Grant CDL tank- case report

Gents!!  

  

        This is another example of the British CDL family of tanks (plus Matilda and Churchill): the Grant Canal Defense Light - CDL tank. I built this vehicle in 2007, but I did an up-grade in the kit while rebuilding the Matilda II CDL. Let's see the all project.

Grant CDL tank (late)  - 79th Armoured Division

History:

      As the Nazi war machine wrought death and destruction in Europe and North Africa, the British Army’s top brass turned its attentions to Cumbria and the development of a powerful new weapon. There are few people today who know the incredible story of the canal defence light, and how the farmland around Penrith became a testing ground for this device.

      As engineers worked to perfect the weapon – designed to dazzle the enemy on the battlefield – farmers endured bizarre conditions.

      Shepherd Norman Hudson could only tend his sheep after producing a special pass, obtained after a rigid security check, before an armed sentry waved him through the canvas curtain surrounding his field. Behind the barrier was Lord Lonsdale’s flock of black-faced ewes, grazing the fields five miles from Penrith.

      It was 1942, three years in to World War Two, and Norman, sworn to secrecy, was one of very few who knew of the hush-hush secret weapon. The incredible story was told by the late Lord Lonsdale, in a short history of farming on the Lowther estate.

      Lowther Castle – together with several thousand acres of local farmland – was requisitioned by the War Office.

Lowther Castle

      “Lowther Castle, uninhabited since 1935, became the centre for weapon development,” wrote the late Lord. The weapon – known as CDL – was a high intensity intermittent light fitted in tanks to illuminate a battlefield.

      At the time, German advances in North Africa were seen as a threat to the Suez Canal, the all-important short cut linking the Mediterranean and the Indian Ocean. The problems of defending it against a night attack forced the army to consider ways of illuminating the canal. CDL was their answer. The idea – conceived in 1915 by the late Royal Navy Commander Oscar de Thoren – was to use powerful projectors on tanks to enable them to move at night-time, dazzling the enemy.

      The 13,000,000 candlepower light came from a carbon arc lamp picked up by a system of reflectors to produce an intense beam through a slot two inches wide and 24 inches high and set in the front of the armoured turret.

The 13.000.000 candle power light  (Bovington)

 

CDL turret  (Bovington)

CDL turret (early version)
Note the turret ring, the presence of the cast side hatch (later deleted)
and the absence of the dummy gun next to the Besa machine gun.

      Initial trials were carried out in France in 1937. As the war dragged on, a suitable site had to be found for trials and further development work in the UK. Lieutenant Colonel Duncan decided on Lowther Castle and the surrounding farmland.

      Soon Nissen huts were erected on the forecourt while thousands of tons of concrete were poured, transforming the castle and grounds. The conditions in which the first tank was converted were rough and ready. Marquees were erected, each holding three bell-tents, in an effort to give protection from the winter weather.

Grant CDL (early) from 79th Armoured Division

      The first unit to be trained at Lowther was the 11th Royal Tank Regiment, arriving at Lowther in June 1941. During the first week some 50 Matilda and Churchill tanks arrived, their crews having no idea why the security measures were so tight at Lowther.

      The illuminating power of the lights from a squadron of 16 tanks was such that it was possible to read a newspaper on a dark night in the Penrith, five miles away.

Lowther Castle under CDL lights

      The training and development continued for nearly two and a half years. Normal life for the farmers quickly became impossible as their fences and stone walls were demolished and the fields churned by the tanks.

      It became necessary for the farmers at Highfield, Woodhouse, Winder Hall and Celleron to sell their stock, but there was compensation.

Grant CDL in the fields of Lowther Castle - Notice the terrain...

      Wartime top brass were VIP visitors to the first large scale demonstration at Lowther Castle on May 5, 1942. They were followed in December of that year by King George VI and Prime Minister Winston Churchill.

Cartoon with Sir Winston Churchill peeing, illuminated by a
Churchill CDL in Lowther Castle (Sutherland)

      As D-Day neared, morale soared among the Lowther-trained crews of the 300 Matilda, Churchill and Grant CDLs tank operators. But so little interest was taken in the new weapon by field commanders that it was not until August 11 that the first of these formations was landed in France.

Grant CDL heavily camouflaged. Notice the M3 type bogies

      Eventually, the CDL battalions were ordered to disband after a brief moment of glory when they called on to assist at the crossing of the German rivers Rhine and the Elbe, with the 79th Armoured Division.

      The converted tanks and 6,000 men trained in their use finally left Lowther Castle in March 1945, their potential having never been realised. At Lowther, the miles of flattened dry stone walls were rebuilt so there is now little to be seen of its wartime use.

      Major General John F. C. Fuller, a military historian and strategist, later said: “I regard the failure to use this tank as the greatest blunder of the whole war. The course of history might have been changed immeasurably for the better had it been properly employed.”

