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Fairchild (Kreider-Reisner) XC-31: American Transport

The Kreider-Reisner XC-31 or Fairchild XC-31 was an American single-engined monoplane transport aircraft of the 1930s designed and built by Kreider-Reisner. It was one of the last fabric-covered aircraft tested by the U.S. Army Air Corps. Designed as an alternative to the emerging twin-engined transports of the time such as the Douglas DC-2, it was evaluated by the Air Corps at Wright Field, Ohio, under the test designation XC-941, but rejected in favor of all-metal twin-engined designs.

The XC-31 was built with an aluminum alloy framework covered by fabric, and featured strut-braced wing and fully retractable landing gear, with the main gear units mounted on small wing-like stubs and retracting inwards. An additional novel feature was the provision of main cargo doors that were parallel with the ground to facilitate loading.

Following evaluation by the USAAC, the XC-31 was transferred to NACA, which used it for icing studies at its Langley Research Center.

Role: Single-engine transport

National origin: United States

Manufacturer: Kreider-Reisner; Fairchild Aircraft

First flight: September 22, 1934

Primary user: United States Army Air Corps

Number built: 1

Crew: 1 (Pilot)

Capacity: 15 passengers or 3,500 pounds (1,600 kg) of cargo

Length: 55 ft 5 in (16.89 m)

Wingspan: 75 ft 0 in (22.86 m)

Height: 15 ft 10 in (4.83 m)

Wing area: 802 sq ft (74.5 m2)

Empty weight: 7,322 lb (3,321 kg)

Gross weight: 12,750 lb (5,783 kg)

Powerplant: 1 × Wright R-1820-25 radial , 750 hp (559 kW)

Maximum speed: 154 mph (248 km/h, 134 kn)

Cruise speed: 143 mph (230 km/h, 124 kn)

Range: 775 mi (1,247 km, 673 nmi)

Service ceiling: 15,000 ft (4,570 m)

 

Fairchild XC-31 (34-26), US Army Air Corps, circa 1934.

Fairchild XC-31 (34-26), US Army Air Corps, circa 1934.

Fairchild XC-31 (34-26). Note the unusual cargo loading door parallel to the ground while parked rather than parallel to the cabin floor.

Fairchild XC-31 (34-26).

Fairchild XC-31 at Langley.

Fairchild XC-31 (34-026).

Fairchild XC-31 (34-026).

Fairchild XC-31 (34-026).

Fairchild XC-31 (34-26). The large XC-31, built by the Kreider-Reisner division of Fairchild aircraft was used, in part, for icing studies while with the NACA at Langley. This is the only example of the type ever built. 10 October 1938.

Fairchild XC-31 (34-26).

Fairchild XC-31 (34-26). This “winged boxcart” was designed by the Kreider-Reisner company but built by Fairchild after that company acquired Kreider-Reisner in 1934. The XC-31 was a single-engined transport aircraft of at the time already too conventional fabric covered construction born in the nascent multi-engined all-metal aircraft era. Not all was boring in the XC-31 though. It had a pretty neat retractable landing gear and, to facilitate loading, its cargo doors were parallel to the ground. In the background is a Douglas DC-2 (maybe the XC-32 or a YC-34).

Fairchild XC-31 (34-26), tail code 303.

Fairchild XC-31 (34-26).

Fairchild XC-31 (34-26).

Fairchild XC-31 (34-26).

Fairchild XC-31 (34-26).

Fairchild XC-31 (34-26).

Fairchild XC-31 (34-26).

Fairchild XC-31 (34-26) interior.

Fairchild XC-31 (34-26) cockpit.

Canal Defence Light: British Tank-Mounted Carbon-arc Searchlight

The Canal Defence Light (CDL) was a British "secret weapon" of the Second World War, based upon the use of a powerful carbon-arc searchlight mounted on a tank. It was intended to be used during night-time attacks, when the light would allow enemy positions to be targeted. A secondary use of the light would be to dazzle and disorient enemy troops, making it harder for them to return fire accurately. The name Canal Defence Light was used to conceal the device's true purpose. For the same reason, in US service they were designated T10 Shop Tractor.

Description

The idea is credited to a Greek citizen, Marcel Mitzakis, who devised the system for the de Thoren Syndicate in the 1930s; they were advised by J F C Fuller. The device was demonstrated to the British War Office in 1937. Although three examples were ordered for tests, the trials did not begin until 1940, when the War Office took over and ordered 300 lights for fitting to tanks. A prototype was constructed using a Matilda II tank. The tank's normal turret was replaced with a cylindrical one containing both a 13 million candlepower (12.8 million candela) searchlight and a machine gun.

