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Saab Draken J-35 and its A/B/F versions


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Well now let's have Tier-VII, so let's go   

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                           Sweden

 

Saab Draken J-35

https://i.imgur.com/BW97OA7.jpg

 

The revolutionary Swedish delta began its career in the 1950s, and was withdrawing from the Swedish Air Force in the 1990s.

 

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If Draken had been produced by Britain, for example, his fame and commercial success would be guaranteed. It might even be remembered as an ideal, low-cost replacement for the Hawker Hunter. But these fighters were born in Sweden, whose policy of exporting limited their sales to the few nations (in the middle of years 80, only Denmark and Finland operated).
In the 1950s, the Swedes (as well as the French) understood that their air defense required low-cost and large-scale fighters. And while Britain retricted to the English Electric Lightning Birreator (an operational derivative of the aerodynamic research airplane P.1), planned large-sized aircraft capable of carrying long-range guided missiles that never materialized, Sweden led the improvement of the afterburner to new limits. He showed the world what could be achieved with a well-designed single-turbine fighter.

 

Draken's history dates back to 1949, when Flygvapen (Swedish Air Force) opened competition for the design of an interceptor that succeeded the Saab J29 (the "Flying Barrel"); the new aircraft should provide defense against bombers at speeds between Mach 1.4 and 1.5 in level flight, but then this figure ended up at Mach 1.7 to 1.8.
In order to have a historical perspective on this project, it is necessary to remember that the first European fighter wing, the J29, had flown only a year, on September 1, 1948, and there was no other device in the world with this kind of wing operating conditions. The North American F-86 Saber and the Mikoyan-Gurevich Mig-15 were just beginning to be delivered to their units, and the Swedish Air

Force already required a speed greater than 50%.

 

In addition to a genuine supersonic performance - therefore much more advanced than the North American F-100 Super Saber, which only flew on May 25, 1953 - the Dranken should have a very high ascent rate and ability to operate on the same tracks as the J-29. It meant that, in addition to the conventional fields, he would also be able to use stretches of 2,000m long road, some 25m and some 13m wide. Such a requirement implied moderate speed of takeoff and landing and excellent resourcefulness in the ground.


To solve the problem of the brutal increase in speed, the Saab project team, led by Erik Bratt, decided to combine the Rolls-Royce Avon turbine with afterburners and a low-drag aerodynamic drag. This reduction in drag required minimizing the maximum cross-section of the airplane, in addition to the use of thinner wings, within the construction techniques of the time. The studies pointed to the possibility of a thickness / rope ratio of up to 4.5 or 5%, provided that the wing had a relatively large rope (leading edge to the leakage distance measured from within the wing). It meant that pre would need to be delta.

 

Minimizing the diameter of the fuselage was achieved by "hiding" one object behind the other. Thus, the turbine was placed behind the cockpit, leaving the main tanks and landing gear after the air intakes. The plane, similar to the Dassault Mirage III (which would only fly seven years later in November 1956), had a simple delta wing, with flattened air intake merging into a thick rope at the root. The span would be determined according to the required operating ceiling, since the drag induced is dictated by the load span, that is, the weight / span ratio. Likewise, the rope at the root of the wing was defined by the volume of fuel needed for the interception missions.

 

New Concept Essays

With little data on the behavior of delta-type aircraft and no information on the new double delta, Saab initially tested them using a 1/8 scale model in a conventional aerodynamic tunnel and then with a crew model in a 70% scale, designated as Saab 210 Lilldraken (Little Dragon). Driven by an Armstrong Siddely Adder turbine, with 476kg of buoyancy, this device had a Draken-like wing on a natural scale, but the air intakes were by the nose. As it was only intended for the study of low-speed maneuverability, the Lilldraken had a semi-retract landing gear and its cockpit was disproportionately large.

