Sd.Kfz. 8

The '' Sonderkraftfahrzeug'' 8 ("special motorized vehicle 8"), usually abbreviated to Sd.Kfz. 8, was a German half-track designed by Daimler-Benz that saw widespread use in World War II. Its main roles were as a prime mover for heavy towed guns such as the 21 cm Mörser 18, the 17 cm Kanone 18 and the 10.5 cm FlaK 38, however it was also capable of serving as an infantry transport. Approximately 4,000 were produced between 1938 and 1945. It was used in every campaign fought by the Germans in World War II, notably the Invasion of Poland, the Battle of France, the Balkans Campaign, the Eastern Front, the North African Campaign, the Battle of Normandy and the Italian Campaign.

Description

The final version of the ''Sd.Kfz. 8'', the DB 10, was powered by a Maybach 12-cylinder, water-cooled, 8.52-litre (520 cu in) HL85 TUKRM gasoline engine developing at 2,500 rpm. It had a ZF transmission with four forward and one reverse gears in both high and low ratios. It had two fuel tanks, a main one of and a reserve of capacity.Spielberger, p. 164 The driver's seat was mounted on top of the main tank in the cab.

Both tracks and wheels were used for steering. The steering system was set up so that shallow turns used only the wheels, but brakes would be applied to the tracks the farther the steering wheel was turned. The drive sprocket had rollers rather than the more common teeth. The rear suspension consisted of six double roadwheels, overlapping and interleaved in the usual ''Schachtellaufwerk'' system used for German half-track vehicles, mounted on swing arms sprung by torsion bars. The torsion bars were enclosed inside the lateral members of the ladder frame chassis. Track idler wheels were used to control track tension via an adjusting mechanism at the rear of the vehicle. The front wheels had leaf springs and shock absorbers.

The upper body had a crew compartment with three bench seats, one for the driver and his assistant, and two others for the crew. The rear cargo area contained storage compartments, one on each side and two in the rear. The windshield could fold forward and was also removable. A convertible canvas top was mounted above the rear storage compartments. It fastened to the windshield when erected.

The ''Sd.Kfz. 8'' was initially designed to have a towing capacity of , but the wartime ''DB 10'' could tow .Spielberger, p. 85

Design and development

Preliminary design of all the German half-tracks of the early part of the war was done by Dipl.Ing. Ernst Kniepkamp of the "Military Automotive Department" (''Wa Prüf 6'') before the Nazis took power in 1933. His designs were then turned over to commercial firms for development and testing. Daimler-Benz had been working on its own half-track design during 1931–1932, the ''ZD.5''. It weighed , used a twelve-cylinder, Maybach ''DSO 8'' gasoline engine and its upper body had three bench seats behind the driver. Its suspension was based on the World War I-era ''Marienwagen II'' and bore absolutely no relation to the interleaved roadwheels and torsion bars used by the various models of the ''Sd.Kfz. 8''.

Daimler-Benz combined the best of both designs in the ''DB s7'' prototype which appeared in 1934. It used the same engine as the ''ZD.5'', but otherwise bore little resemblance to the older model other than an upper body that had two bench seats for the crew behind the driver's seat. This upper body remained the same over the life of the ''Sd.Kfz. 8''. It weighed and could pull loads of . An improved version was introduced in 1936 as the ''DB s8''.

The heavier () ''DB 9'' model appeared in 1938. It used the Maybach HL85 TUKRM engine, could carry an payload and could tow a load. Daimler-Benz tried unsuccessfully to use their diesel ''OM 48/1'' engine, but it was repeatedly rejected by the ''Army Weapons Office''.

The ''DB 10'' introduced in October 1939 was a refined version of the ''DB 9'' with a new gearbox and transmission: this final version was produced until 1944.

