RAF Hunsdon – The beginnings of Turbinlite (Part 1)

In Trail 25 we head to the south once more, to the west of Harlow, and to two wartime airfields; one of which played a major part in striking a blow at the very heart of the Nazi regime.

The county of Hertfordshire is an area popular with commuters to both London and the technological towns of Harlow and Bishops Stortford. Being north of London, it is also close to Stansted airport, itself an ex World War II airfield. Hertfordshire has some beautiful countryside, delightful little villages and quaint country pubs. It is also an area with a wealth of history.

Our first stop is a small airfield nestled in the heart of this beautiful countryside. It is situated north-east of the village that gives it its name, RAF Hunsdon.

RAF Hunsdon

RAF Hunsdon Village sign

The Hunsdon Village sign reflects its history and links to the RAF.

Even before Hunsdon was built, it is referenced in some areas that the site was being used for a detachment of 107 Squadron Blenheims, then based at RAF Wattisham and later Leuchars. This may have been part of the ‘Scatter’ directive given to squadrons in the immediate period before war was officially declared, and was thought to occur between May 1939 and March 1941.  However, there are no references to this in the official squadron files and so this action is doubted. However, if this were the case, then it would certainly suggest an early use of the site before it was developed into a fully operational airfield, and it may have been an indication that an airfield was on its way in the near future.

The site was earmarked for development in 1940, with construction occurring over the period October 1940 to March 1941, after which the first squadron moved in. It was built by various construction companies and incorporated two asphalt runways; the main running east-west reaching 1,750 yards in length after its later extension, with a second running north-east to south-west  extended to 1,450 yards; both were built to the standard 50 yard width. Aircraft dispersals, maintenance and storage buildings consisted of eighteen ‘twin-engined’ hardstands; sixteen blister hangars (a mix of ‘Over’ (4) and  ‘Extra Over’ (12)) and a Bellman hangar. There was also a fuel dump and accommodation buildings for up to 2,240 airmen and some 276 WAAFs, all located across eight dispersed sites.

A large number of operational units, (in excess of twenty-five) would pass through its doors throughout its relatively short life, providing Hunsdon with a multinational mixture of crews and a number of aircraft types.

The airfield itself lies within a stone’s throw of London and so its initial role was that of night fighter operations covering London and the south / east area.

The first recognised squadron to make its mark at Hunsdon was 85 Squadron on May 3rd 1941, transferring across from RAF Debden flying Defiants and Havoc MK.Is. The move across on the 3rd went smoothly with personnel and equipment being transferred across in lorries and 32 seat busses, the majority of personnel arriving later that day.

RAF Hunsdon Parachute store

The Parachute store now holds farm machinery.

On arrival at Hunsdon, personnel of ‘A’ Flight were immediately billeted on the aerodrome close to their dispersals, whilst those of ‘B’ Flight were housed on Number 2 Site, located about a mile or so from the main airfield area. Personnel of both the Headquarters Flight and the servicing Echelon were billeted even further away, about four miles in fact, at Gilstone Park. The officers meanwhile, had the better accommodation, being billeted in a house called ‘Boningtons’ believed to be the former home of “Mr. Brooke Bond” the family of the P.G. Tea empire. It is thought that the family purchased the house in 1940, moving out of their London residency to avoid the blitz. Unfortunately, it was rather a short lived purchase as the property was requisitioned by the RAF not long after!

By the end of the 4th, all 85 Sqn personnel were in and unpacked at Hunsdon, and so night flying duties could commence straight away with patrols taking place over the Felixstowe area. Immediately, a Heinkel He.111 was vectored onto, and a skirmish took place in which both aircraft both gave and received machine gun fire. The Luftwaffe bomber came off worst though, and was last seen diving into cloud firing a white verey pistol, either as a resignation of the fight or possibly as a distress signal to any would be rescuers.

Over the next few nights further contacts were made and several Ju. 88s were either confirmed or claimed as shot down. The squadron was performing well, morale was high and all was looking good.