The theoretical analysis indicated that, compared to the simple delta, the double facilitated the location of the center of gravity near the aerodynamic center. In Lilldraken, however, it was decided to adjust the position of the center of gravity by pumping the fuel between the tanks (in the same way as the dragging of the compensators in the supersonic Concorde was reduced). The Saab 210 project started in May 1950 and the couple flew on February 21, 1952. With about 1,000 flights, this technology demonstrator proved there were no major operational problems with the new wing configuration.

 

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The Lilldraken, with A-S Adder turbine, air intakes in the nose and semi-retratillation landing gear. The center of gravity was adjusted by a fuel bomber.

Spoiler

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Saab 210 "Lilldraken" - Experimental aircraft. By developing the Saab 35 "Draken", Saab made a bold move by choosing a double delta wing configuration..
Due to limited knowledge of this configuration, it was decided to build a special test-bed in order to improve the project safety. The experimental aircraft was scaled down to 70 percent of the planned size and was given the designation Saab 210 "Lilldraken". The intention was primarily to test the flight characteristics at low speeds and to test the assumptions made before undertaking full-scale construction.

 

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The maiden flight on 21 January 1952 was made by Bengt Olow.

 

The high speed tests took place in supersonic tunnels (some in the United States) with models.
The double delta gained confidence, and the Swedish authorities ordered the assembly of a Mock-up (a real-scale model that is not intended to fly, therefore not a prototype), the J-35 in March 1952 In August 1953, a contract was signed for three prototypes and three pre-series airplanes. The first, Saab 35, flew on October 25, 1955. In parallel, the situation of the other Western supersonic fighters was as follows: the F-100 flew in 1953: Lockheed F-104 and Convair F-102A in 1954; the Mirage IIIA and the Convair F-106 would fly in 1956; and Lightning in 1957. Saab was thus close to the Americans and leading the European industry.

 

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When the first J-35 Draken prototype flew on October 25, 1955, it placed Sweden at the forefront of supersonic fighters, especially in Europe.

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Demonstration of the Saab 35-1 aircraft landing after the first flight

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The first test units are 35-1, -2, -3, -4 and -5.

 

The three prototypes had imported Rolls-Royce Avon turbines; the second and third aircraft joined the experimental flight program in January and March 1956, respectively. Subsequent Draken were fabricated with Avon impellers produced under license from Svenska Flygmotor (Volvo Flygmotor), which also developed a post-burner capable of thrust much larger than the British design. Except for the shape of the wing, the Draken was a conventional fighter, with fully servo commands, redundant hydraulic systems (duplicates) and an emergency blower for impact air to provide pressure in case of turbine failure. The construction did not bring news, although it used a beehive in some places. The fuel was stored in a combination of flexible cells and integral tanks. Two unusual features: the three small wings under the wing outer panel and the front train doors, to minimize the effects on directional stability in landings.

 

The prototypes were a success, reaching Mach 1.4 speed. On February 15, 1958, pre-series aircraft were flown, different only by the RM-6B, locally manufactured thrust with Model 65 afterburner. Although it was a provisional version, Fuerza Aerea ordered 65 J-35A, in a contract signed in August of 1956 (including the three of pre-series).

 

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In service

As usual, for ease of communication, deliveries of Saab's new military aircraft were formerly aimed at a regiment in the industrial neighborhoods of Linkoping.
The J-35A differed from later models, monoplaces, by the shorter tail cone. The reports show that with the altered post-burner in Sweden the thrust increased to about 7,000 kg (against 6,545 kg of the British original) and the maximum speed increased to Mach 1.8. This Draken had as armament two Aden 30mm cannons on the leading edges, with ninety projectiles each. Then he made four infrared-guided RB-24 Sidewinder air-to-air missiles, manufactured under license by Saab.

Empty weighed 6,590 kg; at full fuel capacity (2,240 liters), the maximum takeoff weight reached 9,070 kg. It was equipped with a Lear autopilot and a Saab S6 fire control system. The radar, manufactured by Ericsson, was based on Cyrano's CSF.

