Aircraft / Aviation Vehicles & Artillery Infantry Arms Warships & Submarines Military Ranks Military Pay Chart (2024)

Aviation / Aerospace

Shin Meiwa US-1 / PS-1

Maritime Search and Rescue / Anti-Submarine Warfare (ASW) Flying Boat Aircraft [ 1971 ]

The Shin Meiwa maritime patrol flying boat was developed to a JMSDF requirement during the late-1960s.

Authored By: Staff Writer | Last Edited: 11/21/2016 | Content ©www.MilitaryFactory.com | The following text is exclusive to this site.

During World War 2 (1939-1945) the Japanese concern of Kawanishi excelled at development and production of large flying boat aircraft for various over-water roles - Search and Rescue (SAR), Anti-Submarine Warfare (ASW), general transport, reconnaissance and the like. However, the post-war era held no place for the company so it was restructured and reborn as "Shin Meiwa Industries". This allowed continuation of large aircraft production services into the post-war period and the company eventually evolved to become "ShinMaywa" of today.

While it still carried the Shin Meiwa name, engineers took to modifying an existing American-originated Grumman HU-16 "Albatross" flying boat (detailed elsewhere on this site) into a more modern product. This produced the "UF-XS" prototype. The twin-engine design of the original gave way to a four engine arrangement in which 2 x Pratt & Whitney R-1340 radials assisted the existing Wright R-1820 radials. The engines were all fitted at the high-mounted wing mainplanes with their wash set to go over and under the wing element and improve lift properties. The fuselage retained a boat-like hull and the flight deck sat over the short nose section. The tail unit exhibited a "T-style" wing arrangement to clear prop-wash and other forces at play. Pontoons were set under the wing mainplanes to allow for take-off and landing from water sources.

The result was an aircraft with improved on- and over-water capabilities - greater inherent power, increased operational ranges and Short Take-Off and Landing (STOL) performance. With authorization from authorities of the Japan Maritime Self-Defense Force (JMSDF), the design was pushed into testing under the "PS-X" designation in 1967 and a first-flight was recorded on October 5th of that year. The intended maritime role for the aircraft would be Anti-Submarine Warfare and general patrol. Two prototypes were contracted for.

Having cleared the requisite evaluations, the PS-X advanced as the "PS-1" when it was adopted for service in 1969. It was formally introduced in 1971 and twenty-three of the PS-1 form were acquired in all. In service, they carried torpedo, depth charges, rocket armament and sonobuoys primarily intended for use against enemy submarines and the crew numbered ten made up of airmen and position specialists. A dipping sonar gave a useful submarine-hunting quality but required the aircraft to be landed on the water's surface to operate. Power was from 4 x Ishikawajima T64-IHI-10 (GE T64) turboprop engines.

As it stood, the PS-1 was a functional aircraft but it lacked true amphibious capabilities as a flying boat - it was restricted to on-water operations in terms of landing and taking off and carried its own beaching equipment as a result. Thought then turned to a dedicated Search and Rescue (SAR) form which did away with the PS-1's military equipment fit and brought about implementation of a wheeled, retractable undercarriage for on-land take-off and landings as well as the requisite SAR equipment. This resulted in the "US-1", a true amphibious flying boat aircraft - of which six were constructed. A prototype was flown for the first time on October 15th, 1974. From the US-1 mark was also formed the "US-1A" standard which incorporated uprated engines for improved STOL performance. Fourteen were developed to this standard and introduced for service while powered by 4 x Ishikawajima T64-IHI-10J (GE T64) turboprop engines.

The PS-1 was removed from active service in 1989.

The series has since been succeeded by the ShinMaywa US-2 flying boat introduced in 2007 (detailed elsewhere on this site). This mark began as the US-1A "Kai" developed during the 1990s and was given Rolls-Royce AE 2100J engines with six-bladed propeller units. It was forced upon the JMSDF when funding for an all-new design could not be had. As such, it was taken on as the US-2.

The PS-1 / US-1/-1A family maintains a limited, active presence in the JMSDF inventory but its best flying days are clearly behind it - two US-1 are retained for the SAR role under the "special mission" categorization.©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.


Service Year

Japan national flag graphic



Shin Meiwa Industries (ShinMaywa) - Japan
(View other Aviaton-Related Manufacturers)
National flag of modern Japan Japan
(OPERATORS list includes past, present, and future operators when applicable)
Special-Mission: Anti-Submarine Warfare (ASW)
Equipped to search, track, and engage enemy underwater elements by way of specialized onboard equipment and weapons.
Special-Mission: Anti-Ship
Equipped to search, track, and engage enemy surface elements through visual acquisition, radar support, and onboard weaponry.
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.
Intelligence-Surveillance-Reconnaissance (ISR), Scout
Surveil ground targets / target areas to assess environmental threat levels, enemy strength, or enemy movement.

109.8 ft
(33.46 m)
108.8 ft
(33.15 m)
32.6 ft
(9.95 m)
Empty Wgt
51,368 lb
(23,300 kg)
99,208 lb
(45,000 kg)
Wgt Diff
+47,840 lb
(+21,700 kg)
(Showcased structural values pertain to the Shin Meiwa US-1 production variant)
Installed: 4 x Ishikawajima-Harima (General Electric) T64-IHI-10J turboprop engines developing 3,495 horsepower each.
Max Speed
317 mph
(510 kph | 275 kts)
23,622 ft
(7,200 m | 4 mi)
2,374 mi
(3,820 km | 7,075 nm)
1,600 ft/min
(488 m/min)

♦ MACH Regime (Sonic)
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 Shin Meiwa US-1 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)
Up to 1,500lb of ordnance including torpedoes, rocket pods (PS-1), and depth charges. ASW mission equipment included sonobuoys and dipping sonar gear.

Supported Types

Graphical image of aircraft aerial rockets
Graphical image of an aircraft rocket pod
Graphical image of an aircraft aerial torpedo
Graphical image of a naval depth charge

(Not all ordnance types may be represented in the showcase above)
Hardpoint Mountings: 2

PS-X - Prototype designation; 2 examples
PS-1 - Initial production mark; 23 examples produced.
US-1 - Second production mark; 6 examples produced.
US-1A - Third production mark; 14 examples produced.

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 Ukranian-Russian War
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.

Disclaimer | Privacy Policy | Cookies

2024 Military Pay Chart Military Ranks DoD Dictionary Conversion Calculators Military Alphabet Code Military Map Symbols

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. No A.I. was used in the generation of this content; site is 100% curated by humans.

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 (World Directory of Modern Military Aircraft), WDMMW.org (World Directory of Modern Military Warships), SR71blackbird.org, detailing the history of the world's most iconic spyplane, and MilitaryRibbons.info, cataloguing military medals and ribbons. Special Interest: RailRoad Junction, the locomotive encyclopedia.

©2023 www.MilitaryFactory.com • All Rights Reserved • Content ©2003-2023 (20yrs)