The searchlight turret included a station for an operator, who had the task of changing the light's carbon electrodes when they burned out. The light emerged from a vertical slit that was just 2 inches (5.1 cm) wide by 24 inches (61 cm) tall, a small size which reduced the chance of battle damage to the optical system. The beam diverged at 19° horizontally and 1.9° vertically, forming a pool of light of around 34 by 340 yards (31 m × 311 m) at a distance of 1,000 yards (910 m). The turret could rotate 360° and the light beam could be elevated or lowered by 10° from the horizontal.

Blue and amber filters allowed the light to be colored as well as white. A shutter could flash the beam on and off, up to twice a second. It was found that the blue light caused the CDL tank to appear to be at a greater distance, and blue and amber light beams from two CDL tanks could combine to illuminate a target with white. A flashing beam would further dazzle and disorient enemy troops by not giving their eyes a chance to adapt to either light or darkness.

The Matilda tank was later replaced by the US M3 Grant, which was superior in several ways. It was a larger, roomier and better-armored tank, also faster and better able to keep up with tanks such as the Sherman. It was armed with a 75 mm gun mounted in the hull and a 37 mm gun in a turret, so could retain some fighting capacity when the searchlight turret was mounted. A dummy gun-barrel fitted to the turret made it resemble a normal M3 tank. The operator was the only occupant of the turret—the vehicle commander had a seat to the left of the driver.

The project was shrouded in secrecy. It was tested during Exercise Primrose in 1943 at Tighnabruaich, Scotland; it was concluded that it was "too uncertain to be depended upon as the main feature of an invasion".

The CDL was shown to senior US officers (including generals Eisenhower and Clark) in 1942 and the US decided to produce their own tanks using the CDL design. The code names "Leaflet" for the tank, and "Cassock" for the training program for crews were used. For secrecy the construction was dispersed. Conversion of the M3 to take the CDL was by the American Locomotive Company as "Shop Tractor M10", turrets were produced by Pressed Steel Car Company as "coast defence turrets", and the arc lamps were sourced through the Corps of Engineers. The final assembly of the CDL tank was at Rock Island Arsenal. By the end of 1944, Alco had produced 497 tanks.

American crews were trained at Fort Knox and in the California-Arizona maneuver area. The six battalions of tanks then moved to the UK to join the British CDL tanks in Wales.

Type: Non–lethal weapon

Place of origin: United Kingdom

Used by:

British Army

United States Army

Wars: World War II

Designer: A V M Mitzakis

Number built:     

300 (Matilda variant)

335 (M3 variant)

Deployment and Combat

The British and American CDL units deployed to the continent did not cross over to France until August, the British as part of the 79th Armoured Division. The British 35th Tank Brigade and US 9th Armored Group were retained in the UK. The system was highly secret as surprise was considered essential to its use. This hampered its employment, as commanders were often unfamiliar with, or did not know of it, and did not consider it when drawing up plans for attack.

Rather than let trained tank crews sit idle, most of the special units were converted either to other special roles (such as mine clearance tanks) or regular tank units.

For the crossing of the Rhine, some CDL units were used. The one British squadron that had not been converted from CDLs was used in the north, 64 American CDL tanks were brought back into use with their former crews. The US tanks were spread across the First, Third and Ninth armies.

Bridge at Remagen

The Allies used the CDLs to protect the Ludendorff Bridge after it was captured intact during the Battle of Remagen. The Germans used virtually every weapon at their disposal to try to destroy the bridge. This included sending frogmen, using Italian underwater breathing apparatus, to plant floating mines but they were discovered by US Army military police, who used Canal Defence Lights to locate and blind the swimmers.

The armor of the CDLs made them more suitable for this task than conventional searchlights as, in some sectors, the East bank of the river was held by German forces who subjected the CDL tanks to considerable artillery and small-arms fire. The use of the system resembled its name, which had been intended to be spurious. Later, the battle moved eastwards and the CDLs were used to illuminate the bridges for the benefit of engineers carrying out maintenance. Conventional searchlights would have been more suitable, but none were available. The CDLs were eventually replaced by captured German searchlights.

Operators

The 11th Royal Tank Regiment was raised in January 1941 and designated for the CDL role in May 1941. The unit trained at Lowther Castle near Penrith, and was based at Brougham Hall, Cumberland. It spent 1942 and 1943 in the Middle East without seeing action, returning to the UK in April 1944. It landed in Normandy on 12 August 1944, seeing no action until 29 September 1944, when it was ordered to transfer all of its equipment to the 42nd and 49th Royal Tank Regiments, and was retrained to operate the American amphibious LVT-4, known by the British Army as the Buffalo Mark IV.