 

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J-35A demonstrating its ability to carry variable armaments

 

Weapon options J35A Draken:

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J35A with RB24B and ADEN for hunting missions

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J35A with ARAK and ADEN and FT for attack missions

 

weaponry
The J35A was armed with two ADEN 30mm automatic guns that were placed on the respective inner wings and equipped with a magazine of 90 shots by AKAN.
Under the wings and fuselage, RB24B type fighter robots and 13.5 cm ARAK rocket attackers could be hung under the wings in special bundles. If the aircraft carried an extra fuel tank, the so-called Fälltank FT, only the suspended RB24B could be loaded.

Beam S5V and S5H in the position of beam 4, one under each wing was, together with an extension rail in each beam intended for RB24B
The beam Y in the position of the beam 5 centrally below the fuselage, along with two ejector rails, was designed for the RB24B.
The beam A5 in beam position 1, 2 and 3, under each wing, was designed for the ARAK, with single or double suspension.
The visibility of these weapons was a combined S-6B reflex sight for daytime and dark steering supported, among other things, by a vision radar and a dark camera.

 

Weapon options J35B Draken:

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J35B with JRAK, RB24B and ADEN for hunting missions

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J35B with RB24B and ADEN for hunting missions

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J35B with RB24B and ADEN and FT for hunting missions
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J35B with ARAK, JRAK and ADEN for attack missions
 
weaponry

The second hunting version of the dragon was like J35A armed with two 30mm ADEN automatic weapons, but with a magazine of 100 shots / ADEN. Under the wings and body could be mounted hunting robots of the RB24B type, under the body 7.5 cm hunting rockets JRAK in capsules and under the wings 13.5 cm of attack of the rockets ARAK in special beams. If the fuel was used in the so-called Fälltank FT, the possibility of only RB24B mounted wing-mounted fighters was limited.

The beam S5V and S5H at the position of beam 4, one under each wing along with a projection rail in each beam, were designed for the RB24B
The beam Y in the position of the beam 5 below the fuselage together with the two extension rails were intended for two RB24B.
Beam Y at beam position 5 below the fuselage along with two J5Y beams was intended for two JRAK (19 units / capsule).
The beam A5 at beam positions 1, 2 and 3 under each wing was designed for ARAK, with single or double suspension.

The visibility of these weapons was a combined vision and radar vision for the day and the dark direction supported by a vision radar.
 
Weapon options J35F Draken:
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J35F with RB27 and / or RB28 and / or RB24B (1978 RB24J) and ADEN for hunting missions.
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J35F with RB27 and / or RB28 and / or RB24B (1978 RB24J) and ADEN and two FT for hunting missions
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J35F with ARAK, JRAK and ADEN for Attack Missions
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J35F with ARAK and ADEN and two FTs for attack missions
 
weaponry

J35F was armed with a ADEN 30mm automatic weapon with magazine of 100 shots. Under wings and body could be mounted hunting robots of type RB27 and RB 28 and under body RB24B (after 1978 RB24J) or 7.5 cm of rocket fighter, JRAK in capsules and under the wings 13.5 cm of ARAK attack in special beams. The FT was restricted to the possibility of only hunting robots mounted on the wings RB27, RB28 or RB24J or ARAK.

Beam F5H and F5V in position of beam 4, one under each wing was designed for RB27 and RB28
The beam S5V and S5H at the position of beam 4, one below each wing along with a projection rail in each beam, were designed for the RB24J
Beam S5K at beam position 6, two below the fuselage, along with a rail of 24 robot in each beam were assigned to RB24B (after 1978 RB24J).
F5K beam at beam position 6, two below the fuselage were assigned to RB27 and RB28.
Beam J5K in beam position 6, two under the fuselage was intended for JRAK (19 units / capsule)
The beam A5 in beam position 1, 2 and 3 under each wing was designed for ARAK, suspended or suspended
The purpose of these weapons was a combined vision and radar-backed vision radar for daytime and dark alignment at any time.
 

