09/1/14

Raeder’s heavy ships –December 1942

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Painting depicting the sinking of German destroyer Friedrich Eckoldt by HMS Sheffield at the Battle of Barents Sea

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JW. 51B, left the Highland port of Loch Ewe on 22 December 1942 with fourteen freighters and the usual mixed escort screen and a range of warships offering both close and more distant cover. This was exactly the type of convoy that Raeder’s heavy ships were meant to savage. Lützow (the former pocket battleship – now designated a heavy cruiser) had joined the other heavy cruiser Admiral Hipper at Altenfjorden in the Finnmark region of northern Norway just prior to Christmas. Although Fall Regenbogen (Case Rainbow) was not originally designed with Lützow in mind, it made sense for her to join the operation in a bid to destroy all vestiges of convoy JW. 51B and reinforce the impression that the Germans wished to relay to London, namely, that the Arctic convoys were too costly for the Allies to run even in winter. As a result, the two heavy cruisers left port together at 1745 hours on 30 December accompanied by six destroyers. Under the operational command of Vizeadmiral Oskar Kummetz on board the Admiral Hipper, the plan was hardly the stuff of Yamamoto complexity and ought to have worked far better than it did. Simply put, the Hipper, accompanied by the three destroyers Friedrich Eckholdt, Richard Beitzen and Z29, was to plough on ahead of Kapitän zur See Rudolf Stange in command of the Lützow and his three destroyers Theodor Riedel, Z30 and Z31 during the night to open up a gap between the heavy cruisers of 75-85nm (139-57km) by first light on 31 December. In between the two heavy cruisers the destroyers were to be deployed some 15nm (28 km) apart from one another. This would widen the convoy search area and provide some opportunities for the destroyers to cause some confusion once the convoy had been sighted. In theory at least it was expected that Kummetz, working on information first supplied by German aerial reconnaissance and then subsequently derived from tracking reports from U354, would be the first to intercept the unsuspecting convoy. According to the plan, the Hipper and her destroyers were to engage the Allied destroyer escorts and lure them away from the convoy they were guarding. If this phase went according to plan, it was thought quite reasonably that the unprotected freighters would flee in the opposite direction – in other words to the south and straight into the arms of the Lützow and her destroyers. In this way the Hipper and the northern group of destroyers would eliminate the convoy escorts while the Lützow and her group would fall on the rest of the convoy and reap another PQ. 17 whirlwind. That at least was the theory. In practice the operation turned out to be something quite different. Far from being a belated, but glorious, opportunity to show Hitler that the surface fleet still possessed value and hitting power, Fall Regenbogen was to demonstrate to the Führer just what Raeder’s heavy ships had lost.

