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Archaeologists excavate experimental WWII catapult

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Archaeologists from MOLA (Museum of London Archaeology) have excavated an experimental WWII prototype catapult at Harwell in Oxfordshire, England.

Named the Royal Aircraft Establishment (RAE) Mark III Catapult, the system was developed to rapidly catapult bomber planes into the air over shorter runways.

Constructed between 1938 and 1940 in Harwell, Oxfordshire, the catapult had a rotating turntable for guiding aircraft toward one of the two short concrete runways, each measuring a mere 82 metres in length. To initiate the launch, the aircraft was connected to an underground pneumatic ram via a towing hook.

Beneath the turntable, a dozen Rolls-Royce Kestrel aero engines were deployed to pressurize air to 2,000 psi, which was channelled into a pneumatic ram causing it to swiftly extend along the guided track. The result was a literal catapulting action that propelled large bomber planes into the air.

The prototype encountered various design issues, such as engine wear and a design mismatch with the intended bomber planes. The project was subsequently abandoned, and by 1941 the structure was filled in and a conventional runway built across the end of the southern arm of the catapult system.

In preparation for the development of the land, archaeologists from MOLA conducted a detailed study of the WWII relic and faithfully recreated a 3D digital replica of the remains.

Susan Porter, MOLA Project Officer, says: “This fascinating structure reminds us of the rapid experimentation and innovation of the interwar years and WWII. Crucially, recording the location and appearance of every inch means that the catapult is preserved by record for future generations.”

The team also uncovered finds from a later runway in the vicinity, including large runway lights, roughly 1m square, and a previously unknown gun emplacement that defended the runway from attack.

Once the study is completed, all the information and discoveries will be preserved in an archive, creating a lasting archival monument of this unique relic from the early days of WWII.

MOLA

Header Image Credit : MOLA

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Archaeology

Archaeologists excavate medieval timber hall

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Archaeologists from the University of York have returned to Skipsea in East Yorkshire, England, to excavate the remains of a medieval timber hall.

Recent excavations unearthed a timber hall measuring 5 metres wide by 16 metres long, which was surrounded by a large ditched enclosure.

The size and shape of the hall is marked by post holes, which the team plan to excavate further to provide new insights into the hall’s purpose and setting in the surrounding landscape.

The hall sits adjacent to a 13-meter-high mound, once presumed to be a motte and bailey castle. However, carbon dating has since revealed its age to be 1,500 years prior to the Norman Conquest era from during the Iron Age.

Dr Jim Leary, from the University of York’s Department of Archaeology, said: “The unearthing of timber buildings dating to the period between the collapse of the Roman Empire and the arrival of the Vikings, a time often referred to as the Dark Ages, is an incredibly rare and significant find.

“The discovery at Skipsea is particularly interesting because we know that the area was in the hands of the last Anglo-Saxon King of England, Harald Godwinson, and then later, after the Norman Conquest of 1066, it became the estate centre of the Lords of Holderness.”

Skipsea was once home to three freshwater lakes, Skipsea Bail Mere, Skipsea Low Mere, and Skipsea Withow Mere, linked to the River Hull through a network of tributaries. These lakes (long-vanished), began 10,000 years ago during the Mesolithic period, and continued into the medieval period.

The lakes were a constant draw to population groups throughout history, which has provided archaeologists with Mesolithic stone tools, animal remains, bone harpoons, and Bronze Age buildings and trackways.

Header Image Credit : University of York

Sources : University of York

This content was originally published on www.heritagedaily.com – © 2023 – HeritageDaily

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Archaeology

Archaeologists find traces of Gloucester’s medieval castle

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Archaeologists from Cotswold Archaeology have uncovered traces of Gloucester’s medieval castle in Gloucester, England.

The castle was first constructed during the Norman period as a simple motte and bailey. Over the centuries, various additions and periods of reconstruction extended the footprint of the castle, which by the 13th century became a royal residence for nobility and English kings.

Between the 15th century and 17th century, the castle went into decline and much of the stonework from the fortifications were used to construct roads and buildings within the city centre, leaving only the keep which was used as a gaol (prison).

In time, the keep was considered to be unsuitable and its demolition began in 1787, leaving no visible remains of the castle.

Image Credit : Cotswold Archaeology

During development works in the south-west of Gloucester city centre, archaeologists from Cotswold Archaeology have uncovered traces of the castle beneath the basketball court of the former HMP Gloucester.

A number of trenches revealed medieval structural remains that archaeologists have interpreted as forming part of a masonry causeway or bridge structure. This provided access to the castle across its inner defensive ditch and continued north-east onto Castle Lane.

Excavations also found subsequent demolition and robbing of stonework, evidenced by the infilled castle ditch, and comprised cultivation soils of the Castle Gardens, which occupied this area from the later 18th century through to the mid-19th century.

In addition, a stretch of Post-medieval wall relating to the gardens was identified, which corresponds to a boundary shown on early and mid-19th century maps.

According to the archaeologists: “The results highlight that significant archaeology continues to survive at a relatively shallow depth, enabling us to trace historic land use and landscape change within this part of the city across many centuries.”

Header Image Credit : Cotswold Archaeology

Sources : Cotswold Archaeology

This content was originally published on www.heritagedaily.com – © 2023 – HeritageDaily

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