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SAAB J 35A, of the F 13 squadron in 1960

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Two J 35D fighters from the F13 air wing of the Swedish Air Force in flight. Perfectly visible shape of the wing of the aircraft. The J 35D had more powerful licensed RM6C (Avon 300) engines with Flygmotor afterburners.
 
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Saab J35F Draken armed with infrared guidance Falcon missiles and semi-active radar. The Swedish hunt turned out to be one of the best interceptors of its generation for any weather condition
 
The J-35B differed externally because it had an elongated rear fuselage and a double tailblade, concealable, to correct the attitude to the ground at landing and, in particular, to improve aerodynamic braking on the ground, already rolling on the track. It was equipped with Model 66 post-burner, STRIL-60 data transmission to operate with the Swedish air defense system, collision course Saab S7 fire fighting and additional supports to extend its ground attack capability and allow the use of unguided missiles in airborne interceptions. The model could carry two Saab cocoons, each with nineteen 75mm Bofors rockets, or four 250kg bombs, or nine 100kg bombs. The J-35B prototype, a modified J-35A, flew on November 29, 1959. This version was delivered in 1961 to F16 in Uppsala and the year following F18 in Tulling near Stockholm. In 1964, four J35Bs from the F18 began to form the Swedish aerobatics team, Acro Delta, which had previously adopted the Hawker Hunter.
Shortly after the J-35B, on December 30, 1959, flew the SK35C, biplace trainer. It retained the Model 65 post-burner and J35A's short tail cone. The space for the second cockpit was achieved by rearranging the equipment. This version had no operational capability and it is believed that its maximum speed was limited to Mach 1.5. as the visibility of the rear cockpit was unsatisfactory a periscope was installed, although such equipment impaired the direct frontal vision of the instructor.
The next model, J-35D, was another monoplace. The main change was in the more powerful RM 6C turbine of the Avon 300 series, manufactured under license, with postburner Model 67 and thrust of 8,000 kg. This Draken also had expanded outlets to meet the increased air demand of the new thrust, and a larger rear section to accommodate the afterburner. Volvo achieved this remarkable thrust simply by increasing the diameter of the jet's exhaust nozzle, which reduced the velocity of the hot gases and allowed a more complete combustion of the fuel. Rolls-Royce could not use the same feature when it supplied the turbines to Lightning because the fuselage of this aircraft did not allow the magnification needed to receive a larger post-burner.
In addition to the turbine changes, the J35D was equipped with the Ericsson PS-03 radar, Saab S7 fire control and Saab FH-5 autopilot. It had internal capacity of fuel for 2,765 liters and seat zero-zero Saab aided by rocket. It was the first Draken to reach Mach 2. He made his initial flight on December 27, 1960; 120 of these aircraft equipped the F4 regiment (in angelholm), the F10 (in Angelholm) and a squadron of the F21 (in Lulea). The S35E, a tactical reconnaissance version, flew on June 27, 1963; sixty devices left the factory and took a battery of five OMERA cameras inside a new metal and glass cone (replacing the nose radar); empty, weighed 7,311 kg; fully loaded, 9,930 kg.
 
CR7sLtx.jpg
Draken J 35F brakes on stretch of road, in photo of October 1968 (Hans-Olov Arpfors)
 
The final interception version, the J-35F, flew in 1961. It differs from the others by the Ericsson PS-01 / A radar, which provided a much larger detection range, Saab S7B collision course fire control, a single cannon ( replaced the left one by electronic equipment), a Hughes infrared sensor under the nose, with precision of shot of 19 to 30km, and Hughes Falcon missiles manufactured under license. The Swedish designation of the Falcon is RB-27 for the semi-active radar version and RB-28 for the infrared guider. The J-35F also featured a new zero-zero canopy seat and ejector seat for the S35E. 220 equipment was produced to equip eight hunting regiments (F1, 3, 10, 12, 13, 16, 17 and 21). In a program to extend the useful life of this model, announced in 1980, about seventy J-35F would have been refurbished and modernized to keep three regiments in operation by 1995.
 
