Tag Archive for 'observation'

m. gp. Beob. Kw. (Sd. Kfz. 254): 4-Wheeled/Tracked Armored Observation Vehicle

Saurer m. gp. Beob. Kw. (Sd. Kfz. 254): 4-Wheeled / Tracked Armored Observation Vehicle

The four-wheeled, tracked armored observation vehicle is designed to run on either wheels or tracks. Four pneumatic-tired wheels are mounted on the outside of the tracks. These may be lowered when the vehicle is stopped, by power take-off from the transmission, thus raising the tracks from the ground. It is operated by a crew of five.

The superstructure is constructed of sloping, welded plate ranging from 10 to 15 mm in thickness. The hull is roomy due to the absence of a basket and turret. The driver’s entrance is located forward in the right side of the hull. There are two double doors at the rear and two hatches, with double-hinged flaps, on the roof. A railing type of aerial for W/T is fitted round the top of the superstructure.

The track suspension, used for difficult terrain, consists of six small hollow steel bogie wheels on each side mounted on four hull stub axles. The front and rear bogie wheels are mounted singly and each is sprung by a coil spring. The remaining four are in articulated pairs sprung by coil springs. There are also a front drive sprocket, rear idler, and four hollow steel return rollers. A girder connects the first three hull stub axles on the outside of the suspension assembly.

The alternate suspension, used for normal terrain and hard roads, consists of four pneumatic-tired wheels sprung on torsion bars with a wheel base of 7 feet, 10 inches.

The vehicle is powered by a 4-cylinder, water-cooled Diesel engine rated at 70 horsepower. The power train is comprised of a single-plate, multiple-spring type clutch incorporated in the flywheel, a synchromesh transmission with five speeds forward and one reverse, controlled differential, and final drive reduction gears to the sprockets.


Weight         7 tons
Length 14 ft., 10 1/2 ins.
Width 7 ft., 4 1/2 ins.
Height (on tracks) 7 ft., 3 ins.
Height (on wheels) 7 ft., 7 ins.
Ground clearance 12 ins. (on tracks)
Tread centers 4 ft., 3 ins.
Ground contact 7 ft., 9 ins.
Width of track 9 1/2 ins.
Size tires 8.25 x 20
Wheel base 7 ft., 10 1/2 ins.
Fording depth 3 ft. (on wheels)
Theoretical radius of action
     Roads 310 miles (on wheels)
     Cross-country 62 miles (on tracks)
     Roads Unknown
     Cross-country Unknown
     Front plate 15 mm
     Sides 10 mm
Armament L.M.G.
Engine Diesel, 4 cyl., 70 hp.
Transmission Synchromesh—5 speeds forward, 1 reverse
Tracks Controlled differential
Wheels Normal steering wheel
Crew 5

German: p. 48

l. gp. Beob. Kw. (Sd. Kfz. 253): Light Armored Reconnaissance Car

l. gp. Beob. Kw. (Sd. Kfz. 253): Light Armored Reconnaissance Car -- SdKfz 253 leichter Gepanzerter Beobachtungskraftwagen

This vehicle is an armored version of the l. Zg. Kw. 1 ton (Sd. Kfz. 10) used for reconnaissance purposes. In appearance it closely resembles the light armored personnel carrier (Sd. Kfz. 250). There are a number of minor differences in the suspension of the armored versions as compared with the Sd. Kfz. 10, the principal one being one less bogie wheel.

The mechanical components of the chassis are the same as those utilized in the Sd. Kfz. 10, therefore the road performance of the two vehicles is similar.

The net weight of the vehicle ready to drive is 11,022 pounds; the combat weight 12,540 pounds. The weight on the front axle is 2,552 pounds; the weight on the tracks 9,988 pounds.

Its maximum highway range is 198 miles on a fuel tank capacity of 35 gallons. The crew consists of four, including the driver.

This vehicle, like all semitracks, is equipped with a power cable winch having a lifting power of 5,500 pounds. The turning radius measures 35 feet.