In far from ideal conditions with a heavy swell running and sea sickness rampant amongst all the crews of the German vessels, Hipper first glimpsed some elements of an already partly scattered convoy at 0718 hours on New Year’s Eve and sent the destroyer Friedrich Eckholdt to confirm that these ghostly silhouettes were indeed from the convoy. Kummetz now waited for dawn to break but even when it did the visibility was poor and a grey murkiness disguised the ships of both sides. While Kummetz and Stange seemed to be neutralised to some extent by the inclement weather conditions and the latter especially behaved with excessive caution throughout, Captain Robert Sherbrooke in the destroyer Onslow showed tactical acumen and considerable bravery in combating the far superior enemy force pitted against him once he realised that they and not some Russian vessels were in the offing. Sherbrooke only received confirmation that he was about to confront a German force when the Friedrich Eckholdt opened fire on the British destroyer Obdurate from about 8,000 yards (7,315m) at 0929 hours. He wasted little time in signalling the destroyers Obdurate, Obedient and Orwell to join the Onslow and gave orders for the only other destroyer Achates and the remaining vessels of his convoy screen to close with the freighters and lay a smokescreen to try and hide their retreat to the southeast. As Achates began to make smoke so the Hipper hove into view and opened fire on her. Splintered by a near-miss and with her power lines ruptured, the ageing destroyer slowed to 15 knots. At precisely the same time that Kummetz had concentrated his guns upon Achates (0941 hours), Sherbrooke had opened fire on the Hipper from about 9,000 yards (8,229m). Sherbrooke realised he had no chance in an artillery duel with the far heavier weight of shot available to Kummetz’s flagship, but he hoped by steering directly at her and then hauling away he might give the impression that he was firing torpedoes at the heavy cruiser. If his ploy worked, of course, Kummetz would turn away to avoid being hit. Sherbrooke’s only realistic chance was to simulate this type of torpedo attack more than once in a bid to keep the enemy on edge and stall for time until Force R (the light cruisers Jamaica and Sheffield some 50nm [93km] distant) came to his and the other vessels’ rescue. Unfortunately, help was anything from one to four hours away. If the Allied force was to survive for that long and not be crippled in the meantime it would take much initiative, fine shiphandling and raw courage from Sherbrooke and the others captains of his destroyer flotilla. They were up to the task but they needed a slice of luck too and this arrived in the shape of a series of snowy squalls that would temporarily obscure the protagonists from one another. After at least thirty-five minutes of feinting and weaving to good effect and shortly after ordering two of his lightly-armed destroyers (Obdurate and Obedient) to rejoin the convoy to give it added protection, Onslow was finally hit with telling effect by Admiral Hipper at approximately 1016 hours. Holed, on fire, without the use of either her `A’ or `B’ guns and with forty of her crew either dead or wounded, Onslow was in no shape to continue the action. Sherbrooke who had continued to direct operations on the bridge didn’t escape punishment either. Badly injured by flying splinters and having lost the sight of one eye from the flying metal shards, he nonetheless remained at his post, issued orders to lay a smokescreen and only afterwards passed over command to Commander Kinloch on the Obedient before taking his burning vessel out of the line of fire. In putting paid to Onslow (but not sinking her), Kummetz’s gun crews had used 48 x 8-inch (203mm) and 72 x 4.1-inch (104mm) shells to strike her only three times.

Orwell now stood in her path but before Kummetz could do anything on this score, the weather intervened once more blanketing the British destroyer from the sight of the German heavy cruiser. Instead of waiting for the snowstorm to lift, Kummetz decided on a turn to the northeast. This route took him away from the Orwell and the convoy itself now lying some 12nm (22km) distant, but put him on track to meet the minesweeper Bramble. She was quickly rendered into a smoking hulk by a total of 51 x 8-inch (203mm) and 38 x 4.1-inch (104mm) shells that began to rain down on her from shortly after 1036 hours onward. It was no contest, but why Kummetz devoted so much time and attention to destroying Bramble is not clear. She would be finally put out of her misery by the two German destroyers Friedrich Eckholdt and Richard Beitzen, but precious time had been lost in destroying a vessel that posed no real threat to the operation as a whole or to the heavy cruisers in particular. If Kummetz can be faulted for this error, Stange’s entire performance in the Lützow was unsatisfactory. Coming up from the south he and his three destroyers had not sought any action whatsoever. They had crossed the path of the convoy and had reached a point by 1050 hours only 2-3nm (3.7-5.5km) ahead of the freighters. There was nothing in their way and mass slaughter appeared on the cards. Amazingly, Stange failed to respond to this enviable situation. Citing poor visibility, he decided to wait for the weather system to blow itself out and for better conditions to present themselves before taking decisive action. It was an extraordinary blunder. Grossadmiral Raeder would long have cause to regret Stange’s aversion to risk-taking and his appointment to the Lützow.

