Pfalz D.III

infobox Aircraft
name = Pfalz D.III
type = Fighter
manufacturer = Pfalz Flugzeugwerke GmbH

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caption =
designer =
first flight = April 1917
introduced =
retired =
status =
primary user = "Luftstreitkräfte"
more users =
produced =
number built = approximately 1010
unit cost =
variants with their own articles =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 scouts, the D.III was widely used by German fighter units from the fall of 1917 through the summer of 1918. It continued to serve as a training aircraft until the end of the war.

Design and development

Prior to World War I, Pfalz Flugzeugwerke produced Morane-Saulnier monoplane designs under license. 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.

In November 1916, Pfalz hired Rudolph Gehringer from Flugzeugbau Friedrichshafen GmbH. 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 veneer strips were spirally wrapped in opposing directions over a mold to form one half of a fuselage shell. The fuselage halves were then glued together, covered with a layer of fabric, and doped. This "Wickelrumpf" method gave the fuselage great strength, light weight, and smooth contours compared to conventional construction techniques. However, it also proved to be more labor intensive and expensive. Furthermore, the D.III fuselage was prone to twisting or warping from side to side as it aged, a defect variously attributed to the use of insufficiently seasoned wood or to moisture absorption in damp conditions.

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

The "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. After a "Typenprüfung" (type-test) at Adlershof in May, the "Idflieg" ordered modifications to the rudder and ailerons. In June 1917, Pfalz received a second order for 300 aircraft.

Operational history

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, lack of speed, lack of power, or lack of climb compared to the Albatros. The Pfalz stalled sharply and spun readily. Recovery from the resulting flat spin was difficult. The D.III also slipped in turns, leading to crashes when unwary pilots turned at very low altitudes. Accounts of Allied pilots similarly showed that they did not hold the Pfalz in high regard.

The Pfalz’s primary advantage was its strength and sturdiness. The Albatros scouts were plagued by failure of their single-spar lower wings. The Pfalz, however, could safely dive at high speeds due to its twin-spar lower wing. 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.

D.IIIa

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

Pfalz built approximately 260 D.III and 750 D.IIIa aircraft. Most were delivered to Bavarian "Jastas". Once Pfalz completed the final batch in April 1918, production shifted to the D.IIIa's successor, the D.XII. As of June 1918, about 430 D.IIIa scouts were still in service. By August, that number had declined to 166, and most examples had been withdrawn from frontline units.

Operators

;flag|German Empire
*"Luftstreitkräfte"

Replica aircraft

Today, there are no known surviving D.III airframes, but several flying replicas exist. Two de Havilland Tiger Moths were heavily modified to represent D.IIIs in the film "The Blue Max". These replicas are currently based in New Zealand.

pecifications (D.IIIa)

aircraft specification

plane or copter?=plane
jet or prop?=prop
crew=One
length main=22 ft 9 in
length alt=6.95 m
span main=30 ft 10 in
span alt=9.40 m
height main=8 ft 9 in
height alt=2.67 m
area main=238.6 ft²
area alt=22.17 m²
empty weight main=
empty weight alt=
loaded weight main=
loaded weight alt=
max takeoff weight main=2,061 lb
max takeoff weight alt=935 kg
engine (prop)=Mercedes D.IIIaü
type of prop=
number of props=1
power main=180 hp
power alt=119 kW
max speed main=115 mph (185 km/h) at sea level; 102.5 mph at 9,842 feet; 91.5 mph at 15,000 feet
max speed alt=
range main=
range alt=
ceiling main=17,060 ft
ceiling alt= 5,200 m
climb rate main=
climb rate alt=33 minutes to 15,000 feet
loading main=
loading alt=
power/mass main=
power/mass alt=
armament=
*2x 7.92 mm LMG 08/15 "Spandau" machine guns

ee also

aircontent
related=

similar aircraft=

lists=
* List of military aircraft of Germany
* List of fighter aircraft
see also=

References

* Herris, Jack. "Pfalz Aircraft of World War I (Great War Aircraft in Profile, Volume 4)". Boulder, Colorado: Flying Machine Press, 2001. ISBN 1-891268-15-5.