×
Aircraft / Aviation Vehicles & Artillery Infantry Arms Warships & Submarines Military Pay Scale Military Ranks
HOME
AIRCRAFT / AVIATION
MODERN AIR FORCES
COUNTRIES
MANUFACTURERS
COMPARE
BY CONFLICT
BY TYPE
BY DECADE
COLD WAR
FRENCH-INDOCHINA WAR
WORLD WAR 2

Supermarine Sea Otter


Amphibious Maritime Patrol Floatplane Aircraft (1942)


Aviation / Aerospace

1 / 1
Image from the Public Domain.

Jump-to: Specifications

Nearly 300 Sea Otter amphibians were completed by the storied Supermarine concern - these seeing service in World War 2 and beyond.



Authored By: Staff Writer | Last Edited: 10/23/2017 | Content ©www.MilitaryFactory.com | The following text is exclusive to this site.
Best known for its famous, war-winning World War 2-era fighter, the "Spitfire", Supermarine of the United Kingdom was also a major player in the floatplane / flying boat industry. One of its contributions of the pre-war period became the "Sea Otter" (originally known as the "Sting Ray") which was produced in 292 examples as a biplane-winged "amphibian". This categorization meant that the aircraft was equally-capable of landing and taking off from either traditional runways or from water due to its multi-functional design.

The Sea Otter was developed by the company as a longer-ranged, maritime patrol version of its popular "Walrus" product of 1935 of which 740 were ultimately produced from 1936 until 1944. This aircraft, too, was an amphibian with a biplane wing arrangement and held its engine between the two planes, over the fuselage. The Sea Otter followed suit but installed its sole engine unit within the upper wing mainplane. Unlike the Walrus, which had its propelled driven in a "pusher" arrangement, the Sea Otter reverted to a more traditionally-arranged propeller mounting with the multi-bladed unit held at the front of the engine installation ("puller" arrangement).

It its earliest form, the Sea Otter was outfitted with a Bristol Perseus XI series air-cooled radial piston engine and this was used to drive a two-bladed propeller unit. When this was found to be too weak, a three-bladed propelled was substituted and a first-flight was recorded on September 23rd, 1938. Overheating issues led to a complete powerplant switch, this arriving in the form of the Bristol Mercury XXX series.

With the war in full swing, maritime patrollers like the Sea Otter were soon in high demand as seaways were contested across the globe. The British Air Ministry finally committed to the type through a January 1942 order and the series went on to see considerable wartime service under the banners of both the Royal Air Force (RAF) and Royal Navy (RN). The latter proved the more prolific operator with no fewer than twenty-one squadrons operating the Sea Otter. The RAF utilized the line across nine squadrons as well as one experimental Marine unit.
As designed, the Sea Otter was crewed by four personnel and was given a length of 39.10 feet with a wingspan of 46 feet and a height of 15 feet. Empty weight was 6,800lb against an MTOW of 10,000lb and power from the Mercury XXX radial engine was 965 horsepower. Maximum speed reached 165 miles per hour with a range out to nearly 700 miles, a service ceiling up to 17,000 feet and a rate-of-climb nearing 870 feet-per-minute.

The Sea Otter was modestly armed through 1 x 7.7mm Vickers K machine gun fitted to the nose and 2 x 7.7mm Vickers K machine guns installed in the aft section of the aircraft. Its bombload measured 4 x 250lb drop bombs.

Outwardly, the aircraft was certainly a product of its time. The fuselage was traditionally-arranged with the cockpit seated aft of a nosecone assembly. The front and sides of the cockpit were lined with windows for better viewing by the crew. The biplane wing arrangement consisted of a lower unit fitted to the roof of the fuselage and an upper unit suspended high over the fuselage. The wings were joined by parallel strutworks and cabling. The upper wing unit held the single engine nacelle with the propeller just cleared the fuselage roof. Under each lower wing element were outboard pontoons for water-running / stability. For ground-based running, the aircraft incorporated a conventional "tail-dragge"r stance made up of two main legs emanating from the fuselage sides and a diminutive tailwheel seated under the tail structure. The tail section had a single vertical plane with a pair of mid-mounted horizontal planes.

