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Aug 16, 2024 22 tweets 8 min read Read on X
MiG-23 timeline🧵

The development of the MiG-23PD (aircraft 23-01) was decided in a goverment decree issued on 30 April, 1965. Its first flight was with P.M. Ostapenko at the controls, on 3 April, 1967. MiG-23PD (23-01)
Government approval for building the MiG-23 (23-11) aircraft with variable sweep wings, is issued to OKB-155 (MiG) on 28 February, 1966.

The first prototype, 23-11/1 (№ 231), with a R27F-300 engine, is transported for flight testing at Zhukovsky on May 26, 1967. Image
The first flight takes place on 10 June, 1967, with A.V. Fedotov at the controls. Factory test flights are completed in July 1968, and signed by A.I. Mikoyan on 6 November, 1968.

Both aircraft, 23-01 & 23-11, are displayed at the Domodedovo air parade on 9 July, 1967.
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Image
Note: Soviet aircraft have 3 designations. For example:

• design bureau project: type 23-11
• factory product: product 2
• service name: MiG-23

• design bureau project: K-13
• factory product: product 310
• service name: R-3S
Three more prototype aircraft will be built by OKB-155's Moscow Machine-Building Plant "Zenith" (ММЗ "Зинит"). MiG-23 23-11/2 (232) in December 1967, 23-11/3 (233) in June 1968 & 23-11/4 (234) in 1969. Image
At Moscow Machine-Building Plant "Banner of Labour" (ММЗ "Знамя Труда"), 2 a/c were built in 1968, in 1969 - 10. These aircraft were known as MiG-23 model 1969 (образца 1969). In 1970, 26 aircraft, known as MiG-23 model 1970 were built. In 1971, 2 a/c.
MiG-23, model 1969. 23-11, product 2.
MiG-23, model 1970. 23-11, product 2.
The first MiG-23 supplied to operational units (but only for familiarization) was the MiG-23S (23-21 or 23-11S, product 22). First flight 28 May, 1969. A total of 60 were produced in 1969-70, but only 59 were delivered (one aircraft crashed during factory tests in 1970).
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Image
One MiG-23S was also delivered to East Germany as an instructional airframe. Image
MiG-23 model 1971, (23-11, product 2), with Sapfir-23L (323L), ASP-23, TP-23, R27F2M-300 engine. A total of 102 were produced, 98 aircraft were delivered (2 crashed, 2 converted to MiG-23M). MiG-23, model 1971. 23-11, product 2.
MiG-23M (aircraft 23-11М, product 2M). With Sapfir-23D-III, ASP-23D, TP-23 or TP-23-1. The first flight of the MiG-23M was performed by A.V. Fedotov in June 1972, & accepted in service by goverment decree, 9 January 1974. Produced until 1978. Image
MiG-23MS (23-13, product 2MS). With Sapfir-21M (Almaz-23), 179 built between 1974 and 1978. MiG-23MF (23-11MF, product 2MF). 278 aircraft produced between 1978 and 1983 (1st Czechoslovakia). Total MiG-23M (with its export models), production amounted to 1810 aircraft.
MiG-23MS, Libyan Air Force.
MiG-23MF. Romanian Air Force.
MiG-23ML (23-12, product 3) with Sapfir-23ML, ASP-23DTsM, TP-23M. The project was approved by a government decree on 9 January, 1974. On 21 January, 1975, A.G. Fastovets performed the 1st flight on the MiG-23ML. In July 15 1975, the 2nd prototype took to the skies, & ... MiG-23ML prototype.
on November 27, the 3rd. MiG-23M № 3206 was used for testing the R35 engine, & the Sapfir-23ML radar was tested on № 1203. The first stage of joint state tests was completed at the end of 1975. It was launched into production in May 1976, 141 being produced until 1977. MiG-23ML with Sapfir-23ML.
MiG-23ML (23-12, product 3) with Sapfir-23MLA, ASP-17ML, TP-23M. The task was issued in September 1976, the deadline for completing joint state tests was set for September 1977. It went into production in the fourth quarter of 1977. The first delivery in June 1978. Image
Production of MiG-23ML for the Soviet Air Force continued until the end of 1982. Export began in 1981, 1st customer being Czechoslovakia. A total of 321 MiG-23P (23-14) were also built in 1978-1983. MiG-23ML/P were accepted into service by government decree on 18 January 1982. Image
In 1984, 65 export MiG-23MLD (product 23-22A & 23-22B) with Sapfir-23MLAE-2 (N008E) radar were produced for Bulgaria (16 aircraft) & Libya. Libyan MiG-23MLD.
The first 8 Bulgarian aircraft (385, 386, 389, 390, 391, 392, 395 & 396), produced at the beginning of 1984, arrived in Gabrovnitsa in the autumn, the rest (203, 204, 205, 211, 212, 215, 217 & 219) were produced in late 1984, & arrived in early 1985.
The last single-seat fighter MiG-23 was Bulgarian MiG-23MLD c/n 2960327219 (№ 219), manufactured 22 December 1984. During the first years of operation, it was also the aircraft with the most technical problems &, for this reason, with the fewest hours flown. Last MiG-23 fighter manufactured.
№ 219 was sold to Cote d'Ivoire in 2003, together with № 204. Today they are in Togo. Luckily, 217 & 203 found their way into US museums
Image
Image
Luckily, both MiG-23MLD № 203 & № 217 (probably 2nd to last ever produced) have found their ways into US museums.
Image
Image
In total, from 1968 to 1984, 4,256 MiG-23 were produced, of which 3,532 are fighters of various modifications, as well as 624 MiG-23B/BN fighter-bombers. Together with UBs & MiG-27, the total number of MiG-23 and MiG-27 produced exceeded 6,000.
End of thread.

