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Postwar yugoslav projects

robertino

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Here will be listed the projects of the former SFRY, from the field of aviation, helicopter, missile and the other,

To begin with only the list, later follows a more detailed description of each individual

Ikarus 451 series
Ikarus 452
Novi avioni (supersonic)
VNH 90
bešlin B-12 B)
Jet-Like Trainer (JLT)
ikarus 214
ikarus 232
soko 522
moma 86
ikarus 453 (batman airplan) ;D ;D ;D
ikarus s-49 c/p prewar rogožarski ik-3
...
utva kobac :p

@hesham Thanks for the idea of creating a new topic
 

hesham

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Thank you Robertino,

and we will wait your work.
 

robertino

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The Ikarus 451 is a family of research aircraft designs built in Yugoslavia in the 1950s, all sharing the same basic airframe, but differing in powerplants and cockpit arrangements. One member of the family Ikarus 451M became the first domestically-built jet aircraft to fly in Yugoslavia, on 25 October 1952

232 Pionir
A small twin-engined prone-pilot research aircraft, powered by 2x 48 kW (65 hp) Walter Mikron III piston engines. (1 built)

S-451
A larger, more powerful version of the Pionir, powered by 2x 120 kW (160 hp) Walter Minor 6-III piston engines and also incorporating a prone pilot cockpit. (1 built)

S-451M
(Mlazni - Jet) Derived directly from the S-451 airframe, the S-451M substituted Turbomeca Palas turbojet engines for the piston engines, in underslung nacelles at the same positions on the wing and conventional cockpit.

S-451M Zolja
(Zolja - Wasp) Flown in 1954, the S-451M Zolja featured a stretched fuselage, folding wings, and engine nacelles centred on the wing chordline. Powered by 2x 1.57 kN (353 lbf) Turbomeca Palas 056A turbojet engines, the S-451M was used to set a world speed record in its class in 1960.

Ikarus J-451MM Stršljen II from 1956 (J-451MM Hornet) on display at the Museum of Aviation
J-451MM Stršljen
(J - Jurisnik - close support) (Stršljen - Hornet)The intended production close support version with tricycle undercarriage, Turbomeca Marbore engines and cannon armament. (1 built).

S-451MM Matica
(Matica - Queen bee) Two-seat trainer version, used for a world speed record in 1957.

T-451MM Stršljen II
A single seat aerobatic trainer.

The 451, 451M, and J-451MM are all preserved at the Museum of Aviation in Belgrade.

updajte: wikipedija https://en.wikipedia.org/wiki/Ikarus_451
 

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hesham

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Wow,very good start.
 

robertino

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ikarus 452
Bešlin`s lightweight experimental jet interceptor V-452-2

The Ikarus 452 was an experimental jet aircraft built in Yugoslavia in 1953. It was a stubby mid-wing cantilever monoplane of pod-and-boom configuration, with twin jets mounted one atop the other at the rear of the fuselage nacelle, with separate intakes for the lower engine (in the wing roots) and the upper engine (on the sides of the rear fuselage). The twin tails and horizontal stabiliser were carried at the ends of booms that extended rearwards from the wings, with a short fin extending from the top of the rear fuselage to also meet the stabiliser. The flying surfaces were sharply swept, and construction throughout was of an experimental alloy.

Flight testing was carried out from mid 1953, with experience from the programme providing a basis for the production of the Soko Galeb.

General characteristics

Crew: One pilot
Length: 5.97 m (19 ft 7 in)
Wingspan: 5.25 m (17 ft 2 in)
Height: 1.77 m (5 ft 9 in)
Gross weight: 1,100 kg (2,420 lb)
Powerplant: 2 × Turbomeca Palas 056A, 1.5 kN (330 lbf) thrust each
Performance

Maximum speed: 780 km/h (466 mph)
Endurance: 1 hours 15 min

from wikipedia
https://www.mycity-military.com/Avioni/Beslinov-laki-eksperimentalni-presretac-V-452-2.html
 

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hesham

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Many thanks Robertino.
 

robertino

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hesham said:
Many thanks Robertino.
thanks, no problem

SOKO NOVI AVION New Aeroplane


The Novi Avion (Serbian Cyrillic:Нови Aвион English: New Aeroplane) was a 4th-generation, supersonic multi-role combat aircraft project of cropped delta-canard configuration. The work was undertaken by the Vazduhoplovno Tehnicki Institut (VTI) (Aeronautical Technical Institute) of Belgrade, the former Yugoslavia's main military-technical institute, but cancelled just before production began in 1991.


