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Wednesday, August 3, 2011

FOCKE WULF TA-152 & TA-153 (FASTEST PROPELLER DRIVEN WORLD WAR II)

Focke-Wulf Ta 152

The Focke-Wulf Ta 152 was a World War II German high-altitude fighter-interceptor. The Ta 152 was a development of the Focke-Wulf Fw 190 aircraft, but the prefix was changed from "Fw" to "Ta" to recognize the contributions of Kurt Tank who headed the design team. The number 152 was chosen in the German air ministry's list of numbers allocated to German aircraft companies, and was not related to the designer's previous projects or achievements. It was intended to be made in at least three versions—the Ta 152H Höhenjäger ("high-altitude fighter"), the Ta 152C designed for slightly lower-altitude operations and ground-attack using a different engine and smaller wing, and the Ta 152E fighter-reconnaissance aircraft with the engine of the H model and the wing of the C model.

The first Ta 152H entered service with the Luftwaffe in January 1945. While total production—including prototypes and pre-production aircraft—has been incorrectly estimated in one source at approximately 220 units,[2] only some 43 production aircraft were ever delivered before the end of the European conflict.[1] These were too few to allow the Ta 152 to make a significant impact on the air war.

Design and development

Due to the difficulties German interceptors were having when battling American B-17s, and in light of rumors of new B-29 bombers with better capabilities, the Reichsluftfahrtministerium (German Air Ministry, or "RLM") requested proposals from both Focke-Wulf and Messerschmitt for a high-altitude interceptor. Messerschmitt answered with the Bf 109H, and Focke-Wulf with the Fw 190 Raffat-1, or Ra-1, (fighter), Ra-2 (high-altitude fighter) and Ra-3 (ground-attack aircraft), which developed into the Fw 190 V20 (Ta 152A), V30 (Ta 152H) and V21 (Ta 152B) prototypes, all based on the then successful Fw 190 D-9 but with varying degrees of improvement. The V20 used the same Jumo 213E engine as the Fw 190 D-9, while the V21 used the DB 603E. Neither of these offered any significant improvement over the Fw 190 D-9, and so further development of the Ta 152A and B was cancelled. The V21 airframe, however, was further modified as the V21/U1 and became the prototype for the Ta 152C.[3][page needed]

Kurt Tank originally designed the Ta 152 using the Daimler-Benz DB 603 engine as it offered better high-altitude performance and also a greater developmental potential. The DB 603 had been used in the Fw 190C with many problems and was considered too difficult to implement in the Ta 152 by RLM officials. With this in mind, Tank focused his efforts on the Junkers Jumo 213E as the Ta 152H's power plant. However, he insisted that the Daimler-Benz DB 603 remained for the Ta 152C versions and as an option for later versions of the Ta 152H.

The Ta 152's fuselage was an extended version of the Fw 190 D-9 fuselage with larger tail surfaces, and hydraulic rather than electrically-controlled undercarriage and flaps. Due to the changes in the center of gravity and overall balance, the nose was also lengthened.[4][page needed] Wingspan was changed from the Fw 190's 10.51 m (34 ft 5 in) for both versions. The H had a span of 14.44 m (48 ft 6 in) and the C a wingspan of 11.00 m (36 ft 1 in).

The Ta 152 also featured the FuG 16ZY and FuG 25a radio equipment[4][page needed](some aircraft were issued with FuG 125 Hermine D/F for navigation and blind landing, LGW-Siemens K 23 autopilot, and a heated armorglass windscreen for bad-weather operations).

Fuel capacity was 595 L (157 US gal) for the H-0 model, with the option of a 300 L (80 US gal) drop tank on the centerline.[citation needed] The H-1 model carried an additional 454 L (120 US gal) of fuel in six unprotected bag tanks in the wings; typically, one of these tanks was used to hold the MW 50 methanol-water mixture and another for GM-1 nitrous oxide. The H-1 could also carry a 300 L (80 US gal) underbelly drop tank.[citation needed]

Design for high-altitude performance

To reach higher altitudes, a pressurized cockpit was added to the H models. The canopy was sealed via a circular tube filled with rubber foam which was inflated by a compressed air bottle, while the engine compartment was also sealed from the cockpit with a rubber foam ring. A Knorr 300/10 air compressor provided the pressure, maintaining the cockpit at .36 atmospheres (5.29 psi) above 8,000 m (26,250 ft). To prevent fogging, the windscreen was of a double-pane style with a 6 mm (.32 in) thick outer pane and a 3 mm (.118 in) inner pane with a 6 mm (.24 in) gap. The gap was fitted with several silica gel capsules to absorb any moisture forming between the panes.[4][page needed]

