#ResearchResources – Recent Articles and Books (March 2021)

#ResearchResources – Recent Articles and Books (March 2021)

Editorial note: In this series, From Balloons to Drones highlights research resources available to researchers. Contributions range from discussions of research at various archival repositories to highlighting new publications. As part of this series, we are bringing you a monthly precis of recent articles and books published in air power history. This precis will not be exhaustive but will highlight new works published in the preceding month. Publication dates may vary around the globe and are based on those provided on the publisher’s websites. If you would like to contribute to the series, please contact our Editor-in-Chief, Dr Ross Mahoney, at airpowerstudies@gmail.com or via our contact page here.

Articles

Jan M. Waga and Maria Fajer, ‘The Heritage of the Second World War: Bombing in the Forests and Wetlands of the Koźle Basin,’ Antiquity, 2021, pp. 1–18, doi:10.15184/aqy.2020.154.

The Koźle Basin in Poland was radically transformed by aerial bombardment during the Second World War. Today, the region has approximately 6000 well-preserved bomb craters with diameters ranging from 5–15m and depths often exceeding 2m. Combining remote-sensing data and fieldwork with historical accounts, this article analyses these craters, demonstrating that their varied morphologies derive from the weight of the bombs that created them, and on the type and moisture content of the soil on which the bombs fell. Based on their results, the authors issue a call for the official protection of the Koźle landscape, which has particular historical, educational and ecological value.

Books

Krzysztof Dabrowski, Tsar Bomba: Live Testing of Soviet Nuclear Bombs, 1949-1962 (Warwick: Helion and Company, 2021).

On 30 October 1961, the Union of Soviet Socialist Republics (USSR/Soviet Union) conducted a live test of the most powerful nuclear weapon ever created. Codenamed ‘Ivan’, and known in the West as the ‘Tsar Bomba’, the RDS-202 hydrogen bomb was detonated at the Sukhoy Nos cape of Severny Island, Novaya Zemla archipelago, in the Barents Sea.

The Tsar Bomba unleashed about 58 megatons of TNT, creating a 8-kilometre/5-mile-wide fireball and then a mushroom that peaked at an altitude of 95 kilometres (59 miles). The shockwave created by the RDS-202 eradicated a village 55 kilometres (34 miles) from ground zero, caused widespread damage to nature to a radius of dozens of kilometres further away, and created a heat wave felt as far as 270 kilometres (170 miles) distant. And still, this was just one of 45 tests of nuclear weapons conducted in the USSR in October 1961 alone.

Between 1949 and 1962, the Soviets set off 214 nuclear bombs in the open air. Dozens of these were released from aircraft operated by specialised test units. Equipped with the full range of bombers – from the Tupolev Tu-4, Tupolev Tu-16, to the gigantic Tu-95 – the units in question were staffed by men colloquially known as the ‘deaf-and-dumb’: people sworn to utmost secrecy, living and serving in isolation from the rest of the world. Frequently operating at the edge of the envelope of their specially modified machines while test-releasing weapons with unimaginable destructive potential, several of them only narrowly avoided catastrophe.

Richly illustrated with authentic photographs and custom-drawn colour profiles, Tsar Bomba is the story of the aircrews involved and their aircraft, all of which were carefully hidden not only by the Iron Curtain, but by a thick veil of secrecy for more than half a century.

Ken Delve, How the RAF and USAAF Beat the Luftwaffe (Barnsley: Greenhill Books, 2021).

“The Luftwaffe had to be used in a decisive way in the Battle of Britain as a means of conducting total air war. Its size, technical equipment and the means at its disposal precluded the Luftwaffe from fulfilling this mission.” Adolf Galland

How did the RAF beat the Luftwaffe during the Second World War? Was it actually the fact that they did not lose which later enabled them to claim victory – a victory that would have been impossible without the participation of the Americans from early 1943?

This groundbreaking study looks at the main campaigns in which the RAF – and later the Allies – faced the Luftwaffe. Critically acclaimed writer Ken Delve argues that by the latter part of 1942 the Luftwaffe was no longer a decisive strategic or even tactical weapon.

The Luftwaffe was remarkably resilient, but it was on a continual slide to ultimate destruction. Its demise is deconstructed according to defective strategic planning from the inception of the Luftwaffe; its failure to provide decisive results over Britain in 1940 and over the Mediterranean and Desert in 1941–1942; and its failure to defend the Reich and the occupied countries against the RAF and, later, combined Allied bomber offensive.

