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Sopwith Triplane


Triplane Fighter / Trainer Aircraft


United Kingdom | 1916



"Such was the immediate success of the British Sopwith Triplane fighter in World War 1 that the Germans brought about their own triple-wing counter - embodied in the Fokker Dr.I Triplane."



Authored By: Staff Writer | Last Edited: 03/19/2021 | Content ©www.MilitaryFactory.com | The following text is exclusive to this site; No A.I. was used in the generation of this content.
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Firepower
Performance
Survivability
Versatility
Impact
The Sopwith Triplane (dubbed "Triplehound" by her pilots) was a three-wing fighter design built by the Sopwith Aviation concern of Britain and based on the strengths of the successful Sopwith "Pup" biplane fighter (detailed elsewhere on this site). The aircraft strayed from conventional aviation design of the time, where biplanes proved the accepted norm for most major air services, and sought to combine additional lift and maneuverability by the addition of a third wing element. This resulted in the first-ever operational deployment of a triplane fighter in the Sopwith Triplane. For a short time in World War 1 (1914-1918), the Triplane had no equal though its eventual end came with the arrival of the Sopwith Camel biplane - the classic fighter aircraft of the war. Triplanes continued to see second-line service as trainers from mid-1917 onward.

First prototypes were developed during the early part of 1916 and a first-flight was recorded on May 28th, 1916. Such was the promise of the aircraft design that it was rushed to the frontlines, seeing formal service introduction as soon as December of 1916. Initial operational use was outstanding enough to warrant serial manufacture and some 147 were ultimately delivered - the primary operator being the Royal Naval Air Service (RNAS).

Beyond its triplane wing arrangement, the aircraft exhibited traditional qualities of fighters of the period - a slab-sided, tapering fuselage with open-air cockpit for one, a fixed, twin-wheeled undercarriage for ground-running, and a single-finned tail unit. To brace the three wing pattern, a thick, large strut joined the planes outboard and shorter struts connected the upper wing assembly to the upper fuselage ahead of the pilot. The pilot sat just behind the wing assemblies which did hinder visibility. However it was in maneuverability and rate-of-climb that the Triplane excelled - giving the pilot a considerable advantage in aerial firefights that were close-ranged.

Armament was typically a single 7.7mm Vickers machine gun firing through the spinning propeller blades by way of a synchronizer. There were some attempts to field a twin-gunned version but it was found that a single gun approach was more effective - the weight gained from the addition of a second machine gun, along with its ammunition supply, degraded overall performance of the fighter.

Power stemmed from a single Clerget 9Z series, 9cylinder rotary piston engine driving a two-bladed wooden propeller at the nose. This allowed for speeds to reach 117 miles per hour as well as a service ceiling up to 20,500 feet. The aircraft held a mission endurance window of 2.75 hours and time to 6,000 feet was nearly six minutes.

Results for the Triplane were exceptional in the early-going - for a period in 1917 the series racked up over 100 enemy kills. However, the machines proved complicated to maintain and repair and steep diving actions often resulted in the wing elements giving way. Its single machine gun also lacked the firepower seen in other twin-gunned contemporaries. These inherent deficiencies ultimately led the Triplane to see a very short operational career over the battlefields of Europe in the war.

Nevertheless, for its time, there proved few equals. Indeed, the Germans respected the Triplane enough to put forth a reward to any German aircraft-maker that could deliver a similar fighter. Anthony Fokker responded with what would become the Fokker Dr.I Triplane (detailed elsewhere on this site). There were many other "multi-winged" creations (some simply aerial monstrosities as aircraft go) seen during this period as well though few ever saw the light of day.

Beyond its service with the British Navy, the Sopwith Triplane found homes in the inventories of France (Navy), Greece (Navy, single example) and the Russian Empire (single example). The French received seventeen examples. The sole Russian Empire example fell to the Soviet Air Force when it was captured.

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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 Sopwith Triplane Triplane Fighter / Trainer Aircraft.
1 x Clerget 9B rotary piston engine developing 130 horsepower and driving a two-bladed propeller at the nose.
Propulsion
117 mph
188 kph | 102 kts
Max Speed
20,505 ft
6,250 m | 4 miles
Service Ceiling
280 miles
450 km | 243 nm
Operational Range
1,200 ft/min
366 m/min
Rate-of-Climb
City-to-City Ranges
Operational range when compared to distances between major cities (in KM).
NYC
 
  LON
LON
 
  PAR
PAR
 
  BER
BER
 
  MOS
MOS
 
  TOK
TOK
 
  SYD
SYD
 
  LAX
LAX
 
  NYC
Structure
The nose-to-tail, wingtip-to-wingtip physical qualities of the Sopwith Triplane Triplane Fighter / Trainer Aircraft.
1
(MANNED)
Crew
18.8 ft
5.74 m
O/A Length
26.5 ft
(8.08 m)
O/A Width
10.5 ft
(3.20 m)
O/A Height
1,100 lb
(499 kg)
Empty Weight
1,541 lb
(699 kg)
MTOW
Design Balance
The three qualities reflected below are altitude, speed, and range. The more full the box, the more balanced the design.
RANGE
ALT
SPEED
Armament
Available supported armament and special-mission equipment featured in the design of the Sopwith Triplane Triplane Fighter / Trainer Aircraft .
STANDARD:
1 OR 2 x 0.303 caliber (7.7mm) Vickers machine gun(s) in fixed, forward-firing position over the nose, synchronized to fire through the spinning propeller blades.
Variants
Notable series variants as part of the Sopwith Triplane family line.
Sopwith Triplane - Base Series Designation
Operators
Global customers who have evaluated and/or operated the Sopwith Triplane. Nations are displayed by flag, each linked to their respective national aircraft listing.

Total Production: 147 Units

Contractor(s): Sopwith Aviation Company - United Kingdom
National flag of France National flag of Greece National flag of Russia National flag of the Soviet Union National flag of the United Kingdom

[ France; Greece; Russia; Soviet Union; United Kingdom ]
Relative Max Speed
Hi: 120mph
Lo: 60mph
Aircraft Max Listed Speed (117mph).

Graph Average of 90 MPH.
Era Crossover
Pie graph section
Pie graph section
Showcasing Aircraft Era Crossover (if any)
Max Alt Visualization
Small airplane graphic
Production Comparison
147
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
Aviation Timeline
EarlyYrs
WWI
Interwar
WWII
ColdWar
Postwar
Modern
Future
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Image of the Sopwith Triplane
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
TRAINING
Recognition
Some designs stand the test of time while others are doomed to never advance beyond the drawing board; let history be their judge.
Similar
Developments of similar form-and-function, or related, to the Sopwith Triplane Triplane Fighter / Trainer Aircraft.
Going Further...
The Sopwith Triplane Triplane Fighter / Trainer Aircraft appears in the following collections:
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