Two production variants ultimately emerged, the first becoming "Sea Otter Mk I" and this model was used primarily in the reconnaissance and communications role. The follow-up "Sea Otter Mk II" was a dedicated Search and Rescue (SAR) platform. Some 592 units were ordered by the Air Ministry but, in the end, just 292 of the order were realized mainly due to the conclusion of the war in 1945. Global operators went on to include British allies Australia, Denmark, Egypt, France and the Netherlands.

Sea Otters found extended post-war service in both military and civilian markets. In the latter, various facilities were added, including a lavatory and baggage compartment, to better serve passengers.

No preserved Sea Otters exist today.

Specifications



Service Year
1942

Origin
United Kingdom national flag graphic
United Kingdom

Status
RETIRED
Not in Service.
Crew
1

Production
292
UNITS


Supermarine - UK
National flag of Australia National flag of Denmark National flag of Egypt National flag of France National flag of the Netherlands National flag of the United Kingdom Australia; Denmark; Egypt; France; Netherlands; United Kingdom
(OPERATORS list includes past, present, and future operators when applicable)
Special-Mission: Search & Rescue (SAR)
Ability to locate and extract personnel from areas of potential harm or peril (i.e. downed airmen in the sea).
Maritime / Navy
Land-based or shipborne capability for operating over-water in various maritime-related roles while supported by allied naval surface elements.
Commercial Aviation
Used in roles serving the commercial aviation market, ferrying both passengers and goods over range.
Intelligence-Surveillance-Reconnaissance (ISR), Scout
Surveil ground targets / target areas to assess environmental threat levels, enemy strength, or enemy movement.


Length
39.9 ft
(12.15 m)
Width/Span
45.9 ft
(14.00 m)
Height
15.1 ft
(4.60 m)
Empty Wgt
6,834 lb
(3,100 kg)
MTOW
10,020 lb
(4,545 kg)
Wgt Diff
+3,186 lb
(+1,445 kg)
(Showcased structural values pertain to the base Supermarine Sea Otter production variant)
Installed: 1 x Bristol Mercury XXX air-cooled radial piston engine developing 965 horsepower and driving a three-bladed propeller unit in puller configuration.
Max Speed
165 mph
(265 kph | 143 kts)
Ceiling
16,995 ft
(5,180 m | 3 mi)
Range
690 mi
(1,110 km | 2,056 nm)
Rate-of-Climb
870 ft/min
(265 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 base Supermarine Sea Otter production variant. Compare this aircraft entry against any other in our database. View aircraft by powerplant type)
STANDARD:
1 x 7.7mm Vickers K machine gun in nose
2 x 7.7mm Vickers K machine guns in aft position.

OPTIONAL:
4 x 250lb conventional drop bombs.


Supported Types


Graphical image of an aircraft medium machine gun
Graphical image of an aircraft conventional drop bomb munition


(Not all ordnance types may be represented in the showcase above)
Hardpoint Mountings: 4


Sea Otter - Base Series Name
Sea Otter Mk.I - Reconnaissance / communications platform (amphibious capabilities).
Sea Otter Mk.II - Search and Rescue (SAR) amphibious aircraft.


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 pioneering aircraft
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 representing modern aircraft
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 War
Military lapel ribbon for experimental x-plane aircraft


Ribbon graphics not necessarily indicative of actual historical campaign ribbons. Ribbons are clickable to their respective aerial campaigns / operations / aviation periods.

Advertisements





Disclaimer | Privacy Policy | Cookies


2022 Military Pay Scale Army Ranks Navy Ranks Air Force Ranks Alphabet Code DoD Dictionary American War Deaths French Military Victories Vietnam War Casualties

The "Military Factory" name and MilitaryFactory.com logo are registered ® U.S. trademarks protected by all applicable domestic and international intellectual property laws. All written content, illustrations, and photography are unique to this website (unless where indicated) and not for reuse/reproduction in any form. Material presented throughout this website is for historical and entertainment value only and should not to be construed as usable for hardware restoration, maintenance, or general operation. We do not sell any of the items showcased on this site. Please direct all other inquiries to militaryfactory AT gmail.com.

Part of a network of sites that includes GlobalFirepower, a data-driven property used in ranking the top military powers of the world, WDMMA.org, the World Directory of Modern Military Aircraft, and SR71blackbird.org, detailing the history of the world's most iconic spyplane.


Facebook Logo YouTube Logo

www.MilitaryFactory.com • All Rights Reserved • Content ©2003-