The aircraft had an increased wingspan compared to the previous Fw 190 design, as a further accommodation towards better high-altitude performance. Due to the war's impact on aluminum availability, the wing was built around two steel spars, the front extending from just past the landing gear attachment points, and the rear spar spanning the entire wing. The wing itself was designed with 3° of washout, from the root to the flap-aileron junction, to prevent the ailerons from stalling before the center section of the wing. This design allowed the pilot to maintain roll control during a stall and extreme flight envelope manoeuvres.[citation needed]

The Ta 152H boasted excellent high-altitude performance, using a Jumo 213E engine (a high-altitude version of the Jumo 213A/C used in the Fw 190D), a two-stage, three-speed supercharger and the MW 50 methanol-water mixture engine boost system.[citation needed]

Armament

The H-model had heavy armament to allow it to deal quickly with enemy aircraft. It had three weapons firing through the propeller arc: one 30 mm (1.18 in) MK 108 Motorkanone cannon centered within the propeller hub and two 20 mm MG 151/20 cannons located in the wing roots.[4][page needed] The C-model was designed to operate at lower altitudes than the H-model, and had even heavier armament consisting of one 30 mm (1.18 in) MK 108 firing through the propeller hub, and four 20 mm MG 151/20s. Two of the 20 mm guns were mounted above and aft of the engine (in the forward upper fuselage decking), and the other two in the wing roots. The cockpit was not pressurized in the C models.[3][page needed] The Ta 152C could destroy the heaviest enemy bombers with a short burst but the added weight decreased speed and rate of turn.

Performance

The Ta 152 H-1, with the Jumo 213 E engine, was among the fastest piston-engined fighters of the war, capable of speeds up to 755 km/h (472 mph) at 13,500 m (41,000 ft, using the GM-1 boost) and 560 km/h (350 mph) at sea level (using the MW 50 boost).[5] To help it attain this speed, it used the MW 50 system mainly for lower altitudes (up to about 10,000 m/32,800 ft) and the GM-1 system for higher altitudes, although both systems could be engaged at the same time. The Ta 152 was one of the first aircraft specifically designed to employ a nitrous oxide power boost system.[citation needed]

In late 1944, Kurt Tank reported that while flying an unarmed Ta 152H to a meeting at the Focke-Wulf plant in Cottbus, he saw two P-51 Mustangs. He made his escape by engaging the MW 50 boost, opening the throttle wide to gain maximum speed to escape the enemy fighters, and left the two Mustangs behind him.[6] There is no evidence from Allied reports that these P-51s ever saw him.[citation needed]

Japanese version

In April 1945, the JAAF had acquired the license, schemes and technical drawings for manufacturing the Ta 152 in Japan.[7][verification needed] During the last stages of the conflict in Germany, with the plight of the Japanese armed forces growing ever bleaker, a very large influx of the latest aviation technology Germany had to offer was given to or bought by the Japanese air force in the hopes that it would stem the tide of defeats and ever increasing pressure by the superior aircraft the Allies were putting into the field.

Operational history

By fall 1944, the war was going badly for Germany, and the RLM pushed Focke-Wulf to quickly get the Ta 152 into production. As a result, several Ta 152 prototypes crashed early into the test program. It was found that critical systems were lacking sufficient quality control. Problems arose with superchargers, pressurized cockpits leaked, the engine cooling system was unreliable at best due in part to unreliable oil temperature monitoring, and in several instances the landing gear failed to properly retract. A total of up to 20 pre-production Ta 152 H-0s were delivered from November 1944 to Erprobungskommando Ta 152 to service test the airplane. It was reported that test pilots were able to conduct a mere 31 hours of flight tests before full production started. By the end of January 1945, only 50 hours or so had been completed. The Ta 152 was not afforded the time to work out all the little quirks and errors plaguing all new designs. These problems proved impossible to rectify given the situation in Germany towards the end of the war, and only two Ta 152C remained operational when Germany surrendered.[citation needed]

III./Jagdgeschwader 301, initially a Luftwaffe Wilde Sau unit, was ordered to convert to the type in January 1945, which it did (and flew them operationally for a short time). In the end, available Ta 152s were pooled in a special Stabstaffel JG 301, first based at Alteno, then at Neustadt-Glewe in Mecklenburg.[citation needed]

The Stabstaffel never had more than 15 Ta 152Hs available, both H-0s and H-1s. Since the usual transfer system had broken down, pilots had to look for additional 152s themselves.[citation needed]

An early Ta 152 combat occurred on 14 April 1945 when Oberfeldwebel Willi Reschke tried to intercept a De Havilland Mosquito over Stendal, but failed to catch up due to engine trouble.[8][page needed]