In their turn, the 42nd and 49th Royal Tank Regiments were largely inactive for the remainder of the war and all three units were disbanded after the end of hostilities.

Battalions of the American 9th Tank Group trained using the Grant variant of the CDL tank at Camp Bouse in the Arizona desert. In 1944, before deployment in the European Theatre of Operations, they continued training on the Preseli Hills in Pembrokeshire, West Wales.

Before dawn, at 06:00 on 18 November 1944, CDLs of the 357th Searchlight Battery, Royal Artillery provided hazy indirect light for the mine-clearing flail tanks supporting the infantry in Operation Clipper.

Later Use

Some British tanks were sent to India in 1945. The US Tenth Army requested deployment of CDL tanks for use during the Battle of Okinawa, but fighting there was complete by the time they arrived.

During the Korean War, there was a requirement for searchlights on the battlefield. There was brief interest in resurrecting a CDL on an M4 Sherman design (T52) that had started in 1944, but it was recognized that four battalions could be equipped with normal searchlights for the cost of a single CDL tank.

Surviving Examples

The only surviving CDL-equipped Matilda tank is in the collection of the Royal Armoured Corps at The Tank Museum, Bovington, Dorset, in Britain. One CDL-equipped M3 Grant is displayed at Cavalry Tank Museum, Ahmednagar in India.

Bibliography

Fuller, J.F.C. (1949). The Second World War - 1939-45 - A strategical and Tactical History. Duell, Sloan and Pearce.

Hunnicutt, R.P. (1994) [1978]. Sherman - A History of the American Medium Tank. Presidio Press.

An M3 tank fitted with an armored searchlight turret, known as a Canal Defense Light.

Grant CDL.

Grant CDL.

T10E1 Shop Tractor - experimental American-built CDL on M4A1 Sherman tank hull.

M3A1 CDL.

A Grant CDL testing its beam at Lowther Castle.

An M3 CDL on the Bank of the Rhine, 1945. The device is concealed under a tarp.

Medium M3 Grant CDL with anti-magnetic camouflage coating.

Medium M3 Grant CDL with anti-magnetic camouflage coating.

M3 Grant CDL with extra lights.

Sherman V (M4A4 DV) CDL prototype.

M3 Grant CDL.

CDL-equipped Matilda II on display at The Tank Museum, Bovington, England.

CDL-equipped Matilda II at The Tank Museum, Bovington, England.

The surviving M3 Grant CDL at the Cavalry Tank Museum, Ahmednagar, India.

M3 Grant CDL.

M3 Grant CDL.

M3 Grant CDL.

The CDL Tank M3 name was retained into 1944.

The Nazi "Kamikazes": German Leaders Failed to Recognize a New Counteramphibious Tactic

A postwar report on German efforts to develop a suicide corps to attack the Allied invasion fleet, from the Intelligence Bulletin, June 1946.

One of the most hushed-up secrets of the war, back before the surrender of Japan, was the damage and inconvenience caused by the suicide-bent Kamikaze pilots of the Japanese Air Force. Troops who sailed to the invasion of Okinawa remember the Baka bomb, the winged aerial torpedo with its human pilot. But not until the end of the war, when intelligence officers began nosing around in the former Nazi domain, was it disclosed that a small group of fanatical Nazis had also organized a suicide corps for the purpose of breaking up the seaborne invasion of the Continent with a German version of the Japanese Baka.

In fact, there is much evidence to indicate that the Nazi suicidists were laying their plans long before their Japanese allies conceived the idea for this unconventional tactic. Only bureaucratic inefficiency, and disinterest in official circles as high as Hitler himself, forestalled the appearance of the Nazi kamikazes in the air over Normandy on D-Day.

The inception of this strange project goes back to the year 1943, when the fortunes of war were beginning to turn against the hitherto victorious German Army. At that time, many people in Germany were beginning to see that the Fatherland would ultimately go down to defeat, unless some miraculous event produced a severe setback to the Allied cause. Among these thinking Germans was a small group of idealists who were determined to do something about it. These people, who at first numbered no more than thirty or forty persons, came together from all walks of life. Some of them were from the Army, others were civilians, and one of the leaders was a well-known German woman flyer.

It was the common belief of these people that the war was lost unless a most decisive blow could be struck against the Allies. They believed that this could only be accomplished by the complete disruption of the eventual Allied assault upon the Continent, thus convincing the Allied leaders that Germany was secure and impregnable within her "fortress Europe."