Delve studies numerous aspects to these failures, from equipment (aircraft and weapons) to tactics, leadership (political and military), logistics, morale and others.

Bojan Dimitrijevic, Operation DELIBERATE FORCE: Air War over Bosnia and Herzegovina, 1992-1995 (Warwick: Helion and Company, 2021).

Operation Deliberate Force describes the air war fought over the former Yugoslav Republic of Bosnia and Herzegovina in 1992-1995.

Based on extensive research and with the help of participants, the first part of this book provides a detailed reconstruction of the emergence of three local air forces in 1992; the emergence of the air force of the self-proclaimed Serbian Krajina in Croatia, the Croat Air Force, the Bosnian Muslim air force, and their combat operations in 1992-1995.

In reaction to the resulting air war, in 1992 the United Nations declared a no-fly zone over Bosnia and Herzegovina. Codenamed Operation Deny Flight, the resulting military operations culminated in the summer of 1995, when NATO launched Operation Deliberate Force against the Serbian forces – and which forms the centrepiece of this story.

Operation Deliberate Force was NATO’s first active military operation, yet to date it has only been covered from the Western point of view: this volume is the first authoritative account providing details and analysis from both sides – that of NATO and of the Serbs. For example, it remains essentially unknown that the local Serbian air force continued flying strikes almost a month after Operation Deliberate Force was over, as late as of mid-October 1995.

Untangling an exceptionally complex conflict, Operation Deliberate Force is illustrated with a blend of exclusive photography from local sources and from official sources in the West. As such it is a unique source of reference about the air war fought in the centre of Europe during the mid-1990s.

Dimitry Khazanov, Air Battles over Hungary, 1944-45 (Warwick: Helion and Company, 2021).

Air Battles over Hungary 1944-45 is dedicated to the fighting over Hungary during the course of the Debrecen (6 October – 27 October 1944) and Budapest (29 October 1944 – 13 February 1945) offensives, as well as the Balaton Defensive Operation (6 – 15 March 1945), which the Red Army carried out from autumn 1944 until the spring of 1945. The conduct of these operations preceded an attempt by the Regent of Budapest, Miklos Horthy, to pull his country out of the war. This attempt however was unsuccessful – Vice Admiral Horthy was replaced under Hitler’s orders by the pro-Nazi henchman Szalasi, after which fierce and desperate battles broke out both on the ground and in the air. 

The Red Army Air Force enjoying numerical superiority, the quality of Soviet aircraft and high level of aircrew training having improved signifcantly by the time of the fighting. Conversely, it appeared there were almost no air aces left in the ranks of the Luftwaffe. Thus it appeared Soviet airmen would have no difficulty securing a victory. This, however, was not the case. Erich Hartmann, Hans-Ulrich Rudel, Gerhard Barkhorn, and many others fought here. Amongst the Hungarians the highest scoring ace, Dezso Szentgyorgyi, stood out, as did the outstanding Aladar de Heppes. Amongst their Soviet opponents were Kirill Yevstigneyev, Grigoriy Sivkov, Aleksandr Koldunov, Nikolai Skomorokhov, and Georgiy Beregovoy.

The fact that from time to time the aerial combat took place directly over Budapest – one of the most beautiful cities in Europe – could be considered a distinguishing feature of this fighting. Bristling with anti-aircraft artillery, Budapest was frequently subjected to bombing raids, and from the end of December to the beginning of January, certain areas in the Hungarian capital were transformed into improvised airfields and landing strips for German and Hungarian transport aircraft and gliders. Despite all the efforts to set up an air bridge, the German high command never succeeded in achieving this. This forced the besieged to attempt a breakout, after which the remaining garrison surrendered. The subsequent long drawn out battle near Lake Balaton ended in the ultimate defeat of the German troops, and their allies.

Michael Napier, Korean Air War: Sabres, MiGs and Meteors, 1950-53 (Oxford: Osprey Publishing, 2021).

Often overlooked, the time is now right for a new account of the Korean War (1950-53) given recent political events and, in particular, the aerial aspect. With a paucity of major accounts that go beyond one side or aspect of the conflict, Michael Napier has written this meticulously-researched new volume. The war proved a technological watershed as the piston-engined aircraft of WW2 seceded to the jet aircraft of modern times, establishing tactics and doctrine that are still valid today.

