PZL-Mielec Lim-6bis Fresco-C
Single-engine single-seat swept-wing jet fighter
Archive Photos 1
PZL-Mielec LIM-6bis Fresco-C (NX619M/619, c/n 1J0619) circa 6/25/2000 at the Aviation Expo 2000, Van Nuys Airport, Van Nuys, CA (John Shupek photo copyright &sopy; 2000 Skytamer Images)
PZL-Mielec LIM-6 Fresco-C (N2503N, s/n 1F0319, 1961) on display c.2005 at the Tillamook Air Museum, Tillamook, Oregon (John Shupek photos copyright © 2005 Skytamer Images)
The Mikoyan-Gurevich MiG-17 (NATO: Fresco) (China:Shenyang J-5) (Poland: PZL-Mielec Lim-5 & Lim-6) is a high-subsonic fighter aircraft produced in the USSR from 1952 and operated by numerous air forces in many variants. Most MiG-17 Fresco variants cannot carry air-to-air missiles, but shot down many aircraft with its cannons. It is an advanced development of the very similar appearing MiG-15 Fagot of the Korean War.
The MiG-17 Fresco first saw combat in 1958 over the Straits of Taiwan and was used as an effective threat against supersonic fighters of the United States in the Vietnam War. It was also briefly known as the Type 38, by U.S. Air Force designation prior to the development of NATO codes.
While the MiG-15bis Fagot would be destined to introduce swept wings to air combat over Korea, by 1949, the Mikoyan-Gurevich design bureau had already begun work on its replacement, originally the MiG-15bis45, which would fix any problems found with the MiG-15 Fagot in combat. The result was one of the most successful transonic fighters introduced before the advent of true supersonic types such as the Mikoyan-Gurevich MiG-19 Farmer and North American F-100 Super Sabre. The design would ultimately still prove effective into the 1960s when pressed into dogfights over Vietnam against supersonic types which were generally flown at subsonic speeds, and not optimized for subsonic maneuvering short-range engagements.
While the MiG-15 Fagot used a Mach sensor to deploy air brakes because it could not safely exceed Mach 0.92, the MiG-17 Fresco was designed to be controllable at higher Mach numbers. Early versions which retained the original Soviet copy of the Rolls-Royce Nene VK-1 engine were heavier with equal thrust. Later MiG-17 Frescos would be the first Soviet fighter application of an afterburner which offered increased thrust on demand by dumping fuel in the exhaust of the basic engine.
Though the MiG-17 Fresco still strongly resembles its forebear, it had an entirely new thinner and more highly swept wing and tailplane for speeds approaching Mach 1. While the North American F-86 Sabre introduced the all-flying tailplane which helped controllability near the speed of sound, this would not be adopted on MiG’s until the fully supersonic MiG-19 Farmer. The wing had a sickle sweep compound shape with a 45° angle like the U.S. North American F-100 Super Sabre near the fuselage and tailplane, and a 42° angle for the outboard part of the wings. The stiffer wing resisted the tendency to bend its wingtips and lose aerodynamic symmetry unexpectedly at high speeds and wing loads.
Other easily visible differences to its predecessor were the three wing-fences on each wing, instead of the MiG-15 Fagots two, the addition of a ventral fin and a longer and less tapered rear fuselage that added about 3 feet in length. The MiG-17 Fresco shared the same Klimov VK-1 engine and much of the rest of its construction such as the forward fuselage, landing gear and gun installation was carried over. The first prototype, designated I-330 SI by the construction bureau, was flown on the 14 January 1950, piloted by Ivan Ivashchenko.
In the midst of testing, pilot Ivashchenko was killed when his aircraft developed flutter which tore off his horizontal tail, causing a spin and crash on 17 March 1950. Lack of wing stiffness also resulted in aileron reversal which was discovered and fixed. Construction and tests of additional prototypes SI-2 and experimental series aircraft SI-02 and SI-01 in 1951, were generally successful. On 1 September 1951, the aircraft was accepted for production, and formally given its own MiG-17 designation after so many changes from the original MiG-15 Fagot. It was estimated that with the same engine as the MiG-15 Fagot’s, the MiG-17 Fresco’s maximum speed is higher by 40-50 kmh, and the fighter has greater maneuverability at high altitude.
