View source for Curtiss SO3C Seamew

{{Short description|US navy standard reconnaissance plane}}
{{Use dmy dates|date=August 2019}}
{{Infobox aircraft
| name = SO3C Seamew
| image = File:SO3C with floats.jpg
| caption = 
| type = [[Observation seaplane|Observation floatplane]]
| manufacturer = [[Curtiss-Wright]]
| designer = 
| first_flight = 6 October 1939
| introduction = 1942
| retired = 1945
| status = 
| primary_user = [[United States Navy]]
| more_users = [[Fleet Air Arm]]
| produced = 
| number_built = 795
| unit cost = 
| developed_from = <!-- the aircraft which formed the basis for the topic type -->
| variants = 
}}

The '''Curtiss SO3C Seamew''' was developed by the [[Curtiss-Wright Corporation]] as a replacement for the [[SOC Seagull]] as the [[United States Navy]]'s standard floatplane scout. Curtiss named the SO3C the ''Seamew'' but in 1941 the US Navy began calling it by the name ''Seagull'', the same name as the aircraft it replaced (the Curtiss SOC a biplane type), causing some confusion. The British Royal Navy kept the Curtiss name, ''Seamew'', for the SO3Cs that they ordered. One of the US Navy's main design requirements was that the SOC Seagull's replacement had to be able to operate both from ocean vessels with a single center float and from land bases with the float replaced by a wheeled landing gear.

==Design and development==
[[File:Curtiss XSO3C in wind tunnel 1940.jpeg|thumb|left|The Curtiss XSO3C in a wind tunnel, 1940]]
From the time it entered service the SO3C suffered two serious flaws: inflight stability problems and problems with the unique Ranger air-cooled, inverted V-shaped inline engine. The stability problem was mostly resolved with the introduction of upturned wingtips and a larger rear tail surface that extended over the rear observer's cockpit. The additional tail surface was attached to the rear observer's sliding canopy and pilots claimed there were still stability problems when the canopy was open; the canopy was often open because the aircraft's main role was spotting. While the in-flight stability problem was eventually addressed (although not fully solved), the [[Ranger V-770|Ranger XV-770]] engine proved a dismal failure even after many attempted modifications. Poor flight performance and a poor maintenance record led to the SO3C being withdrawn from US Navy first line units by 1944. The older biplane SOC was taken from stateside training units and restored to first-line service on many US Navy warships until the end of World War II.{{sfn|Donald|1997|p={{page needed|date=January 2023}} }}

==Operational history==
===Royal Navy service===
[[File:Curtiss Seamew Mk1.jpg|thumb|A Royal Navy Seamew Mk I]]

A number of the SO3C-1s, a fixed undercarriage version, were ordered by the [[Royal Navy]] [[Fleet Air Arm]] under the terms of [[Lend-Lease]]. In RN service the SO3C was given the designation "Seamew", a name used again in the 1950s for the [[Short Seamew]]. Crews gave it the name "Sea Cow".

[[Lettice Curtis]], in her book ''Forgotten Pilots'', stated "that although its standard fuel tanks held 300 gallons, it would only just take off with the eighty gallons" fixed as the maximum for [[Air Transport Auxiliary]] trips. In addition the tail needed to be raised before becoming airborne, as "it was possible to take off in an attitude from which it was both impossible to recover and in which there was no aileron control." The final comment from this experienced pilot was "it is hard to imagine how, even in wartime, such an aircraft could have been accepted from the factory, let alone given valuable cargo space across the Atlantic."{{sfn|Curtis|1971|p=227}}

The first batch for the RN was to have a centreline bomb rack and arrestor gear. Later versions, known as the '''Seamew Mk.I''', were the SO3-2C variant. 250 Seamews were allocated and some 100 actually delivered,{{sfn|Mondey|1996|p=95}} the last batch was refused in favour of additional [[OS2U Kingfisher|Vought Kingfishers]]. Deliveries to the RN started in January 1944. It was declared obsolete in September the same year and completely removed from service in 1945.

