaching credential, and settled in Tours in 1889, teaching until 1922. Increasingly anticlerical and drawn to cooperative socialism, he developed his own theory of gradual social transformation, published in 1917 as La Réalisation du bonheur. From 1922 to 1935 he tried to put it into practice, founding the cooperative community l'Intégrale, first in Tours, later at Puch, Lot-et-Garonne.

In 1916, reasoning from Newtonian mechanics and conic-section geometry rather than fiction, Coissac wrote La Conquête de l'Espace as a technical case for interplanetary travel. He distanced it explicitly from Jules Verne, calling Verne a “prestigious novelist but insufficient astronomer.” The first edition opens with a dedication to Camille Flammarion, citing Flammarion's Terres du Ciel as a key influence.

The book went unnoticed in France for decades. Soviet historian Serguei Golotyuk found it by chance in 1987 while researching astronautics pioneer Ary Sternfeld, who had cited Coissac in his Initiation à la cosmonautique, written in manuscript in 1933 and published in a Russian edition in 1937. French engineer Jacques Villain learned of Coissac from a Russian contact in Moscow in 1990, which began the book's rediscovery in France. It was finally re-edited in France in 2017 (Nielrow éditions, Dijon).

Two Editions: What Changed

The 1916 edition bound two works together: L'Évolution des Mondes (13 chapters of cosmology and physics, pp. 1–151) followed by La Conquête de l'Espace (11 chapters plus appendix, pp. 151–261), preceded by the Flammarion dedication. The second edition (“deuxième édition, revue et augmentée”) drops L'Évolution des Mondes and the dedication, publishing La Conquête de l'Espace alone with a new descriptive subtitle and opening directly on the Préambule.

The astronautics chapters themselves are largely unchanged between editions: same chapter order, same illustrations (staged-rocket cutaway, amortisseur landing gear, lunar-trajectory diagram), simply renumbered from starting at p. 151 to starting at p. 13. Chapter I of the second edition does absorb some physics groundwork (radiative heat transfer, the vacuum-chamber discussion) that had previously lived in L'Évolution des Mondes, letting the astronautics text stand alone.

Other changes: the imprint moves from the Tours bookshop to “Groupe Morelly, à Puch (Lot-et-Garonne),” confirming the community's relocation. Price rises from 7 francs (1916) to 16 francs. The 1916 copy has an errata leaf; the second edition does not. The second edition's wrapper and title page carry no copyright page or printed year; its date, 1925, follows Ciancone's bibliography (55b) rather than anything printed in the book itself.

Propulsion and Staging

Coissac rejects Verne's cannon and any giant sling, settling on the rocket and noting that thrust works in vacuum, a point often confused in period writing. His launch vehicle is staged: a nested sequence of reservoirs (A–F), each holding a charge of solid composition fusante, consumed and jettisoned in turn so the vehicle sheds mass as it accelerates, with attention paid to keeping the center of gravity stable.

Two-Vehicle Architecture: The Command/Lander Split

Coissac describes a grand véhicule (mothership) staying in orbit while a petit véhicule (lander) detaches, descends, conducts surface excursions, and re-ascends to rendezvous with the orbiter, using optical tracking and worked relative-velocity numbers for the approach, a rough precursor to the Apollo command-module/lunar-module split.

Chapter VI treats satellisation and orbital insertion, parking in orbit before descent, as a deliberate technique decades before it became standard practice. Coissac itemizes velocity requirements for launch, ascent, satellisation, and desatellisation separately for voyages to Mercury, Venus, Mars, Jupiter, and Saturn: a genuine delta-v budget.

Lunar Transit and Mid-Course Correction

Coissac critiques Verne's Columbiad cannon-shot for its inability to correct trajectory mid-flight, and proposes tracking position against ephemerides during the voyage with velocity adjustments to correct arrival timing. His treatment of the Earth-Moon neutral point (~85,000 leagues out, requiring ~11,073 m/s to reach) uses real orbital mechanics.

Vehicle Engineering, Equipment, and Spacesuits

Chapter X specifies the hull (1mm steel skin on a welded frame, ~7.5 kg/m², aluminum offered as a lighter alternative), a double-hulled airlock (tambour) with hermetic doors and rubber gasketing, and a waste-ejection piston system later repurposed to correct unwanted vehicle rotation. The 32-item equipment manifest (inflatable bedding, ptomaine-absorbing chemicals, oxygen apparatus, spare glass, a hydrogen heating reservoir, a solar-concentrating mirror, precision instruments, spacesuits, bicycles, gymnastics equipment, signal beacons) is a complete outfitting list.

