"Forty" The 1908 Model C "Forty" was similar to the Thomas-Detroit C "Forty" from the previous year, which was very similar to the vehicle designed by Howard Coffin, the 1906 Olds Model "A". The engines were manufactured by other companies such as Westinghouse Machine Company, American, British Manufacturing Company, and Continental. In 1911 Chalmers started building most of its engines. The "Forty" engine's small radiator led to overheating. The 40 Touring or Roadster sold for US$2750 while the 40
Torpedo sold for US$3000. This was less than
American's lowest-price Model, which sold for US$4250.
"30" and "36" The "30" remained more or less the same, but the "36" (introduced in 1912) had a longer stroke and higher horsepower four-cylinder engine. Nickel plate replaced the brass in cars as it was easier to maintain, and Gray & Davis electric headlights replaced the gas headlights. Chalmers produced only one truck type in its history and called it the Model 14 Delivery. The Model "36" has a 4-speed
transmission. The foot brake is combined with the clutch pedal, so it releases the clutch when pushed halfway. The 30 Touring and the 30 Roadster sold for US$1500, when the
Oldsmobile Runabout was priced at US$650, the
Cole 30 sold for US$1500, and the
Oakland 40 went for US$1600. The 30 Coupe at US$2400 was nearer the Enger 40 car at US$2400.
"Six", "Light-6" and "Master Six" The first 6-cylinder was introduced in 1912 and called the Model 12 "Six". The company added a "Master Six" in September 1913 and "Light Six" at a New York show in January 1914.
George Dunham developed the six cylinders. The "Light Six" and "Master Six" have a redesigned engine, clutch, and dashboard. The "Six" Model Series Models 12 and 18 had overhead intake valves and a Rayfield
carburetor. As a high-end car, the Six came with an engine-driven tire pump and a compressed air starting system.
Master Six Model 24 Important improvements made their appearance in the Model 24. The Model 24, 7 passenger car, weighed 5475 pounds.
Engine Model 24 was the first Chalmer's engine to use a long-stroke T-head, and the company claimed that it could not be stalled as it used a chain that ran with the engine that would restart the machine when it was about to stall. The exhausts were on the right, the intakes on the left, and the enclosed valve functioning elements contributed to the motor's silent operation. The motor was brand new, and it came with T-head cylinders, an electric starter, a new forced-feed oiling system, and enclosed valve parts. The engine and the gearset were still one unit. One set of disks in the multiple-disk clutch featured cork inserts. The torsion rods were redesigned, and the rear springs were lowered. For the first time in a Chalmers model, the steering wheel was shifted to the left side, with the levers in the center. Also for the first time, the gasoline tank was carried in the back and fed by a pressure feed. The spare rims or wheels are kept in the back of the vehicle. It had a slightly smaller motor, a 2-inch larger
wheelbase, and was $225 less in roadster and four and five-passenger models; $325 less in six-passenger models; $100 less as a limousine; and $50 more as a coupe when compared to the 1913 six. In addition, on the 1913 model, the new Chalmers-Entz combined electric starting and lighting system replaced the air starting method, and a single bosch ignition replaced the prior dual types ignition. The cylinders in groups of three were castings with water-jacket spaces around the cylinders and around the valve seats and partly surrounding the
valve stem guides. The jacket heads were built into the water heater or return pipe to the radiator as one piece and in the head of the combustion chamber was a 2 3/8-inch threaded plug which when removed gave access to the entire combustion chamber for carbon removal without removing the cylinder castings. The water entered each cylinder group's rear face, which was the hottest section.The cylinder had a bore of 4 inches and stroke of 5.5 inches which gave an S.A.E. rating of 38.4 horsepower, a piston displacement of 414.7 cubic inches, and a stroke-bore ratio of 1.333 to 1. The 24 was part of a trend toward long-stroke engines with smaller piston displacements, which provided more economy and more horsepower per unit of piston displacement. In addition, the connecting rods, which were produced of nickel steel instead of open hearth in 1913, were 40 percent lighter and had a narrower section. Even though the pistons were longer than the previous year's model, which was necessary by the longer strokes employed, they were lighter. In addition, they were higher-quality castings with four-section rings. Each slot had a complete outside ring, but inside it was a sequence of arc-shaped segments creating an inner ring. Each segment was forced externally by a small
leaf spring, which was employed to keep the outer ring from pressing against the cylinder wall unevenly. The constant pressure obtained by this construction of
piston ring results in good compression being maintained for a longer period than was possible with the older type. The 40 percent carbon
crankshaft had curved cheeks that helped to move the weight into the middle of the shaft axis and provide optimum rotational balance. Three bronze plain bearings supported the shaft with a
babbitt alloy liner. Intake and exhaust valves were made of tungsten steel, which was also used in racing automobiles, helped prevent pitting. Both valve sets have a 7/16-inch lift and 85-pound pressure springs and are 2 1/8 inches in diameter. A new oiling system used a gear pump in the crankcase sump that fed oil to a large-diameter pipe that went from end to end and within the crankcase. Three branches led to the crankshaft bearings from this conduit. Instead of flowing into the sump, the overflow oil from these bearings was sent out the opposite end of the bearing, where it entered through a short pipe and dropped into little trays integral with the sides of the crankcase base, where it flowed into the oil troughs beneath the connecting rods. The scoops on the connecting rods dipped into these troughs. The final overflow from the troughs was recirculated in the sump. On the left side of the crankcase, in the web between the front and rear legs, an upgraded form of accessible oil strainer was installed. Timing gears were oiled directly from the front bearing's overflow via a short pipe that poured the oil onto the crankshaft's pinion.