This wide-ranging study covers the parts played by the forces of North Korea, China, the former Soviet Union, the US, the UK, Australia, Canada and South Africa in a volume rich with combat reports and first-person accounts. This lavishly illustrated hardback will appeal to aviation enthusiasts and those with a fascination for the Korean War as we enter the 70th anniversary of the conflict.

Amaru Tincopa, Air Wars Between Ecuador and Peru: Volume 3 (Warwick: Helion and Company, 2021).

The series of sharp clashes between Ecuador and Peru of 1981 left the dispute between the two countries unresolved as there was still no definitive delimitation of the border. During the following years, both parties had to deal with a series of internal and external issues and, ultimately, these affected the planning and operational capabilities of their respective armed forces. While Peru underwent a severe economic crisis including hyperinflation caused by poor management of its economy, and a leftist insurgency, Ecuador underwent a transition from a centrally-controlled economy to a free market: in turn, it was one of countries in Latin America least affected by the precipitous fall in regional economic indices of the 1990s. These factors had an immediate impact upon the armed forces of both countries: they proved decisive for the development of their defensive and offensive planning, and would exercise direct influence upon the decisions taken by field commanders of both countries during the final, third war between Ecuador and Peru in 1995.

Drawing upon extensive research in the official archives from both the Fuerza Aérea del Ecuador and Fuerza Aérea del Perú (FAP), with documentation from multiple private sources in both countries, Air Wars Between Ecuador and Peru Volume 3 completes the history of the aerial operations launched by the forces of both nations in the brief – but also the most violent – engagement between these two countries.

By accessing details from both parties to the conflict, this volume avoids biased and one-sided coverage of the conflict, while providing detail of the military build-up, capabilities and intentions of both of the air forces involved, their training, planning, and the conduct of combat operations.

Illustrated by nearly 200 exclusive photographs, maps and 15 authentic colour profiles, Air Wars Between Ecuador and Peru Volume 3 provides the first authoritative account of the air warfare between Ecuador and Peru in early 1995.

Wolfgang W.E. Samuel, Flights from Fassberg: How a German Town Built for War Became a Beacon of Peace (Jackson, MS: University Press of Mississippi, 2021).

Wolfgang W. E. Samuel, Colonel, US Air Force (Ret.), interweaves his story and that of his family with the larger history of World War II and the postwar world through a moving recollection and exploration of Fassberg, a small town in Germany few have heard of and fewer remember. Created in 1933 by the Hitler regime to train German aircrews, Fassberg hosted Samuel’s father in 1944–45 as an officer in the German air force. As fate and Germany’s collapse chased young Wolfgang, Fassberg later became his home as a postwar refugee, frightened, traumatized, hungry, and cold.

Built for war, Fassberg made its next mark as a harbinger of the new Cold War, serving as one of the operating bases for Allied aircraft during the Berlin Airlift in 1948. With the end of the Berlin Crisis, the airbase and town faced a dire future. When the Royal Air Force declared the airbase surplus to its needs, it also signed the place’s death warrant, yet increasing Cold War tensions salvaged both base and town. Fassberg transformed again, this time into a forward operating base for NATO aircraft, including a fighter flown by Samuel’s son.

Both personal revelation and world history, replete with tales from pilots, mechanics, and all those whose lives intersected there, Flights from Fassberg provides context to the Berlin Airlift and its strategic impact, the development of NATO, and the establishment of the West German nation. The little town built for war survived to serve as a refuge for a lasting peace.

Rick Tollini, Call-Sign KLUSO: An American Fighter Pilot in Mr. Reagan’s Air Force (Havertown, PA: Casemate Publishers, 2021).

Eagle pilot Rick “Kluso” Tollini’s life has embodied childhood dreams and the reality of what the American experience could produce. In his memoir, Call Sign KLUSO, Rick puts the fraught minutes above the Iraqi desert that made him an ace into the context of a full life; exploring how he came to be flying a F-15C in Desert Storm, and how that day became a pivotal moment in his life.

