From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Detail specifications and a longitudinal section diagram for the Model T Lexington Car and its Ansted engine.
| Identifier | ExFiles\Box 50\3\ Scan052 | |
| Date | 6th January 1921 | |
| January 6, 1921 AUTOMOTIVE INDUSTRIES THE AUTOMOBILE 7 tom. The running boards are bolted to the bottom of the frame, thus giving it additional lateral strength. A cross member is carried from the underside of the running boards across the frame to prevent sag in the running boards and to stiffen the frame. The frame side members are now straight, the frame tapering from front to rear. This makes it possible to rest the body directly on the edge of the frame side members. Both the emergency and the service brakes are unusual in their construction. The hand brake operates upon a drum located on the rear of the transmission. The foot brake operates on drums attached to the rear wheels, and is in the form of contracting bands. The hand brake is operated through a spring tensioning device so that it is possible to bring the car to a stop with very light pressure. The foot brakes are operated by a cable guided to each rear wheel by a heavy tube attached to the frame. The brake cables pass through loops or guides on the axle tubes and therefore are not affected by the slight rotation of the axle when the brakes are applied. Fabric universal joints connect the three speed selective gearbox with the rear axle. The drive is Hotchkiss type. The transmission is completely fitted with anti-friction bearings. The counter shaft and spigot bearings are furnished by Hyatt, while the main shaft bearings are New Departure. The new body lines are very distinctive. The low hung effect of this body is obtained by carrying the doors right down to the frame line and cutting into the body sill to permit the door to shut. Sears-Cross locks are used in all the doors and dowel pins are provided in the side of the sill to hold the doors in position. This design is made possible by the deep, stiff frame. A triangular instrument board located in the center of the cowl carries the ammeter and oil pressure gage, speedometer, switches and two-way valve for controlling the tilt of the head light. The schedule of prices is as follows: Seven-passenger touring, $2985; four-passenger Sedanette, $4150; seven-passenger Salon Sedan, $4250. Detail Specifications Model T Lexington Car (All Dimensions in inches.) Engine General Bore . . . . . . . . . . . . . . . . . . . . . . . . . 3-1/4 Stroke . . . . . . . . . . . . . . . . . . . . . . . 4-1/2 Number cylinders . . . . . . . . . . . . . . . . 6 Compression . . . . . . . . . . . . . . . . . . .80 lb. Clearance volume . . . . . . . . . . . . .10.5 cu. in. Piston swept vol. . . . . . . . . . . . . . .37.3 cu. in. Total piston displacement. . . . . .224 cu. in. Horsepower by S. A. {Mr Adams} E. {Mr Elliott - Chief Engineer} formula. . 25.39 Horsepower developed .65 at 3000 r.p.m. Cylinders Center spacing . . . . . . . . . . . . . . . 6-1/4 and 4 Thickness cylinder walls . . . . . . . . . . . . . .1/4 Thickness cylinder head . . . . . . . . . . . .5/16 Thickness water jacket-walls. . . .3/16 Mean water jacket space . . . . . . . .13/16 Material . . . . . . . . . . . . . . . . . .Cast iron Pistons Thickness— head, 1/8; walls, 1/16 Clearance at top . . . . . . . . . . . . .009 to .013 Clearance at bottom . . . . . . . . . . .003 to .004 Number of rings . . . . . . . . . . . . . . . . . . . . . . .2 Length of piston . . . . . . . . . . . . . . . .3-17/32 Material . . . . . . . . . . . . . . . . . .Cast iron Longitudinal section of Ansted engine, showing arrangement of oil pump, and flywheel with internal teeth to mesh with teeth on driven clutch plates | ||