Weight         5.5 tons
Length 15 ft., 5 ins.
Width 6 ft., 4 ins.
Height 5 ft., 11 ins.
Ground clearance 11 ins.
Tread centers (Wheel, 64 ins.), (Track, 62 ins.)
Ground contact 3 ft., 11 ins.
Width of track 9.4 ins. (Wheel, 7.5 ins.)
Track links 38
Pitch of track 6 5/16 ins.
Fording depth 27.5 ins.
Theoretical radius of action
     Roads 198 miles
     Cross-country 130 miles
     Roads 40 m.p.h.
     Cross-country 25 m.p.h.
     Front plate
Engine Maybach 6-cyl. NL 42 TRKM—100 hp.
Steering Under 15°—normal; over 15° epicyclic
Crew         4

German: p. 47

Battery Commanders Telescopes

Model 93, 8 x 6° 15′

Model 93 Battery Commanders Telescope

Model 93 Battery Commanders Telescope

This telescope is so constructed that the tubes can be used only in the vertical position. Its primary use is believed to be for observation and correction of artillery fire.

The eyepieces are of the multiple thread focusing type, and the diopter scale is graduated from +2 to -3. The reticle design consists of a vertical and horizontal mil scale graduated in increments of one mil from 0 to 30 on each side of 0. A light receptacle for artificial illumination of the reticle is provided.

The telescope is fitted with an angle of site mechanism. The hinge mechanism of the assembly consists of a simple hinge pin and a fitted yoke. The interpupillary mechanism is locked near the base and between the two tubes.

Telescope with Integral Tripod

Battery Commanders Telescope with Integral Tripod

Battery Commanders Telescope with Integral Tripod

The general purpose of this instrument is believed to be the observation and correction of fire, used with either machine guns or artillery. Unlike the instrument above, it employs a scissor movement and may, therefore, be used in either a vertical or horizontal position.

The reticle is the only angle measuring device provided. The limit for horizontal angles is 30 mils to the right and 10 mils to the left of zero. Vertical angles of plus and minus 20 mils can be measured. The 90° prisms are cemented. Minimum and maximum interpupillary distances are 60 mm and 70 mm.

The tripod is simply constructed, light in weight, and sturdy. It comprises an adapter or bracket for the telescope, a tripod head, and three tubular, fixed length legs with small metal shoes.


        Model 93       Tel. with Int. Tripod
Power8 diameters8 diameters
Field of view6° 15′
Interobjective distance3 3/4 ins. 
Interpupillary setting58 to 70 mm54 to 70 mm
Deviation of light in vertical plane10 ins.9 ins.
Diameter of Exit Pupil.2 ins..15 ins.
Overall length12 3/4 ins.12 ins.
Overall width6 1/4 ins. 
Weight6 lbs., 5 ozs.2 lbs., 2 ozs.
Length of tripod 11 13/16 ins.
Weight of tripod 11 ozs.

*The interobjective distance with the tubes horizontal, and the interpupillary scale set at 64 mm is 21 ins.; with the tubes vertical, and the interpupillary scale set at 64 mm, the interobjective distance is 5 ins.

Japanese: p. 178 (March 1, 1945)

Multiple Power Observation Telescope

Japanese Multiple Power Observation TelescopeThe Japanese multiple power observation telescope has three powers: 33X, 24X, and a third degree of magnification which has not been determined because of the absence of a third eyepiece in the instrument examined. Selection is made by rotating a dome-shaped holder in which the three eyepieces are mounted. This is somewhat similar to the turret head employed in motion picture cameras and to the selective eyepiece head of compound microscopes.

The objective is a compound lens with an air space between the crown and flint components. A modified porro prism is used for the erecting system. The reticle design used with the 24 power eyepiece is a simple cross. The 33 power eyepiece is not equipped with a reticle. No provision is made for an instrument light. An open line sight is provided for quick location of an object in the field of view.

The support which is made largely of machined brass castings has an upper and lower movement. The azimuth scale is graduated from 0 to 360 degrees in 1/2 degree steps; a vernier indicator allows readings of one minute to be made. Leveling is accomplished by adjusting the length of the tripod legs. The elevation arc is graduated in increments of 1/2 degrees to + and -30 degrees from 0. The tripod is of wood with brass fittings.


Length of telescopes         24 ins.
Weight of telescopes 12 lbs., 8 ozs.
Height of support 11 1/2 ins.
Distance between trunnions 5 1/4 ins.
Weight of support 13 lbs., 4 ozs.
Length of tripod 38 1/4 ins.
Length of tripod (legs extended) 55 1/2 ins.
Weight of telescope 8 lbs., 8 ozs.

Japanese: p. 177 (March 1, 1945)