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Avia B.35

Czechoslovakia (1938)
Picture of Avia B.35 Monoplane Fighter Prototype

Three prototypes of the Czech Avia B.35 fighter were all that existed by the time of World War 2.


Detailing the development and operational history of the Avia B.35 Monoplane Fighter Prototype.  Entry last updated on 6/26/2017. Authored by Staff Writer. Content ©www.MilitaryFactory.com

Prior to World War 2 (1939-1945) the nation of Czechoslovakia maintained a strong local military industry that included design, development and production of various small arms, armored vehicles of aircraft. In the years leading up to the grand war, it invested in a low-wing monoplane of modern design by Avia designated as the "B-35". The aircraft was born from a 1935 Ministry of National Defence requirement calling for a single-seat fighter with enclosed cockpit, monoplane wings and metal skin. The product was intended to succeed the aging line of biplanes still in service with the Czech Air Force.

The B.35 first took to the air on September 28th, 1938. The design showcased a slim fuselage with mid-set cockpit, forward-mounted engine and conventional tail unit using a small-area vertical fin and low-mounted horizontal planes. The wing mainplanes were set ahead of midships and given an elliptical shape akin to that as seen in the classic British Supermarine Spitfire. A Hispano-Suiza 12Ydrs 12-cylinder supercharged, liquid-cooled inline engine of 860 horsepower was fitted to the nose section and this drove a two-bladed propeller. The undercarriage, of a typical "tail-dragger" arrangement, was fixed in place and spatted. The wing mainplanes were constructed largely of wood while the fuselage used a mix of metal and canvas with an underlying structure of steel tubing.
In practice, the B-35 seemed a winner for its handling characteristics were deemed good and its performance strong against contemporaries. Maximum speed could reach near 310 miles per hour with ranges out to 310 miles. Rate-of-climb was listed at 2,560 feet per minute.

The program delivered three total prototypes in all and these as the B-35/1, B-35/2 and B-35/3. During testing, the original 12Ydrs engine was superseded by the 12Ycrs series which allowed for a single 20mm cannon to be fitted firing through the propeller hub. The first prototype crashed on November 21st which spurred construction of the slightly revised (smaller ailerons, extended flaps and increased fuselage cross-section) second prototype (B-35/2) - this model took to the air on December 30th, 1938. Following the promising results, the Czech government commissioned for ten preproduction aircraft - though this was derailed with the German occupation of Czechoslovakia during March of 1939.

Despite the occupation, the B-35 product managed to continue development which led to the third prototype (B-35/3), this model earning its wings during a first flight on June 26th, 1939. By this time, the wing mainplanes were modified to feature straight edges along the leading lines (the wings losing their elliptical shape) and a retractable undercarriage was finally fitted. The complete armament suite was now made up of a hub-mounted 20mm autocannon and 2 x 7.92mm wing-mounted machine guns.

In the end, it was these three prototypes that stood for the Avia B-35 aircraft initiative for attention was soon moved to a more evolved form as the "B-135". Bulgarian Air Force pilots were able to trial the B-35/2 prototype back in November of 1939 and later got their hands on the B-35/3 prototype. With the blessings of Berlin, the Bulgarians commissioned for twelve of the type and these served solely with the Bulgarian Air Force during the war.






Our Data Modules allow for quick visual reference when comparing a single entry against contemporary designs. Areas covered include general ratings, speed assessments, and relative ranges based on distances between major cities.

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Relative Maximum Speed Rating
Hi: 400mph
Lo: 200mph
    This entry's maximum listed speed (308mph).

    Graph average of 300 miles-per-hour.
City-to-City Ranges
NYC
 
  LON
LON
 
  PAR
PAR
 
  BER
BER
 
  MOS
MOS
 
  TOK
TOK
 
  SYD
SYD
 
  LAX
LAX
 
  NYC
Graph showcases the Avia B.35/1's operational range (on internal fuel) when compared to distances between major cities.
Aviation Era
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Useful in showcasing the era cross-over of particular aircraft/aerospace designs.
Unit Production Comparison
Comm. Market HI*: 44,000 units
Military Market HI**: 36,183 units
3
3


  * Commercial Market High belongs to Cessna 172.