I decided to make this basic🧵about MiG-23 fighter versions in order to give some context, but the numbers posted here are probably imperfect, and just the best that I could find. Main source was this book: Image

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More from @BaA43A3aHY

Jul 12, 2025
Gonna have to update the radar weight table.

▪MiG-25P/RP-25: 18800kg/600kg
▪Su-27SK/N001E: 16870kg/550kg
MiG-31/RP-31 (N007): 21820/1495kg
Su-30MKI/Bars (N011М): 18400/650kg
MiG-25PD/Sapfir-25(N005): 18800/336kg

Really doubting those MiG-25PD numbers.

MiG-25P/RP-25: 3.19%
MiG-25PD/N005: 1.80%
Su-27SK/N001E: 3.25%
Su-30MKI/N011M: 3.53%
MiG-31/N007: 6.85%
Read 4 tweets
Jun 3, 2025
MiG-23 turn rate🧵

One important fighter aircraft performance parameter, for close range air combat, is turn rate [°/s]. I will be comparing the maximum sustained & instantaneous turning ability of the MiG-23, with that of other contemporary fighters.
1▪Timeline

To identify the fighters contemporary with the MiG-23, and understand how they rank chronologically, I've made a list of "first flight dates". Keep in mind that, "first flight" date does not equate to "service entry" date. Image
For example, the Mirage F1 first flew in December 1966, but entered service in May 1973 (first squadron delivery). For the Mirage 2000, these are March 1978 & July 1984 respectively. So quite some time can elapse between the two events. Image
Image
Read 64 tweets
Apr 1, 2025
Su-15 Flagon turn rate🧵

There isn't that much online info available on this subject. Here's what I could find...

Image
According to the Su-15UT manual (two sear trainer) with two Tumansky R11F2S-300 engines (6200 kgf each), 6030L of usable internal fuel volume (5005 kg at 0.83 kg/L, T1 grade fuel). By my estimates, total internal fuel volume is 6140L (5096 kg at 0.83 kg/L). Image
Image
Limit load factor of n=5.0, when clean with 4400 kg of fuel remaining, or with two R-98 missiles & 3800 kg of fuel remaining.

Maximum Mach number at high altitude, M=1.75. Image
Read 16 tweets
Nov 4, 2024
Convair B-58 Нustlеr🧵

The B-58 was the most technologically advanced aircraft of its time. A Mach 2, wasp-waisted war chariot, drawn by four J79s, including silver brazed stainless steel honeycomb panels in its design.

But before getting into the technical stuff, some context. YB-58 (aircraft № 1). Cover of Avation Week magazine. Issue February 25, 1957.
The XB-58/YB-58 (aircraft № 1, tail number 5660) first flew on November 11, 1956, made at the Convair plant in Fort Worth, Texas. At this stage, it was without a belly-pod, tail gun, and was equipped with the J79-1 instead of the J79-5. YB-58 (aircraft № 1). Cover of Avation Week magazine. Issue December 17, 1956.
The first 30 aircraft (YB-58) built were meant to be used for development & flight testing.
You can see here & in the previous picture, among the difference from later aircraft produced, early YB-58s had small movable surfaces inboard of the elevons, called resolution surfaces. First 3 YB-58 aircraft built, 5660, 5661 & 5662. Convair Fort Worth, Texas, October 18, 1957.
Read 34 tweets
Sep 30, 2024
Spike inlets, the TsAGI way.
Soviet vs. Western designs🧵

One of the most common design of air inlet used on supersonic aircraft is the axisymmetric diffuser with external compression (which is just a fancy way of describing the spike/cone inlets of the... Schlieren flow visualisation of a external compression inlet at Mach 2.
MiG-21, Su-7/9/11/17, Yak-28, Tu-128, F-104, B-58, F-111, the Mirage family, Lightning, Lavochkin La-250, Mikoyan & Gurevich SM-12/12PM/12PMU, Ye-3U, I-7, I-75, Ye-150/152, MiG-23PD, Sukhoi P1, T-37, Saunders-Roe SR.177, Bristol T.188, BAC TSR-2... I think that's all of them 😮‍💨. Image
Note: the Lockheed A-12/SR-71/YF-12 have mixed (interna+external compression).

I've discussed the basic principle of axisymmetric supersonic inlets with external compression & differences between the small/large nosed Fishbeds previously in this thread.
Read 60 tweets
Sep 6, 2024
MiG-23ML or MiG-23MLA?
A pedantic🧵

I see a lot of people use the term "MiG-23MLA" when referring to the MiG-23ML with Sapfir-23MLA/Sapfir-23MLAE radar.

To be fair, I've also noticed a lot of former Soviet pilots use this term in order to differentiate between the MiG-23ML... Bulgarian MiG-23ML 23-12A with Sapfir-23MLA
...with Sapfir-23ML & MiG-23ML with Sapfir-23MLA. But I'm a snobbish MiG-23 fаnбоу, and as such, prefer to stick to nomenclature found in official documents.

First, some context. The MiG-23ML (product 23-12, product 3) with Sapfir-23MLA (product N003 or 323MLA) radar &... Early MiG-23ML, with Sapfir-23ML
& ASP-17ML optical sight (which includes the HUD). The previous MiG-23ML model had the Sapfir-23ML (product 323ML) & ASP-23DTsM. In order to differentiate between the two 23ML versions, Soviet pilots called the one equipped with Sapfir-23MLA radar the "MiG-23MLA". ASP-17MLE optical sight on the MiG-23ML 23-12B.
Read 11 tweets

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