Even if Stange didn’t recognise the Allied vessels, they had little trouble in determining the Lützow’s identity. Gathering all the British destroyers around the Obedient and displaying none of the restraint of his far more powerful adversary, Kinloch decided that action was called for. Before he could launch any attack, however, the picture became more complicated as Kummetz brought the Hipper back into contention. At 1115 hours she announced her return by opening up once more on the Achates with deadly effect. After pulverising the small destroyer, the German heavy cruiser next turned her attention to the Obedient and quickly straddled her knocking out Kinloch’s wireless as she did so. Command shifted for the second time in a little more than an hour and was passed on this occasion to Lieutenant-Commander Sclater on board the Obdurate. Once again the tactics would be the same – a torpedo feint to force the Admiral Hipper to turn away. It succeeded as before and at 1130 hours the heavy cruiser did just that to comb the tracks of any torpedoes sent her way. Within a minute Force R finally made an appearance and began to make its presence felt as the first shells from the light cruisers Jamaica and Sheffield began to fall around Kummetz’s flagship. Despite frantic manoeuvring, the Hipper was hit by one of Sheffield’s 6-inch (152mm) shells that penetrated her starboard hull beneath her armoured belt some 11 feet (3.35m) below the waterline, causing extensive flooding and knocking out two of her boiler rooms and reducing her power temporarily to 15 knots. Two more shells struck home within the next six minutes: one passing through her hull on the starboard side without exploding and the other detonating inside the aircraft hangar and starting a blazing fire. These were unwelcome and surprising developments, but none were critical and need not have caused the abandonment of the entire operation. After all, neither Jamaica nor Sheffield was actually a match for the two heavy cruisers if they had coordinated their activities better. What Kummetz didn’t know, of course, was whether there were any other Allied ships that would enter the fray and tip the balance of advantage to the other side. He remained very mindful of the advice which Admiral Klüber (Flag Officer, Northern Waters) had given him shortly after he had sailed on the previous evening. `Contrary to operational order regarding contact with the enemy… use caution against enemy of equal strength because it is undesirable for the cruisers to take any great risks.’

Klüber’s original message, coincidentally repeated in condensed form just at this crucial juncture in the battle, would weigh on Kummetz’s mind and dictate his actions subsequently. At 1137 hours he signalled his other ships to break off their action with the Allied vessels and to turn away to the west. As they did so, both the Friedrich Eckholdt and Richard Beitzen unsuspectingly found themselves on a collision course with the two British light cruisers a mere 2nm away (3.7km). Sheffield sank the former in a blaze of gunfire but Jamaica somehow managed to miss the latter. A minute before Sheffield opened up on the German destroyer (1143 hours), Stange at last got Lützow into the act by opening fire on one of the freighters (Calobre) in the convoy. As the British destroyers congregated to meet this latest threat, they laid a dense smokescreen to obscure the emergency turn to the southwest that the convoy made in an effort to put some distance between the freighters and the German surface vessels. It worked. Kummetz reinforced the order to withdraw back towards Altenfjorden at 1149 hours before darkness fell and Stange complied in a rather languid and desultory way that had marked his entire approach to the naval action throughout. As a result, he failed to make further inroads into the convoy and though the Lützow would inflict some splinter damage on Obdurate at midday, the Battle of the Barents Sea was largely over. There might yet have been a successful resolution of the affair for the Germans after midday as Rear-Admiral Burnett in the Sheffield in grey, misty conditions suddenly stumbled upon the two heavy cruisers and Lützow’s destroyers once more at 1223 hours. A lucky man at the best of times, Burnett was once more fortunate as Stange couldn’t recognise Sheffield’s shape or identity in the prevailing gloom. An awkward interlude of six minutes followed in which both ships challenged one another by flashlight, but Burnett brought that episode to an end by firing upon the Lützow and straddling her at 1229 hours from a distance of about 8nm (15km). Stange replied a minute later but the Lützow’s first shells fell short. Shortly afterwards, Kummetz reappeared once more to join in the shelling at 1234 hours. Her gunners were more accurate and Burnett found his ship being straddled almost immediately. It didn’t take him long to decide that this was an unenviable position to be in and at 1236 hours he retired swiftly to the northwest and out of range. Neither Stange nor Kummetz followed and Sheffield and Jamaica were spared destruction as was convoy JW. 51B which had been the objective of Fall Regenbogen in the first place. In this unsatisfactory way, the Battle of the Barents Sea ended for the Germans. It was hardly a ringing endorsement of what the surface fleet could do for their war effort at sea and would scarcely impress the Führer whose patience with Raeder’s heavy ships was wearing intolerably thin by the end of 1942. Once again the line between success and failure was very thin. Fall Regenbogen could have been a classic triumph for the beleaguered surface fleet, but it ended up in exposing it to ridicule and incurring the Führer’s undying contempt.

