Yugoslavia Air Force


Title: Jugoslovensko Kraljevsko Ratno Vazduhoplovsto
Title in English: Royal Yugoslav Air Force
Abbreviation: JKRV

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History


Narrative Summary:
A small Serbian Military Aviation unit was first formed in December 1912, with French-trained Army officers. The unit saw active service in the Second Balkan War, flying reconnaissance operations. On 29 July 1914, Serbia joined the First World War against Austro-Hungary. Serbian aviators soon undertook artillery spotting missions over the front line. Although supported by French aircraft and pilots, in late 1915 a new offensive by Austrian and Bulgarian forces quickly overwhelmed the country. A new Serbian Military Air Service was formed in Greece, with French training and equipment. In early 1918 the first French-Serb units were transferred to Serbian control. These units operated successfully until the liberation of Serbia in late Autumn 1918.

With the establishment of the Kingdom of Serbs, Croats and Slovenes (Kingdom of SHS), an Army Aviation Department was formed with Serbian and ex-Austro-Hungarian (Croatian and Slovenian) personnel. In 1923 a major initiative was launched to replace the WW1 era aircraft still in service with more modern designs. Contracts were placed abroad and with newly established local factories. Later in 1923 the Aviation Department was renamed Aviation Command and placed directly under the control of the Ministartstvo vojske i mornarice (Ministry of War and Marine). In 1930, the Aviation Command was renamed the Jugoslovensko Ratno Vazduhoplovsto (JKRV). The air arm was also known as the Vazduhoplovsto vojske kraljevine Jugoslavije (Air Force of the Army of the Kingdom of Yugoslavia) - VVKJ.

During 1940 Britain supplied significant military aid to the JKRV, to strengthen its forces against the increasing German threat. In early March 1941 Luftwaffe forces started arriving in neighbouring Bulgaria. On 12 March 1941 JKRV units began to deploy to their wartime airfields. The overthrow of the pro-German government in Belgrade on 27 March brought an end to hopes of a settlement with Germany. On 6 April 1941 Luftwaffe units in Bulgaria and Romania attacked Yugoslavia. Equipped with a combination of obsolete equipment and new aircraft still being introduced into service, the JKRV was forced to defend the country's long borders against multiple attacks from many directions. The dubious loyalty of some military personnel did not help matters. Yugoslav fighter aircraft and anti-aircraft artillery brought down about 100 enemy aircraft, but defending forces were unable to make any significant impact on the enemy advance. On 17th April 1941 the Yugoslav government surrendered. Several JKRV aircraft escaped to Egypt via Greece, and the crews then served with the RAF.
Key Dates:
November 1902 Engineering Captain Kosta Miletic returns from St. Petersburg after finishing Aeronautical Technical School
late 1909 2 balloons and a hydrogen station delivered
February 1912 Ministry of War issues a call for candidates to be sent to France for training as pilots. Six Army officers are selected.
23 July 1912 Mihajlo Petrovic receives FAI certificate No. 979, becoming the first Serbian military pilot
September 1912 Order for 8 aircraft, hangars and spare parts placed in France, with 2 more aircraft ordered in Russia
24 December 1912 War Minister Radomir Putnik issues a decree establishing the Aviation Command (Vazduhoplovna Komanda)
29 March 1913 Lieutenant Zivojin Stankovic and Sergeant Miodrag Tomic make first successful combat mission. For 45 minutes they observed Turkish positions in the city of Skadar (Scutari)
29 July 1914 Start of WW1. Serbian air units undertake artillery spotting duties
May 1915 Single French Escadrille arrives to assist Serbian air operations
mid-1915 First pilot school in Serbia established at Pozarevac
November 1915 Invasion and occupation of Serbia by Bulgaria. Serbian aviators forced to escape abroad
1916 French Air Force establishes the first Serb-manned Escadrilles in Greece
early 1918 Srpska Avijatika (Serbian Aviation) established from Serbian-French units
1918 Odeljenjie za Vozduhoplovsto (Aviation Department) created by Kingdom of SHS Army
early 1923 Purchasing commission visits UK and France to select new service aircraft
9 August 1923? Vazduhoplovsto Komanda (Aviation Command) created directly under Ministry of War and Marine
11 October 1923 IKARUS, first Yugoslav aircraft factory, is established at Novi Sad
28 March 1924 First locally produced aircraft, SB-1 from Ikarus, were delivered to Air Force
1930 Military Aviation Command separated from Naval Aviation Command
1930 Military Aviation Command renamed Jugoslovensko Kraljevsko Ratno Vazduhoplovstvo (Royal Yugoslav Air Force)
1938 Start of major reorganisation of Air Force units
1940 Army Air Force established
6 March 1941 Covert mobilisation launched
12 March 1941 Deployment to reserve airfields begins
22 March 1941 Air Force put on highest state of alert
25 March 1941 Tripartite Pact signed with Germany
27 March 1941 Pro-German government overthrown in military coup
6 April 1941 Nazi forces attacked Yugoslavia, with heavy bombing of capital Belgrade. Despite German and Italian superiority (6:1) and treason pilots fought bravely. For 9 days they flew over 1400 sorties, downing 90 enemy aircraft.
17 April 1941 Yugoslav Government surrenders. After capitulation some crews with their aircraft flew to Egypt and joined the Allied forces


