| Engine | Eight cylinders in line; bore 2-7/8"; stroke 4-3/4"; displacement 246.7 cubic inches; S.A.E. H.P. 70 at 3,000 r.p.m. Nelson Bohn aluminum alloy pistons with Invar steel strut; this piston has the lightness of aluminum alloy design but the Invar steel strut controls the diameter under expansion enabling close and uniform clearances to be held between the piston and cylinder. Drop forged, heat treated connecting rods. |
|---|
| Cylinders | Cast en bloc; crankcase has strongly ribbed sections; divided below center to secure very deep section for extreme rigidity. |
|---|
| Valves | Located at side in cylinder; silchrome steel. |
|---|
| Crankshaft | Drop forged heat treated steel; very large bearings and cheeks to insure stiffness; supported by five bearings. Lanchester vibration damper used on front end to ensure freedom from vibration. |
|---|
| Crankshaft bearings | Five, large diameter, babbitt lined. |
|---|
| Camshaft | Supported on six bronze bearings; camshaft hardened and ground. |
|---|
| Camshaft drive | This is by silent chain with provision for tightening to insure continued silence of action over long periods of time. |
|---|
| Engine lubrication | Full pressure feed by gear pump through strainers to main and connecting rid big end bearings. |
|---|
| Cooling system | Honeycomb type radiator with extra large frontal area. 18" four blade fan. Centrifugal pump driven in conjunction with fan by V-belt. belt has provisions for tightening. |
|---|
| Gasoline supply | Stewart vacuum system, gasoline tank located at rear of frame, three point suspension protected by steel cover and cross frame; electric gasoline gauge mounted on instrument board. |
|---|
| Carburetor | Carburetion by Schebler carburetor with special manifold design and carefully worked out hot spot design. |
|---|
| Clutch | (Unit with engine). Single plate, heavy duty, dry disc type; easily adjustable to compensate for wear. |
|---|
| Transmission | Three speeds forward and one reverse; transmission lock located at base of gear shift lever; gear shift knob very conveniently located at right of steering wheel. |
|---|
| Drive | Drive from transmission to rear axle through two Universal Joints and light tubular Propellar Shaft greatly enlarged through center portion to prevent whip at high speeds; torque and brake reaction taken through rear springs which are mounted in rubber. |
|---|
| Front axle | Reverse Elliott type; "I" Beam; tapered roller bearings. |
|---|
| Rear axle | Semi-floating type; ball and tapered roller bearings throughout. |
|---|
| Steering gear | Special steering gear with patented Ross cam and trunnion construction with low ratio to facilitate steering with balloon tires. |
|---|
| Brakes | Internal expanding, three-shoe brakes of Bendix Perrot type on all four wheels; 12" in diameter, 1-3/4" wide, total braking surface 68 square inches on each wheel; brakes equalized between front and rear pairs; foot pedal operates brakes on all four wheels; hand lever operates brakes on rear only. |
|---|
| Frame | Pressed steel channel, seven inches deep, two inches wide, flange 5/32" thick, six extremely heavy and rigid cross members to insure freedom from body weave. |
|---|
| Chassis lubrication | Reduced to a minimum by oilless bushings and rubber shock insulators, Zerk lubricators used at few points requiring lubrication. |
|---|
| Springs | Front 38" over all long by 2" wide, semi-elliptic type. Rear 60" over all long by 2" wide, semi-elliptic type. All springs mounted on rubber shock insulators eliminating squeaks and wear and care of shackle bolts, also adding greatly to riding comfort. |
|---|
| Wheels | Artillery type standard equipment. |
|---|
| Tires | Balloon cord tires, heavy duty type, six ply 31 x 6. |
|---|
| Electrical system | Delco Remy starting, lighting and ignition with 142 ampere battery; six-volt system. Generator has third brush control and is driven by silent chain. Starting motor located at the rear; operates through Bendix drive with flywheel. Distributor — semi-automatic device located on top of generator. |
|---|