Specifications (J 35 and its A/B/F versions)
Spoiler

Features: This is version F
Type: monoplace interceptor.
Propulsion: Turbojet Volvo Flygmotor RM 6C (Rolls-Royce RB.146 Avon serie 300, manufactured under license), of 7,830 kg of thrust with afterburner or 5,765 kg of simple thrust.
Performance: Maximum speed without load, 2,125 km / h (or Mach 2), at 11,000m; 1,800 km / h (Mach 1,7), with four missiles; maximum rise ratio without external load, 12,000 m / min; approximate service ceiling, 20,000m; radius of action (high-low-high), 560km with internal fuel, or 960km with auxiliary tanks.
Weights: Empty, 7,425 kg; takeoff liquid without external load, 9.89m; area alar, 49.2sqm.
Weapons: a 30mm Aden M / 55 cannon with ninety projectiles on the right wing, two Falcon RB 27 semi-active radar missiles and two RB 28 infrared guidance Falcon; for ground attack, two bombs of 500 kg or nine of 100 kg or twelve Bofors rockets of 13.5 cm in diameter.

version: J35A

https://www.aef.se/Flygvapnet/Notiser/J35A_Notis_2.htm

version: J35B

https://www.aef.se/Flygvapnet/Notiser/J35B_Notis_2.htm

 
https://i.imgur.com/VUcYUY9.png
Edited by pieve
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  • Senior Suggestion Moderator

Open for discussion. :salute:

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We'll almost certainly see this at some point if we get a Swedish tree.  iirc one of the Dev Q&As confirmed that they're at least looking into the possibility of adding one, but that doesn't guarantee it'll happen necessarily.

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9 hours ago, Z3r0_ said:

We'll almost certainly see this at some point if we get a Swedish tree.  iirc one of the Dev Q&As confirmed that they're at least looking into the possibility of adding one, but that doesn't guarantee it'll happen necessarily. 

Yes, they will come, but after the J-32 Lansen comes the Draken J-35, there is no other besides him

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  • 2 months later...
  • 4 weeks later...
  • 3 weeks later...

+1.

 

Personally, I think it's too early to make suggestions for the Swedish tree. As the tree will be released next update, and we could already be getting this plane.

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18 hours ago, Borotovas said:

+1.

 

Personally, I think it's too early to make suggestions for the Swedish tree. As the tree will be released next update, and we could already be getting this plane.

i'm pretty sure we'll have a draken next patch since it's comparable to what we have in game right now

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6 hours ago, MonkeyBussiness said:

i'm pretty sure we'll have a draken next patch since it's comparable to what we have in game right now

 

Yes, I think it's already going to be in the tree, without the suggestion.

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  • 2 weeks later...

 

This suggestion was made BEFORE the announcement of Sweden in "other nations" tab, on 4th of July as visible on the top. It has merely been moved by the mods. 

(was trying to quote the guy above me, didn't know how quotes worked and can't add a quote to this)

Edited by LalamaC_731
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So you know, one of the devs confirmed in the Russian dev server preview stream that the Draken (and Viggen) is in the works right now, but it won't be ready before 1.95 drops.  We'll probably see it in 1.97 or a later update.

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On 12/12/2019 at 13:39, Z3r0_ said:

So you know, one of the devs confirmed in the Russian dev server preview stream that the Draken (and Viggen) is in the works right now, but it won't be ready before 1.95 drops.  We'll probably see it in 1.97 or a later update.

Thats awesome to hear I can't wait to see those in game.
 

Though also can't help but feel 1.97 may have those and France still won't have a Mirage or Jaguar hrmmm and sweden goes right up to a Mach 2

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  • 2 weeks later...
  • Senior Suggestion Moderator

Suggestion passed to the developers for consideration.

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  • 2 months later...
  • Senior Suggestion Moderator

As the J 35 has been implemented with update 1.97 Viking Fury,

 

Moved to Implemented Suggestions.:salute:

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