An Idea Is Born

From this line of reasoning, the idea of a suicide corps was born. It was thought that a weapon could be devised in the form of a flying bomb which, when piloted to its target, could sink a large warship or troop transport. Enough of these, the idealists believed, could completely wreck any seaborne invasion with an expenditure of less than a thousand volunteer pilots. The members of this strange group were ready to volunteer. They asked only that they be given a weapon which would be certain to achieve its end, and they felt there were persons among their membership who had the skill to design such a weapon.

By October 1943, under the leadership of the woman flyer, a doctor of the Institute of Medical Aeronautics at Rechlin, and a first lieutenant of the Luftwaffe, organizational plans had advanced to a point where it was necessary to obtain official recognition and cooperation in conducting the project further. Because of her unique position in German aviation circles, this duty fell to the aviatrix.

The woman first presented the idea to the Luftwaffe High Command, and met with immediate rebuff. The German Air Force was not interested in an idea they considered to be the unstable reasoning of a group of psychopaths. After much delay, the Luftwaffe was bypassed, and the aviatrix went directly to Field Marshal Milch, at the time the head of the German Air Ministry. Again no progress was made.

After more weeks had passed, the woman determined to exploit her position and reputation in German aviation circles, and succeeded in gaining a hearing before the German Academy of Aeronautics. This academy had the power to assemble the necessary scientists, technicians, and air tactical authorities, and eventually a meeting was called by the Director of the German Aeronautical Research Council. After a lengthy conference, the committee of authorities decided that the idea was indeed operationally sound.

With this authoritative evidence in hand, the next step for the group of idealists was to obtain official support and leadership for the suicide plan. Application was made for an interview with Hitler, and in February 1944, the woman leader of the project was summoned to Berchtesgaden for a three-hour discussion with the Führer.

Interview with Hitler

Hitler did not approve. He objected to the philosophy of suicide entailed in the plan, and pointed out that there was no precedent in German history like it. Therefore, he said, the whole idea was not in keeping with the character of the German people. The woman countered this with the argument that never before in German history had the fate of the country been in such a precarious position. This, apparently, was the wrong thing to say, for Hitler replied emphatically that the position was not precarious, and that if it ever became so, then he, Hitler, would personally give the orders for such desperate measures to be taken.

The interview was anything but successful, but before she left, the aviatrix did obtain Hitler's permission to continue with the development and planning so that the organization would be ready to operate if ever the Führer felt the time had come to take such desperate steps. His parting remark was to the effect that he did not want to be bothered with the idea again until the time for action was ripe.

Meanwhile, the group of suicide volunteers had grown to about seventy or eighty members. As yet no concerned recruiting effort had been made, and such volunteers as were accepted were a very select group. Once accepted, a candidate for membership in the suicide corps was required to take a pledge to the effect that "I hereby volunteer as a pilot of the manned glider-bomb. I am convinced that this action will end with my death."

On the basis of Hitler's permission to continue with the development of the program, the matter was laid before the Chief of the General Staff of the German Air Force. He half-heartedly assigned the official direction of the project to the commander of a Luftwaffe bomber wing that was engaged in all sorts of special operations and clandestine activities. At first it appeared that the plan was finally on the road to fruition, but it soon became evident that the new commander accepted the assignment mostly because he saw in it the means of receiving the glory and credit which would be brought by the self-sacrifice of the volunteers under him.

The Weapon

But at the same time, the German Air Ministry was ordered to perfect the technical preparations which would be necessary to put the plan into effect. The Messerschmitt Me 328, originally designed as a fighter or fighter-bomber, was selected as the flying weapon to be used by the volunteers. Production of the plane was ordered, but proceeded so slowly that the volunteers began to suspect that some sort of official sabotage was afoot. As a result, the suicide group began to look around for another weapon—one which was easy to produce and would be available on short order. The V-1 "buzz bomb," rebuilt to carry a pilot, was decided upon. In less than three weeks, four types of this piloted missile were ready for testing.

Contrary to the wishes of the volunteer group, the Luftwaffe testing division insisted upon using their own pilots for the test flights. The two Luftwaffe men were soon seriously injured, and it was then that the woman pilot was called in and permitted to do the test flying. It was not an easy proposition. In order to train the suicide pilots, a two-seater "buzz bomb" had been built. Of course, it was necessary to land this model, if trainees were to be kept alive for the D-Day mission. But since it was necessary to glide to a landing without power, and since the missile was not of conventional aircraft or glider design, the approach had to be made at speeds approaching 155 miles per hour.

