The reconnaissance car is provided with a special steel body, mounted on a 1-ton truck chassis, White Model T E B-0. Four seats are built into the body. The two front seats are placed back to back. The two rear seats have a space between them of about 2 feet and are also placed back to back. There is a compartment between the two pairs of seats. The floor boards at the back end are extended to form a foot rest for the rear seat. The car is protected by a canopy top and roll curtains. A full set of tools is carried on the car. Also five chests are provided in which are carried all the special equipment assigned to the car. One chest slides into the body compartment under the rear front seat, one into the compartment between the rear seats, and the other three under the rear seat. The chassis used is similar to that used with the Staff Observation car on page 95. A complete description and directions for care, operation, and maintenance are contained in the “Handbook of the Reconnaissance Car, Model of 1918.” Ordnance pamphlet No. 1972. ARTILLERY TRACTOR, 5-TON MODEL OF 1917. Weights and Dimensions. Overall length (armored) 133.5 in.—3,400-mm. Overall width 63 in.—1,605-mm. Height (armored, to top of muffler) 72.5 in.—1,845-mm. Length of ground contact 91 in.—2,315-mm. Ground clearance 11 in.—280-mm. Weight (complete with full equipment) 9,200 lbs.—4,180 kg. Ground pressure (9 and 11 inch treads) 5.6-4.5 per sq. in. —0.394-0.316 kg. per sqcm. Weight of each track 545 lbs.—548 kg. Weight of each track shoe (9-in.) 12 lbs.—5.45 kg. Width of track shoes 9-11 in.—299-280-mm. Tread of tracks (center to center of tracks) 48.875 in.—1,243-mm. Diameter of turning circle (overall clearance) 176 in.—4,425-mm. Engine, number of cylinders 4 Bore 4.75 in.—220.8-mm. Stroke 6 in.—152.5-mm. Horsepower at 1,200 revolutions per-min 56. Oil reservoir capacity 3.25 U. S. Gal—12.22 liters. Road speed-gear used (per hour) Low speed at 1,200 rev. per minute of engine 1.94 miles—3.12 kilos. Direct speed at 1,200 rev. per minute of engine 3.92 miles—6.31 kilos. High speed at 1,200 rev. per minute of engine 7.37 miles—11.85 kilos. Reverse speed at 1,200 rev. per minute of engine 1.41 miles—2.27 kilos. Capacity of main gasoline tanks (two) combined 24 U. S. Gal.—90.5 liters. Capacity of auxiliary tank under armor 10 U. S.