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Aviation / Aerospace

Hannover CL.III


Twin-Seat Biplane Fighter Aircraft [ 1917 ]



The Hannover CL.III was a direct evolution of the earlier CL.II and saw production figures exceed 600 units in all.



Authored By: Staff Writer | Last Edited: 07/31/2019 | Content ©www.MilitaryFactory.com | The following text is exclusive to this site.

GO TO SPECIFICATIONS [+]
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Even as the CL.II (detailed elsewhere on this site) by Hannoversche Waggonfabrik AG was making its way to German squadrons during World War 1 (1914-1918), the company was already evolving the design under the designation of "CL.III". The engine-of-choice switched from the original's Argus As.III of 180 horsepower to the proven Mercedes D.III water-cooled engine of 160 horsepower - the change promising greater performance power at altitude. Several measures were also enacted to reduce the type's operating weight and various sections were reinforced or revised. The resulting biplane fighter saw total production reach 617 units with the German Empire and some post-war use was had by the nations of Latvia and the newly-founded Soviet Union.

The aircraft carried over other established qualities of the CL.II that came before it: the unequal-span biplane wing members (single bay, parallel struts), tail-dragger undercarriage, and tandem seating for its crew of two (pilot in front, gunner/observer at the rear). Armament was increased from two 7.92mm machine guns (one forward, one aft) to three machine guns: 2 x 7.92mm machine guns now featured at the rear cockpit emplacement.

Dimensions included a running length of 24.9 feet, a wingspan of 38.4 feet, and a height of 9 feet. Empty weight reached 1,580 lb against an MTOW of 2,400 lb.

The CL.III was approved on February 23rd, 1918 and a serial production order for 200 units then followed by the German Air Service with first-deliveries tagged for March of that year. However, there proved a shortage of the in-demand Mercedes D.III engines which resulted in just eighty of the aircraft featuring entering service with this powerplant - the remainder were equipped with the original Argus As.III of 180 horsepower and these became the "CL.IIIa" in service. The engines were license-built by Opel and designated "As.III(O)" to mark the origin.

With this engine in place, the aircraft could manage a maximum speed of 103 miles-per-hour, reach an altitude of 24,600 feet, and climb at 620 feet-per-minute while holding a mission endurance of three hours.

The CL.IIIa proved itself the definitive production mark of the series, seeing combat service from entry in April 1918 up until the end of the war in November of 1918 (the 'Armistice') - though by this point the capable fighters were being used in the ground-attack role to help delay Allied advances. At least one other designation emerged as the "CL.IIIb" and this was to feature the NAG C.III engine of 185 horsepower. For this work, a single experimental model, the "CL.IIIc", was to serve as a testbed while also sporting a two-bay biplane wing arrangement.

Despite the signing of the Armistice of 1918 to end the war in full, Hannover continued serial production of the aircraft for a short time later, adding another 100 CL.III and another 38 CL.IIIa forms.©MilitaryFactory.com
Note: The above text is EXCLUSIVE to the site www.MilitaryFactory.com. It is the product of many hours of research and work made possible with the help of contributors, veterans, insiders, and topic specialists. If you happen upon this text anywhere else on the internet or in print, please let us know at MilitaryFactory AT gmail DOT com so that we may take appropriate action against the offender / offending site and continue to protect this original work.
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Specifications



Service Year
1917

Origin
Imperial Germany national flag graphic
Imperial Germany

Status
RETIRED
Not in Service.
Crew
2

Production
617
UNITS


Hannoversche Waggonfabrik / Opel - German Empire
(View other Aviaton-Related Manufacturers)
National flag of the German Empire National flag of the Soviet Union German Empire; Latvia (post-war); Soviet Union (post-war)
(OPERATORS list includes past, present, and future operators when applicable)
Air-to-Air Combat, Fighter
General ability to actively engage other aircraft of similar form and function, typically through guns, missiles, and/or aerial rockets.
Close-Air Support (CAS)
Developed to operate in close proximity to active ground elements by way of a broad array of air-to-ground ordnance and munitions options.
Intelligence-Surveillance-Reconnaissance (ISR), Scout
Surveil ground targets / target areas to assess environmental threat levels, enemy strength, or enemy movement.


Length
24.9 ft
(7.58 m)
Width/Span
38.4 ft
(11.70 m)
Height
9.2 ft
(2.80 m)
Empty Wgt
1,576 lb
(715 kg)
MTOW
2,381 lb
(1,080 kg)
Wgt Diff
+805 lb
(+365 kg)
(Showcased structural values pertain to the Hannover CL.IIIa production variant)
Installed: 1 x Argus As.III 6-cylinder water-cooled inline piston engine developing 180 horsepower and driving a two-bladed wooden propeller at the nose.
Max Speed
103 mph
(165 kph | 89 kts)
Ceiling
24,606 ft
(7,500 m | 5 mi)
Range
311 mi
(500 km | 926 nm)
Rate-of-Climb
620 ft/min
(189 m/min)


♦ 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


(Showcased performance specifications pertain to the Hannover CL.IIIa production variant. Performance specifications showcased above are subject to environmental factors as well as aircraft configuration. Estimates are made when Real Data not available. Compare this aircraft entry against any other in our database or View aircraft by powerplant type)
1 x 7.92mm Spandau LMG 08/15 machine gun in fixed, forward-facing mounting.
2 x 7.92mm Parabellum MG14 machine guns in trainable mounting at rear cockpit.


Supported Types


Graphical image of an aircraft medium machine gun


(Not all ordnance types may be represented in the showcase above)
Hardpoint Mountings: 0


CL.III - Base Series Designation; powered by Mercedes D.III engine; 80 examples completed.
CL.IIIa - Powered by Argus A.III inline piston engine of 180 horsepower; production by Opel.
CL.IIIb - Proposed production form to be powered by NAG C.III engine of 185 horsepower.
CL.IIIC - Testbed form with revised wing mainplanes with twin bays and NAG engine.


General Assessment
Firepower  
Performance  
Survivability  
Versatility  
Impact  
Values are derrived from a variety of categories related to the design, overall function, and historical influence of this aircraft in aviation history.
Overall Rating
The overall rating takes into account over 60 individual factors related to this aircraft entry.
74
Rating is out of a possible 100 points.
Relative Maximum Speed
Hi: 120mph
Lo: 60mph
This entry's maximum listed speed (103mph).

Graph average of 90 miles-per-hour.
City-to-City Ranges
NYC
 
  LON
LON
 
  PAR
PAR
 
  BER
BER
 
  MOS
MOS
 
  TOK
TOK
 
  SYD
SYD
 
  LAX
LAX
 
  NYC
Hannover CL.IIIa operational range when compared to distances between major cities (in KM).
Max Altitude Visualization
Small airplane graphic
Design Balance
The three qualities reflected above are altitude, speed, and range.
Aviation Era Span
Pie graph section
Pie graph section
Showcasing era cross-over of this aircraft design.
Unit Production (617)
617
36183
44000
Compared against Ilyushin IL-2 (military) and Cessna 172 (civilian).
>>

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Image of the Hannover CL.III
Image from the Public Domain.


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