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Knoller 70


Biplane Fighter Prototype


Austria-Hungary | 1918



"The Knoller Model 70 biplane fighter managed just two prototypes before the Austro-Hungarian surrender of November 1918."



Authored By: Staff Writer | Last Edited: 11/30/2016 | Content ©www.MilitaryFactory.com | The following text is exclusive to this site; No A.I. was used in the generation of this content.
The Austro-Hungarian Empire managed its own aero-industry apart from that of Germany's during World War 1 (1914-1918) and several homegrown designs emerged during the fighting. One of these offerings arrived from the work completed by Professor Richard Knoller - this becoming the Knoller "70". The single-seat, single-engine biplane debuted during 1917 and was tested into 1918. This led to an order for ten pre-series aircraft for additional evaluation but the Austro-Hungarian surrender ended any future the biplane fighter would have had.

The Knoller 70.01 was the first of two prototypes completed. Physical work began in 1917 by K.u.k. Fliegerarsenal Fischamend. The aircraft's general arrangement was traditional for the period as it sat its pilot in an open-air cockpit aft of the engine installation at the nose and under / behind the upper wing assembly. The wings were of a biplane arrangement, unstaggered and featuring single bays - one of the more interesting design elements of these members was an inherent ability to "flex" on-the-fly as the aircraft gained speed, thus reducing drag. Struts and cabling braced the members to the fuselage both under and above the aircraft. The fuselage was aerodynamically refined with a large spinner added to the nose and the empennage tapering smoothly. The tail itself was made up of a single vertical fin with mid-set horizontal planes. The undercarriage was of a tail-dragger arrangement, wheeled and fixed in place.

Dimensions of the aircraft included a wingspan of 26.2 feet, a length of 20.9 feet and a height of 9.4 feet.

Power was derived from a single Hiero 6-cylinder, water-cooled engine outputting 230 horsepower and driving a two-bladed propeller at the nose. As tested, the 70.01 was estimated to hold a maximum speed of 149 miles per hour.

Proposed armament was made up of 2 x 8mm Schwarzlose machine guns, these set over the nose and synchronized to fire through the spinning propeller blades.

Prototype 70.01, achieved a first-flight on November 23rd, 1917. However, a few days into its test phase it was damaged while on the ground. During the repair period, ailerons were installed at the upper wing members for improved controlling but more damage was suffered during a landing action in the spring of 1918. Prototype 70.02 was made available during September of 1918 but the end of the war in November of 1918 meant the end of the Knoller fighter project.

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Power & Performance
Those special qualities that separate one aircraft design from another. Performance specifications presented assume optimal operating conditions for the Knoller 70.01 Biplane Fighter Prototype.
1 x Hiero 6-cylinder water-cooled engine developing 230 horsepower and driving a two-bladed propeller unit at the nose.
Propulsion
149 mph
240 kph | 130 kts
Max Speed
Structure
The nose-to-tail, wingtip-to-wingtip physical qualities of the Knoller 70.01 Biplane Fighter Prototype.
1
(MANNED)
Crew
20.8 ft
6.35 m
O/A Length
26.2 ft
(8.00 m)
O/A Width
9.4 ft
(2.85 m)
O/A Height
Armament
Available supported armament and special-mission equipment featured in the design of the Knoller 70 Biplane Fighter Prototype .
PROPOSED:
2 x 8mm Schwarzlose machine guns mounted over the nose and synchronized to fire through the spinning propeller blades.
Variants
Notable series variants as part of the Knoller 70 family line.
Model 70 - Base Series Name; two prototypes completed.
70.01 - First prototype
70.02 - Second prototype
Operators
Global customers who have evaluated and/or operated the Knoller 70. Nations are displayed by flag, each linked to their respective national aircraft listing.

Total Production: 2 Units

Contractor(s): Knoller - Austria-Hungary
National flag of Austria National flag of the Austro-Hungarian Empire National flag of Hungary

[ Austria-Hungary ]
Relative Max Speed
Hi: 150mph
Lo: 75mph
Aircraft Max Listed Speed (149mph).

Graph Average of 113 MPH.
Era Crossover
Pie graph section
Showcasing Aircraft Era Crossover (if any)
Production Comparison
2
36183
44000
Entry compared against Ilyushin IL-2 (military) and Cessna 172 (civilian) total production.
MACH Regime (Sonic)
Sub
Trans
Super
Hyper
HiHyper
ReEntry
RANGES (MPH) Subsonic: <614mph | Transonic: 614-921 | Supersonic: 921-3836 | Hypersonic: 3836-7673 | Hi-Hypersonic: 7673-19180 | Reentry: >19030
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Image of the Knoller 70
Image from the Public Domain.

Mission Roles
Some designs are single-minded in their approach while others offer a more versatile solution to airborne requirements.
AIR-TO-AIR COMBAT
X-PLANE
Recognition
Some designs stand the test of time while others are doomed to never advance beyond the drawing board; let history be their judge.
Going Further...
The Knoller 70 Biplane Fighter Prototype appears in the following collections:
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