Serial production started in August 1951, but large quantity production was delayed in favor of producing more MiG-15 Fagots so it was never introduced in the Korean War. It did not enter service until October 1952, when the MiG-19 Farmer was almost ready to be flight tested. During production, the aircraft was improved and modified several times. The basic MiG-17 Fresco was a general-purpose day fighter, armed with three cannons, one Nudelman N-37 37 mm cannon and two 23 mm with 80 rpg, 160 rounds total. It could also act as a fighter-bomber, but its bomb load was considered light relative to other aircraft of the time, and it usually carried additional fuel tanks instead of bombs.
Although a canopy which provided clear vision to the rear necessary for dog fighting like the North American F-86 Sabre was designed, production MiG-17F Frescos got a cheaper rear-view periscope which would still appear on Soviet fighters as late as the MiG-23 Flogger. By 1953, pilots got safer ejection seats with protective face curtain and leg restraints like the Martin-Baker seats in the west. The MiG-15 Fagot had suffered for its lack of a radar gun sight, but in 1951, Soviet engineers obtained a captured North American F-86 Sabre from Korea and they copied the optical gun sight and SRD-3 gun ranging radar to produce the ASP-4N gun sight and SRC-3 radar. The combination would prove deadly over the skies of Vietnam against aircraft such as the McDonnell Douglas F-4 Phantom II whose pilots lamented that guns and radar gunsights had been omitted as obsolescent.
The second prototype variant, SP-2 Fresco A, was an interceptor equipped with a radar. Soon a number of MiG-17P Fresco B all-weather fighters were produced with the Izumrud radar and front air intake modifications.
In early 1953 the MiG-17F day fighter entered production. The F indicated it was fitted with the VK-1F engine with an afterburner by modifying the rear fuselage with a new convergent-divergent nozzle and fuel system. The afterburner doubled the rate of climb and greatly improved vertical maneuvers. But while the plane was not designed to be supersonic, skilled pilots could just dash to supersonic speed in a shallow dive, although the aircraft would often pitch up just short of Mach 1. This became the most popular variant of the MiG-17 Fresco series. The next mass-produced variant, MiG-17PF Fresco D incorporated a more powerful Izumrud RP-2 radar, though they were still dependent on Ground Control Interception to find and be directed to targets. In 1956 a small series (47 aircraft) was converted to the MiG-17PM standard (also known as PFU) with four first-generation Kaliningrad K-5 (NATO reporting name AA-1 Alkali) air-to-air missiles. A small series of MiG-17R reconnaissance aircraft were built with VK-1F engine, after first being tested with the VK-5F engine.
Over 6,000 MiG-17 Frescos were built in the USSR by 1958. Another 2,000 were built under licence in Poland and China.
The next development, the MiG-19 Farmer was yet another derivative intended to reach supersonic speeds in level flight. The first prototype I-350 was based on the MiG-17 Fresco with an even greater wing and tail sweepBack of 60°, though the finalized design would look quite different from the original MiG-15 Fagot.
Day-fighter variants (MiG-17, MiG-17F) were armed with two 23 mm NR-23 cannons (80 rpg) and one 37 mm N-37 cannon (40 rounds), which were mounted on a common bed under the central air intake. The gun bed could be easily wound down for maintenance. On radar-equipped variants (MiG-17P, MiG-17PF), the 37 mm N-37 was replaced with a third 23 mm NR-23 (carrying 100 rpg) to compensate for the weight aft of the radar. All variants could carry 100 kg (220 lb) bombs on two underwing pylons and some could carry 250 kg (551 lb) bombs; however, these pylons were usually used for 400 liter (106 US gal) fuel tanks. The MiG-17R Fresco was armed with two 23 mm cannons.
The only variant with air-to-air missiles was the MiG-17PM (or MiG-17PFU), which could carry four K-5 (NATO: AA-1 Alkali). It had no cannons. Some countries occasionally modified their MiG-17 Frescos to carry unguided rockets or bombs on additional pylons.
The MiG-17P was equipped with the Izumrud-1 (RP-1) radar, while the MiG-17PF was initially fitted with the RP-1 which was later replaced with the Izumrud-5 (RP-5) radar. The MiG-17PM was also equipped with a radar, used to aim its missiles. Other variants had no radar.
License Production 2
In 1955, Poland received a license for MiG-17 Fresco production. The MiG-17F Fresco-C was produced by the WSK-Mielec factory under the designation Lim-5. The first Lim-5 was built on 28 November 1956 and 477 were built by 1960. An unknown number were built as the Lim-5R reconnaissance variant, fitted with the AFA-39 camera. In 1959-1960, 129 MiG-17PF Fresco-D interceptors were produced as the Lim-5P . PZL-WSK also developed several Polish strike variants based on the MiG-17 Fresco: the Lim-5M, produced from 1960; Lim-6bis, produced from 1963; and Lim-6M (converted in the 1970s); as well as two reconnaissance variants: the Lim-6R (Lim-6 "bis" R) and MR.