But as the technical development of the weapon went on with fair success, the rest of the program began to go astray through the bungling of the Luftwaffe officers put in charge of the volunteers. Although the suicide group at first believed the Luftwaffe wing commander—the one who had been appointed their official leader—was fully behind their plan, it soon became evident that he had little interest in the project. What was worse, he appointed a staff of other Luftwaffe officers to responsible planning and operational positions. These officers apparently had no conception of the original mission of the volunteers—to destroy the eventual Allied invasion fleet. Instead, they were continually fostering half-baked ideas, such as suicide attacks upon Soviet ammunition trains on the Eastern Front. Although the volunteers were willing to give their lives to deliver a smashing blow to the Allies, they were reluctant to die on some comparatively non-essential mission. Meanwhile, the training program had also bogged down. Much time was spent in physical education and pistol shooting, but little attention was paid to establishing a sound flight training program. The Luftwaffe lieutenant, one of the original volunteers and who had been the spark plug behind the whole idea, found himself helpless because of his low rank. Although he tried repeatedly to make improvements, he could do nothing but take orders.

Again the woman flyer was called upon to use her influence to try and revive the rapidly failing program. This time she went to Himmler, in hopes that he might be able to do some good for the cause of the suicide volunteers. Himmler was not much help. He was not opposed to the suicide idea, but he was of the opinion that the membership of the corps should be made up of criminals and the incurably diseased. He offered to take over the program if one of his officers was permitted to assume the leadership of the entire plan. It was evident that under Himmler the plan would not receive any better treatment than it was getting under its present supervision, so his offer was turned down.

D-Day Arrives

About this time, the Allies took a hand in things by staging their invasion in Normandy. Neither the suicide weapon, nor adequately trained suicide pilots were available, greatly because of the mishandling the whole program had received from its selfish or uninterested directors. The disappointment of the volunteer group was profound. Within six or seven days after D-Day, they realized that the invasion was a success, and that the moment for which they had been preparing had passed.

But, several days after the invasion had started, and all other efforts to halt it had failed, Hermann Göring suddenly remembered that somewhere in his Luftwaffe there was a group of pilots who had volunteered for a suicide mission. In due course, Göring reached the commander of the bomber wing under whom the volunteers had originally been placed. The commander, a colonel, immediately declared that the group was ready for action. The volunteers were astounded. They knew that no planes or "buzz bombs" were available, and that only a few of the men had any more than the briefest of pre-flight training. Nonetheless, the commander and his technical assistants, without consulting the volunteers, set to work on plans to use a Focke-Wulf FW 190, carrying a 4,000-pound bomb, to crash into selected targets. Now no one in the German Air Force had ever flown this plane with such a large bomb load, and it was highly doubtful that the plane would be able to get off the ground without crashing. Consequently, regular test pilots declined the honor of testing this experimental makeshift aircraft. Undaunted, the commander announced that his suicide pilots—none of whom had ever flown an Fw 190, if any other plane—would within the next few days conduct the test flights themselves. If they were killed, he said, their names and loyal sacrifice would be recorded in German history with the same honor they would have received if they had crashed their plane onto the deck of an enemy ship. Any enthusiasm that had remained among the volunteers disappeared completely at this point.

Fortunately for these men, Hitler heard about the plans for using the Fw 190, and ordered the project abandoned. The bomber commander was removed, eventually, and his successor set about trying to salvage some of the finer ideas of the original project. But by then it was too late. The Allies were established in force on the Continent, the hour to strike had passed, and so the group of suicide volunteers was disbanded.

"And so," to quote the woman flyer, "did an idea that was born of fervent and holy idealism, only to be misused and mismanaged at every turn by people who never understood how men could offer their lives simply for an idea in which they believed."

Conclusion

Were it not for the grievous damage done to our fleet units a year later by the Japanese Kamikaze corps, this German project might be passed off as just another unconventional tactical venture which the German leaders were smart enough to recognize was nothing but foolishness. But in the light of our later experience with the Japanese, it is possible to draw the conclusion that the Nazi command failed to realize they were being offered an impressive counter-weapon to seaborne invasion. It is useless, in retrospect, to attempt a reconstruction of what might have happened off Normandy on D-Day, if the Nazi command had recognized the potentialities of these volunteers and their piloted bomb. Although it is unlikely that the suicidists could have defeated the invasion, the introduction of such an unconventional tactic, if exploited on the scale later used by the Japanese, would certainly have offered another serious threat to an already difficult amphibious operation.

Piloted V-1 provisional sketch.

 
Fieseler Fi-103 Re-4 (V-1 Piloted Flying Bomb).