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Markings

National Insignia:
National Markings

Aircraft Serial Numbering System(s):
Aircraft operated 1912-1915 either retained the number applied by the supplier, or were left un-numbered. During the period 1916-1918 the French Air Force numbering system was used (i.e. manufacturers construction numbers). After the creation of Yugoslavia in 1918, aircraft initially retained their existing identities - whether French, Austro-Hungarian, Italian or the manufacturers. Circa 1929 an official serial numbering system was introduced. Each aircraft type was allocated a batch of numbers starting at 01 (or 51 if the batch was expected to be small) and increasing sequentially. There were no 'black-out' blocks to disguise the total number acquired, unlike in some other countries. Examples of these Evidence Numbers (abbreviated Ev.br.) are given in the table below:
Rogozarski SIM X 301+
Rogozarski PVT 501+
Fizir FP-2 601+
Rogozarski R-100 701+
RWD 13 751+
Messerschmitt Bf 108 771+
Fieseler Fi 156 801+
Potez 630 2071+
Ikarus IK-2 2101+
Rogozarski IK-3 2151+
Hawker Hurricane 2301+
Messerchmitt Bf 109E 2501+
Junkers G.24 3201+
Dornier Do 17 3301+
Bristol Blenheim 3501+
Savoia Marchetti SM.79 3701+
Fizir FN 9001+


This list appears to show Trainers and other Second-Line aircraft in the range 1-1000, Fighters in the range 2001-3000 and Bombers and Transports in the range 3001-4000. No official records of JKRV serial numbers survived WW2, so any published information is based on compilations of various fragmentary sources.

Note: Aircraft carrying fuselage codes such as D-4 for a Junkers G.24, S-08 for a Bf 108 and L-8 for a Bf 109E are actually temporary German civilian registrations for use during the ferry flight to Yugoslavia.

Unit/Base Aircraft Code System(s):
Unit badges were not normally displayed on aircraft although some Potez 25 units carried an insignia on the fuselage side (and/or on the fin), consisting of a simple geometric shape - such as a disc, triangle or diamond shape in white (sometimes outlined in black). On some aircraft an additional geometric shape was added in black in the centre of the white marking, such as a star.