Chapter VIII details a pressurized scaphandre, breathing apparatus, and manometer-based atmosphere analysis before unsuited exit, plus compressed-gas bicycles and rocket-assisted jumps (“bonds”) for surface locomotion in low gravity.

Reentry, Landing, and the Amortisseur

Coissac derives terminal velocity through atmosphere from drag proportional to v², checks it against skydiving and artillery ballistics, and flags atmospheric friction heating on reentry as a real hazard.

His answer for the descent itself is built into the vehicle's shape. He deliberately makes the body cubic (Fig. 9) so that a hinged supplementary skin, normally folded flat against it, can unfold on arrival at a planet with atmosphere: unfolding automatically quintuples the vehicle's surface area under air pressure during the drop, turning the whole body into a crude parachute. Reinforcing devices keep the panels from deforming under the compressed gas the descent generates, except in a direct fall.

For the touchdown itself, the landing gear, the appareil amortisseur, uses four articulated rings at the vehicle's corners with cutting burins that bite into the ground on impact, designed to preserve orientation and absorb landing energy.

Conclusion: The Generation Ship

The closing chapter, unchanged between the 1916 and second editions, turns from the solar system to the stars. Coissac calculates the distance to Alpha Centauri (roughly three trillion kilometers) and, for distances beyond any near-term propulsion, proposes a vehicle large enough to hold several families, carrying its own soil, plants, and animals, self-sufficient across a voyage completed by later generations rather than the original travelers: a generation-ship concept, a dozen years before Tsiolkovsky's 1928 essay on the same idea.

The chapter's Sommaire states plainly that interstellar voyages “sont impossibles dans l'état actuel de la science, et le seront sans doute toujours” (are impossible in the current state of science, and doubtless always will be).

A Lecture, Transcribed and Printed Within Weeks

The title page tells most of the story on its own. This is Германские самолеты-снаряды (“German Aircraft-Missiles”), a stenographic transcript (“стенограмма”) of a lecture by engineer-lieutenant colonel V. F. Bolotnikov, Candidate of Technical Sciences, delivered on August 25, 1944. It was issued by the Lecture Bureau attached to the Committee for Higher School Affairs of the USSR Council of People’s Commissars (the forerunner of the later All-Union Znanie lecture network), printed at the Pravda press in Moscow, in a run of 20,000 copies, and marked “на правах рукописи”, “with the status of a manuscript,” the standard Soviet designation for material distributed for immediate public use rather than formal book publication.

In other words, this was disposable, of-the-moment print, meant to circulate through lecture halls and reading rooms and then be discarded, exactly the kind of ephemera that rarely survives eighty years intact. It carries a print-shop order number (“Заказ 2358”) and a paper-allocation code (“А5474”) on the final page, the small bureaucratic fingerprints of Soviet wartime publishing.

What makes the timeline worth pausing on is how current the content is. Bolotnikov’s opening section, “First Information” (Первые сведения), walks through the story almost as a news chronology: the June 13 attacks; the inaccurate early reports (some claimed the weapon was radio-guided, which turned out to be false); Britain’s official technical disclosure on June 20; the construction diagram that Krasnaya Zvezda itself printed on June 25; Churchill’s statement to the House of Commons, republished in the Soviet press on July 7; and finally Churchill’s updated casualty figures from his August 2 Commons address: 5,340 flying bombs launched against Britain, 4,735 killed, roughly 14,000 injured. Bolotnikov delivered his lecture just three weeks after that speech. This pamphlet isn’t retrospective history, it’s a Soviet engineer synthesizing Western press reporting into a technical briefing almost as fast as the news came in.

What the Lecture Actually Explains

Bolotnikov’s plan of the lecture, reproduced in full on an early page, moves through the hard engineering: the pulsejet engine, the autopilot, the warhead, and the airframe, before turning to launch technique, combat effectiveness, countermeasures, and a closing section asking, in the middle of the campaign, whether the weapon was a surprise.

The technical content holds up well. Bolotnikov gives the warhead’s explosive charge as roughly 900 kg, a figure close to the V-1’s actual ~850 kg Amatol payload; he correctly reports that the “radio control” rumors were false and that the internal transmitters some units carried had no receivers at all, serving only to help German observers track actual flight paths by triangulating periodic signal fixes, not to steer the weapon in flight. He walks through the layered, redundant fuzing system (electrical contact fuzes on the nose and belly, electro-inertial fuzes that fire on impact shock, and a mechanical clockwork fuze set for up to two hours’ delay as a final backup), and reconstructs the flight-weight breakdown, about 2,100 kg total, split roughly between warhead, fuel, engine, and structure, well enough to derive a plausible range of 220–260 km and a flight endurance of 25–30 minutes.