The night of the 13th could have been different for some though. On his return from a patrol, Fly. Off. Hemingway’s instruments failed and with little choice, he gave the order to bale out. After his operator, Sgt. Bailey, had departed the Havoc, Hemingway followed, both men landing in close proximity to each other in the grounds of Much Hadam Hall (a grade 1 listed building built in the early 1700s). Whilst both airmen were safe, Hemingway’s was not the model jump, as he came to rest in a tree in the grounds of the hall. Bailey fared little better, landing rather ungainly on a bucket not too far away. This was Hemingway’s third successful bale out of a stricken aircraft, his previous two both occurring during the Battle of Britain.

On May 17th, Wg. Cdr. Peter Townsend, now with a DSO, flew to Great Massingham, Flt. Lt. Marshall flew to Odiham to test the runway and Flt. Lt. Rabone flew to Heston from where he collected a special and secret Havoc which was to be tested by the squadron. The first flight of this new variant occurred on May 23rd, and was quickly followed by a second aircraft on the 28th, After this, they would then begin testing both aircraft as a new night flying platform.

This particular type of aircraft was the forerunner of what became known as the Turbinlite Havoc, a new design that was the brainchild of one Sidney Cotton.*3

RAF Hunsdon Runway remains

The main runway has been reduced to a track.

With the help of William Helmore, Cotton took out two patents; GB 574970 and GB 574118, each one relating to this new idea. It would be Helmore (an Air Commodore) who would then develop the idea further turning it into what would become commonly known as the Turbinlite system.

Originally designated Air Target Illumination, Cotton’s idea was passed to the Alan Muntz Company, who in conjunction with G.E.C., developed it into what was at the time, the most powerful searchlight in the world, and one that would fit neatly into the nose of a Douglas Havoc, or Boston as it was known in the RAF.

The light was so powerful that it would require a staggering forty-eight batteries each stored in the bomb bay of the aircraft, adding an additional weight to the aircraft just short of 2,000lbs. The light was so strong (1,400 amps) that it would discharge in less than 12 seconds meaning its use was limited to short searches only.

Havoc Mark I (Turbinlite), AW400, on the ground at Burtonwood, Lancashire. This aircraft served with Nos. 1422 and 1454 (Turbinlite) Flights, and with 1459 (Turbinlite) Flight/538 Squadron RAF, before transfer to the USAAF in April 1943. (© IWM ATP 10654C)

The first full prototype Turbinlite aircraft fitted with the unit was Boston W8254 and was flown by Acting Squadron Leader A. Clouston of 1422 (Night Fighter) Flight formed at Heston on May 12th 1941. The Flight would then operate a number of these aircraft, along with several other types which included the only Turbinlite Mosquito; along with a Defiant, Wellington and Hurricane.

Heston was the home of Airwork, an aviation company set up by two ex-Cambridge students and soldiers of the great war, Sir Henry Nigel Norman and Alan Muntz.  Their vision, was to create the best aerodrome near London, a dream that would cost Norman his life and Muntz to lose his son. Airwork would go through many changes during its life, taking on several Government contracts including a range of flying schools to train RAF pilots throughout the Second World War. These included RAF Digby, RAF Grangemouth, RAF Scone (Perth) and RAF Linton-on-Ouse.

Airwork would themselves modify a further four Bostons, with a further sixteen being modified by the Heston Aircraft Company. A third batch was then developed at RAF Burtonwood, giving a total of nine flights for training and ten operational squadrons comprising just short of 100 aircraft in all.

It was soon realised however, that the Bostons lacked firepower and so the company began to look at the Mosquito as a possible replacement aircraft. Only one Mosquito was modified (W4087, a Hatfield built F.II) at Heston, but this idea, unlike the Boston, failed to progress any further than the prototype stage, and no other aircraft were converted.

The Only Mosquito converted to carry the Turbinlite.*5

The Turbinlite project quickly gained pace, but the units wouldn’t be raised to squadron status until September of the following year. In preparation, ten special Havoc flights were created to train crews to operate the aircraft. The first of two, formed at Hunsdon (and the first of the ten) was 1451 (Fighter) Flight on May 22nd 1941. The Flight used several examples that included both Boston IIIs (AL469 and Z2280) and Havoc Is (AE470 and AW405). It also utilised a Cygnet and Tiger Moth for pilot training. By the end of the month, 85 Sqn had flown a total of 505 hours, 482 of them undertaken in Havocs, with 213 of these being on night flights.