On the evening of that same day, Reschke was to demonstrate that the Ta 152H could be used as a low-altitude fighter. A section of four Hawker Tempest Vs of 486(NZ) Squadron were out on patrol. After attacking a train near Ludwigslust, the section split up into pairs; Wing Commander Brooker ordered the Tempests flown by Flying Officer S.J. Short and Warrant Officer Owen J. Mitchell to make their own way back to base. On the way back, this pair, which was strafing targets along the railway tracks near Ludwigslust, was spotted by lookouts posted at Neustadt-Glewe. Three Ta 152s—flown by Reschke, Oberstleutnant Aufhammer and Oberfeldwebel Sattler—were scrambled, catching the Tempests by surprise. Reschke declared:

    We reached the position at an altitude of 200 metres, just at the moment when both Tempests after diving started climbing again. Just as the dogfight was developing Sepp Stattler, on our side, was hit and his plane fell like a stone out of the sky [...] The Tempest which I attacked quickly reached the same height as me and was [at] approximately 10 o'clock before me. The dogfight began between 50 and 100 metres above ground level and very often the wing tips passed close over the treetops.[...] The whole fight was executed in a left-hand turn, the low altitude of which would not allow for any mistakes. Ever so gradually I gained metre by metre on the Tempest and after a few circles I had reached the most favourable shooting position. [...] I pressed my machine gun buttons[9] for the first time [...] I could see the Tempest for a short moment in straight ahead flight displaying slightly erratic flying behaviour. But immediately she went straight back into the left turn. [...] I sighted the Tempest very favourably in my cross-hairs and could not have missed but my machine-guns experienced feeding problems. I therefore tried to shoot it down with my cannon and forced her into a tight left-hand turn from where she tipped out over her right wing and crashed into a forest.

Mitchell (a rookie with just a month and half of experience on the front-line[10]) was flying the Tempest and was killed on impact with the ground.[11] It is thought that Stattler had been shot down by either Short or Bill Shaw of 486 Sqn, who claimed a Bf 109 in the same area (the Ta 152s were mistaken for 109s).[12][13] [14]

Operational missions were flown in April 1945 from Neustadt, mostly escorting close support aircraft to the Battle of Berlin.

On 24 April, Reschke claimed two Yakovlev Yak-9s near Berlin. It seems that three often reported victory claims by Obfw. Walter Loos, on 24, 25 and 30 April [15][verification needed]), cannot be attributed to Ta 152 (Loos himself denied that, stating that he never shot down a single enemy fighter while flying the Ta 152 [16][verification needed]).

At the end of the war the Ta 152 score was likely seven victories and four losses in air combat (a little degree of uncertainty about those numbers does exist).

Four victories were achieved by Josef Keil, from 1 March 1945 to 21 April 1945.[17] The statement that he had five victories on Ta 152 is unsubstantiated and is shown to be false by matching score table and dates. The Ta 152 was delivered to JG 301 on 27 February 1945 and the first Ta 152 combat action against American bombers happened on 2 March 1945,[18] so his victory against a B-17 on 20 February 1945 couldn't have been achieved flying that type of fighter. Alternatively, this results from an incorrect reading of published sources such as Lowe [19] because JG 301 had the Ta 152 in service from late January 1945, and individual missions such as Keil's could well have been flown.

At least three victories were achieved by Willi Reschke.[20]

The four losses in air combat were: Hptm. Hermann Stahl, KIA on 11 April 1945; Obfw. Sepp Sattler, KIA on 14 April 1945; two unknown JG11 pilots, downed by Spitfires in the last days of April 1945 during transfer from Neustadt-Glewe to Leck airfield.[21]

The total Ta 152 production is not well known but 43 are identified,[1] (H-0 and H-1) with c.6 prototypes.

Variants

Ta 152 C-0
    Small wing, pre-production aircraft, 1 prototype built[4][page needed] powered with 2,100-hp (1566 kW) Daimler Benz DB603LA engine. The extra length of this engine required a compensating rear fuselage plug and enlarged tail surfaces, and wing span was increased to 36 ft 1 in (11 meters).[2]
Ta 152 C-1
    Small wing, armed with one engine-mounted Motorkanone 30 mm (1.18 in) MK 108 cannon and four 20 mm MG 151/20 cannons (two above the engine, two in the wing roots).
Ta 152 C-2
    Small wing, equipped with an improved radio.
Ta 152 C-3
    Small wing, armed with one engine-mounted Motorkanone 30 mm (1.18 in) MK 103 cannon and four 20 mm MG 151/20 cannons (two above the engine, two in the wing roots).
Ta 152 E-1
    Photographic reconnaissance version of the Ta 152C, with standard wing.[2]
Ta 152 E-2
    High-altitude version, powered by a Junkers Jumo 213E engine and with the H-series wing. But only a single prototype was completed.[2]
Ta 152 H-0
    Long wing, 20 pre-production aircraft.[3][page needed]
Ta 152 H-1
    The only production version.[2] Long wing, armed with one engine-mounted Motorkanone 30 mm (1.18 in) MK108 cannon and two 20 mm MG 151/20 cannons in the wing roots, additional fuel tanks located in the wings.