 

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09/1/14

More Strategic Bombers

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The most dramatic bomber to serve with SAC was the tailless, delta-winged Convair B-58, with a Mach 2 speed and 8,250 km range. Air-to-air refuelling enabled the B-58 to undertake long flights (e.g. from Tokyo to London), loudly advertising its wartime capabilities. The aircraft used a unique system in which a large pod under the fuselage housed both the nuclear weapon and the fuel for the outward flight; it was dropped complete, enabling the aircraft to make a very rapid getaway before returning to base on its internal fuel supply. Although generally successful, the B-58 was very expensive to operate, even by US standards, and was retired after just ten years’ service, without replacement.

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In 1969 US satellites began to return photographs of a new Soviet bomber on the apron at the new aircraft factory at Kazan. This turned out to be a swing-wing version of the Tupolev Tu-22, designated Tu-22M (NATO = ‘Backfire’). Subsequently, a virtually new aircraft with some external similarities to the Tu-22M appeared and was put into production as the Tu-26 (NATO = ‘Backfire-B’). (The relationship between the Tu-22M and the Tu-26 was probably similar to that between the American B-1A and B-1B.)

Three versions of the Tu-26 entered service, one of which carried nuclear weapons for use in the land-attack role. There were, however, repeated arguments between the United States and the Soviet Union over the role of this bomber, with the former stating and the latter denying that it was a strategic bomber. This became a major issue in the SALT II negotiations, and President Brezhnev eventually ordered that the aircraft’s flight-refuelling probes be removed to prove that it did not have the ability to reach the USA, although since these could have been replaced in less than thirty minutes this was only a token gesture. The Tu-26 entered service in the mid-1970s and was produced at the rate agreed under SALT II – thirty per year – with service numbers peaking at about 220.

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Strategic bombers exercised a major influence over the first half of the Cold War, principally because in the 1940s and 1950s they were the only practicable means of delivering the very heavy atomic and hydrogen weapons over intercontinental ranges. Allied to this, bombers had played a major role in the recently concluded Second World War, with the Allied bombing campaigns against Germany and Japan giving the appearance of a war-winning strategy. Indeed, the war had been brought to a close by the two USAAF (United States Army Air Force) B-29 bombers which dropped atomic bombs on Hiroshima and Nagasaki.

There were also bureaucratic reasons for the fierce advocacy of the bomber, however. The US air force finally became independent of the US army in 1947 and was extremely keen to prove itself to be the war-winning arm in the Cold War. In the UK, which found itself facing the reality that it was now only the second most powerful nation in the West, membership of the exclusive ‘nuclear club’ appeared to be the only way to retain superpower status, and, in the short term, bombers were the only feasible way of achieving that. On the Soviet side, the air force realized that it had never produced a bomber force to match those of the USA and UK, and was desperate to rectify this. Thus, from 1945 into the mid-1960s, the strategic bomber armed with nuclear weapons was the symbol of global power.