In China, an initial MiG-17F Fresco-C was assembled from parts in 1956, with license production following in 1957 at Shenyang. The Chinese-built version is known as the Shenyang J-5 (for local use) or F-5 (for export). According to some sources, earlier MiG-17 Frescos which had been delivered directly from the USSR were designated J-4. From 1964, the Chinese produced a radar-equipped variant similar to the MiG-17PF Fresco-D, which was known as the J-5A (F-5A). The Chinese also developed a two-seat trainer variant, the JJ-5 (FT-5 for export), which integrated the cabin of the JJ-2 (a license-built MiG-15UTI Midget) with the J-5. It was produced in 1966-1986, being the last-produced MiG-17 Fresco variant and its only twin-seater variant. The Soviets did not produce a two-seat MiG-17 as they felt that the training variant of the older MiG-15 Midget was sufficient.
Operational History 2
MiG-17 Frescos were designed to intercept straight and level flying enemy bombers, not for air to air combat (Dog-fighting) with other fighters. This subsonic (0.93 Mach) fighter was effective against slower (0.6-0.8 Mach), heavily loaded U.S. fighter-bombers, as well as the mainstay American strategic bombers during the MiG-17 Fresco’s development cycle (such as the Boeing B-50 Superfortress or Convair B-36 Peacemaker, which were both still powered by piston engines). Even if the target had sufficient warning and time to shed weight and drag by dropping external ordnance and accelerate to supersonic escape speeds, doing so would have inherently forced the enemy aircraft to abort its bombing mission. However, the USAF’s introduction of strategic bombers capable of supersonic dash speeds such as the Convair B-58 Hustler and General Dynamics FB-111 Aardvark rendered the MiG-17 Frescos obsolete in front-line PVO service and they were supplanted by supersonic interceptors such as the MiG-21 Fishbed and MiG-23 Flogger.
MiG-17 Frescos were not available for the Korean War, but saw combat for the first time over the Straits of Taiwan when PRC (Communist China) MiG-17 Frescos clashed with ROC (Nationalist China) North American F-86 Sabres in 1958.
In 1958, MiG-17 Frescos downed a US reconnaissance Lockheed C-130 Hercules over Armenia, with 17 casualties.
Vietnam War 2
In 1960, the first group of approximately 50 North Vietnamese airmen were transferred to the People’s Republic of China (PRC) to begin transitional training onto the MiG-17 Fresco. By this time the first detachment of Chinese trained MiG-15 Fagot pilots had returned to North Vietnam, and a group of 31 airmen were deployed to the People’s Liberation Army Air Force base at Son Dong for conversion to the MiG-17 Fresco. By 1962 the first North Vietnamese pilots had finished their MiG-17 Fresco courses in the Soviet Union and Red China, and returned to their units; to mark the occasion, the Soviets sent as a "gift" 36 MiG-17 Fresco fighters and MiG-15UTI Midget trainers to Hanoi in February 1964. These airmen would create North Vietnam’s first jet fighter regiment, the 921st. By 1965, another group of MiG pilots had returned from training in Krasnodar, in the USSR, as well as from the PRC. This group would form North Vietnam’s second fighter unit, the 923rd Fighter Regiment. While the newly created 923rd FR operated strictly MiG-17 Frescos, and initially these were the only types available to oppose modern American supersonic jets, more modern supersonic Soviet fighters would be later introduced as the 921st FR would operate both MiG-17 Frescos and MiG-21 Fishbeds (in 1969 the 925th FR MiG-19 Farmer unit would be formed).
Although U.S. fighter-bombers had been engaged in combat since 1961, and some of the most experienced Americans such as James Robinson Risner were Korean War aces, the North Vietnamese Air Force MiGs and their untried pilots lacked combat experience. The baptism of fire of the MiG-17 Fresco in this conflict occurred on 3 April 1965. That day two groups of MiGs took off from Noi Bai air base. The first group comprised two jets and acted like a bait; the second was made-up of four MiG-17 Frescos and was the strike group. Their target were U.S. Navy aircraft supporting an USAF 80-aircraft strike package trying the knock out Ham Rung bridge near Thanh Hoa. The MiG-17 Fresco leader, Lt. Pham Ngoc Lan, spotted a group of Vought F-8 Crusaders of the VF-211, USS Hancock, and shot-up the Vought F-8E Crusader flown by Lt. Cdr. Spence Thomas, which would perform an emergency landing ashore at Da Nang. His wingman Phan Van Tuc claimed a second Vought F-8 Crusader, but this is not corroborated by USN loss listings.
