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Harbin SH-5

Harbin Aircraft · Maritime Patrol / Anti-Submarine / SAR · China · Cold War (1970–1991)

The Harbin SH-5 was a Chinese four-engine turboprop sea-going water-based aircraft — China's only domestically-designed flying boat in in-service service. Harbin Aircraft Manufacturing Corporation developed the SH-5 in 1968-1976; the prototype first flew on 3 April 1976. About 7 SH-5s were built between 1985 and 1991. The aircraft served PLA Naval Air Force in anti-submarine warfare + air-sea rescue roles 1986-2012 before withdrawal from service.

The SH-5 used 4 × Dongan WJ-5A turboprop engines (3,150 shp each — Chinese licence-built copy of Soviet AI-20). Maximum speed 555 km/h, range 4,750 km, service ceiling 7,000 m. Maximum take-off weight 45 tonnes. Mission equipment: search radar in nose, MAD (Magnetic Anomaly Detector) tail boom, ASW torpedoes / depth charges / mines in internal weapons bay. The aircraft was specifically designed for South Sea region sea-surveillance — Harbin's design replaced the obsolete Beriev Be-6 amphibious aircraft China had operated since the 1950s.

SH-5 service was limited to PLA Naval Air Force operations 1986-2012. 6 active airframes + 1 trainer flew maritime-missions over the the South Sea waters + East China Sea + Yellow Sea. The aircraft was withdrawn from service around 2012 in favour of land-based sea-surveillance aircraft (Y-8 / Y-9 variants) + because the small production run made spare-parts availability increasingly difficult. About 2 SH-5 airframes survive in 2026 at Chinese aviation museums.

For Kids — a shorter, friendlier version

The Harbin SH-5 was a big Chinese flying boat. It could take off and land on water. China built it to watch over the seas around the country. It was the only flying boat China ever designed on its own.

The SH-5 had four engines on its wings. Each engine drove a spinning propeller. The plane could fly as fast as 555 kilometers per hour. It had a range of 4,750 kilometers, which means it could fly a very long distance before needing more fuel.

The plane weighed up to 45 tonnes at take-off. That is heavier than eight large elephants! It flew as high as 7,000 meters above the ground. Special gear on the nose and tail helped it find submarines hiding under the water.

China only built seven of these planes between 1985 and 1991. The Chinese navy used them for over 25 years, from 1986 to 2012. The planes flew over the South Sea, the East China Sea, and the Yellow Sea. They searched for submarines and helped rescue people at sea.

Fun Facts

The SH-5 could take off and land on the open ocean like a giant seabird.
Its first test flight happened on 3 April 1976, after eight years of design work.
The plane was heavier than eight large elephants at full take-off weight.
It had four turboprop engines, each one producing 3,150 horsepower.
Only seven SH-5s were ever built, making it one of the rarest planes in the world.
The SH-5 replaced an older Russian flying boat that China had used since the 1950s.
A special boom on the tail could detect metal from submarines hidden under the sea.
The SH-5 served the Chinese navy for 26 years before it was retired in 2012.

Kids’ Questions

What made the SH-5 special compared to other planes?

The SH-5 could land on water, not just on runways. It was the only flying boat China ever designed by itself. Most planes need a runway, but the SH-5 used the ocean as its landing strip.

What did the SH-5 do in the navy?

The SH-5 had two big jobs. It searched for enemy submarines hiding under the water. It also helped rescue people who were in trouble at sea.

How did the SH-5 find submarines underwater?

The SH-5 had a search radar in its nose to scan the sea. It also had a special detector on its tail boom that could sense metal objects deep under the water. Together, these tools helped the crew find hidden submarines.

Why were so few SH-5s built?

Only seven SH-5s were made between 1985 and 1991. The source does not give one clear reason why so few were built. But having just seven planes still let the Chinese navy watch over large areas of sea for many years.

Variants

SH-5 (basic): Standard production. 6 sea-surveillance + 1 trainer.

Notable Operators

PLA Naval Air Force (1986-2012): Sole operator. the Hainan-coastal waters + East China Sea + Yellow Sea sea-surveillance.

Frequently Asked Questions

Why did China build a flying boat in the 1980s?

PLA Navy needed an aircraft optimised for South China Sea operations — areas with limited land-based airfield infrastructure. Flying boats can use any large body of water as an operating base, advantageous in island-rich operating environments. China had operated Soviet-supplied Beriev Be-6 flying boats since the 1950s; the SH-5 was the indigenous Chinese replacement. By 2012 land-based Y-8 / Y-9 maritime variants had eliminated the in-service need for flying boats.

Sources

Wikipedia — Harbin SH-5