Borrowed Eyes: Western Reconnaissance Photos, Cyrillic Captions Around Them

The most quietly fascinating pages in the booklet are the ones Bolotnikov didn’t draw himself. To illustrate the launch sites and their camouflage, the pamphlet reproduces annotated aerial reconnaissance photographs straight out of the British press, English captions and all (“LAUNCHING RAMP CAMOUFLAGED INTO THE LAY-OUT OF A FRENCH VILLAGE,” “FIXED LAUNCHING POINT AT LONDON,” “PROJECTILE LEAVING RAMP”). Soviet typesetters simply pasted the Western photostat in whole, English text intact, and wrapped it in Russian captions and lecture prose. It is a small but vivid artifact of how Soviet technical intelligence in 1944 leaned openly on Allied press material, nothing clandestine about it, just a lecturer clipping the London papers to explain a live threat to a Moscow audience.

Bolotnikov is also candid about the weapon’s limits. He reports the V-1’s aiming error at roughly 4 km from a 1° sighting error alone, plus another 2 km of navigational drift from routine wind-estimation error over a 20-minute flight, for a combined probable error around 5 km. His conclusion is blunt: the weapon cannot hit a specific target and is only usable for area bombardment of a large city. He closes on message, crediting the Red Army’s westward advance with pushing the launch sites out of range and “neutralizing the enemy’s poisonous technology,” the expected patriotic coda for a 1944 Lecture Bureau publication, sitting right alongside genuinely competent engineering analysis.

Condition and Provenance

The copy is complete: 25 pages plus original printed wrappers, worn at the spine and corners but intact, with the expected toning of Soviet wartime pulp paper. The front cover carries a red-pencil mark, a loose scrawled flourish rather than a legible signature. Inside the back cover, a penciled “600” is almost certainly a dealer’s price notation from a past sale rather than anything original to the pamphlet. A directly comparable pamphlet, Битва за Белоруссию, the stenogram of a lecture by General-Lieutenant A. V. Sukhomlin delivered three weeks earlier in that same October Hall, issued by the same Lecture Bureau and printed at the same Pravda press, turns up in the Russian antiquarian trade, confirming this is a known, if scarce, genre of Soviet wartime ephemera rather than a unique survival.

Transcription and translation of the Russian text above are the collection’s own, drawn directly from the photographed pages of this copy.

A Dated Conversation with the Reader

Each volume opens with its own preface (Vorwort), and read together they form something close to a diary. Band I is signed “Solothurn, early October 1944” (Anfang Oktober 1944); Band II, “early December 1944” (Anfang Dezember 1944); Band III, “in February 1945” (im Februar 1945), roughly three months later. The prefaces even share a stock sentence about the war having pushed rocketry to the fore (in den Vordergrund), and the wording of that sentence changes between volumes: Bands I and II both cite “the war events of the year 1944” (die Kriegsereignisse des Jahres 1944), but by February, Band III has quietly updated it to “the war events of the years 1944 and 1945” (die Kriegsereignisse der Jahre 1944 und 1945). Stemmer was still revising his own framing as the calendar turned, a small detail, but a rare case of a wartime author’s text visibly catching up to the war in progress.

Watching Both Sides at Once

What sets Stemmer apart from his belligerent contemporaries is that he had no reason to pick a side, and it shows. Band II, The Rocket Weapons of the Second World War (Die Raketenwaffen des zweiten Weltkrieges), reads like a comparative intelligence briefing rather than propaganda from either camp. German Nebelwerfer batteries are set against the Soviet “Katiuschka,” which he can only describe by reputation, admitting outright that no technical details had reached him. British rocket-firing Typhoons are illustrated a few pages after the Luftwaffe rocket attacks on Allied bombers that provoked their development. A captured Panzerschreck, photographed in the hands of British soldiers, sits across the page from a captured German rocket-artillery trailer seized during the invasion of France. Even the jet engine survey in Band I ranges freely across Italian (Campini), British (Whittle, reproduced from his own 1935–36 patents), and German material without favoring any of them.

The V-1 section is the standout. Stemmer’s source for the definitive cutaway diagram of the weapon was an actual Allied intelligence leaflet, dropped, he notes, over Romanshorn in August 1944, presumably having drifted off course from a drop meant for German territory and landed on neutral Swiss soil instead. He reproduces it, then goes further, reverse-engineering the pulsejet’s internal valve mechanism himself and flagging where he suspects the popular press has it wrong. He quotes Churchill’s own casualty reports to Parliament nearly verbatim: 2,750 V-1s fired and 2,752 dead as of 6 July 1944, rising to 5,040 fired and 4,735 dead by 3 August, transcribing a live wartime news cycle into a technical manual as it happened.