During the 1930s a tactical unit coding system was used, consisting of a single letter of the alphabet, e.g. 'C', indicating the parent Puk (Regiment) or School of each aircraft. The letter was displayed on the Potez 25 on the lower surface of the upper wing at each wing tip. The Potez 25 had a shorter span lower wing, enabling the letters to be seen from the ground - the usage on other aircraft is unknown at present. These codes appear to have been discontinued after 1938. The codes used were:
Letter Airfield Unit
N Novi Sad 1. Puk
R Rajlovac-Sarajevo 2. Puk
S Skoplje 3. Puk
Z Zagreb-Borongaj 4. Puk
M Medocevac-Nis 5. Puk
B Belgrade-Zemun 6. Puk
J Jasenice-Mostar 7. Puk
C Bela Crkva Bombing School
K Kraljevo Technical Centre




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Aircraft

Aircraft Designation System(s):
No formal designation system used. Locally designed aircraft were named after the initials of their designers. Imported aircraft used the manufacturer's designation.

All-Time Aircraft Used List:
Alphabetical Order --- Chronological Order

Impressed Civilian Aircraft

Aircraft NOT Used:
False reports of aircraft on order or in service

Aircraft Losses and Incidents:
Aircraft Accidents - no information.



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Organisation



Main Headquarters:
Ljesnica

Organisational Structure:
The Serbian Air Force started out in 1912 as an Aeroplane Flight and a Balloon Flight with the Serbian Army, and this arrangement remained until the Austro-Hungarian occupation in 1915. From 1916 the Serbian air arm was effectively a unit of the French Air Force, and the individual Escadrilles operated under French control. By mid 1918 direct control of two of these units had passed to Serbia, and the remaining units passed to Serbian control at the end of the war, in November. Squadrons from Serbia and Slovenia combined to form the initial strength of what became the Yugoslav Air Force. Additional squadrons were formed using aircraft captured from Austro-Hungarian forces and unlicenced copies of these aircraft.

By 1926 the air force was organised into two Air Commands (Vazduhoplovna Komanda), with HQs in Serbia and Bosnia, each with six Squadrons (Eskadrila) - fighter, bomber or reconnaissance - and a Pilot's School. The two Commands were later redesignated as Regiments (Puk) and within ten years the air force had expanded to 6 Regiments, each comprising 2 or 3 Groups (Grupa), formed from 2 or 3 Squadrons (Eskadrila). The air force was still primarily an army support organisation, with the roughly equal split of fighter, bomber and reconnaissance units maintained. In 1938 a re-organisation plan was launched that was intended to create a 9 Regiment air force, each with 3 Grupa of 3 Eskadrila, by 1943. As part of this plan, the JKRV was divided in 1940 into three parts: Operativno vazduhoplovstvo (Operational Air Force) with front-line and direct support units; Armijsko Vazduhoplovstvo (Army Air Force) for tactical support of the army; and Pozadinsko vazduhoplovstvo (Rear-Echelon Air Force) comprising training, testing and replacement squadrons. This structure was not fully in place until spring 1941, and in places still equipped with completely obsolete equipment.

Historical Orders of Battle:
Order of Battle listings

All-Time Flying Units List:
List of Units


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Air Bases

All-Time Air Bases Used List:
By 1940 the air force was operating from 15-20 major airfields. Since these were likely to be targeted by any aggressor, a dispersal plan was being developed. During the 12 months before the German invasion in April 1941, about 100 auxiliary airfields had been created, but only about 50 of these were ready for use when the time came. Even these suffered from poor drainage and were really only usable by light aircraft during wet weather.

Military Air Bases Listing


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More Information

Books:

Serbian Aviation Bibliography - to be added

Magazines:

LET No.1 (Yugoslav Aviation Museum, 1998)
LET No.2 (Yugoslav Aviation Museum, 2000)
Avions No.9-13 & 36

Websites:

YASIG Forum

Ex Yugoslavia and Serbia airplanes

Royal Yugoslavia Fighters

Dragan's Aviation Corner

Serbian Aviation 1912-1918

Pioneers of Serb Aviation

VVKJ i PV

Who was Sgt Mihajlo Petrovic?