Specifications
Orthographically projected diagram of the Novi Avion

General characteristics
Crew: 1
Length: 13.75 m (45.1 ft)
Wingspan: 8.00 m (26.2 ft)
Height: 4.87 m (15.9 ft)
Wing area: 30 m² (322.9 sq.ft)
Empty weight: 6,247 kg (13,772 lb)
Max. takeoff weight: 13,400 kg (29,542 lb)
Powerplant: 1 × Snecma M88 turbofan
Dry thrust: 50.04 kN (11,250 lbf)
Thrust with afterburner: 75.62 kN (17,000 lbf)

Performance
Maximum speed: Mach 1.88 (1,243 mph [2,000 km/h])
Range: 3,765 km (2,339 mi)
Service ceiling: 17,000 m (55,775 ft)
Rate of climb: 16,500 m/min ()
Wing loading: 446.67 kg/m² ()

Armament
Guns: 1× 30 mm cannon
Hardpoints: 11 total (including 2× wing-tip hardpoints for infra-red homing air-to-air missiles)

Avionics
Fire-control radar
Digital flight control system
Multi-function navigation/attack system
Glass cockpit

links
https://en.wikipedia.org/wiki/Novi_Avion
http://vazduhoplovnetradicijesrbije.rs/index.php/clanak/32-novi-avion
https://www.youtube.com/watch?v=y1QjOxEFqOA
https://www.militaryfactory.com/aircraft/detail.asp?aircraft_id=749
http://www.globalsecurity.org/military/world/serbia/novi-avion.htm
https://www.mycity-military.com/Avioni/YU-Supersonic.html (serbian forum)
 

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hesham

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Many thanks Robertino.
 

dan_inbox

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Yugoslavia's Novi Avion has already a big thread in this forum:
www.secretprojects.co.uk/forum/index.php/topic,442.0.html
 

robertino

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dan_inbox said:
Yugoslavia's Novi Avion has already a big thread in this forum:
www.secretprojects.co.uk/forum/index.php/topic,442.0.html
thank you

I forgot to put a link :-[
 

robertino

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VNH90 multi-role helicopter 90
;)
multi-role helicopter planed for production in former Yugoslavia. Plans were presented in 1987., and it should have been in use by 1996

https://www.youtube.com/watch?v=2Myn2tujaVo
...
more on
http://www.secretprojects.co.uk/forum/index.php/topic,13989.0/nowap.html

other site
http://www.paluba.info/smf/index.php?topic=11808.0
https://tnh.me/554bfdb9067d7b7a08a4abde
https://www.mycity-military.com/Helikopteri/Namenski-projekti-do-1992-VNH-90-i-drugi.html
 

hesham

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Nice Video,thank you Robertino.
 

robertino

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Not to write the same again

It's on our page about Bešlin models

http://www.secretprojects.co.uk/forum/index.php/topic,15580.0/all.html
 

hesham

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Nice work my dear Motocar.
 

robertino

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idemo dalje ;D

bešlinovi avioni
Beslin airplane projekt : https://www.secretprojects.co.uk/forum/index.php/topic,15580.0.html

The B-12 is the first home-based project with a thin, winged wing, a "bicycle" trap, designed for a flyover and oversized flight. It was not realistic, as even in developed countries, at that time, the phenomenon of overhanging and superstitious aerodynamics was not yet sufficiently clarified. Yugoslav experts were particularly lagging behind, and there was no laboratory support for that speed range. For these reasons the program has been interrupted during its prototype development.

https://sr.wikipedia.org/sr-el/%D0%90%D0%B2%D0%B8%D0%BE%D0%BD_%D0%91-12

https://www.facebook.com/pg/OfficialSerbianTeam/photos/?tab=album&album_id=134326273426539

there is not much information about the model
after the normalization of relations with the USSR has dropped from development

next week I will go further
 

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hesham

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Many thanks,and we will wait.
 