An Engineer, Not a Journalist

Stemmer wasn’t simply compiling clippings. He built and flew wireless remote-control experiments of his own in Switzerland and writes candidly about where they failed. He calculates, from first principles, that a V-1-sized airframe with a genuine liquid-oxygen rocket motor could hit 4,300 km/h. He works through the physiology of high-g flight: pulse rates, blackout thresholds, a documented 17.3g briefly tolerated in a reclining test subject, material closer to aerospace medicine than wartime pamphleteering. And in Band II’s closing pages, having spent the volume almost entirely on weapons, he pivots to something almost wistful: a considered case, backed by exhaust-velocity math and a nod to Max Valier’s 1928 transatlantic rocket-plane project, that a Zurich to New York flight of thirty minutes to three hours lay within technical reach. “In times like these,” he writes, closing the volume, “the word ‘impossible’ must be used with great caution.”

The Set

This is a complete, matched first-edition run: Band I (Nr. 106, Rocket Travel, Rocket Flight / Raketenfahrt-Raketenflug, 1944), Band II (Nr. 107, The Rocket Weapons of the Second World War / Die Raketenwaffen des zweiten Weltkrieges, 1945), and Band III (Nr. 108, Rocket Flight Projects / Raketenflugprojekte, 1945), issued as part of the general-interest Hofmann-Bibliothek series out of Zurich.

Band I lays the groundwork across seven chapters: why aircraft needed a new kind of engine, the transition from powder rockets to recoil motors, the mathematics of rocket propulsion, rocket-powered ground vehicles, early powder-rocket flight tests, and finally the liquid-fuel rocket motor, the technology he clearly regarded as the field’s real future.

Band III turns outward. It surveys wartime rocket and space-flight projects nation by nation, French, Russian, American, German, Italian, English, Hungarian and Swedish work, a section candidly headed “individual, unverifiable works” (Einzelne, nicht kontrollierbare Arbeiten), Swiss work of its own, and a closing bibliography, compiled from open literature before the war had even ended.

Stemmer went on to found the Schweizerische Astronautische Arbeitsgemeinschaft (Swiss Astronautical Study Group) around 1950–51 and served as the International Astronautical Federation’s first Honorary Secretary from its founding in 1951, later helping organize its 4th congress in Zürich in 1953. The rocket engineer taking careful notes on a war he could observe but not join went on, within a few years, to help build the international body still governing astronautics today.

A Teenager, a Mortgage, and the Rio Grande

The scheme belonged, by most later accounts, to a teenager. Keith Rumbel, a 16-year-old with the unlikely combination of hobbies of stamp collecting and amateur rocketry, and later a Rice University chemistry scholar and MIT-trained government rocket scientist, proposed the idea to Loyal Service Post No. 37 of the American Legion in McAllen, which needed to pay off the mortgage on its new post building before Fourth of July dedication ceremonies. Rockets built from laminated cardboard and fiberboard, powered by fuel not much more sophisticated than fireworks powder, would carry mail across the river to Reynosa, Tamaulipas, and back. Collectors would buy the specially designed vignettes and first-day covers; the Legion would get its building paid off; and a small Texas border town would claim a footnote in the history of rocketry and postal history alike.

The first rocket did not survive contact with reality. It exploded roughly 100 feet into the air, scattering covers across the water and wounding a customs official with shrapnel. The second rocket flew true, true enough to sail 2,000 feet past the river and into the middle of Reynosa, where it made an unscheduled delivery to the wall of the U.S. Bar, sending patrons fleeing in the belief the roof was coming down. A third rocket found a small shack. Return flights across the border went more smoothly, though one rocket set a cornfield alight. By day’s end, something like 2,000 covers had crossed the border successfully, official flight documentation had been produced, and a small-town publicity stunt had become a permanent, minor landmark in the history of rocket mail.

The Rockets Themselves

The book’s own narrative gives a surprisingly technical account of the hardware. The rockets were about seven feet in length and twelve inches in circumference, carrying two separate mail compartments, one built into the nose and the other set just back of center to keep the rocket balanced in flight. Each rocket carried a loading of about 300 covers. They were powered by a fuel chosen for a high coefficient of expansion combined with combustion slow enough to avoid another mid-air explosion, while still building enough pressure to send the rocket across the river.

The design itself was the product of a group of sons of Legion members, who spent the better part of a year on the construction and, after the first rocket’s mid-flight failure, on refining it. Return-flight tests pushed for both accuracy and distance: rockets that had traveled a bit over 1,000 feet on the first attempt were, by the end of the day, landing accurately from as far as 3,000 feet away.