The SO3C-1K was to have been taken into service as the '''Queen Seamew''', but an order of 30 was canceled.

Seamews served with [[744 Naval Air Squadron|No. 744 NAS]] and [[745 Naval Air Squadron|No. 745 NAS]] at RCAF Yarmouth, [[Nova Scotia]], Canada, and with [[755 Naval Air Squadron|No. 755 NAS]] based in [[Hampshire]], UK.

==Variants==
;XSO3C-1
:Prototype, one built originally as a landplane and later modified as a floatplane.
;SO3C-1
:Production variant, 141 built.
;SO3C-1K
:SO3C-1 aircraft modified as target drones, some to the Royal Navy as the '''Queen Seamew I'''.
;SO3C-2
:Similar to SO3C-1 but with arrester gear, landplane variant could be fitted with a ventral bomb rack, 200 built.
;SO3C-2C
:Lend-lease variant of the SO3C-2 with improved radio and 24V electrical system, for the [[Royal Navy]] as the '''Seamew I''', 259 ordered but only about 59 were built.
;SO3C-3
:Reduced weight variant with detailed improvements and catapult operation ability removed, 39 built with a further 659 cancelled.
;SO3C-4
:Proposed variant of the SO3C-3 with arrester hook and catapult capable, not built.
;SO3C-4B
:Lend-lease variant of the SO3C-4 for the Royal Navy as the '''Seamew II''', not built.

==Operators==
[[File:Curtiss SO3C catapulted USS Biloxi 1943.jpg|thumb|An SO3C is catapulted from the [[USS Biloxi (CL-80)|USS ''Biloxi'']], October 1943.]]
[[File:Curtiss SO3C Seagull drawings.PNG|thumb|300px|Line drawings for the SO3C.]]
; {{flag|United Kingdom}}
* [[Royal Navy]], [[Fleet Air Arm]]{{sfn|Thetford|1991|p=91}}
** [[744 Naval Air Squadron]]
** [[745 Naval Air Squadron]]
** [[755 Naval Air Squadron]]
; {{flag|United States}}
* [[United States Navy]]

==Specifications (SO3C-2)==
{{Aircraft specs
|ref=American Warplanes of World War II{{sfn|Donald|1995|p=85}}
|prime units?=imp
<!--
        General characteristics
-->
|crew=2
|capacity=
|length ft=36
|length in=10
|length note=seaplane; {{cvt|34|ft|2|in}} landplane
|span ft=38
|span in=0
|span note=
|height ft=15
|height in=0
|height note=
|wing area sqft=290
|wing area note=
|aspect ratio=<!-- sailplanes -->
|airfoil=
|empty weight lb=4284
|empty weight note=
|gross weight lb=
|gross weight note=
|max takeoff weight lb=5729
|max takeoff weight note=
|fuel capacity=
|more general=
<!--
        Powerplant
-->
|eng1 number=1
|eng1 name=[[Ranger V-770-6]]
|eng1 type=inverted V-12 air-cooled piston engine
|eng1 hp=600

|prop blade number=2
|prop name=constant-speed propeller
|prop dia ft=<!-- propeller aircraft -->
|prop dia in=<!-- propeller aircraft -->
|prop dia note=
<!--
        Performance
-->
|max speed mph=172
|max speed note=
|cruise speed mph=123
|cruise speed note=
|stall speed mph=
|stall speed note=
|never exceed speed mph=
|never exceed speed note=
|range miles=1150
|range note=
|combat range miles=
|combat range note=
|ferry range miles=
|ferry range note=
|endurance=8 hours{{sfn|Thetford|1991|p=85}}
|ceiling ft=15800
|ceiling note=
|g limits=<!-- aerobatic -->
|roll rate=<!-- aerobatic -->
|climb rate ftmin=
|climb rate note=
|time to altitude=
|wing loading lb/sqft=19.8
|wing loading note=
|fuel consumption lb/mi=
|power/mass= {{cvt|0.10|hp/lb}}

|more performance=
<!--
        Armament
-->
|armament=
* 1× 0.30 in (7.62 mm) forward firing [[M1919 Browning machine gun]] and 1× 0.50 in (12.7 mm) [[M2 Browning machine gun]] in rear cockpit
* 2× 100 lb (45 kg) bombs or 325 lb (147 kg) [[depth charges]] underwing
|avionics=
}}

