parts than we knew anything about. After the wreck I picked up a little
valve strip stem. It was very light and very strong. I asked what it was
made of. Nobody knew. I gave the stem to my assistant.
”Find out all about this,” I told him. ”That is the kind of material we
ought to have in our cars.”
He found eventually that it was a French steel and that there was
vanadium in it. We tried every steel maker in America–not one could
make vanadium steel. I sent to England for a man who understood how to
make the steel commercially. The next thing was to get a plant to turn
it out. That was another problem. Vanadium requires 3,000 degrees
Fahrenheit. The ordinary furnace could not go beyond 2,700 degrees. I
found a small steel company in Canton, Ohio. I offered to guarantee them
against loss if they would run a heat for us. They agreed. The first
heat was a failure. Very little vanadium remained in the steel. I had
them try again, and the second time the steel came through. Until then
we had been forced to be satisfied with steel running between 60,000 and
70,000 pounds tensile strength. With vanadium, the strength went up to
170,000 pounds.
Having vanadium in hand I pulled apart our models and tested in detail
to determine what kind of steel was best for every part–whether we
wanted a hard steel, a tough steel, or an elastic steel. We, for the
first time I think, in the history of any large construction, determined
scientifically the exact quality of the steel. As a result we then
selected twenty different types of steel for the various steel parts.
About ten of these were vanadium. Vanadium was used wherever strength
and lightness were required. Of course they are not all the same kind of
vanadium steel. The other elements vary according to whether the part is
to stand hard wear or whether it needs spring–in short, according to
41
what it needs. Before these experiments I believe that not more than
four different grades of steel had ever been used in automobile
construction. By further experimenting, especially in the direction of
heat treating, we have been able still further to increase the strength
of the steel and therefore to reduce the weight of the car. In 1910 the
French Department of Commerce and Industry took one of our steering
spindle connecting rod yokes–selecting it as a vital unit–and tried it
against a similar part from what they considered the best French car,
and in every test our steel proved the stronger.
The vanadium steel disposed of much of the weight. The other requisites
of a universal car I had already worked out and many of them were in
practice. The design had to balance. Men die because a part gives out.
Machines wreck themselves because some parts are weaker than others.
Therefore, a part of the problem in designing a universal car was to
have as nearly as possible all parts of equal strength considering their
purpose–to put a motor in a one-horse shay. Also it had to be fool
proof. This was difficult because a gasoline motor is essentially a
delicate instrument and there is a wonderful opportunity for any one who
has a mind that way to mess it up. I adopted this slogan:
”When one of my cars breaks down I know I am to blame.”
From the day the first motor car appeared on the streets it had to me
appeared to be a necessity. It was this knowledge and assurance that led
me to build to the one end–a car that would meet the wants of the
multitudes. All my efforts were then and still are turned to the
production of one car–one model. And, year following year, the pressure
was, and still is, to improve and refine and make better, with an
increasing reduction in price. The universal car had to have these
attributes:
(1) Quality in material to give service in use. Vanadium steel is the
strongest, toughest, and most lasting of steels. It forms the foundation
and super-structure of the cars. It is the highest quality steel in this
respect in the world, regardless of price.
(2) Simplicity in operation–because the masses are not mechanics.
(3) Power in sufficient quantity.
(4) Absolute reliability–because of the varied uses to which the cars
would be put and the variety of roads over which they would travel.
(5) Lightness. With the Ford there are only 7.95 pounds to be carried by
each cubic inch of piston displacement. This is one of the reasons why
Ford cars are ”always going,” wherever and whenever you see
them–through sand and mud, through slush, snow, and water, up hills,
across fields and roadless plains.
42
(6) Control–to hold its speed always in hand, calmly and safely meeting
every emergency and contingency either in the crowded streets of the
city or on dangerous roads. The planetary transmission of the Ford gave
this control and anybody could work it. That is the ”why” of the saying:
”Anybody can drive a Ford.” It can turn around almost anywhere.
(7) The more a motor car weighs, naturally the more fuel and lubricants
are used in the driving; the lighter the weight, the lighter the expense
of operation. The light weight of the Ford car in its early years was
used as an argument against it. Now that is all changed.
The design which I settled upon was called ”Model T.” The important
feature of the new model–which, if it were accepted, as I thought it
would be, I intended to make the only model and then start into real
production–was its simplicity. There were but four constructional units
in the car–the power plant, the frame, the front axle, and the rear
axle. All of these were easily accessible and they were designed so that
no special skill would be required for their repair or replacement. I
believed then, although I said very little about it because of the
novelty of the idea, that it ought to be possible to have parts so
simple and so inexpensive that the menace of expensive hand repair work
would be entirely eliminated. The parts could be made so cheaply that it
would be less expensive to buy new ones than to have old ones repaired.
They could be carried in hardware shops just as nails or bolts are
carried. I thought that it was up to me as the designer to make the car
so completely simple that no one could fail to understand it.
That works both ways and applies to everything. The less complex an
article, the easier it is to make, the cheaper it may be sold, and
therefore the greater number may be sold.
It is not necessary to go into the technical details of the construction
but perhaps this is as good a place as any to review the various models,
because ”Model T” was the last of the models and the policy which it
brought about took this business out of the ordinary line of business.
Application of the same idea would take any business out of the ordinary
run.
I designed eight models in all before ”Model T.” They were: ”Model A,”
”Model B,” ”Model C,” ”Model F,” ”Model N,” ”Model R,” ”Model S,” and
”Model K.” Of these, Models ”A,” ”C,” and ”F” had two-cylinder opposed
horizontal motors. In ”Model A” the motor was at the rear of the
driver’s seat. In all of the other models it was in a hood in front.
Models ”B,” ”N,” ”R,” and ”S” had motors of the four-cylinder vertical
type. ”Model K” had six cylinders. ”Model A” developed eight horsepower.
”Model B” developed twenty-four horsepower with a 4-1/2-inch cylinder
and a 5-inch stroke. The highest horsepower was in ”Model K,” the
six-cylinder car, which developed forty horsepower. The largest
cylinders were those of ”Model B.” The smallest were in Models ”N,” ”R,”
and ”S” which were 3-3/4 inches in diameter with a 3-3/8-inch stroke.
43
”Model T” has a 3-3/4-inch cylinder with a 4-inch stroke. The ignition
was by dry batteries in all excepting ”Model B,” which had storage
batteries, and in ”Model K” which had both battery and magneto. In the
present model, the magneto is a part of the power plant and is built in.
The clutch in the first four models was of the cone type; in the last
four and in the present model, of the multiple disc type. The
transmission in all of the cars has been planetary. ”Model A” had a
chain drive. ”Model B” had a shaft drive. The next two models had chain
drives. Since then all of the cars have had shaft drives. ”Model A” had
a 72-inch wheel base. Model ”B,” which was an extremely good car, had 92
inches. ”Model K” had 120 inches. ”Model C” had 78 inches. The others
had 84 inches, and the present car has 100 inches. In the first five
models all of the equipment was extra. The next three were sold with a
Do'stlaringiz bilan baham: |