The Booklet That Wasn’t Written in 1936

Sometime after the event, though not, it turns out, in 1936, a leather-bound souvenir volume appeared: First International Rocket Air Mail Flight, From the United States of America to the United States of Mexico (and return), with a foreword by George W. Wentz, Jr. Its embossed cover, oddly, carries no image of a rocket at all, only an airplane banking over a stylized skyline, a covered wagon, and the arched title lettering. Inside, a narrative account of the flight sits alongside mounted specimens of the two triangular vignettes issued for the occasion, along with full uncut sheets of four, and, in some copies, genuine flown covers bearing period postage and cancellations.

Bibliographies conventionally date this booklet to 1936 and credit its authorship to “O. K. Rumbel,” presumably Keith’s father, Oliver Keith Rumbel, a Legion member. But the foreword itself gives the book away. Wentz writes of rockets “proving exceedingly successful” and invokes, admiringly, “the now famous ‘Bazooka’ gun that fires rockets.” The bazooka was first fielded in June 1942 and did not enter the public vocabulary until the war years that followed. Wentz goes on to describe “new rocket planes and rocket ships” and “countless rocket shells that are being developed,” language that belongs to the era of the V-1, V-2, and wartime rocket ordnance, not to 1936, when rocketry was still a matter of amateur experimentation and Sunday-supplement speculation.

A second detail sharpens the dating further. The foreword states that copies of the book were presented to “President Franklin D. Roosevelt,” to “President Cardenas of Mexico,” to the Smithsonian Institution, and to the State Museum of Austin, phrasing that treats Roosevelt as the sitting president at time of writing. Roosevelt died in April 1945. Taken together with the Bazooka reference, this places the book’s actual production somewhere in the narrow window of roughly 1943 to early 1945, a full seven to nine years after the event it commemorates. Wentz himself, a stamp dealer, is the only named party in the volume, and Keith Rumbel, the flight’s actual chairman and instigator, is never mentioned in the text at all.

What the Colophon Tells Us

The book’s closing note is unusually forthcoming for a philatelic souvenir. It carries a printed, not hand, signature block for Garland Adair (American Legion State Historian and Chairman of the Centennial Committee), W. J. Burris (Post Adjutant, Loyal Service Post), and Sr. José Rodríguez (Chief of Mexican Customs Service), part of the typeset page rather than an autograph, and states plainly:

“1000 sheets of 4 stamps were printed of the U.S.A.-Mexico Rocket stamps. 1000 sheets of 4 stamps were printed of the Mexico-U.S.A. Rocket stamps. After which all plates for the stamps and cachets were destroyed by the American Legion officials.”

That gives a firm print-run ceiling: 4,000 vignettes per direction, 8,000 total, with the printing plates and cachet dies deliberately destroyed once the run was complete, a detail that itself likely fed the vignettes’ collectibility in the years that followed. The narrative text elsewhere in the book adds that only 51 covers were recovered, in damaged form, from the rocket that exploded mid-flight, each marked “Damaged by Rocket Explosion 4:10 P.M. July 2, 1936” before being posted along with the rest of the flight’s mail, a documented sub-variety for anyone chasing the full range of surviving material from the event.

Two Copies, One Text, Different Contents

Comparing two copies side by side turns up something that a single copy alone would not reveal: the printed text block is identical between copies, but the philatelic material bound into each one is not.

Copy #1 contains, in addition to the standard mounted vignette specimens and uncut sheets of four, two genuine flown covers, one each direction, bearing actual period postage (a Mexican 40-centavo airmail stamp cancelled at Reynosa, Tam.; a U.S. 16-cent airmail stamp cancelled at McAllen, Texas) with period cancellations dated July 2, 1936, and the vignettes used as cachets rather than as loose specimens. This is postal history in the fullest sense: evidence the item actually traveled by rocket, not merely a souvenir manufactured around the event years later.

Copy #2, by contrast, contains only mounted specimens and uncut sheets, no flown covers. Its printed text, foreword, production narrative, and closing colophon are word-for-word identical to Copy #1’s. The implication is that this “limited edition” was not printed as a fixed, uniform object in the way a conventional book is. Rather, the shared, mass-produced text block was assembled with whatever philatelic material remained available to whoever bound each individual copy, likely drawing on Wentz’s own dealer stock. Two copies of “the same book,” in other words, are not equally rare, equally complete, or equally valuable, and any serious cataloging of this title should treat each copy as an individual assemblage rather than assume uniformity from a shared title page and foreword.

The Three Copies

Two 1946 states plus one 1950 translation. The violet edge marks the Soviet copy.

The Stam and McGraw-Hill issues are the blue- and black-cloth binding states recorded by Ciancone (#116), with no established priority. Both are printed from the same Dutch sheets; the McGraw-Hill copy simply carries a different imprint and a hand-applied origin correction.