==See also==
{{Aircontent
|related=
|similar aircraft=
* [[Arado Ar 196]]
* [[Curtiss SOC Seagull]]
* [[Mitsubishi F1M]]
* [[Supermarine Walrus]]
* [[Vought OS2U Kingfisher]]
|lists=
* [[List of aircraft of World War II]]
* [[List of aircraft of the Fleet Air Arm]]
* [[List of United States Navy aircraft designations (pre-1962)]]
|see also=
}}

==References==
;Notes
{{reflist|30em}}
;Bibliography
{{refbegin}}
* [[Peter M. Bowers|Bowers, Peter M.]] ''Curtis Aircraft, 1907–1947''. London: Putnam & Company Ltd., 1979. {{ISBN|0-370-10029-8}}.
* {{cite book |last1=Curtis |first1=Lettice |title=The forgotten pilots : a story of the Air Transport Auxiliary, 1939-45 |date=1971 |publisher=Nelson & Saunders |location=Olney, Buckinghamshire |isbn=0-947750-02-9}}
* {{cite book |last1=Donald |first1=David  |title=The complete encyclopedia of world aircraft |date=1997 |publisher=Orbis Publishing Ltd |isbn=0-7607-0592-5}}
* {{cite book |last1=Donald |first1=David |title=American warplanes of World War II |date=1995 |publisher=Aerospace Pub. |location=London |isbn=1-874023-72-7}}
* Ginter, Steve. ''The Reluctant Dragon – The Curtiss SO3C Seagull/Seamew (Naval Fighters No.47)''. Simi Valley, CA: Ginter Books, 1999. {{ISBN|0-942612-47-7}}.
* Green, William. ''War Planes of the Second World War, Volume Six: Floatplanes''. London: Macdonald & Co. (Publishers) Ltd., 1962.
* Larkins, William T. ''Battleship and Cruiser Aircraft of the United States Navy''. Atglen, PA: Schiffer Books, Inc., 1996. {{ISBN|0-7643-0088-1}}. OCLC [http://worldcat.org/oclc/35720248 35720248].
* {{cite book |last1=Mondey |first1=David |title=The Hamlyn Concise Guide to American Aircraft of World War II |date=1996 |publisher=Chancellor Press |location=London |isbn=1-85152-706-0}}
* Swanborough, Gordon and Peter M. Bowers. ''United States Navy Aircraft since 1911''. London: Putnam & Company Ltd., Second edition, 1976. {{ISBN|0-370-10054-9}}.
* {{cite book |last1=Thetford |first1=Owen |title=British naval aircraft since 1912 |date=1991 |location=London |publisher=Putnam & Company |isbn=0-85177-849-6}}
{{refend}}

==External links==
{{Commons category}}
* [https://books.google.com/books?id=vSYDAAAAMBAJ&pg=PA60  SLING SHOT PLANES] May 1943 Popular Science article

{{Curtiss aircraft}}
{{USN scout aircraft}}

{{DEFAULTSORT:Curtiss So3c Seamew}}
[[Category:Curtiss aircraft|SO3C]]
[[Category:Floatplanes]]
[[Category:Single-engined tractor aircraft]]
[[Category:Mid-wing aircraft]]
[[Category:Aircraft first flown in 1939]]
[[Category:1940s United States military reconnaissance aircraft]]
[[Category:Aircraft with fixed conventional landing gear]]