Within Exploit vs Copy
Why The US Tested A Mi G 21
The MiG-21 tests showed how a captured aircraft could improve air combat tactics rather than become a production blueprint.
On this page
- How the aircraft reached US evaluators
- Performance testing against US fighters
- Tactical lessons instead of cloning
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Introduction
Project Have Doughnut is one of the clearest examples of foreign military technology exploitation being used to improve combat effectiveness rather than to create a copy of the captured system. When the United States obtained access to a Soviet-built MiG-21 in 1968, the objective was not to manufacture an American version of the aircraft. Instead, the programme sought to answer a practical wartime question: how should American pilots fight a MiG-21 in air combat? The resulting tests transformed understanding of Soviet fighter capabilities, informed tactical doctrine, and contributed to later air-combat training reforms. In the broader history of reverse engineering foreign military technology, Have Doughnut demonstrates that the most valuable output from a captured weapon can be knowledge rather than reproduction.[f-106deltadart.com]f-106deltadart.comcombat aircraft and associated…
How the Aircraft Reached US Evaluators
The MiG-21 used in Have Doughnut did not come from a battlefield recovery programme. It reached Western hands after Iraqi Air Force pilot Munir Redfa defected to Israel in August 1966 during the Israeli intelligence operation known as Operation Diamond. The aircraft was one of the most important Soviet combat aircraft of its era, and obtaining a flyable example provided a rare opportunity to examine an adversary system directly rather than through intelligence estimates.[wikipedia.org]WikipediaOperation DiamondApril 13, 2026 — In January 1968, Israel loaned the MiG to the United States, which evaluated the jet under the HAVE DOUGHNUT program. Th…
Israel studied the aircraft and later loaned it to the United States. In early 1968 the MiG was transferred under extreme secrecy to Groom Lake, the Nevada test site commonly associated with Area 51. There it was redesignated YF-110 and became the centrepiece of a Defence Intelligence Agency programme known as Have Doughnut. Air Force and Navy personnel jointly participated in the evaluation effort.[Wikipedia]WikipediaHave DoughnutHave Doughnut
The significance of this transfer lay not in acquiring Soviet manufacturing secrets for production purposes, but in obtaining a genuine operational aircraft that could be flown, measured and fought against. Intelligence analysts no longer had to infer MiG-21 performance from combat reports or technical estimates. They could observe the aircraft directly in controlled conditions.[f-106deltadart.com]f-106deltadart.comcombat aircraft and associated…
Why the US Tested a MiG-21
The MiG-21 was already confronting American aircraft in the Vietnam War. US commanders needed reliable information about its strengths, weaknesses and tactical behaviour. Have Doughnut was therefore structured around operational questions rather than industrial ones.
Official test objectives included:[f-106deltadart.com]f-106deltadart.comProject Have Doughnut by John LoweryHave Doughnut test objectives were to evaluate the airplane's effectiveness as a day fighter-interceptor and its secondary role in ground…
- Evaluating the effectiveness of existing US Air Force and US Navy tactics against the MiG-21.
- Measuring the aircraft’s design, performance and operational characteristics.
- Identifying advantages and vulnerabilities in air-to-air combat.
- Developing improved tactics where existing methods proved inadequate.[gwu.edu]nsarchive2.gwu.edu• Exploit the tactical capabilities of the…Read more…
This focus illustrates the distinction between exploitation and copying. Engineers and pilots examined the aircraft, but the intended product was tactical intelligence. The desired outcome was a better-prepared fighter force, not a production programme for Soviet-style aircraft.[f-106deltadart.com]f-106deltadart.comcombat aircraft and associated…
Performance Testing Against US Fighters
Have Doughnut subjected the MiG-21 to extensive flight testing and comparative air-combat exercises. Test pilots gathered data on speed, manoeuvrability, acceleration, visibility, endurance and radar characteristics. The aircraft was then flown against American fighters in scripted engagements designed to replicate realistic combat situations.[f-106deltadart.com]f-106deltadart.comcombat aircraft and associated…
The testing revealed a more nuanced picture than many American pilots expected. The MiG-21 was not an all-purpose super-fighter, but neither was it an inferior aircraft. Evaluators found it highly manoeuvrable in certain flight regimes, difficult to spot visually because of its small size, and capable of presenting serious challenges to aircraft such as the F-4 Phantom II.[theaviationgeekclub.com]theaviationgeekclub.comThe Aviation Geek Club Have Doughnut and Have Drill: the classified programsThe Aviation Geek ClubHave Doughnut and Have Drill: the classified programs…May 19, 2024 — Have Doughnut was designed with the specifi…