Petrus

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PROJECTS OF YUGOSLAV LIGHT FIGHER IN THE MID-1950S

The ten-year plan for the development of the JRV (the Yugoslav Air Force) provided for development and introduction into service of a light fighter that was supposed to be a counterpart to the then contemporary British Midget ultra-light fighter. Three projects B-12-V, ML-1 and PL-1 were submitten on the competition announced by the JRV Command. The project of Bešlin’s light fighter B-12-V went to the farthest distance, but it was not pass to the prototype phase. Instead, two British Gnat Mk. 1 were purchased.

B-12-V Bešlin’s light fighter

The Yugoslav Air Force received its first jet aircraft T-33A on 10 March 1953 and on 9 June 1953 the first F-84G fighter-bombers arrived.
The ten-year plan (1953-1962) envisaged the construction of 3 B-12 aircraft in 1955. However, this plan did not include the possible production of this aircraft if it succeeds in being adopted. However, the prototype of the B-12 aircraft was still under construction in 1955. By the end of 1957, the making of a mock-up was completed and about 50% of the prototype was made.
At the time when military aid from the West was stopped in 1957, the B-12 model was in the supersonic tunnel in the UK (since at that time there was still no supersonic tunnel in Yugoslavia). As the survey of the model yielded unsatisfactory results, the development was discontinued. The variant B-12-OR remained in the study phase.

B-12 data:

takeoff weight 2256 kg,
wing area 10.9 sq.m
wing loading 207 kg/sq.m.
aspect ratio 5.0
wingspan 6.6 m
sweep angle 45 degrees
the narrowing of the wing 2.3
average chord 1.65 m.

[My understating is that B-12-V was to have two Viper engines and B-12-OR - one Orpheus]

ML-1 light fighter

The ML-1 light fighter was to be equipped with the ARDAG engine. The static thrust of this engine was to be 2500 kp and its weight 1000 kg.

ML-1 data:

takeoff weight 5380 kg
wing area 23.0 sq.m
wing loading 235 kg /sq.m
thrust-to-weight ratio 0.47
aspect ratio 3.35
wingspan 8.76 m
sweep angle 43 degrees
taper ratio 2.3
average chord 2.63 m
chord at the axis of symmetry 3.66 m
chord at wingtips 1.59 m
thickness-to-chord ratio 8%
armament 4 20 mm guns (100 rounds per gun)
maximum speed at the sea level 1070 kph (Mach number 0.872) for take-off mode
1004 kph (Mach number 0.818) for maximum permanent regime
rate of climb speed at sea level 43.7 mps
max. altitude 14000 m (with the assumption that 50% of the fuel is used for climbing 14600 m)

PL-1 light fighter

The PL-1 was to be equipped with two Hispano R.800A turbojet engines. The static thrust of each of the engines was 1100 kp or 1450 kp (with afterburner).

PL-1 data:

takeoff weight 4370 kg
wing area 19 sq.m
wing loading 230 kg/sq.m
thrust-to-weight ratio 0.5 or 0.66
aspect ratio 3.35
wingspan 7.97 m
sweep angle 43 degress
taper ratio 2.1
average chord 2.38 m
chord at axis of symmetry 3.22 m
chord at wingtips 1.535 m
thickness-to-chord ratio 8.0%
armament three 20 mm guns (100 rounds per gun)
internal fuel 1000 kg
maximum speed at sea level was 1153 kph (Mach number 0.94) for the take-off mode and 1120 kph (Mach number 0.923) for the maximum permanent regime.
Rate of climb at sea level (thrust = 1100 kp) 49.6 mps
Rate of climb at level (thrust with afterburner 1450 kp) 78.5 mps
Max. altitude 15300 m (with the assumption that 50% of the fuel is used for climbing 16080 m)