Rick’s first experience of flying was in a Piper PA-18 over 1960s’ California as a small boy, and his love of flying through his teenage years was fostered by his pilot father, eventually blossoming into a decision to join the Air Force as a pilot in his late twenties. Having trained to fly jets he was assigned to fly the F-15 Eagle with the “Dirty Dozen,” the 12th Tactical Fighter Squadron, at Kadena AB, Japan before returning Stateside to the 58th Tactical Fighter Squadron “The Gorillas.” Throughout training, Reagan’s fighter pilots expected to face the Soviet Union, but Rick’s first combat deployment was Desert Storm. He recounts the planning, the preparation, and the missions, the life of a fighter pilot in a combat zone and the reality of combat. Rick’s aerial victory was one of 16 accumulated by the Gorillas, the most by any squadron during Desert Storm.

Returning from the combat skies of Iraq, Rick continued a successful fulfilling Air Force career until, struggling to make sense of his life, he turned to Buddhism. His practice led him to leave the Air Force, to find a new vocation, and to finally come to terms with shooting down that MiG-25 Foxbat in the desert all those years before. Most importantly, he came to a deeper understanding of the importance of our shared humanity.

Cold War Nuclear-Powered Aircraft: A Step Too Far

Cold War Nuclear-Powered Aircraft: A Step Too Far

By Dr Peter Layton[1]

Birds and aircraft have a fundamental problem: their range and endurance are limited. To remain aloft requires the expenditure of energy. Eventually, birds must land and rest, and aircraft must refuel. The invention of nuclear power in the 1940s appeared to offer a way to cut this Gordian knot. A nuclear-powered aircraft could, it seemed, provide dramatically improved range and endurance compared to chemically fuelled powered aircraft.

Such ambitions were strengthened as the Cold War between the US and the USSR worsened. The Cold War released immense funding for military purposes while providing an operational rationale: a requirement for very long-range bombers able to strike military-industrial complexes deep in the Soviet heartland. The generous funding now available meant numerous new high technology possibilities could be considered, built, trialled and if successful enter mass production. An obvious candidate to research and investigate seemed nuclear-powered aircraft.

The original ideas about using nuclear power for aircraft propulsion had appeared around 1944. These led to a minor research program, the Nuclear Energy for the Propulsion of Aircraft study, beginning in mid-1946. Undertaken by Fairchild, this examined reactor technologies and engine transfer systems. These studies proved encouraging and so in 1951, with the Cold War deepening, the United States Air Force (USAF) proposed to begin actively developing manned aircraft nuclear propulsion. Contracts were let for three main elements: two X-6 prototype test aircraft, a nuclear propulsion system (reactor and turbojets) and an NB-36H reactor flight-test aircraft.

NB-36H_with_B-50,_1955_-_DF-SC-83-09332
An air-to-air view of the Convair NB-36H Peacemaker experimental aircraft and a Boeing B-50 Superfortress chase plane during research and development taking place at the Convair plant at Forth Worth, Texas. This plane was called the Nuclear Test Aircraft (NTA) and was redesignated XB-36H, then NB-36H. The NTA completed 47 test flights and 215 hours of flight time (during 89 of which the reactor was operated) between July 1955 and March 1957 over New Mexico and Texas. (Source: Wikimedia)

Convair received the X-6 contract. The aircraft was envisaged as being of comparable size to the company’s B-36 Peacemaker bomber with a length of 50m, a wingspan of 70m and an empty weight of some 100 tonnes. The X-6 was planned to have 12 turbojets; eight conventionally fuelled used for take-off and landing, and four nuclear-powered used during in-flight trials. This was an ambitious but expensive test program and was cancelled by the incoming Eisenhower administration in 1953 on budgetary grounds. However, the other two elements continued.[2]

General Electric was awarded the propulsion contract, progressively developing across 1955-1961 three direct-cycle nuclear power plants under the ground-based Heat Transfer Reactor Experiment (HTRE) test-rig program. The final HTRE-3 propulsion system featured a solid moderator using lightweight hybrided (sic) zirconium instead of water, a horizontal reactor to meet aircraft carriage requirements and produced sufficient heat to power two X-39-5 (modified J-47) turbojets simultaneously. HTRE-3 had several firsts including demonstrating an all-nuclear turbojet start, having a primary shield able to handle radiation levels expected in flight and in being designed for in-flight stresses, air pressures, temperatures, and G loadings.[3]