The sole survivor

There is only one surviving example of the Ta 152: a 152 H-0 variant flown by III./Jagdgeschwader 301, a Luftwaffe Wilde Sau unit. The aircraft is currently housed at the National Air and Space Museum Paul E. Garber Preservation, Restoration, and Storage Facility in Suitland, Md., where it is awaiting restoration.[22] The exact history of the aircraft is unknown, but the NASM reports:

"Definitive information about the NASM Ta 152 has always been lacking but research conducted late in 1998 may have revealed the airplane's true identity as Werk-Nummer (serial number) 150020, not 150003 or '010 as widely reported. This places the airframe toward the end of the range of pre-production H-0 models, a variant marking the transition from the Ta 152 prototypes to full production Ta 152 H-1 airplanes. It was probably built at Focke-Wulf's production facility at Cottbus, Germany, in December 1944, and delivered to Erprobungskommando Ta 152 at Rechlin, Germany, for service testing."[23]

Operators

Nazi Germany

    Luftwaffe

Specifications (Ta 152 H-1)

General characteristics

    Crew: One
    Length: 10.82 m (33 ft 11 in)
    Wingspan: 14.44 m (48 ft 6 in)
    Height: 3,36 m (13 ft 1in)
    Wing area: 23.5 m² (253 ft²)
    Empty weight: 4,031 kg (8,640 lb)
    Loaded weight: 4,625 kg (10,470 lb)
    Max takeoff weight: 5,217 kg (11,501 lbs)
    Powerplant: 1 × Jumo 213E liquid-cooled inverted V-12, 1,287 kW (1,750 PS; 2,050 PS with MW-50)

Performance

    Maximum speed: 759 km/h at 12,500 m using GM-1 boost (472 mph at 41,000 ft using GM-1 boost)
    Range: 2,000 km (1,240 mi)
    Service ceiling: 14,800 m using GM-1 boost (48,550 ft using GM-1 boost)
    Rate of climb: 19.2 m/s using MW-50 (3,445 ft/min)
    Wing loading: 196.8 kg/m² (41.38 lb/ft²)
    Power/mass: 0.276 kW/kg (0.167 hp/lb)

Armament

    1 × 30 mm MK 108 cannon
    2 × 20 mm MG 151/20 cannons


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Focke Wulf TA-153

The Focke-Wulf Ta 153 (GH+KV) was a prototype German fighter aircraft built during World War II. It was a development of the Ta 152 with long-span, high-aspect ratio wings. The prototype never flew because the German factory it was being built in was overrun.


Design and development

The Fw 190 Ra-4D proposal was submitted to meet the requirements of the second phase of the 1942 Hochleistungsjäger (High-Performance Fighter) programme, and was envisioned to have both long- and short-span versions, similar to the later Ta 152 series. The Fw 190 V32 (a Fw 190C-series prototype) was reconstructed as a test-bed for certain Ta 153 features, retaining the DB 603G engine with oil cooler bath. Other DB 603 deriatives (DB 622, DB 623, DB 627) with superchargers or turbo-superchargers were considered as possible powerplants. The development of the Ta 153 was eventually abandoned due to the refusal of the General-Luftzeugmeister Amt to allow disruption of existing production lines, and the wing was applied to the Ta 152C-series. Contrary to widespread belief, the long-span wing was never mounted on the Ta 153; its success on the Ta 152H-series, however, coupled with the more powerful Daimler-Benz engines and proposed heavy armament could possibly have made the Ta 153 a far more potent dogfighter than even the Ta 152C-series.


Specifications (Ta 153)

General characteristics

* Crew: one, pilot
* Length: 10.40 m (34 ft 1 in)
* Wingspan: 11.00 m (36 ft 1 in)
* Height: 3.40 m (11 ft 2 in)
* Wing area: 18.2 m² (196 ft²)
* Empty weight: 3,600 kg (7,937 lb)
* Loaded weight: 4,400 kg (9,700 lb)
* Max takeoff weight: 5,100 kg (11,244 lb)
* Powerplant: 1× Junkers Jumo 213, 1,305 kW (1,750 hp)

Performance

* Maximum speed: 680 km/h (424 mph)
* Range: 1,400 km (873 mi)
* Service ceiling: 11,000 m (36,080 ft)
* Wing loading: 242 kg/m² (50 lb/ft²)
* Power/mass: 0.30 kW/kg (0.18 hp/lb)

Armament

* 1 × 30 mm (1.18 in) MK 108 cannon with 90 rounds
* 2 × 20 mm MG 151 cannons with 175 rpg

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