Atomic warfare was associated with aviation from the very beginning. The first and last nuclear weapons ever used in anger were dropped by U. S. B-29 bombers in August 1945 on the Japanese cities of Hiroshima and Nagasaki. These actions represented the end of World War II (Japan soon surrendered) and the beginning of the Cold War (erstwhile allies aligned against one another). As postwar tensions mounted, the United States clung to its monopoly on atomic weapons as its trump card in any future conflict. In the late 1940s and early 1950s, the U. S. Air Force developed the newly created Strategic Air Command into an elite force of medium- and long-range bombers capable of delivering nuclear weapons to targets throughout the Soviet Union, a strategy of massive retaliation in the event of war with the communist nation. Though the Soviet Union tested its first atomic bomb in 1949-years earlier than expected-the United States remained well ahead in its capacity for nuclear attack throughout the 1950s. In the early 1950s, the superpowers added thermonuclear weapons to their arsenals; some explosive yields were 1,000 times more powerful than early atomic bombs. By the mid-1950s, it had become possible to kill an entire nation in a matter of days. U. S. military planners hoped their nuclear superiority would deter any war, but should it come they continued to believe they could “win” a nuclear exchange by undertaking a massive first strike, thereby preventing Soviet retaliation.

The study of German jet engines helped the Soviets develop their first jet fighters (in 1946, the MiG-9 and Yak-15 were introduced). At the same time, Soviet designers benefited from the wartime acquisition of several U. S. B-29 bombers. The strategic bomber force was reorganized in 1946 within the Soviet Air Force, equipped with Tu-4 heavy bombers (based on the B-29 design) and Il-28 medium bombers.

The progress of the Cold War since the 1960s, the development of nuclear, thermonuclear, and missile weaponry, as well as the development of entirely new technologies, prompted significant changes in the Soviet Air Force. The political and military leadership needed a world-class airpower to back up rising global ambitions and be able to participate in any number of contingencies-nuclear and conventional. At the same time, the greater emphasis on ICBMs in the development of strategic power allowed the Soviets to reduce a number of obsolete aircraft without lowering the combat capability of its air force.

From the 1960 to the 1980s, the Soviets modernized their fleet of strategic bombers and introduced the supersonic Tu-22 bomber (1963). Beginning in 1987, the Tu-160 strategic bomber entered service. This bomber force was an integral (although the smallest) part of the Soviet strategic triad. Additionally, air-to-surface cruise missiles enhanced the strategic function of these aircraft. The cruise missiles, as well as the introduction of the Tu-26 longer-range bomber, in 1974 gave the Soviet Air Force the ability to carry out deep strikes across Western Europe, the North Atlantic, and North America.

STAND-OFF MISSILES

Bomber designers and the tacticians fought an unending war against the potential defenders in an effort to ensure that the bomber would get through to its targets. In the late 1940s the major threat came from radar-directed anti-aircraft guns, which had reached a considerable degree of sophistication, and the bombers’ first response was simply to fly higher than the effective ceiling of the guns. The next threat was air-defence fighters, and here again the bombers responded by flying higher and faster – there were numerous reports of British and US reconnaissance flights over the USSR in the early 1950s in which the Soviet fighters simply could not reach the same altitude as the intruder.

Second World War bombers were fitted with machine-guns in a variety of positions – including the nose, the waist, above and below the fuselage, and the tail – but these were rapidly reduced to just the tail, the elimination of the others saving considerable weight and enabling the aircraft to fly higher and faster. Also in the Second World War, bombers had been escorted by fighters, particularly on the USAAF’s daylight raids; but the strategic ranges now being flown were far in excess of anything a fighter could undertake. So in the 1950s the US air force trialled the idea of the B-36 bomber taking a fighter with it, with the latter being carried on a retractable cradle from which it could be launched in mid-air to deal with enemy fighters, then being recovered for the return to base. A special miniature fighter, the McDonnell XF-85 Goblin, was tested, as was the RF-84K, a modified version of the full-size F-84 Thunderjet fighter, but, although launching proved feasible, recovery did not, and the idea was not pursued.