The 1946 Edition: Origins and Imprints

The preface tells the origin story in the authors’ own frame. Kooy, of the Aeronautical School at The Hague, began a theoretical thesis on projectile and rocket dynamics during the war; the occupation and postwar publishing difficulties delayed it. The copyright notice reads identically in both issues, the drawings of the V-weapons “are based on measurements made by the authors” and are held under copyright, confirming the engineering figures as original measured work rather than reproductions of captured German documents. But the two examples are set differently: the Stam copy’s line runs “Copyright by The Technical Publishing Cy. H. Stam, Haarlem-Holland.” The company’s English name, with no year. The McGraw-Hill copy’s line runs “Copyright 1946 by De Technische Uitgeverij H. Stam, Haarlem-Holland.” The Dutch company name, dated 1946. Same rights-holder, two settings: English and undated on the Continental issue, Dutch and dated on the export issue.

The book was printed in the Netherlands — by N.V. Van de Garde & Co’s Drukkerij at Zaltbommel — published by H. Stam of Haarlem, and co-issued for the New York/London market by McGraw-Hill. Printer, publisher, and co-issuing imprint are three distinct parties: the sheets were manufactured in Holland whatever imprint they carried. The Stam copy names its Dutch printer on the leaf facing the title page and carries the clean H. Stam imprint. The McGraw-Hill copy omits the printer line altogether; in its place, at the foot of the imprint, a printed “Printed in England” line has been over-stamped by hand with “MADE IN HOLLAND” — an origin correction asserting the sheets’ true place of manufacture, with the stamp’s ink offset onto the facing blank page.

The 1950 Soviet Edition: Abridged and Reframed

The Soviet edition is not a straight translation. Kosmodemyansky’s editor’s preface states plainly that the book contains no fundamentally new discoveries and is essentially a summing-up of the technical results of Germany’s long-range bombardment of London. He documents the editorial surgery: the first five chapters of the Dutch edition — vector calculus, analytical mechanics, and numerical integration — were dropped, on the grounds that good Russian-language treatments already existed; the gyroscope and artillery-ballistics chapters were kept because the later rocket chapters depend on them. Because chapters were removed, the chapter numbering was changed. The Dutch transcription of place-names was preserved on the maps to allow cross-referencing with other sources.

The preface also carries an explicit priority polemic. Kosmodemyansky opens by asserting the leading Russian role — Tsiolkovsky, Tsander, Kondratyuk — with footnotes to their 1947 Oborongiz reprints, and charges the authors with bad faith “typical of bourgeois literature” for downplaying Russian priority, citing Tsiolkovsky’s 1913 supplement rather than his foundational 1903 paper and omitting Meshchersky (1897).

Collation of this copy: signed to press 11 January 1950; 20½ printed sheets plus 3 inserts; 19.03 author-sheets; format 60×92/16; price 18 rubles; order 575/1259; printed at the Oborongiz typography; editor M.S. Rumyantseva, technical editor N.N. Piskareva. Text runs to roughly 324 pages against the 1946 edition’s 472 — consistent with dropping five chapters.

How the Illustrations Travel

The 1946 edition gathers eleven fold-outs at the rear: eight large technical plates and three folded maps. Rear placement of oversized plates is a bindery convenience — separate stock is cheaper to insert as one gathered group than to tip in throughout the text — and says nothing about authorial intent; the figure numbering runs continuously through text and plates alike.

The Soviet edition handles the two kinds of fold-out differently, and the split is instructive. It retained all three geographic maps as fold-out inserts (the colophon’s “3 inserts”: The Hague at 1:40,000, Holland at 1:2,000,000, and the Hellendoorn district at 1:20,000 with V-1/V-2 sites marked). But it reformatted the eight large technical plates into ordinary in-text figures, printed sideways where the page could not otherwise hold them.

The two editions also place their fold-outs differently, and this is the sharper distinction. The 1946 editions gather every fold-out at the rear of the volume. The Soviet edition instead tips its inserts in at their points of reference: each of the three maps sits near the passage it illustrates, and the one large technical fold-out it retained (the V-1 schematic) is bound in exactly where the text calls for it. Throughout, the original figure numbers are retained. The photographic figures show a coarser halftone screen than the surrounding line work — consistent with re-screening printed plates from a copy of the original rather than working from photographic sources.

What the Soviet Edition Leaves Out

Both English copies open with a pictorial frontispiece and both close, at p. 467, with the authors’ Conclusion and a small two-color device, a red circle enclosing a black cross, printed on the text page depicting the marker painted around the Wassenaar launch sites and the motto beneath it, In hoc signo vinces.