The third element was to flight test a reactor. In mid-1952, Convair was contracted to modify two B-36 aircraft: one for a ground test, the other for flight test and designated as the NB-36H. The major modifications involved firstly, the crew compartment and avionic cabin being replaced by an 11-tonne nose section lined with lead and rubber to protect against reactor radiation and secondly, the rear internal bomb bay being altered to allow fitment of the 16-tonne reactor. Less apparent were the cockpit glass transparencies being some 30cm thick and nine water-filled shield tanks in the fuselage to absorb any escaping radiation.[4]

In the meantime, the USAF was firming up its requirements. In March 1955, General Operational Requirement (GOR) No. 81 was issued seeking a nuclear-powered weapon system, WS-125A. Aspirations included a range of about 10,000nm, an operating altitude of 60,000-75,000ft and an endurance of perhaps more than a week airborne.[5]  WS-125A was to have a cruise speed of at least Mach 0.9, desirably offer supersonic dash in the target area and enter service with operational units in 1963.[6]  Realising such high ambitions was to prove problematic.

In July 1955, the NB-36H began flight test with the reactor going critical in flight for the first time in September. The reactor did not power the aircraft, instead of being tested to verify the feasibility of a safe, sustained nuclear reaction on a moving platform. For each NB-36 flight, the one-megawatt reactor was winched up into the bomb bay at a dedicated pit at Convair’s Fort Worth plant and then removed again after landing.[7] When in flight, the aircraft was accompanied by a radiation-monitoring B-50 (a slightly updated B-29) and a C-119 transport aircraft carrying paratroopers able to be dropped to secure any crash site and limit bystander exposure to radiation.[8] In total, the NB-36H made 47 flights, ceasing flying in March 1957.

The results of the nuclear propulsion tests and the NB-36H were mixed. HTRE-3 had proven nuclear-power turbojet feasible and that a flyable propulsion unit could be built albeit technical challenges remained. The major problem was that it was hard to build a nuclear reactor small enough to fit into aircraft, but which produced the operationally significant energy output required. It seemed that using contemporary technology would mean nuclear-powered aircraft were relatively slow. For a time, concepts of ‘nuclear cruise, chemical dash’ were investigated; supplemental aviation fuel would allow supersonic dash in the target area.[9]

Moreover, the NB-36H flight programme highlighted the hazards associated with operating such nuclear-powered aircraft. While well-shielded aircraft would not normally pose radiation dangers to air or ground crew, there were worries that accidents and crashes might release fission products from the reactors, and about the dosage from prolonged human exposure to leakage radioactivity.[10] In this, the test flights mainly served to draw attention to the real difficulties that would arise in working with nuclear fuel in operational service conditions.[11]

WS-125A was accordingly cancelled in early 1957. However, there remained occasional flickers of renewed interest in nuclear-powered aircraft into the early 1960s. The Continuously Airborne Missile Air Launcher (CAMAL) concept called for a nuclear-powered strike aircraft able to stay aloft on airborne alert for 2-5 days. This led into Dromedary, a turboprop design capable of an airborne alert for 70-100 hours and able to stand-off outside hostile territory and launch the 600-1000nm Skybolt ballistic missile.[12] These ideas meant research into aircraft nuclear propulsion continued although in only a fairly desultory fashion. This finally ended in 1961 when the new Kennedy administration reallocated funding.

The US Navy had also occasionally expressed interest in nuclear-powered turboprop flying boats. In April 1955, Operational Requirement CA-01503 sought a nuclear-powered seaplane capable of high subsonic speeds primarily for the attack of ports and warships using conventional and nuclear weapons with the secondary roles of mining and reconnaissance. The USN desired to have a prototype available for its evaluation no later than 1961. By mid-1956 the Navy had decided a solely-USN power plant was unjustifiable and that the Navy’s aircraft would use the USAF’s WS-125A power plant. The cancellation of the WS-125A thus terminated the USN’s plans as well.[13]  At one stage, it seemed the UK might sell three mothballed Princess-class flying boats to the USN for nuclear-power trials, but funding oscillated and eventually was not forthcoming.[14]