On August 9th 1941, 85 Sqn were joined here at Hunsdon by 3 Sqn, one of the original three squadrons to have been formed by the Royal Flying Corp. Created on May 13th 1912, when the Air Battalion of the Royal Engineers was absorbed in to the month old Royal Flying Corps, 3 Sqn joined both 1 and 2 Squadrons as the oldest units to have operated in the RFC. As such, its history is long and very distinguished.

In Part 2 we see how the Turbinlite develops, and how, as the war goes on, the first of Mosquitoes arrive.

The full story of RAF Hunsdon can be read in Trail 25.

RAF Little Walden (Station 165)

Sometimes, we come across quite unexpectedly, something of great interest. Whilst on my travels recently, passing through the southern regions of Cambridge into Essex, I came upon the former station RAF Little Walden. Being an unplanned visit, I was rather short in prior knowledge and preparation, no maps, aerial photographs, or other documents that I normally seek out before venturing off into the wilderness. So I was quite unprepared when I stumbled across the Watch Office from former station RAF Little Walden, otherwise known as Station 165 of the USAAF.

RAF Little Walden (Hadstock) – (Station 165)

Little Walden lies slightly closer to the village of Hadstock than it does Little Walden, and was originally called Hadstock. When construction began in 1942, it was allocated to the Eighth Air Force as a Class A bomber airfield. However, due to the bad winter of 1942/43 work ceased temporarily, being held up until well into the summer of 1943. At this point, Hadstock became known as Little Walden, a name change that coincided with the formation of the Ninth Air Force in Europe, an organisation whose primary role was the support of ground troops in the European theatre. With its headquarters at Sunninghill Park1 in Ascot, it would operate both transport and bomber units, taking many of these units (and their airfields) from the already established Eighth Air Force. Little Walden was one such airfield passing from the Eighth to the Ninth to fulfil this new role.

Although a Class A airfield, Little Walden’s main runway was slightly shorter than those of its counterparts, 1,900 yards as opposed to 2,000 yards, but the two auxiliary runways were both the standard 1,400 yards in length. A concrete and wood chip construction gave these runways good strength, it also had hardened perimeter tracks and fifty hardstands of the spectacle type. Grouped mainly in blocks of five, they were located around the perimeter track with a further block of eighteen to the north-west of the site. In the development process a public road the B1052, was closed as it passed directly though the centre of the proposed site.

Little Walden Watch Office

Little Walden’s Watch Office is now a private residential property.

A large bomb store lay to the west of the airfield, surprisingly close to the majority of the hardstands, any major accidental discharge being likely to cause substantial damage to parked aircraft. There were four areas within the bomb store, each holding 200 tons of bombs and tail units, further stores held pyrotechnics, incendiaries, ‘small’ bombs, grenades and small arms ammunition. Most of these were secured by earth banks with fusing points (both ultra-heavy and heavy-light) being held in temporary brick buildings.

To the eastern side of the airfield lay the technical area, with one of the type T2 hangars (the second being located to the north), a fire tender shelter, and a watch office designed to drawing 12779/41 – the standard airfield design of 1942/43. Behind this, lay the main technical area, with its usual range of dingy stores, MT (Motor Transport) sheds, parachute stores and a wide range of ancillary buildings.

Accommodation for staff was, as usual by now, dispersed over eleven sites, a sick quarters, communal site and WAAF site accounting for three of them. A further sewage works made the twelfth site. All-in-all accommodation was provided for just short of 3,000 men and women of mixed rank.

On March 6th, 1944 the airfield officially opened, the day before its first residents arrived. The 409th BG were a new Group, only constituted on June 1st, the previous year (1943). They trained using Douglas A-20 Havocs (known in British service as the Boston) a twin engines light bomber capable of carrying up to 4,000lb of bombs.

The 409th BG formed at Will Rogers Field (Oklahoma) and transitioned through Woodward and DeRidder bases before arriving in the UK. Between March and September they operated out of Little Walden, bombing V-weapons sites and airfields in France in a strategic role. Initially they performed in the low-level role, but soon moved to higher altitudes, performing their first mission on April 13th 1944.