The Soviet edition drops both. The frontispiece is gone and the Conclusion sat among the material trimmed in translation, taking the colored device with it. The literary frame that bracketed the 1946 book is absent from the 1950 edition, which begins instead with Kosmodemyansky’s priority polemic.

Marks of Use: Three Annotators

Each copy was worked by a different hand. The Stam copy carries a tipped-in dossier assembled by its owner: hand-drawn sheets on Sänger’s supersonic-profile aerodynamics, comparative propellant-tank schematics of the VfR Mirak and ARS Repulsor, a drag table, a propellant chart, and a V-1/V-2 production-and-expenditure tally—plus three color launch photographs, dated March 1947, laid into the preface. The McGraw-Hill copy has a separate printed errata page annotated by the previous owner. The Soviet copy shows blue and red underlining; its purple library stamp records a private Soviet collection naming three owners, recorded here as provenance.

Carl Anderson: A Physicist at War

Carl Anderson is Carl David Anderson: the Caltech physicist who discovered the positron in 1932 and shared the 1936 Nobel Prize in Physics for it, and who two years later, with his student Seth Neddermeyer, identified the particle that became known as the muon. When the war came, Anderson set that work aside and went into ordnance. By his own account, decades later, he was put in charge of adapting rockets, larger ones than the standard infantry types, for use on aircraft, which is precisely the subject of this volume.

The book’s own acknowledgements page confirms it in period language: Anderson “acted as supervisor” of the Aircraft Launcher Group under Contract OEMsr-418, directing a research staff of more than twenty. He wasn’t the sole author, either. William R. Smythe, the Caltech electromagnetism theorist whose textbook trained generations of physics graduate students, wrote Chapter 5 outright, and Leverett Davis, Jr. contributed several sections of Chapter 3. The “restricted” title page conceals not one but a small cluster of serious Caltech physicists, with a Nobel laureate running the project.

Section H: Caltech’s Other Rocket Program

The contract number tells its own story. OEMsr-418 was not the Guggenheim Aeronautical Laboratory’s better-known rocket program, the von Kármán–Malina–Parsons group that became the Jet Propulsion Laboratory. It was a separate Caltech effort, organized as Section H (later redesignated Section L) of Division 3 of the National Defense Research Committee, under the Office of Scientific Research and Development. Its founder was Charles C. Lauritsen, a Kellogg Radiation Laboratory physicist who had been working on proximity fuzes for the Navy before deciding, in September 1941, three months before Pearl Harbor, that the deeper problem was the rockets themselves, not their fuzing. He built a Caltech-based rocket ordnance program almost from scratch, drawing his core team from the Kellogg physics group: William Fowler, Bruce Sage, Ralph Smythe, Frederick Lindvall, Ira Bowen, and Anderson, with Earnest Watson handling administration. Over the course of the war this project designed and helped manufacture a lineage of aircraft and ship-launched rockets, including what became the HVAR and, eventually, Tiny Tim.

This report is a direct product of that effort. The DTIC catalog of OSRD Division 3 rocket-ordnance reports lists it as entry #1242, Firing of rockets from aircraft; launchers, sights, flight tests, with an origin date of August 1943 and a supplement that September, folded into a “final report” issued under OSRD 2549 in 1946. That gap between wartime origin and postwar compilation is typical of OSRD final reports, many of which were assembled and formally issued only after the program’s work was substantially complete.

The Illustration Program

The illustration program is more ambitious than the plain binding suggests. The 138 pages carry several distinct kinds of photographic and diagrammatic evidence rather than routine ordnance snapshots. Sequential launch photography tracks individual rockets separating from the airframe across consecutive exposures: an 11.75-inch aircraft rocket dropping clear of an F6F Hellcat, frame by frame. Most striking is a sequence of high-speed photographs, taken at 1,500 frames per second, documenting blast-induced fabric and rib damage to an SB2C elevator during test firing, with reference lines painted on the control surface to measure distortion under load.

Six Aircraft, Three Calibers

Coverage extends across at least six aircraft types (F6F, F4U, P-38L, PBY-5/5A, TBF, SB2C) and three rocket calibers (7.2-inch VAR, 11.75-inch AR, 5.0-inch HVAR), including retro-launcher installations on the TBF, ripple-salvo firing from the PBY-5A flying boat, and a tree-launcher fit of the 5.0-inch HVAR under a P-38L’s wing.

Computing the Sight

Paired with the ballistic sighting diagrams elsewhere in the volume, the report reads less like a parts manual and more like an applied physics investigation of a weapons system, which tracks with having a cloud-chamber experimentalist overseeing its documentation.