Major General John F. C. Fuller

Published by http://www.cumberlandnews.co.uk

Specs:

Grant CDL tank
Type	CDL tank
Place of origin	United Kingdom
Service history
Wars	World War II
Production history
Produced	August 1941 December 1942
Number built	???
Specifications
Weight	27 t
Length	5.64 m
Width	2.72 m
Height	3.12 m
Crew	6
Armor	up to 51 mm
Main armament	Arc Light Weapon Carbon Arc Spotlight 13.000.000 candles
Sec. armament	75 mm Gun M2/M3 in hull - 46 rounds 7.92 mm Besa MG  2.000 rounds
Engine	Wright (Continental) R975 EC2 400 hp (300 kW)
Transmission	Synchromesh 5 speeds forward x 1 reverse
Suspension	vertical volute spring
Ground clearance	0.46 m
Fuel capacity	662 liters
Operational range	193 km
Speed	42 km/h (road) 26 km/h (off-road)
Steering system	Controlled differential

The kit:

      For this project, I used an old Tamiya kit, true scrap, for this situation...I like to buy friends' badly built kits, because they cost very a little and they are an excellent source of opportunities to build oddballs with minus cost.

The recipe:

- Chassi Lee Tamiya painted and scrapped (light green)

- Hull Lee Tamiya, with scratchs e modifications, from another Panzerserra´s scrap (dark green)

- Italeri´s Sherman M4A1 bogies (scrap, again)...

- Resin kit, an old kit Verlinden, the only new kit in this project...(and the turret with wrong shape)

- Metal gun barrel from RBModels (75mm)

- Italeri´s vinyl tracks (the scrap chassi wearing the old Tamiya's vinyl tracks- awful!!) 

- Some wires and aluminium stripes......

The tank - Notice the different colors and the Tamiya tracks (to be replaced)

The rear panel was re-worked (cut using drawnings of the Grant tanks)
Rear armour from Sherman M4A1 (Italeri), with air-filters and exhaust pipes

Resin parts from Verlinden

      The 75 mm gun canvas was made with silk-paper and PVA-glue:

The Grant still using the Tamiya's tracks...

      The two CDL tanks under construction...

Grant and Matilda CDL tanks - the turrets are Verlinden, with wrong shape.

Do you know the Grantilda???
Don't worry, it's just a joke with scraps

      But, lets continuing the Grant CDL project:

adding the dummy gun and the Besa MG

The Grant and the Matilda CDL

Primer

Notice the Tamiya's tracks are history, now !!!

Archer decals. I always apply these marks after primer.
Lokk sharper!!!

       Painting:

       And with the markings of the glorious 79th Armoured Division: the Hobbart's Funnies:

Notice the glossy aspect (gloss varnish to prevent silvering)

      For a recycled project, a recycled track: Italeri's vinyl tracks. Not the best, but acceptable !!!

The Italeri's tracks are very "hard". Improving the fit of the tracks

      Now, it's time to work the rollbed of the turret: toillet-paper and silk-paper:

Done...

After painting...

The Grant CDL done...

      Well, in this time (2007), I thought the tank was ready and correct. But the appearance of towers Verlinden was wrong (see more details here). 

The Matilda and Grant with wrong shape turrets (Verlinden)

      When I discovered the error, I decided to fix the tank: Panzerserra turrets !!!

The corrected turret (left) and the Verlinden (wrong-right)

       The new turret in the Grant:

Removing  usable details from the wrong turret

And applying these details in the new turret

Notice the slanted roof

Turret done. Painting time...

Painted and with decals

Almost done. Notice the Matilda Crane in the background

Much better !!!

      And the Girl, re-worked and done:

Grant CDL tank - 79th Armoured Division - Elbe River, Germany - 1945

Grant CDL tank - 79th Armoured Division - left side

Grant CDL tank - 79th Armoured Division - rear view

Grant CDL tank - 79th Armoured Division - right view

Grant CDL tank - 79th Armoured Division with Kojak and Rover, the dog

Grant CDL tank - 79th Armoured Division - Germany, 1945.

Grant CDL tank - 79th Armoured Division and
 Matilda II CDL- 49th Royal Tank Regiment

Grant CDL, Churchill CDL and Matilda CDL : The 03 British night-fighters.

Beasts of the same breed: M3A1 Lee Leaflet CDL (American) and
Grant CDL (British)

and the American CDLs: M3A1 Lee Leaflet and Sherman M4A1 E-type CDL

       Finally, all CDLs of my collection (until now...)

Matilda CDL, Churchill CDL, Grant CDL, M3A1 CDL and M4A1 CDL

      Next, the always mentioned but never confirmed Valentine CDL:

But it's is another history...

See you soon, Gents !!!