History of the Serbian Air Force 1912-2005

YUModelClub: War Over Yugoslavia 1941

Vojska.net: WW2 in Yugoslavia

History of the Yugoslav Air Force

Air Force




Aircraft Types NOT Used
This page gives details of some of the aircraft types that were offered or promised to the Yugoslav/Serbia Air Force but not delivered, cancelled official orders, and types have been falsely reported as being in service.

Avia B.534
Fourteen of these Czech biplane fighters are reported by some sources to have served with the JKRV. This is not true.

Breguet 693
Reports of one Breguet 693 being delivered have not been confirmed.

Bristol Blenheim Mk.IV
The Mk.IV version was not supplied, although the Yugoslavs did convert a licence-built Mk.I with a locally manufactured a nose section similar that used on the Mk.IV.

Bristol Beaufighter
A Bristol Beaufighter was not supplied to the JKRV.

Caudron CR.714
20 CR.714s were ordered, but had not been built by the time of the May 1940 German attack on France.

Caproni Ca 310bis
There was only ever one Caproni Ca 310bis - a prototype for the Ca 311 - so 12 could not have been delivered.

Caudron G.3 and G.4
Reports of the Caudron G.3 & G.4 being used by Serbia in WW1 are not confirmed.

Dewoitine (Zmaj) D.500
The Dewoitine D.500 was not licence-built by Zmaj and none were received from France.

Dewoitine (Zmaj) D.513/D.514
These prototype fighters were not licence-built by Zmaj and none were received from France.

Farman F.41
Possible confusion with the F.40, which was supplied.

Farman F.60 Goliath
Not used by Serbia or Yugoslavia.

Farman F.306
This type was actually used by the civil airline Aeroput.

Fizir FT-1 Nebojsa
This pre-WW2 single-engined low-wing monoplane, ("Fizir-Nebojsa") was civilian only, with the registration YU-PDV.

Fizir LAF
The pre-WW2 civil only sport aircraft was not used by the JKRV.

Fleet 10
This type was not used by the JKRV. It was actually used by the Yugoslav Navy.

Hawker Hart
Some sources report six Harts in service in 1936. "Hawker Aircraft Since 1920" (Putnam) states: In 1931 Yugoslavia had ordered four Harts, and 4 Harts were based at Novi Sad towards end of 1931, but no record of their manufacture exists, so they were probably RAF aircraft on temporary detachment.

Ikarus B-5 Pionir
The single B-5 Pionir was not used by the JKRV.

Ikarus IK-10
The Ikarus IK-10 was not used by the JKRV.

Lockheed 10A Electra
The seven aircraft sometimes reported with the JKRV were actually operated by the civil airline Aeroput.

PZL P.24
The P.24 was not used by the JKRV.

PZL P.37 Los
During the spring and summer of 1939 Yugoslavia ordered 20 Los Cs, but these were not delivered before the German invasion of Poland.

Rogozarski PSFA
PSFA-Rogozarski (PSFA = First Serbian Aircraft Factory) is actually the formal name of the company, not an aircraft type.

Voisin III/Voisin LA
This type was not used by Serbia.

Voisin IV/Voisin LB
This type was not used by Serbia.

Westland Lysander
A JKRV order for two Mk.IIs not fulfilled.

Military Air Bases and Airfields
This page gives details of the air bases and airfields which were used by the Yugoslav Air Force or Serbian Air Force before World War 2.

Banja Luka (Bosnia & Hercegovina)
The second largest town in Bosnia & Hercegovina. For airfield see ?

Belgrade (Serbia)
Belgrade Airport. Located 18 km (11 miles) from Belgrade. Used in April 1941.

Bela Crkva (Serbia)
Located east of Belgrade, very close to the Romanian border. Air Base No.31 in 1937.

Bihac (Bosnia & Hercegovina)
Located west of Banja Luka.