In the short period of residency at Little Walden, the 409th would lose a number of aircraft, one of the first being that of #43-9899 of the 642nd BS, which was written off in a landing accident on April 22nd 1944. Three days later a second aircraft, #43-9691, would also crash-land at Little Walden being damaged in the process.

May would also prove to be a difficult month for the 409th, with one aircraft ‘lost’ on the 9th, a further crash landing on the 11th, another lost on the 22nd and two further aircraft lost (classified as MIA) on the 27th. It was on this mission that a further Havoc would collide with a low flying Mustang resulting in several tragic deaths.

Havoc #43-10130 of the 643rd BS, piloted by Captain Roger D. Dunbar took off from Little Walden heading south-east, when it collided with P-51B #42-106907 of the 503rd FS, 339th FG, piloted by 2nd Lt. Robert L. Dickens. The Mustang, on a training flight, disintegrated killing the pilot, whilst the Havoc crashed into the farmland below. In the ensuing fire, a local farmer’s widow and trained nurse, Betty Everitt ran to the scene and managed to pull one of the airmen out of the aircraft. When returning to retrieve another crewman, one of the bombs on board the aircraft exploded killing her, her small dog, a helping Staff Sgt. and those left inside the aircraft. As a thank you to Betty, the US airmen, from the base, raised almost £3,000 to provide an education for her four-year old orphaned son, Tony2. This was not a one-off either, a fund set up by Stars and Stripes and the British Red Cross, aimed to raise funds for children who had suffered the loss of one or both parents. The amounts raised went a long way to getting these children an education that they would not otherwise have had.

Early June would see another such tragedy, when three more Havocs would collide. Havocs A-20G #43-9703 and #43-9946, both of the 641st BS, would crash whilst the third aircraft managed to land at the airfield. #43-9703 was piloted by Joseph R. Armistead, whilst #43-9946 was piloted by Thomas A. Beckett. A young girl, Marjorie Pask, ran to help, pulling two airmen out of the wreckage then waiting with them until help arrived. Five airmen including the pilots and an air gunner, Staff Sergeant Albert H Holiday, were all killed. It was not until later that Marjorie realised that there were many bombs scattered around the site and how much danger she had been in 3.

Staff Sgt. Albert H Holiday, killed June 11th 1944 in a collision between two Havocs of the 409th BG. (IWM-UPL 21530)

With two further loses and a forced landing in June, it was be a difficult month for the 409th. The late summer months of July and August would be lighter but by no means a clean sheet. In September 1944, on the 18th, the 409th were moved out of Little Walden and posted to a forward Landing Ground A-48 at Bretigny, where they would continue to suffer from landing accidents, Flak and fighters.

Next at Little Walden came the Mustangs of the 361st FG, in a move that saw possession of Little Walden pass back into the hands of the Eighth Air Force. Station 165 was now back with its original owners.

The 361st FG were the last of the P-47 Groups to arrive in the UK. Initially based at Bottisham, they converted to the P-51 in the weeks leading up to D-day. Using the Thunderbolts they earned a reputation as a strong and determined ground attack unit, hitting rail yards and transportation links across France.

A short break whilst transferring from Bottisham to Little Walden gave a somewhat minor break for the 361st. But, following changes to the Eighth’s overall structure, it was soon back to normal and more attacks over occupied France. In October, Lt. Urban Drew shot down two Me 262s who were in the process of taking off from their airfield at Achmer. What was more remarkable about the attack was that Lt. Drew had only arrived in the U.K. a few days earlier, had been grounded for a Victory Roll and then went on to become an Ace shooting down six enemy aircraft and the first pair of 262s! He was awarded the Air Force Cross, being denied the Distinguished Flying Cross until after the war when records from both the Luftwaffe and US Air Force were able to confirm his dramatic claims.