Clutch Oiled from Motor The multiple-disk clutch was improved by inserting cork inserts in one set of disks and operating the entire clutch in oil. A torque rod upgrade supported the clutch at the forward end by a curved leaf vanadium steel spring, saving 25 pounds in weight over the previous model.
Chassis The model 24 chassis came with a single wheelbase length and seven interchangeable body designs, all of which were held in place by eight small stamped brackets on the outside of the frame side members, four on each side. This mounting was created to decrease body squeaks and to make demounting easier. The steering components on the front axle had a twofold tilt. The knuckle pins pointed slightly outward and there was a backward inclination of 1.5 to 2 degrees. The frame was 1/16 inch thicker and heavier than before. The side members were lowered in front of the back axle but not inswept at the dash. The front springs were 39 inches long with 2-inch leaves. The three-quarter rears were put beneath the axle not because it provided lower body suspension, but because it provided approximately double the spring movement radius. The top leaf was 52 inches long with 2 /14-inch leaves and was made of vanadium steel.
Chalmers-Entz Starting System The Chalmers-Entz combination electric motor and generator was introduced in the Model 24 to crank the gasoline engine while also charging the storage battery. Instead of being mounted alongside the motor, the motor-generator was housed under the right front seat and was powered by a short propeller shaft that extended forward to the near rim of the flywheel and carried a small sprocket that was driven by a silent chain from a large sprocket on the flywheel. The generator was made in the Chalmers factory and was an 18-volt system. The complete unit was about 230 pounds in weight, 100 pounds for the motor-generator, 100 pounds for the battery, and 30 for the driving parts and attaching brackets.
Body As it converged into the cowl, the hood was expanded and heightened. The hood transition into the body was made easier by turning off the dash lights and replacing them with a combination headlight that featured two bulbs, one for headlights and the other for dash lights, located above the lens exits.
Price and options The roadster, four and five-passenger bodies were priced at $2,175, the six-passenger at $2,275, the coupe at $2,850, and the limousine at $3,680. In addition, $80 was fitted with McCue wire wheels. A $75 package that featured a Kellog tire pump, an extra rim casing, tube, and tire cover was also available. Mohair top, rain vision windshield, demountable rims,
speedometer, rear tire carrier with spare rim, electric horn, electric starter, and electric lighting were all on the normal list. Brewster green, grey, and meteor blue were the standard colors for open cars. Closed automobiles were only available in the color valentine coach blue.
Model 26 The Model 26-A came with a smaller engine and better performance being a lighter car.
Model 32 "Six-40" The Model 32-A "Six-40" was the company's first overhead camshaft engine. The engine was a
Weidely Motor Company with its
overhead camshaft (OHC) design. When comparing these later OHC Chalmers power plants to the T head or L head engines of the pre-World War I period, their specifications cannot be ignored. The Chalmers' two-roller-bearing-crankshaft F-head engine of 1910 had been a surprising performer, with a streamlined intake manifold feeding the cylinders via extremely large intake valves located in the head. The exhaust side valves were in a pocket, leaving a lot of room in the cylinder head for the inlets. In 1915, Chalmers made a great step forward with the incorporation of a full-overhead-camshaft Weidley engine, which pioneered the idea of driving the overhead-camshaft from the middle of the crankshaft instead of from the front or the rear. The model 6-40 had a bore and stroke of 3.125 and 5 inches, respectively, and camshaft rigidity was obtained by using a 2.25-inch diameter. The location of the camshaft drive in the center made it necessary to have four main bearings instead of the usual three. Tubular connecting rods were also used, which was a very advanced idea for its day.
"Six-30"/ "Y" The "Six-30" consisted of Models 35-A ("5-15" for 5 passenger and 115-inch wheelbase), 35-B (or "7-22" for 7-passenger body and 122-inch wheelbase), 35-C, and 35-D. The car's balanced crankshaft and a new
Morse silent timing chain gave it a reputation for a quiet and smooth ride. Later designs introduced a lower silhouette, one-piece windshield, and even disc wheels. To overcome the poor fuel available at the time, the "Hot Spot" and "Ram's Horn" were introduced in 1918 to improve engine performance. The "Six-30" came in a wide variety of body styles and wheelbases to seat between 2 and 7 passengers.
"Hot Spot" and "Ram's Horn" innovation Chalmers introduced two mechanical devices in 1917 to overcome lower gasoline volatility. The "Hot Spot" and "Ram's Horn" warmed up the air-fuel mixture.
Four wheel brakes In late 1923 customers could purchase the Model Y with an optional hydraulic four-wheel brake system for $75 based on hydraulics that had been initially developed for
Lockheed.
Lucile Sedan The couturière, costumier, journalist, and pundit,
Lucy Duff-Gordon lent her name to advertising for brassieres, perfume, shoes, and other luxury apparel and beauty items. In 1916 she signed a contract to design interiors for limousines and town cars for the 1917 Chalmers Model 35-B. The design was an attempt to improve sales by marketing a more luxurious design. The Town car had no protection for the driver and the sedan had removable door posts to create a look of an open hard top. Duff-Gordon had little other interest in the exterior and focused on improved interior materials such as a mahogany dash and finer cloth. == Racing ==