The Model 34 half-track was the Polish derivate of a 2,5t truck Polski
FIAT 621, which was produced by the Italian licence. The halftrack
variant was designed in 1934 by the Armoured Forces Technical Research
Bureau in Warsaw. The design utilised some truck components, some of
them were strengthened or modified. A prototype series was built in
1935, a series production started in 1936 in PZInz. (Panstwowe Zaklady
Inzynieryjne - State Engineering Works). Until 1939 about 400 halftrack
cars were completed in all versions. At least 80 of them were artillery
tractors C4P.
The body of Model 34 half-track was mixed wooden-steel construction,
seated upon a rectangular frame. The front axle was sprung on
semi-elliptic leaf springs with shock absorbers. The rear suspension
consisted of an axle suspended on semi-elliptic leaf springs, with a
rocker-arm on it (earlier and later vehicles were differing a bit in the
rocker-arm shape). The two-wheel bogey and the idler were suspended on a
rocker-arm. The idler wheel was also the last road wheel. The drive
sprocket was in the front. One return wheel was fixed to the rocker-arm.
The tracks were pin less, rubber and steel, quite modern design. The
track width was 0.3 m (11.8 in).
Technical data :
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Engine: Fiat-122B (PZInż. 367); 4-stroke, 6-cyl. inline,
2952 ccm, 46 HP per 2600 rpm, water-cooled. Gearbox: 4 forward gears, 1
reverse gear, with a reducer.
A more powerful 63 HP engine variant was worked in 1936, but the production started just in 1939. It isn't known, if any vehicles were fitted with that better engine, apart from 5 tractors fitted with prototype-series engines.
A more powerful 63 HP engine variant was worked in 1936, but the production started just in 1939. It isn't known, if any vehicles were fitted with that better engine, apart from 5 tractors fitted with prototype-series engines.
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Frame length 5250 mm (206,7 in), width 1900 mm (75
in), track of wheels 1470 mm (58,3 in), tracks centers
1480 mm (58,3 in), track width 300 mm (11,8 in).
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Weight about 3000 kg.
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Max. road speed 30-35 km/h (up to 22 mph), range up to
250 km.
- Max. steepness 20 %, wading depth 0,5 m ( 20 in),
trench crossing 1m (39 in)
-
Fuel consumption 60 litres /100 km (120 - off road).
Painting :
The painting was a standard camouflage pattern of three colours:
greyish-sand and dark brown (sepia) over brown-green, or brown-green
only. Ambulances were painted in brown-green, with big red cross signs
over white circles.
Picture from book ,,Pojazdy Wojska Polskiego 1939,, A.Jońca, R.
Szubański, J. Tarczyński
Instruction of model E019 A Model 34 half-track