Tag: listed

ROC Observation Post and Memorial get Listed Building Status

Historic England have now made the Royal Observer Corp underground monitoring bunker a Grade 2 Listed Building.   Likewise the Canadian Memorial sited in front of the former WW2 Watch Office is also given Listed Status.  This joins Primemeads which was listed earlier in 2017.

Interior of ROC Post Dunsfold
Dunsfold Canadian Memorial
Unveiling of memorial in 1942

Visits: 95

Engine running pens – Listed Grade II

Three pens were arranged in a curve. One has been completely removed. Of the two remaining; the unique example survives that was used to test all ‘jump jets’ or VTOL. The VTOL pen is lined with metal sheeting and sound absorption. Historical significance is for the development of the ‘jump jet’, P1127 through to the Harrier.

In 2022 aerial views you can see the remaining two pens plus the site of the third to the West.

Three engine running or detuning pens were originally built in the early 1950’s to test the aircraft engines for the Hunter prior to delivery. By 1960 the Eastern-most of the three pens was modified specifically for engine testing of the P.1127 and later the Harrier. This pen was modified and excavated to form a void which was fitted with a blast grid to diffuse vertical thrust. At the rear of the pen, a new diffuser was fitted to contain thrust when the engines were vectored to the rear. At the same time, a second control room was added and the inside of the pen was fitted out with metal covered insulation. A double-depth metal sliding door was also installed at the entrance so that when closed, noise and debris were suppressed.

As CTP Bill Bedford recounted, in 1960 when undertaking the first testing of the engine for the prototype P.1127 there was an engine fire. The “elephant ears” noise baffles either side of the aircraft had to be rapidly moved out of the way to allow fire crew to access the exhaust to dowse the fire.

The first P.1127, XP831, in the ground running pen at Dunsfold with Rolls-Royce representative John Vowles in the cockpit.  Photo courtesy BAE Systems via Brooklands Museum
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Visits: 448

Compass Swing Base

Circular concrete platform marked out in degree divisions accurately aligned with local magnetic north. The aircraft is placed on the pad in a series of angular positions and the reading of the aircraft’s magnetic compass is compared with the true heading on the pad. The aircraft system is then adjusted to match and any unresolvable residual errors are recorded. This process is called ‘swinging the compass’. A magnetic compass on an aircraft is influenced by the magnetic materials and components in the aircraft. Nearly all airfield had such bases, but they are now rare due to commercial pressures for space.

Compass swing base



Please note: The aerodrome is private land and an active airfield. Access is not permitted to some of the buildings and features and we strongly discourage access without permission.

Visits: 715

Bofors Gun Emplacement

Bofors Gun Emplacement

Bofors Gun Crew Hut

Bofors Gun Emplacement


Please note: The aerodrome is private land and an active airfield. Access is not permitted to some of the buildings and features and we strongly discourage access without permission.

Visits: 316

Control Tower

1952 Squadron-Leader Neville Duke, flying the Hawker Hunter, took off from Dunsfold in Surrey to make an attempt on the hundred-kilometre closed circuit record. His speed was 709.2 and a “Victory Roll” marked this, his second air speed triumph.

WWII Watch Office stands in the centre of the northern side of the main runway industrial heritage. The majority of these types of buildings on airfields have been removed.

Latter known as a Control Tower, the visual control room [VCR] was added to bring it in line with air traffic control – steel framed clad with anti-glare glass. Precast concrete stair internally.

Designed by the architect: Frank H Lambert and has the Dwg No: 12779/41. It is a rare example that includes the latter Air Traffic Control (ATC) to second floor.

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1950s Control Tower interior
1952 Dunsfold Control Tower
1986 Dunsfold Control Tower
2016 Dunsfold Control Tower

Visits: 979

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