At the same time, the tests identified important limitations. The MiG-21 suffered from relatively short endurance and operational constraints that could be exploited by opponents who understood them. Rather than producing a simple verdict of “better” or “worse”, the programme mapped where the aircraft was dangerous and where it was vulnerable.[airandspaceforces.com]airandspaceforces.comAir & Space Forces MagazineHave DoughnutJun 1, 2010 — The Have Doughnut test objectives were to evaluate the airplane's effectiveness as…
This kind of detailed performance knowledge was precisely what could not be obtained from technical manuals alone. It required flying the aircraft, measuring it, and comparing it directly against American fighters under controlled conditions.[f-106deltadart.com]f-106deltadart.comcombat aircraft and associated…
Tactical Lessons Instead of Cloning
The most important result of Have Doughnut was not technical replication but tactical adaptation. The programme generated recommendations about how American pilots should engage MiG-21s in combat and which manoeuvres should be avoided. Evaluators assessed existing tactics, modified them where necessary and developed new approaches based on observed aircraft behaviour.[gwu.edu]nsarchive2.gwu.edu• Exploit the tactical capabilities of the…Read more…
One major lesson was that pilots needed to understand the MiG-21’s strengths within specific parts of its flight envelope rather than relying on broad assumptions about Soviet equipment. The tests demonstrated that success depended on exploiting American advantages while avoiding situations that favoured the MiG. Tactical guidance therefore became more precise and evidence-based.[theaviationgeekclub.com]theaviationgeekclub.comThe Aviation Geek Club Have Doughnut and Have Drill: the classified programsThe Aviation Geek ClubHave Doughnut and Have Drill: the classified programs…May 19, 2024 — Have Doughnut was designed with the specifi…
The influence extended beyond individual manoeuvres. The inability to distribute highly classified findings widely enough to operational squadrons highlighted shortcomings in pilot training. Histories of the programme have linked its lessons to broader efforts that eventually strengthened advanced fighter training and helped shape institutions such as the Navy Fighter Weapons School, better known as Top Gun.[Wikipedia]WikipediaHave DoughnutHave Doughnut
This outcome underscores why Have Doughnut belongs in the history of foreign materiel exploitation rather than weapons copying. The captured MiG-21 generated tactical doctrine, training insights and a more accurate understanding of an adversary aircraft. The United States did not need to build its own MiG-21. It needed to know how to defeat one, and Have Doughnut delivered exactly that.[f-106deltadart.com]f-106deltadart.comcombat aircraft and associated…
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Endnotes
1.
Source: f-106deltadart.com
Link:https://www.f-106deltadart.com/pdf-files/Project-Have-Doughnut-Tactical-Project-DIA-Report.pdf
Source snippet
combat aircraft and associated...
2.
Source: Wikipedia
Title: Operation Diamond
Link:https://en.wikipedia.org/wiki/Operation_Diamond
Source snippet
April 13, 2026 — In January 1968, Israel loaned the MiG to the United States, which evaluated the jet under the HAVE DOUGHNUT program. Th...
Published: April 13, 2026
3.
Source: Wikipedia
Title: Have Doughnut
Link:https://en.wikipedia.org/wiki/Have_Doughnut
4.
Source: Wikipedia
Title: Anarchy:Area 51
Link:https://en.wikipedia.org/wiki/Anarchy%3AArea_51
5.
Source: upload.wikimedia.org
Link:https://upload.wikimedia.org/wikipedia/commons/8/8f/Project_have_doughnut_area51_49.pdf
Source snippet
OF THE MIG-21AFFTC Lessons Learned. □ Power checked at Mil power prior to brake release... □ MiG-21 Aircraft at Test Site. □Reassembly...
6.
Source: roadrunnersinternationale.com
Title: migs area51
Link:https://www.roadrunnersinternationale.com/migs_area51.html
Source snippet
EXPLOITATION OF SOVIET MiGs AT AREA 51The purpose of Have Doughnut was to evaluate the effectiveness of existing tactical maneuvers by US...
7.
Source: Wikipedia
Link:https://ru.wikipedia.org/wiki/%D0%9C%D0%B8%D0%93-21
8.
Source: f-106deltadart.com
Link:https://www.f-106deltadart.com/havedoughnut.htm
Source snippet
Have Doughnut | F-106 Delta Dart9 Dec 2025 — Have Doughnut was the name of a Defense Intelligence Agency project whose purpose was to eva...
9.
Source: f-106deltadart.com
Title: Project Have Doughnut by John Lowery
Link:https://f-106deltadart.com/pdf-files/Project-Have-Doughnut-by-John-Lowery.pdf
Source snippet
Have Doughnut test objectives were to evaluate the airplane's effectiveness as a day fighter-interceptor and its secondary role in ground...
10.
Source: youtube.com
Title: HAVE DOUGHNUT
Link:https://www.youtube.com/watch?v=pG6n6aKC1bM
Source snippet
Declassified: "Throw a Nickel on the Grass" HAVE DOUGHNUT Briefing...
11.
Source: nsarchive2.gwu.edu
Link:https://nsarchive2.gwu.edu/NSAEBB/NSAEBB443/docs/area51_48.PDF
Source snippet
• Exploit the tactical capabilities of the...Read more...
12.