On 4 April 1965, the USAF conducted a "re-strike" on the Hàm Rông/Thanh Hoa bridge with 48 Republic F-105 Thunderchiefs of the 355th Tactical Fighter Wing (TFW) loaded with 384 × 750 lb (340 kg) bombs. The Thunderchiefs were escorted by a MiG CAP flight of North American F-100 Super Sabres from the 416th Tactical Fighter Squadron (TFS). Coming from above, four MiG-17 Frescos from the 921st Fighter Regiment (FR) tore through the escorts and dove onto the Thunderchiefs, shooting two of them down; the leader Tran Hanh downed Republic F-105D Thunderchief (AF 59-1754) of Major F. E. Benett, and his element leader Le Minh Huan downed Republic F-105D Thunderchief (AF 59-1764) of Captain J. A. Magnusson. The North American F-100 Super Sabres engaged with one firing a AIM-9 Sidewinder air-to-air missile which apparently missed, or malfunctioned, and another North American F-100D Super Sabre flown by Captain Donald Kilgus fired 20mm cannons, which also apparently missed, but shot down and killed Tran Hanh’s wingman Pham Giay. No other U.S. airmen reported any confirmed aerial kills during the air battle. However, Tran Hanh stated that three of his accompanying MiG-17 Frescos had been shot down by the opposing USAF fighters.
During the 4 April 1965 engagement, four MiG-17 Frescos from the 921st FR had tangled with over 50 U.S. jet fighter-bombers, consisting of Republic F-105 Thunderchiefs and North American F-100 Super Sabres. Three North American F-100 Super Sabres from the MiGCAP, piloted by LTC Emmett L. Hays, CPT Keith B. Connolly, and CPT Donald W. Kilgus, all from the 416th TFS, engaged the MiG-17 Frescos. One North American F-100 Super Sabre fired an air-to-air missile and Connolly and Kilgus engaged with 20mm cannon, with only Kilgus claiming a probable kill. The four attacking MiGs from the 921st FR were flown by Flight Leader Tran Hanh, Wingman Pham Giay, Le Minh Huan and Tran Nguyen Nam. Flight Leader Tran Hanh was the only survivor from the air battle and reportedly stated that his three MiG-17 Frescos were "... shot down by the Republic F-105 Thunderchiefs." Based upon the report, the USAF North American F-100 Super Sabres very well could have been mistaken for Republic F-105 Thunderchiefs, and the reported loss of three MiG-17 Frescos to those mistaken jet fighters would indicate that the USAF North American F-100 Super Sabres had obtained the first U.S. aerial combat victories during the Vietnam War.
The MiG-17 Fresco was the primary interceptor of the fledgling Vietnam People’s Air Force in 1965, scoring its first aerial victories and seeing extensive combat during the Vietnam War, the aircraft frequently worked in conjunction with MiG-21 Fishbeds and MiG-19 Farmers. Many historians believe that some North Vietnamese pilots, in fact, preferred the MiG-17 Fresco over the MiG-21 Fishbed because it was more agile, though not as fast; however, of the 16 NVAF Aces of the war, 13 of them attained that status while flying the MiG-21 Fishbed. Only three North Vietnamese Airmen gained Ace status while flying the MiG-17 Fresco. Those were: Nguyen Van Bay (7 victories), Luu Huy Chao and Le Hai (both with six).
The MiG-17 Fresco was not originally designed to function as a fighter-bomber, but in 1971 Hanoi directed that United States Navy warships were to be attacked by elements of the North Vietnamese Air Force. This would require the MiG-17 Fresco to be fitted with bomb mountings and release mechanisms. Chief Engineer of the NVAF ground crews, Truong Khanh Chau, was tasked with the mission of modifying two MiG-17 Frescos for the ground attack role; after three months of work, the two jets were ready. On 19 April 1972, two pilots from the 923rd FR took their bomb laden MiG-17 Frescos and attacked the U.S. Navy destroyer USS Higbee (DD-806) and light cruiser USS Oklahoma City (CLG-5). Each MiG was armed with two 250 kg (550 lb) bombs. Pilot Le Xuan Di managed to hit the destroyer’s aft 5" gun mount, destroying it, but inflicting no fatalities, as the crewmen had vacated the turret earlier due to a malfunction with the gun system. The other attacker from the two-plane sortie was flown by Nguyen Van Bay, an airman who would later end the war with seven confirmed air victories, all accomplished with his MiG-17 Fresco. On this day however, his fighter either managed to slightly damage the USS Oklahoma City, or miss it entirely, depending upon the source. Each pilot had completed their drop of two bombs each and returned to base. After the war, Truong Khanh Chau became the director of the Vietnam Institute for Science and Technology in 1977.