The Christmas and winter of 1944-45 was notoriously bad, very cold temperatures, fog, frost and ice played havoc with operations. The Battle of the Bulge was raging and the allies were finding it all but impossible to provide assistance from the air. Many Bomb Groups suffered terrible tragedies as collisions and accident numbers increased in the poorer weather. The Ninth, who themselves had primary roles in ground support were finding it particularly difficult. To help, a selection of men and machines from the 361st (and 352nd from Bodney) were transported to France and the airfields at St. Dizier (Y-64) and Asch (Y-29) where they were seconded into the Ninth Air Force.  The main force back at Little Walden continued to support bomber missions whenever they could, a difficult job in often appalling conditions.

Duxford American Airshow May 2016

‘Ferocious Frankie’ #44-13704 (374th FS, 361st FG). The original crashed during a wheels up belly landing at RAF Little Walden, on November 9th, 1944. (This aircraft was flying at the Duxford American Airshow May 2016).

Aug 2015 317a

‘Ferocious Frankie’ (named after the wife of Lieutenant-Colonel Wallace E. Hopkins) seen at the Eastbourne Air Display August 2015.

By the end of January the seconding to the Ninth came to an end and the entire Group moved across to Belgium and Chievres, a former Belgian airfield captured and used by Luftwaffe bombers during the earlier years of the war. The 361st would remain there until April 1945 whereupon they returned back to Little Walden. During their absence Little Walden was made good use of. Being a ‘bomber airfield’ by design, its runways and hardstands were put to good use by Debach’s 493rd BG and their B-17 ‘Flying Fortresses’ whilst their own airfield was repaired and strengthened.

Spending only a month at Little Walden, the Air Echelons of the 493rd BG would depart in the April as the 361st FG returned. On the 20th, the 361st would fly their last operational mission, a flight that would close the record books culminating in a total of 441 missions. As the war ended and personnel were sent home, crews and aircraft of the 361st were dispersed to depots around the U.K., those that were left were sent home via the Queen Mary from Southampton arriving in New York in early November 1945. Within hours the group was disbanded and the men scattered to the four winds.

Between early September and early October 1945, the 56th FG ‘The Wolfpack’ were brought to Little Walden. The aircraft were also dispatched to depots around the country whilst personnel were brought to Little Walden for onward transportation to the United States. By mid October they too had gone.

Little Walden then began the wind down, transferring back to RAF ownership in early 1946. For the next twelve years or so, it was used to store surplus military equipment before they were sold off. After that, the site was returned to agriculture, the majority of the buildings pulled down and the runways dug up for road building hardcore.

The control tower stood for many years derelict and forlorn, until being purchased by an architect in 1982, eventually being turned into a private residence, the state it exists in today. The closed road has since been restored, utilising part of the NE-SW runway. Other parts that remain being a public footpath, but all a fraction of their former selves and no more than a tractor’s width wide.

What’s left of the technical area is a small industrial unit, remaining buildings being used for storage or small industrial companies. An access road from the B1052 passes the site an on to private residencies.

Little else survives of Little Walden. Memorial plaques are believed to be mounted on the side of the watch office, although I could not see these when I visited, and the village memorial mentions those who were stationed at the airfield.

The serenity of Little Walden does nothing to reflect the goings on here over 70 years ago. The aircraft are gone, the bird song replacing the sound of engines, and the busy runways now a small road. For those who were lost here, the watch office stands as  a memorial to their memory and the dedication shown by the many young men and women of the USAAF.

Sources and further reading.

1 Sunninghill Park was originally part of Windsor Forest and dates back to the 1600s and King Charles 1. Its ownership changed hands several times, and in the early 1800s during the Georgian period,  a large house was built upon it. The Ninth Air Force made it their headquarters between  November 1943 and September 1944, after which, in 1945, it was sold to the Crown Estate as a future home for Queen Elizabeth and Prince Philip, Duke of Edinburgh. However, before their marriage, the house burned down and the site remained unoccupied until the 1980s when a new property was designed and constructed for the Duke and Duchess of York. However, it was never occupied, the house fell into a very poor state of disrepair and was bought for £15m by an overseas investor. The site continued to decay and by 2014 was ordered for demolition.

2The Troy Record Newspaper Archives, Page 20, June 5th 1944 accessed 10/3/19.

3The full story can be read in ‘Balsham, A Village Story 1617-2017‘.

Little Walden is a new addition to Trail 46