A rocket stays airborne for several times as long as a bullet fired at the same target, so wind drift and target motion throw off the aim proportionally more, the reason Anderson’s group needed a computing sight rather than an adapted gunsight. The four panels of Fig. 3(3) lay the problem out plainly: a stationary target in a crosswind, a moving target with no wind, and a moving target with the wind first helping and then working against it. Each case shifts the aiming point differently, exactly the kind of variable a sight built for bullets had no way to absorb. The schematic in Fig. 4(3), from the chapter on the CIT Type 3 Sight, shows the electromechanical solution: a voltage-balancing servo converting the sighting computation into the mechanical displacement of the reflector plate in the sight head.

Training for the Andes, 1915

Bradley and Zuloaga had spent the previous year setting themselves up for the attempt. Over 1915 they took the South American records for altitude (reaching just over 7,000 meters), duration (28 hours aloft), and distance, flying the same balloon across the border into Brazil. Zuloaga’s own later accounts of that year differ on some particulars, among them which city anchored the distance flight; this feature follows the figures given in Zuloaga’s books rather than reconcile them. What is consistent across every account is that the 1915 flights were explicitly framed, at the time, as training for the Andes.

In Chile the 1916 crossing was celebrated as a joint achievement. Bradley himself credited the Aero Club de Chile and its meteorological institute for their assistance, and cast the flight as something that united, rather than divided, the two countries on either side of the cordillera. The Chilean government later decorated Bradley and Zuloaga with its Medalla al Mérito, First Class, a plate of which appears bound into the Travesía volume.

Two Books, Two Vantage Points

Bradley wrote his account the year after the flight, and it reads like one: La Travesía de los Andes en Globo moves through the meteorological study, the training flights, and the technical preparation before its final chapter narrates the crossing itself, illustrated throughout with Bradley’s own diagrams, a fold-out map of the route across the cordillera, and a profile chart plotting the balloon’s altitude against the peaks it cleared. Secondary sources describe the book as extremely scarce, with no later printing or reissue ever located.

Zuloaga came to the subject three decades later and from the institutional side. La Victoria de las Alas is framed as a documented chronicle of Argentine aviation history, and its title page identifies its author by his 1948 rank, Brigadier of the Fuerza Aérea Argentina. Institutional distance falls away in the book’s own account of the Andes crossing (pp. 102–109), where Zuloaga writes in the first person, in some detail, down to the barometric readings and the shout of “Adios, cabezas duras” from the ground crew as the balloon lifted off. Bradley’s diary and Zuloaga’s chronicle turn out to tell the same flight from opposite formal registers, but both, in the end, in Zuloaga’s case at least, from the inside.

A third book carries the story further still. Líneas Aéreas y Nacimiento de la Astronáutica en la Argentina, published in 1969 under Zuloaga’s later rank of Brigadier General, retells the 1915 and 1916 flights once more as part of a longer arc running from balloon aviation into Argentina’s entry into the space age. This copy carries penciled brackets around the passage recounting the 1915 record flights, marking out the same material this feature draws on.

A Presentation Copy: Zuloaga to the Sanfuentes Family

This copy of La Victoria de las Alas carries a two-hand inscription on its half-title. The first, in Zuloaga’s own hand:

“A la virtuosa dama chilena doña Matilde de la Fuente de Sanfuentes, ejemplar esposa y madre incomparable, en testimonio de admiración y amistad. Ángel María Zuloaga. Machalí, marzo de 1953. (Chile).”

Beneath it, in a second hand, presumably Matilde’s own, gifting the book onward to a descendant:

“Con el recuerdo cariñoso de tu vieja abuelita. Matilde de la F. de Sanfuentes.”

The dedicatee, Matilde de la Fuente de Sanfuentes, belonged to the family that owned Machalí, the hacienda near Rancagua named in Zuloaga’s inscription, and it was there, as a guest on the estate, that he wrote it. Read together, the two inscriptions document something more specific than a routine presentation copy: a personal friendship between Zuloaga and the Sanfuentes family that outlasted the flight that made him famous by nearly forty years, tied to a working estate rather than a ceremonial occasion.

Bibliographic Notes

The three copies of La Travesía de los Andes en Globo in the collection are textually and physically identical, differing only in condition.

La Victoria de las Alas is printed in color throughout. The colophon leaf carries a printed vignette of a hot air balloon over clouds, signed “Rostán,” on the same leaf recording the book’s completion: “Se acabó de imprimir este libro el dia 5 de marzo de 1948.”

Líneas Aéreas closes with its own colophon, in the same convention: “Este libro se terminó de imprimir en Artes Gráficas Bartolomé U. Chiesino S.A., Ameghino 838, Avellaneda, Buenos Aires, el día 6 de marzo de 1969.” Zuloaga’s two books were finished at the printer, by his own account, a day apart on the calendar, twenty-one years apart in fact: March 5, 1948, and March 6, 1969.