Source: airandspaceforces.com
Link:https://www.airandspaceforces.com/article/0610doughnut/
Source snippet
Air & Space Forces MagazineHave DoughnutJun 1, 2010 — The Have Doughnut test objectives were to evaluate the airplane's effectiveness as...
13.
Source: unwritten-record.blogs.archives.gov
Title: throw a nickel on the grass and have a doughnut
Link:https://unwritten-record.blogs.archives.gov/2022/10/18/throw-a-nickel-on-the-grass-and-have-a-doughnut%EF%BF%BC/
Source snippet
16, 1966, Iraqi Air Force Capt. Munir Radfa defected to Israel in a MiG-21 jet fighter. After the revolution of 14 July 1958 that...Read...
Published: July 1958
14.
Source: theaviationgeekclub.com
Title: The Aviation Geek Club Have Doughnut and Have Drill: the classified programs
Link:https://theaviationgeekclub.com/have-doughnut-and-have-drill-the-classified-programs-that-optimized-the-f-4-phantom-iis-performance-margin-over-the-mig-17-and-mig-21/
Source snippet
The Aviation Geek ClubHave Doughnut and Have Drill: the classified programs...May 19, 2024 — Have Doughnut was designed with the specifi...
Published: May 19, 2024
15.
Source: dictionary.cambridge.org
Link:https://dictionary.cambridge.org/dictionary/english/have
Source snippet
English meaning - Cambridge DictionaryHave is one of three auxiliary verbs in English: be, do and have. We use have before -ed forms to...
16.
Source: theaviationist.com
Title: have doughnut
Link:https://theaviationist.com/2013/11/02/have-doughnut/
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It's a large pdf file (22 MB) but contains all the details about the flying activity conducted in 1968, therefore it's worth a read.Read...
Additional References
17.
Source: reddit.com
Link:https://www.reddit.com/r/grammar/comments/kkj6m9/have/
Source snippet
HAVE: r/grammarI'm wondering what's the use of the word HAVE in this sentence. "That said overall you guys have handled it exceptionally...
18.
Source: merriam-webster.com
Link:https://www.merriam-webster.com/dictionary/have
Source snippet
HAVE Definition & MeaningThe meaning of HAVE is to hold or maintain (something tangible or intangible) as a possession, privilege, entitl...
19.
Source: facebook.com
Title: one is a mig 21 and the other is its imposter in 1969 the us navy established th
Link:https://www.facebook.com/EAA/posts/one-is-a-mig-21-and-the-other-is-its-imposter-in-1969-the-us-navy-established-th/1366492622171357/
Source snippet
One is a MiG-21, and the other is its “imposter”! In 1969...It was useful in that it taught F-4 pilots to avoid a turning fight with the...
20.
Source: facebook.com
Title: delivery of an iraqi mig 21 to israel operation yahalom august 1966on august 16
Link:https://www.facebook.com/IsraelAviation/posts/delivery-of-an-iraqi-mig-21-to-israel-operation-yahalom-august-1966on-august-16-/733479158944084/
Source snippet
Delivery of an Iraqi MIG-21 to IsraelIn 1968, after Israel loaned the MiG-21 to the US, operation “HAVE Doughnut” began with the purpose...
21.
Source: youtube.com
Link:https://www.youtube.com/watch?v=LjZ4AwzwtPo
Source snippet
MiG-21: This Aircraft Changed Western AirpowerThe MiG-21 vs F-4 Phantom II, it's a legendary duel in air warfare. Yet beyond the dogfight...
22.
Source: reddit.com
Title: During the late 60’s the DIA evaluated a “stolen” Mi G-21
Link:https://www.reddit.com/r/aviation/comments/fikxdc/during_the_late_60s_the_dia_evaluated_a_stolen/
Source snippet
Code named Have Doughnut the top-secret project gave American pilots insights into the MiG's performance and in turn enabled them to expl...
23.
Source: reddit.com
Link:https://www.reddit.com/r/hoggit/comments/2iekf9/for_those_that_are_interested_this_is_the_report/
Source snippet
purpose was to evaluate and exploit a MiG-21 "Fishbed-E" that the United States Air...
24.
Source: scribd.com
Link:https://www.scribd.com/document/75085757/Have-Doughnut-USAF-MiG-21-Exploitation
Source snippet
aircraft and presents tactical performance comparisons of the...Read more...
25.
Source: combatace.com
Title: 59874 fighter performance f 4 vs mig 21
Link:https://combatace.com/forums/topic/59874-fighter-performance-f-4-vs-mig-21/
Source snippet
Fighter Performance: F-4 vs MiG-2113 Oct 2010 — The Phantom had advantages like having a two men crew, better range, better weapons syste...
26.
Source: youtube.com
Title: American Mi G-21 and Mi G-17 Flying Over Area 51
Link:https://www.youtube.com/watch?v=ilq6xGj1L20
Source snippet
American MiG-21 and MiG-17 Flying Over Area 51 - The Story...This is the story of Have Doughnut and Have Drill - Two little known operat...
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