Pfalz D.III

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Pfalz D.III
Pfalzdiiia.jpg
RoleFighter
Manufacturer Pfalz Flugzeugwerke GmbH
First flightApril 1917
Primary user Luftstreitkräfte
Number builtapproximately 1010

The Pfalz D.III was a fighter aircraft used by the Luftstreitkräfte (Imperial German Air Service) during the First World War. The D.III was the first major original design from Pfalz Flugzeugwerke. Though generally considered inferior to contemporary Albatros and Fokker fighters, the D.III was widely used by the Jagdstaffeln from late 1917 to mid-1918. It continued to serve as a training aircraft until the end of the war.

Contents

Design and development

Pfalz D.III prototype in April 1917 Pfalz.jpg
Pfalz D.III prototype in April 1917
Pfalz D.III (serial 4114/17) of Marine Feld Jasta II Zd3.jpg
Pfalz D.III (serial 4114/17) of Marine Feld Jasta II

Prior to World War I, Pfalz Flugzeugwerke produced Morane-Saulnier monoplane designs under license. [1] These aircraft entered military service as the Pfalz A- and E-series. In September 1916, Pfalz began producing the first of 20 Roland D.I and 200 Roland D.II fighters under license. [2]

In November 1916, Pfalz hired Rudolph Gehringer from Flugzeugbau Friedrichshafen GmbH. [3] As Pfalz's new chief engineer, Gehringer immediately commenced work on an original fighter design. The resulting D.III emerged in April 1917. Like the Rolands, the D.III used a plywood monocoque fuselage. Two layers of thin plywood strips were placed over a mold to form one half of a fuselage shell. [4] The fuselage halves were then glued together, covered with a layer of fabric, and doped. This Wickelrumpf (wrapped body) method was a patented invention of the LFG firm. [5] It gave the fuselage great strength, light weight, and smooth contours compared to conventional construction techniques. [4] However, it also proved to be more labor-intensive and expensive. Furthermore, fuselages of the Wickelrumpf type proved to be liable to twisting or warping in service, affecting performance as well as causing control problems. This has been attributed to moisture absorption in damp front-line conditions [6] or to the use of insufficiently seasoned wood.

The wings were of conventional construction, with a flush Teves und Braun radiator offset to the right side of the upper wing. The ailerons were wooden, rather than the more usual steel tube construction. [7] The horizontal stabilizer had an inverted airfoil section, which facilitated dive recovery and permitted the use of an unbalanced elevator. [7]

Idflieg found the prototype promising. It directed Pfalz to halt production of the Roland D.III and to complete the balance of the contract, 70 aircraft, to the new design. [3] After a Typenprüfung (type test) at Adlershof in May, the Idflieg ordered various modifications, including an enlarged rudder and horn-balanced ailerons. [8] In June 1917, Pfalz received a second order for 300 aircraft. [8]

Operational history

Pfalz D.IIIa (serial 8143/17) flown by Oberleutnant Walter Ewers of Jasta 77b. The aircraft displays hastily applied Balkenkreuz markings PfalzD.jpg
Pfalz D.IIIa (serial 8143/17) flown by Oberleutnant Walter Ewers of Jasta 77b. The aircraft displays hastily applied Balkenkreuz markings

Deliveries to operational units began in August 1917. Jasta 10 was the first recipient of the new aircraft, followed by Jasta 4. While markedly better than the earlier Roland designs, the D.III was generally considered inferior to the Albatros D.III and D.V. German pilots variously criticized the Pfalz's heavy controls, low speed, lack of power, or low rate of climb compared to the Albatros. [6] [9] [10] The D.III slipped in turns, leading to crashes when unwary pilots turned at very low altitudes. [6] [11] Moreover, the Pfalz stalled sharply and spun readily. Recovery from the resulting flat spin was difficult, though some pilots took advantage of this trait to descend quickly or evade enemy aircraft. [12]

The Pfalz's primary advantage was its strength and sturdiness. The Albatros scouts were plagued by failure of their single-spar lower wings. [13] The Pfalz, however, could safely dive at high speeds due to its twin-spar lower wing. [3] [14] For this reason, the Pfalz was well-suited to diving attacks on observation balloons, which were usually heavily defended by anti-aircraft guns trained to the balloon's altitude. [15]

D.IIIa

The most pressing complaint about the new Pfalz was that the guns were buried in the fuselage, preventing pilots from clearing gun jams in flight. [4] This feature had been carried over from the earlier Roland designs. [8] In November 1917, Pfalz responded by producing the slightly modified D.IIIa, which relocated the guns to the upper fuselage decking. [4] The D.IIIa was distinguishable by its enlarged semicircular horizontal stabilizer and cropped lower wingtips. [4] It also featured a more powerful version of the Mercedes D.III engine.

Pfalz built approximately 260 D.III and 750 D.IIIa aircraft. [8] Most were delivered to Bavarian Jastas. [16] Once Pfalz completed the final batch in May 1918, [17] production shifted to the D.IIIa's successor, the D.XII. Some aircraft from the final D.IIIa batch were delivered to Turkey. [17]

As of 30 April 1918, 433 D.IIIa scouts were still in frontline use. [18] By 31 August, that number had declined to 166. [18] Many serviceable aircraft were sent to advanced training schools, but approximately 100 aircraft remained in frontline use at the time of the Armistice.

Operators

Flag of the German Empire.svg  German Empire
Flag of the Ottoman Empire.svg  Ottoman Empire

Replica aircraft

Replica Pfalz D.III (ZK-FLZ) at the Classic Fighters 2015 airshow in Blenheim, New Zealand CF15 Pfalz D.III ZK-FLZ 050415 02.jpg
Replica Pfalz D.III (ZK-FLZ) at the Classic Fighters 2015 airshow in Blenheim, New Zealand

Today, there are no known surviving D.III airframes. However, two flying replicas were built for the 1966 film The Blue Max . One replica was built from scratch, while a second was converted from a de Havilland Tiger Moth airframe. Both replicas are currently based in New Zealand. A third flying replica was built by Ron Kitchen of Nevada in 1987 but is now on static display at the Cavanaugh Flight Museum in Addison, Texas.

Another, static replica was built by the modern Pfalz company in 2005 and is on display at the Auto und Technik Museum in Speyer.

Specifications (D.IIIa)

Pfalz D.III Baubeschreibung drawing Pfalz D.III dwg.jpg
Pfalz D.III Baubeschreibung drawing

Data from German Aircraft of the First World War [19]

General characteristics

Performance

Armament

See also

Related lists

Related Research Articles

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References

Notes

  1. Herris 2001, p. 10.
  2. Herris 2001, pp. 27–28.
  3. 1 2 3 VanWyngarden 2006, p. 18.
  4. 1 2 3 4 5 Herris 2001, p. 30.
  5. Wagner 1971, pp. 75-76.
  6. 1 2 3 Herris 2001, pp. 61–62.
  7. 1 2 Gray and Thetford 1962, p. 188.
  8. 1 2 3 4 VanWyngarden 2006, p. 19.
  9. Gray and Thetford 1962, p. 189.
  10. VanWyngarden 2006, pp. 50, 62.
  11. VanWyngarden 2006, p. 77.
  12. VanWyngarden 2006, pp. 45–46.
  13. Herris 2001, p. 29.
  14. Guttman 2005, p. 9.
  15. Guttman 2005, pp. 7–9.
  16. VanWyngarden 2006, p. 45.
  17. 1 2 Grosz 1995, p. 2.
  18. 1 2 Herris 2001, p. 154.
  19. Gray and Thetford 1962, p. 190.

Bibliography