From 1965 to 1972, MiG-17 Frescos from the NVAF 921st and 923rd FRs would claim 71 aerial victories against U.S. aircraft: 11 Vought F-8 Crusaders, 16 Republic F-105 Thunderchiefs, 32 McDonnell Douglas F-4 Phantom IIs, two Douglas A-4 Skyhawks, seven Douglas A-1 Skyraiders, one Douglas C-47 cargo/transport aircraft, one Sikorsky CH-3C helicopter and one Ryan Firebee UAV.
The American fighter community was shocked in 1965 when elderly, subsonic MiG-17 Frescos downed sophisticated Mach-2-class Republic F-105 Thunderchief fighter-bombers over North Vietnam. To redress disappointing combat performance against smaller, more agile fighters like the MiGs, the Americans established dissimilar air combat training (DACT) in training programs such as "TOPGUN", which employed subsonic Douglas A-4 Skyhawk aircraft to mimic more maneuverable opponents such as the MiG-17 Fresco. The U.S. Navy also set adversary squadrons equipped with the nimble Douglas A-4 Skyhawk at each of its fighter and attack Master jet bases to provide DACT.
Other MiG-17 Fresco Users 2
Twenty countries flew MiG-17 Frescos. The MiG-17 Fresco became a standard fighter in all Warsaw Pact countries in the late 1950s and early 1960s. They were also bought by many other countries, mainly in Africa and Asia, that were neutrally aligned or allied with the USSR. The MiG-17 Fresco still flies today in the air forces of Burkina Faso, China (JJ-5 Trainer), Mali, Mozambique, North Korea, Republic of the Congo, Sudan, Tanzania and Zimbabwe.
MiG-17 Frescos were sold and/or imported to many Middle Eastern countries and saw action in nearly all of the Arab-Israeli conflicts starting when 12 of them served with the Egyptian Air Force during the Suez Crisis of 1956, plus hundreds more served, and were mostly destroyed, in the Egyptian and Syrian Air Forces during the Six-Day War of 1967 as well as the War of Attrition, the 1973 Yom Kippur War, and the 1982 Israeli Invasion of Lebanon.
At least 24 of them served with the Nigerian Air Force and were flown by a mixed group of local Nigerian and mercenary pilots from East Germany, Soviet Union, South Africa, the United Kingdom, and Australia during the 1967-70 Nigerian Civil War.
Four were hurriedly supplied by the USSR to Sri Lanka during the 1971 insurgency and were used for bombing and ground attack in the brief insurgency. Four North Korean MiG-17 Fresco aircraft were involved in the Lockheed EC-121 Warning Star shootdown incident in 1969.
Similarly in 1958, a U.S. Air Force Lockheed C-130 Hercules was shot down by four MiG-17 Fresco fighters when it flew into Soviet airspace near Yerevan, Armenia while on a Sun Valley SIGINT mission, with all 17 crew killed.
A number of U.S. federal agencies undertook a program at Groom Lake to evaluate the MiG-17 Fresco to help fight the Vietnam War, as North Vietnamese MiG-17 Frescos and MiG-21 Fishbeds had a kill rate against them of 9:1. The program was code-named HAVE DRILL, involving trials of two ex-Syrian MiG-17F Frescos-C fighters over the skies of Groom Lake. These aircraft were given USAF designations and fake serial numbers so that they may be identified in DOD standard flight logs.
In addition to tracking the dog fights staged between the various MiG models against virtually every fighter in U.S. service, and against SAC’s Boeing B-52 Stratofortress and Convair B-58 Hustlers to test the ability of the bombers’ countermeasures systems. They also performed radar cross-section and propulsion tests that contributed greatly to improvements in U.S. aerial performance in Vietnam.
According to the FAA there are 27 privately owned MIG-17 Frescos in the United States.
Mikoyan-Gurevich MiG-17 Variants (USSR) 2
PZL-Mielec LIM-5 and -6 Variants (Poland) 3
Shenyang J-5 Variants (China) 4
MiG-17 Operators 2
Specifications (Mikoyan-Gurevich MiG-17F Fresco-C) 2
Specifications (PZL-Mielec LIM-6bis Fresco-C) 3
Specifications (Shenyang J-5) 4