Further afield, the USSR was also busy. In the late 1950s Tupolev designed but did not build two nuclear-powered bombers: the subsonic Tu-119 and supersonic Tu-120. The Soviet leadership thought the projected payloads and speed were inadequate for the costs involved. Tupolev was though authorised to continue research on nuclear aircraft.[15] Accordingly, a Tu-95 turboprop bomber was modified at a nuclear complex near Semipalatinsk in Kazakhstan to allow flying a nuclear reactor, becoming the Tu-95LAL (Letayushchaya atomnaya laboratorya – flying atomic laboratory).[16] Mirroring the NB-36H trails, some 34 Tu-95LAL flights were undertaken in 1961 with the reactor on board but without providing propulsion. The tests similarly revealed that a nuclear-powered aircraft was impractical with the technology of the time. The gain in performance from not carrying chemical fuel was consumed by the heavy reactor and shields and so Soviet interest in nuclear-powered aircraft declined.[17]

Tu119side
The Tu-95LAL test aircraft. The bulge in the fuselage aft of the wing covers the reactor.(Source: Wikimedia)

In the end, a better technological solution won out. For both the US and the USSR, the ICBM fitted with lightweight thermonuclear warheads offered a much better answer to the problem of a long-range, highly survivable nuclear strike. The considerable effort and funds expended in investigating nuclear-powered manned aircraft yielded much technical information and engineering expertise but ultimately little else. This was not for lack of interest in the defence aerospace industry. At the time, Kelly Johnson of Lockheed’s Skunk Works fame wrote:

After a half century of striving to make aircraft carry reasonable loads farther and farther, the advent of a [nuclear] power plant that will solve the range problem is of the utmost importance […] this unique characteristic is one to be greeted enthusiastically.[18]

Dr Peter Layton is a Visiting Fellow at the Griffith Asia Institute, Griffith University. His PhD is in grand strategy, and he has taught on this at the US National Defense University. He is the author of the book Grand Strategy.

Header Image: An NB-36H producing contrails in flight. (Source: Wikimedia)

[1] This post partly draws on the author’s Chapter in Michael Spencer (ed.), Nuclear Engine Air Power (Canberra: Air Power Development Centre, 2019). This book discusses contemporary nuclear-powered propulsion systems for aircraft and missiles.

[2].  Jay Miller, The X-Planes: X-1 to X-31 (Arlington: Aerofax, 1988), pp. 69-73.

[3].  F.C. Linn, Heat Transfer Reactor Experiment No.3: Comprehensive Technical report, General Electric Direct-Air Cycle Aircraft Nuclear Propulsion Program (Cincinnati: General Electric Company, 1962), pp. 15-18.

[4].  Raul Colon, Flying on Nuclear: The American Effort to Built a Nuclear Powered Bomber.

[5].  Theo Farrell, ‘Waste in weapons acquisition: How the Americans do it all wrong,’ Contemporary Security Policy, 16:2 (1995), p. 194; ‘Thoughts on WS-110A,’ Flight, 10 January 1958, p. 44.

[6].  Comptroller General of the United States, Review of the Manned Aircraft Nuclear Propulsion Program of the Atomic Energy Commission and the Department of Defense, B-146749, 28 February 1963, p. 133

[7].  Colon, Flying on Nuclear.

[8].  Miller, The X-Planes., p. 210.

[9]Ibid., p. 73.

[10].  Brian D. Bikowicz, The Decay of the Atomic Powered Aircraft Program, 12 Nov 1992.

[11].  Bruce Astridge, ‘Propulsion,’ in Phillip Jarrett (ed.), Faster, further, higher: leading-edge aviation technology since 194 (London: Putnam, 2002), p. 134.

[12].  Peter J. Roman, ‘Strategic bombers over the missile horizon, 1957–1963,’ Journal of Strategic Studies, 18:1 (1995), pp. 208-13.

[13].  Comptroller General, Review of the Manned Aircraft Nuclear Propulsion Program, pp. 134-40.

[14].  Raymond L. Garthoff, ‘The Swallow and Caspian Sea Monster vs. the Princess and the Camel: The Cold War Contest for a Nuclear-Powered Aircraft,’ Studies in Intelligence, 60:2 (2016), p. 3.

[15].  Arthur J. Alexander, ‘Decision-Making in Soviet Weapons Procurement,’ Adelphi Papers, 18:147-148, (1978), p.32.

[16].  Garthoff, ‘The Swallow and Caspian Sea Monster vs. the Princess and the Camel,’ p. 2.

[17].  Piotr Butowski, ‘Steps Towards Blackjack,’ Air Enthusiast, 73 (1998), p. 40.

[18].  F.A. Cleveland and Clarence L. Johnson, ‘Design of Air Frames for Nuclear Power’, quoted in Bikowicz, Decay.