Bjeljina (Serbia)
Located 60 miles west of Belgrade. Home of the 62. (Bomber) Grupa and Headquarters of 61. (Bomber) Grupa in April 1941.

Bojnik (Serbia)
Located near Leskovac, 10 miles from Kosancic. Reserve airfield. Home of 33 and 34 Fighter Grupa in April 1941.

Bosanski Aleksandrovac (Croatia)
Located near Banja Luka. Home of 33. and 34. (Fighter) Grupa in April 1941.

Brege (Croatia)
Also spelled Brega. Located near Brezice, 22 miles northwest of Zagreb. Home of the 6. VIGrupa of Army Aviation in April 1941.

Brnik (Slovenia)
Also known as Ljubljana Airport. Located north of Ljubljana.

Butmir (Bosnia & Hercegovina)
Located just west of Sarajevo. The main military airfield for Sarajevo.

Cerklje (Slovenia)
Located in western Slovenia. Home of the 6. VIGrupa of Army Aviation in April 1941.

Davidovac (Serbia)
Located in the Morava valley, 45 miles from the Bulgarian border. Home of the 201. and 202. Eskadrila of 61. (Bomber) Grupa in April 1941.

Djakovo (Bosnia & Hercegovina)
Located between Brod and Vukovar. Used in April 1941. (Some sources report this airfield in Slovenia).

Gorobilje (Serbia)
Located near Uzicka Pozega. Home of the 67. (Bomber) Grupa in April 1941.

Jasenica (Bosnia & Hercegovina)
Also spelled Jesenice. Located just north of Mostar. Home of the Samostalna Izvidjacka Eskadrila of Army Aviation in April 1941.

Jugovicevo (Serbia)
Located near Novi Sad.

Klemak (Serbia?)
Location not known.

Knic (Serbia)
Home of 52. (Fighter) Grupa and headquarters of 31. (Fighter) Grupa in April 1941.

Konjar (Macedonia)
Located near Prilep. Temporary fighter base in November 1940.

Kosancic (Serbia)
Located near Leskovac. Home of the 35. (Fighter) Grupa in April 1941.

Kraljevo (Serbia)
Located south of Belgrade and due east of Sarajevo. Built in the 1930s. Air Base No.32 in 1937. Headquarters of the 2. (Fighter) Puk in April 1941.

Lazarevac (Serbia)
Located 25 miles south of Zemun, about 30 km from Belgrade. Home of 201 Training Grupa in April 1941.

Ljesnica (Bosnia & Hercegovina)
Home of 701 Esk VZ in April 1941.

Ljubic (Bosnia & Hercegovina)
Located near Cacak. Headquarters of 4. Brigada and home of the 705. Eskadrila VZ in April 1941

Ljubljana (Slovenia)
The Slovenian capital city. For airfield see Brnik.

Majur (Croatia)
Located near Sabac, 22 miles south of Veliki Radinci. Used in April 1941.

Mostar-Kosor (Bosnia & Hercegovina)
Located in Hercegovina, south west of Sarajevo. Built in the 1930s. Home of the Independent Fighter Eskadrila in April 1941.

Mostar-Ortijes (Bosnia & Hercegovina)
Located in Hercegovina, south west of Sarajevo. Built in the 1930s. Air Base No.7 in 1937. Headquarters of the 7. (Bomber) Puk and 81. (Bomber) Grupa in April 1941.

Niksic (Montenegro)
Located northwest of Podgorica. Also known as Kapino Polje airfield.

Nis (Serbia)
Also spelled Nish. Located in South eastern Serbia, south east of Belgrade, towards the Bulgarian border. Air Base No.5 from 1937. Headquarters of 5. (Fighter) Puk and home of 754. Eskadrila in April 1941.

Nova Topola (Bosnia & Hercegovina)
Location ? Headquarters of 2. Brigada and home of the 703. Eskadrila VZ in April 1941.

Novi Sad (Serbia)
First built in the 1920s. Located north west of Belgrade. Air Base No.1 from 1937. Headquarters of 1. (Bomber) Puk in April 1941.