SOURCE:
Небојша Ђокић, Авиони конструкторске групе Бешлина, Шумадијски анали 8, Крагујевац 2015, 146 - 179 ;
Nebojša Đokić, AIRCRAFT OF BEŠLIN DESIGN GROUP, Shumadian Annals No 8, Kragujevac 2015, pp. 146 - 179

https://www.academia.edu/28045986/%D0%9D%D0%B5%D0%B1%D0%BE%D1%98%D1%88%D0%B0_%D0%82%D0%BE%D0%BA%D0%B8%D1%9B_%D0%90%D0%B2%D0%B8%D0%BE%D0%BD%D0%B8_%D0%BA%D0%BE%D0%BD%D1%81%D1%82%D1%80%D1%83%D0%BA%D1%82%D0%BE%D1%80%D1%81%D0%BA%D0%B5_%D0%B3%D1%80%D1%83%D0%BF%D0%B5_%D0%91%D0%B5%D1%88%D0%BB%D0%B8%D0%BD%D0%B0_%D0%A8%D1%83%D0%BC%D0%B0%D0%B4%D0%B8%D1%98%D1%81%D0%BA%D0%B8_%D0%B0%D0%BD%D0%B0%D0%BB%D0%B8_8_%D0%9A%D1%80%D0%B0%D0%B3%D1%83%D1%98%D0%B5%D0%B2%D0%B0%D1%86_2015_146_-_179_Neboj%C5%A1a_%C4%90oki%C4%87_AIRCRAFT_OF_BE%C5%A0LIN_DESIGN_GROUP_Shumadian_Anals_No_8_Kragujevac_2015_146_-_179
 

hesham

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Amazing find my dear Petrus,

and of course the B-12 was belonged to Government Aircraft Factories,which was the other
two companies ?.

Please can you send to me this PDF ?,and thanks.
 

Petrus

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The ML-1 light fighter was to be equipped with the ARDAG engine. The static thrust of this engine was to be 2500 kp and its weight 1000 kg.
As for the ARDAG engine, its actual designation was DMB / ARDAG M-3.
Here you've go info on the engine and photos from https://www.muzejvazduhoplovstva.org.rs/izlozeni_motori.php?jez=eng&id=84:

Early fifties Yugoslav Air Force showed interest in development of a domestic turbo jet engine, to be eventually built in a new Yugoslav aircraft – subsonic fighter-bomber, because purchasing proper engine abroad was practically impossible. Therefore it was agreed a contract with the Swiss firm ARDAG, employing German engineers, which in during the W.W.II developed design of jet engines for Luftwaffe. The contract relates to development and manufacturing of a prototype of turbo jet engine with axial compressor and axial turbine, under a designation M-3, of static thrust between 1600 and 200 daN, ARDAG being obliged to deliver by phases documentation to the VTI, according which the special experimental section in composition of the engine factory at Rakovica should make and test engine’s assembly. On the bases of achieved results ARDAG would, if needed, re-make documentation, so the building and testing of engine prototype would be done. If results of prototype testing confirmed required parameters, the series production at the firm DMB would start.

Though the factory at Rakovica already built under license Turbomeca turbo jet engine type Palace, manufacturing of M-3 parts was a great challenge, because it was a much m ore bigger and stronger engine, with different type of compressor. An extra problem represented examination of particular components. For example, needed power of electro engine which during test drove engine’s axial compressor, was 15 to 25 MW, what was above available strength of city’s power net. Therefore testing of compressor was done between 2 and 3 o’clock, when the peak of city’s loading was the less.

Even though M-3 was a generation ahead of the then existing in the world turbo props, late 1957 project was abandoned, because it’s complete development and entering series production were not economical, regarding estimated needs for that engine. Moreover, engines cross section was to large to be built into a jet trainer plane, project already prepared by Yugoslav designers. Anyway, M-3 was among strongest turbo jet engines in Europe that time

Description: turbo jet with axial compressor and axial turbine

Operating characteristics: Static thrust between 1600 and 2000 daN

Turbine inlet temperature: unknown

Dimensions
Radius 0.83 m
length 3,12 m

Weight
unknown
Note that the source for the ML-1 light fighter gave information on the engine's thrust and weight.

Piotr
 

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hesham

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Thank you my dear Petrus,

but can I ask yo if those three Project were all from Ikarus ?.
 

Aubi

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I expect it to be FOR Ikarus, not from Ikarus. I expect Yugoslavian industry worked similar to other socialist countries, with design bureaus mostly independent of factories and their product then assigned to specific factory. Also, prototypes were often built by different factory than the series. Anyway, all other Bešlin's machines were built at Ikarus, so it's safe to put all his projects inti this pile.
The aforementioned pdf, Авиони конструкторске групе Бешлина:
 

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