Electronic countermeasures (ECM) were always used, becoming increasingly sophisticated as time passed. Thus electronic jamming was used to confuse enemy radars, as was ‘chaff’ (strips of metal foil cut to the wavelength of the radar), which was dropped in large quantities, either by the bomber or by specialized escorting aircraft.

One of the earliest devices to help the bomber get through was the US air force’s ADM-20 Quail, which resembled a miniature unmanned aircraft and was dropped over enemy territory, where it flew for some 400 km, using its on-board ECM devices to confuse the enemy as to the strength, direction and probable targets of the incoming bomber force. A maximum of three Quails could be carried by a B-52, and the device was in service from 1962 to 1979.

The main emphasis then turned to stand-off missiles – a concept which, like so many others, had its genesis in Germany, where V-1 missiles had been launched from Heinkel He-111 bombers in 1944–5. The Cold War missiles carried a nuclear warhead and were designed to be launched from the bomber while still outside the range of the enemy air defences. One of the first was the US Hound Dog – a slim missile with small delta wings, and powered by a turbojet – which entered service in 1961. Two Hound Dogs, each with a 1 MT nuclear warhead, were carried beneath the wings of a B-52. The missile could be set to fly at any height between about 50 m and 16,000 m, and had a range at high level of 1,140 km, less at low level. The guidance system was capable of high- or low-level approach, with dog-legs and jinxes to confuse the defence.

Next came the unhappy saga of Skybolt, which was an attempt to use a bomber to launch a ballistic missile, which would have given longer range and, of greater importance, a much shorter flight time. The UK air force joined the project, but the incoming Kennedy administration unilaterally cancelled it in December 1961 – greatly to the indignation of the British, who used the issue as a lever to obtain Polaris missiles and SSBN technology to replace its V-force bombers.

The Short-Range Attack Missile (SRAM), which entered service in 1972, was a rocket-propelled missile with a 170 kT nuclear warhead and a speed of Mach 3. SRAMs could fly either a semi-ballistic, a terrain-following or an ‘under-the-radar’ flight profile, the latter terminating in a pull-up and high-angle dive on to the target. The range depended on the height, and was from 56 km at low level to 170 km at high level. B-52s normally carried twenty SRAMs, while the FB-111A carried six and the B-1B twenty-four.

The Air-Launched Cruise Missile (ALCM) entered service with the US air force in 1982. This weapon had folding wings which extended when it was dropped from the carrier aircraft, and was powered by a small turbojet engine. Designed exclusively for low-level flight, the ALCM used a radar altimeter to maintain height and a map-matching process known as terrain comparison (TerCom) to give very precise navigation. The nuclear-armed version (AGM-96B) had a 200 kT warhead, a CEP of 30 m and a range of some 2,500 km. The AGM-96C was conventionally armed, with a high-explosive warhead, and this version demonstrated its effectiveness and accuracy when thirty-five were launched by B-52s during the Gulf War. B-52s could carry up to twelve and B-1Bs twenty-four.

Soviet stand-off missile development followed a similar pattern and time-scale, although in the early stages of the Cold War the missiles tended to be much larger and less effective than their US counterparts. Indeed, the first missile designed for use by strategic bombers, the AS-3 (NATO = ‘Kangaroo’) remains the largest air-launched missile to go into service, with a length of some 15 m, a wingspan of 9 m and a weight of 11,000 kg; only one could be carried by a Tu-95 (Bear-B). It did, however, have a useful range (650 km) and a high speed (Mach 2), and with an 800 kT warhead it was targeted against large area targets such as cities and ports.

The AS-15 (NATO = ‘Kent’) was much smaller and generally similar in size, performance and role to the US Tomahawk; sixteen could be carried by the Tu-95 Bear-B and twelve by the Tu-160 Blackjack. It carried a 200 kT nuclear warhead and flew at high subsonic speeds over a range of some 3,000 km at a height of 200 m, with an accuracy (CEP) of 150 m.