Obilic (Serbia)
Located near Pristina. Home of the 208. and 210. Eskadrila of 64. (Bomber) Grupa in April 1941.

Pancevo (Serbia)
Located just north east of Belgrade. Air Base No.9 in 1937.

Petrovac (Macedonia)
Also spelled Petrovec. Located north of and close to Skopje. Built in the 1930s. Home to the 63. (Bomber) Grupa and headquarters of 64. (Bomber) Grupa in April 1941.

Pleso (Croatia)
Located just south east of Zagreb. Also called Velika Gorica.

Podgorica (Montenegro)
Capital city of Montenegro. For airfield see Golubovci. Used in April 1941

Preljina (Serbia)
Located near Cacak. Home of the 66. (Bomber) Grupa in April 1941.

Prijedor (Bosnia & Hercegovina)
Located west of Banja Luka. Used in April 1941.

Pristina-Stubol (Serbia)
Located near Urosevac in Kosovo. Home of the 209. Eskadrila of 64. (Bomber) Grupa and 704. Eskadrila VZ in April 1941.

Prnjavor (Bosnia & Hercegovina)
Home of the 32. (Fighter) Grupa in April 1941.

Rajlovac (Bosnia & Hercegovina)
Located north-west of and close to Sarajevo, the Bosnia and Herzegovina capital. Air Base No.2 from 1937.

Rezanovacka Kosa (Serbia)
Located near Kumanovo. Home of the 36. (Fighter) Grupa in April 1941.

Rovine (Bosnia & Hercegovina)
Located in the Banja Luka area of western Bosnia. Home of the 68. and 69. (Bomber) Grupa in April 1941.

Ruma (Serbia)
A small town about 50 km west from Belgrade. Home of the 1. VIGrupa of Army Aviation in April 1941.

Sarajevo (Bosnia & Hercegovina)
Also known as Rajlovac. Built in the 1930s. Airport located south west and close to Sarajevo.

Skoplje (Macedonia)
Capital city of Macedonia. Air Base No.3 from 1937. Headquarters of 3. (Bomber) Puk in April 1941. For airfield see Petrovac.

Smederevska Palanka (Serbia)
Home of the 7. VIGrupa of Army Aviation in April 1941. Located in central Serbia.

Sokolac (Bosnia & Hercegovina)
Located north east of Sarajevo, between Sarajevo and Srebrenica. Used in April 1941.

Sorlince (Serbia)
Near Leskovac. Home of the 2. VIGrupa of Army Aviation in April 1941.

Srem (?)
Located ? Used in April 1941. Srem is actually the name of a region, but 'Air War for Yugoslavia, Greece and Crete' p.222 refers to it as if it were a specific location.

Staro Topolje (Croatia)
Located near Djakovo. Home of the 3. VIGrupa of Army Aviation in April 1941.

Susicko Polje (Serbia)
Home of 31. (Fighter) Grupa in April 1941.

Tetovo (Macedonia)
Home of the 5. VIGrupa of Army Aviation in April 1941.

Trebinje (Bosnia & Hercegovina)
Located in the south east of Bosnia & Hercegovina, north east of Dubrovnik. Used as a trainer base in April 1941?

Trupalsko Polje (Serbia)
Located ? Home of Serb Army aviation 1912-1915.

Valjevo (Serbia)
Located south west of Belgrade, due south of Novi Sad, mid-way between Srebrenica and Belgrade. Home of the 3. Trenazna Skola.

Velika Gorica (Croatia)
Near Kurilovac, just south of Zagreb. See also Pleso. Home of the 4. VIGrupa of Army Aviation in April 1941.

Veliki Radinci (Serbia)
Veliki Radinci was a reserve airfield to Zemun airfield, the main base of air units defending Belgrade. Located 45 miles northwest of Belgrade. A village on Fruska Gora Mountain, Srem, between Ruma and Sremska Mitrovica. Headquarters of the 11. (Independent LR Recce) Grupa in April 1941.