Variants

Ten '' 8.8 cm Flak 18'' anti-aircraft guns were mounted on pedestals on ''DB s8'' and ''DB 9'' chassis in 1939 as the ''8.8 cm Flak 18 (Sfl.) auf Zugkraftwagen 12t (Sd.Kfz. 8)'' — also known as the ''Bunkerflak'' or ''Bufla'' — for anti-tank duties. A gun shield was provided for the 88, but the gun crew had no other protection. The driver's cab was replaced by a lower, armored cupola and the engine compartment was lightly () armored. The vehicle weighed , was long, tall and wide. The gun could fire directly ahead without any problem, but traverse was limited to 151° to each side by the gun shield. Elevation was between -3° and +15°. All ten were assigned to the first company of the anti-tank battalion ''Panzerjäger-Abteilung 8'' which participated in the Invasion of Poland in 1939, the Battle of France in 1940 and Operation Barbarossa in 1941. The company was redesignated as ''Panzerjäger-Kompanie'' ("Anti-Tank Company") 601 in January 1942 and then as the third company of Anti-Tank Battalion 559 the following April. It reported that the last three vehicles had been lost by March 1943.Jentz & Doyle, pp. 28–31

Production and use

Daimler-Benz and Krupp were the main builders of the ''Sd.Kfz. 8'' during the war, with Krauss-Maffei producing 315 in 1940–1941; Škoda joined in the last years of the war making vehicles under the S10 designation.

Total production numbers are: 780 were built from 1934 to 1939; 516 in 1940; 828 in 1941; 840 in 1942; 507 in 1943; and 602 in 1944, for a total of 4070 vehicles of all variants.Hettler, p. 6 1615 were on hand on 20 December 1942. The ''Sd.Kfz. 8'' was used by Czechoslovakia after the war, but it is not known if production continued at Škoda or when they were finally discarded.Spielberger, p. 85 The ''Sd.Kfz. 8'' was also used by Romania during the war.

Unlike most of the other German half-tracks, the ''Sd.Kfz. 8'' was mostly used as a tractor for heavy artillery pieces and was generally not modified for other roles (apart from the few anti-tank conversions mentioned above). The intended towed guns were the 15 cm Kanone 16; the 15 cm Kanone 18; the 10.5 cm FlaK 38, and the 21 cm Mörser 16. It was also capable of towing other artillery pieces such as the Škoda 30.5 cm Mörser, various models of the 8.8 cm Flak, and the 15 cm sFH 18, The heavier guns were usually towed on two limbers, or three in the case of the Škoda 30.5 cn mortar.

Apart from towing artillery, the ''Sd.Kfz'' 8 was also used as recovery vehicle by tank maintenance crews and as a general heavy transport. For example, it was capable of towing a disabled Sd.Kfz. 6/2 in a straight pull and hauling a Panzer 38(t) on a steerable Sd. Ah. 116 tank transporter trailer.

In 1942 five ''Sd.Kfz. 8'' connected together were used to pull a trailer carrying a 30.5 cm gun barrel for Batterie Mirus on Guernsey.News Report transporting barrel and operating gun
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Notes

See also

* List of Sd.Kfz. designations

References

* Chamberlain, Peter, and Hilary L. Doyle. Thomas L. Jentz (Technical Editor). ''Encyclopedia of German Tanks of World War Two: A Complete Illustrated Directory of German Battle Tanks, Armoured Cars, Self-propelled Guns, and Semi-tracked Vehicles, 1933–1945''. London: Arms and Armour Press, 1978 (revised edition 1993).
* Frank, Reinhardt. Don Cox (translator).''German Heavy Half-Tracked Prime Movers 1934–1945''. Atglen, PA: Schiffer, 1996 (first published in German in 1994).
* Granillo, Manuel.
''Legiunea Romana: Romanian General's Handbook''
Lulu Press, 2013
* Hettler, Nicolaus, et al. ''Schwerer Zugkraftwagen 12 to and variants (Daimler-Benz) (Sd.Kfz. 8)''. Nuts & Bolts, Vol. 16. Nuts & Bolts, 2002.
* Jentz, Thomas L., and Hilary L. Doyle. ''Panzerjaeger (3.7 cm Tak to Sfl. Ic): Development and Employment from 1927 to 1941'' Panzer Tracts vol. 7-1. Boyds, MD: Panzer Tracts, 2004.
* Spielberger, Walter J. ''Halftracked Vehicles of the German Army 1909-1945''. Atglen, PA: Schiffer, 2008

External links

Sd.Kfz. 8 on wwiivehicles.com


(in German)

{{Use dmy dates, date=June 2017

World War II half-tracks
Half-tracks of Germany
Military vehicles introduced in the 1930s