  ** Military Market High belongs to Ilyushin Il-2.


Altitude Visualization
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National Flag Graphic
Origin: Czechoslovakia
Year: 1938
Type: Monoplane Fighter Prototype
Manufacturer(s): Avia - Czechoslovakia
Production: 3
Global Operators:
Czechoslovakia
Historical Commitments / Honors:

Military lapel ribbon for Operation Allied Force
Military lapel ribbon for the Arab-Israeli War
Military lapel ribbon for the Battle of Britain
Military lapel ribbon for the Battle of Midway
Military lapel ribbon for the Berlin Airlift
Military lapel ribbon for the Chaco War
Military lapel ribbon for the Cold War
Military lapel ribbon for the Cuban Missile Crisis
Military lapel ribbon for the Falklands War
Military lapel ribbon for the French-Indochina War
Military lapel ribbon for the Golden Age of Flight
Military lapel ribbon for the 1991 Gulf War
Military lapel ribbon for the Indo-Pak Wars
Military lapel ribbon for the Iran-Iraq War
Military lapel ribbon for the Korean War
Military lapel ribbon for the 1982 Lebanon War
Military lapel ribbon for the Malayan Emergency
Military lapel ribbon for the attack on Pearl Harbor
Military lapel ribbon for the Six Day War
Military lapel ribbon for the Soviet-Afghan War
Military lapel ribbon for the Spanish Civil War
Military lapel ribbon for the Suez Crisis
Military lapel ribbon for the Vietnam War
Military lapel ribbon for Warsaw Pact of the Cold War-era
Military lapel ribbon for the WASP (WW2)
Military lapel ribbon for the World War 1
Military lapel ribbon for the World War 2
Military lapel ribbon for the Yom Kippur
* Ribbons not necessarily indicative of actual historical campaign ribbons. Ribbons are clickable to their respective campaigns/operations.
Measurements and Weights icon
Structural - Crew, Dimensions, and Weights:
Unless otherwise noted the presented statistics below pertain to the Avia B.35/1 model. Common measurements, and their respective conversions, are shown when possible.

Operational
CREW


Personnel
1


Dimension
LENGTH


Feet
27.89 ft


Meters
8.5 m


Dimension
WIDTH


Feet
35.60 ft


Meters
10.85 m


Dimension
HEIGHT


Feet
8.53 ft


Meters
2.6 m


Weight
EMPTY


Pounds
3,748 lb


Kilograms
1,700 kg


Weight
LOADED


Pounds
4,850 lb


Kilograms
2,200 kg

Engine icon
Installed Power - Standard Day Performance:
1 x Hispano-Suiza 12Ydrs 12-cylinder liquid-cooled engine developing 860 horsepower.

Performance
SPEED


Miles-per-Hour
308 mph


Kilometers-per-Hour
495 kph


Knots
267 kts


Performance
RANGE


Miles
311 mi


Kilometers
500 km


Nautical Miles
270 nm


Performance
CEILING


Feet
27,395 ft


Meters
8,350 m


Miles
5.19 mi


Performance
CLIMB RATE


Feet-per-Minute
2,560 ft/min


Meters-per-Minute
780 m/min

Supported Weapon Systems:

Graphical image of an aircraft medium machine gun
Graphical image of an aircrat automatic cannon
Armament - Hardpoints (0):

1 x 20mm cannon in nose (firing through the propeller hub).
2 x 7.92mm machine guns in wings.
Variants: Series Model Variants
• B.35 - Base Series Designation
• B.35/1 - Initial prototype; elliptical wings; 12Ydrs engine; fixed, spatted undercarriage.
• B.35/2 - Second prototype; 12Ycrs engine; hub-mounted 20mm cannon armament; smaller ailerons; extended flaps; increased fuselage cross-section; fixed undercarriage.
• B.35/3 - Third prototype; Revised wing leading edges; armament of 1 x 20mm cannon and 2 x 7.92mm wing machine guns; retractable undercarriage.
• B.135