The Washington times. [volume] (Washington [D.C.]) 1902-1939, 1927-09-07

now are mounted at four points,
resting on rubber supports at the
front. They are set also slightly
| lower at the back than at the
front. making a straight line drive
| when the car Is carrying q full
load.
An important feature of the new
! Packards which is expected by
1 Packard service men to have a
| direct bearing on even still further
lessening the need for repair oper-
atoms is an arrangement by which
the cylinder walls are automatic.
ally oiled when the motor is
started. Each cylinder receives a
| spray of oil when the choke is
pulled out for starting. This is
expected to lie especially effective
against motor wear during cold
weather.
Extensive research work which
| Packard has done for years for the
aircraft divisions of the u. s.
Army and Navy and for the Tank
Corps division Of the Army led in
a large measure to two of the
most important Improvements in
the engines. One affects the crank
shaft and the other is a. completely
new type of valve spring, The
latter is much more important
than might be thought, for the
| motorist gives little heed to valve
springs, except when one breaks.
Valve Springs
With the rest of the industry,
Packard has been giving intensive
study to valve springs for more
than year. Their experience with
aircraft motors helped lead Pack.
ard engineers to the eolution. The
result has been found to be a great
Improvement in valve actirn, the
better seating of valves with con-
sequent lessening of necessity for
valve grinding, the end of valve
'chattering'' at high speed. an
even quieter motor and practically
the elimination Of valve sprinp
breakage
The spring actually is two springs
coiled together in such a manner
that they appear as one. They are
held at each end by unusually in.
senlous plates Slow motion mic.
lures during research work showed
that ordinary springs almost tied
themselves in knots, particularly At
high speed. because of the vibration,
travelling in waves up and down
their length. This was common 70
all automobile valFe springs nv
using two smaller springs the vibra.
ton or the new Packard spring was
raised TAR above any point possible
to be reached in operating a car.
Crankshaft Change
The new Packard crankshafts are
made much like the shafts in air.
cra1t motors. The connecting rod
Journals are hollow. The metal
eliminated from each journal light.
ened the weight each piston must
whip around the shaft by three.
quarters of pound. This with q
newly discovered system in counter.
weights makes each shaft as ner.
fectiy balanced as the pinions of the
finest watch. 'e
WIN all the changes that have
been made in the mechanical fea.
lures of both the Packard eight ana
Packard six they have been even
more simplified. Packard has found
that simplification, one of the hard.
est Things in engineering, has more
than anything else made for econ.
omy and ease of maintenance IF
motor cars.
Only a very limited number Of the
improvements which have been
made in the cars can be enumerated
because OF space limitations. MANY
add greatly to the interior anpear.
ance Of the bodies. With the added
beauty Of lines, too, there is avail
able the widest possible selection Of
color combinations.
Acceptance of the cars by the pub
nc is such that the Packard factory
Is operating at the greatest produc.
history.