Zagreb (Croatia)
Built in the 1930s. Near capital of Croatia. Not clear if this is Pleso or Lucko. Air Base No.4 from 1937. Headquarters of 4. (Fighter) Puk and 8. (Bomber) Puk in April 1941.

Zemun (Serbia)
Beograd-Zemun/Belgrade-Zemun. Zemun is located just north west of Belgrade. Zemun airfield was named "Dojno Polje". It was the first Belgrade airfield, for both civil and military purposes. Located very close to the built-up area of Belgrade. Air Base No.6 in 1937. Headquarters of 1. Brigada and 6. (Fighter) Puk. Home of 51. (Fighter) Grupa and 702. Eskadrila VZ in April 1941

Aircraft Types NOT Used
This page gives details of some of the aircraft types that were offered or promised to the Yugoslav/Serbia Air Force but not delivered, cancelled official orders, and types have been falsely reported as being in service.

Avia B.534
Fourteen of these Czech biplane fighters are reported by some sources to have served with the JKRV. This is not true.

Breguet 693
Reports of one Breguet 693 being delivered have not been confirmed.

Bristol Blenheim Mk.IV
The Mk.IV version was not supplied, although the Yugoslavs did convert a licence-built Mk.I with a locally manufactured a nose section similar that used on the Mk.IV.

Bristol Beaufighter
A Bristol Beaufighter was not supplied to the JKRV.

Caudron CR.714
20 CR.714s were ordered, but had not been built by the time of the May 1940 German attack on France.

Caproni Ca 310bis
There was only ever one Caproni Ca 310bis - a prototype for the Ca 311 - so 12 could not have been delivered.

Caudron G.3 and G.4
Reports of the Caudron G.3 & G.4 being used by Serbia in WW1 are not confirmed.

Dewoitine (Zmaj) D.500
The Dewoitine D.500 was not licence-built by Zmaj and none were received from France.

Dewoitine (Zmaj) D.513/D.514
These prototype fighters were not licence-built by Zmaj and none were received from France.

Farman F.41
Possible confusion with the F.40, which was supplied.

Farman F.60 Goliath
Not used by Serbia or Yugoslavia.

Farman F.306
This type was actually used by the civil airline Aeroput.

Fizir FT-1 Nebojsa
This pre-WW2 single-engined low-wing monoplane, ("Fizir-Nebojsa") was civilian only, with the registration YU-PDV.

Fizir LAF
The pre-WW2 civil only sport aircraft was not used by the JKRV.

Fleet 10
This type was not used by the JKRV. It was actually used by the Yugoslav Navy.

Hawker Hart
Some sources report six Harts in service in 1936. "Hawker Aircraft Since 1920" (Putnam) states: In 1931 Yugoslavia had ordered four Harts, and 4 Harts were based at Novi Sad towards end of 1931, but no record of their manufacture exists, so they were probably RAF aircraft on temporary detachment.

Ikarus B-5 Pionir
The single B-5 Pionir was not used by the JKRV.

Ikarus IK-10
The Ikarus IK-10 was not used by the JKRV.

Lockheed 10A Electra
The seven aircraft sometimes reported with the JKRV were actually operated by the civil airline Aeroput.

PZL P.24
The P.24 was not used by the JKRV.

PZL P.37 Los
During the spring and summer of 1939 Yugoslavia ordered 20 Los Cs, but these were not delivered before the German invasion of Poland.

Rogozarski PSFA
PSFA-Rogozarski (PSFA = First Serbian Aircraft Factory) is actually the formal name of the company, not an aircraft type.

Voisin III/Voisin LA
This type was not used by Serbia.

Voisin IV/Voisin LB
This type was not used by Serbia.

Westland Lysander
A JKRV order for two Mk.IIs not fulfilled.