Evening star., 1926-05-30
ORANGE AND BLUE HEADLIGHTS
PREVENTING GLARE DESCRIBED
Society of Automotive Engineers This Week Also
Will Hear of New Rim, Worm Drive for
Cars, Racers and Comfort.

racing field it is expected that AT
the race session engineering secrets
will be divulged that account for the
ability of engines only two-thirds the
| size of the small passenger car engine
to drive cars at an average speed of
100 miles an hour for 500 miles on the
Indianapolis brick speedway. One of
the reasons is the use Of super
chargers. which are likely to become
| common on the better class Of private
! passenger cars within the next few
| years. Another is that the engines
are of the straight eight-cylinder,
high-speed, long piston stroke type.
| What the other features are remains
| to be disclosed.
! In line with this subject is the prob
lem of studying the power output
of multi-cylinder high-speed engines,
which presents great difficulties. Prof.
II. NJ. Jacklin of the engineering ex-
! pertinent station of the Ohio State
University will give a description OF
!. a new engine indicating device devel-
oped by himself and G. p. Roberts.
which enables the test engineer to
watch the slow forming of the power
chart or diagram for each cylinder as
il is built up part by part during 600
revolutions of the engine crankshaft.
This new indicator enables rapid and
accurate work to be done when in
VeStigating the effects of variations
i'll ignition and valve timing, valve
| lift, carburetor adjustment and other
things that affect the power of the
individual cylinders. If small and in
expensive provisions for the applica-
ton of the instrument are made on
engines in production the device can
be- used in service stations to check
up on the valve and piston ring fit
and on various adjustments that are
now made only by guesswork.
Reducing Carbon Deposit.
Carbon deposits in the engine are
the cause of much engine trouble
Light on how they can he prevented
Or reduced will be shed by s. =. Mar
ley. G. j. Livingstone and w. A.
Cruise of the Mellon Institute Of In
dustrial Research at the University of
Pittsburgh. Tests made at the in.
stitute during the last IS months will
be described and the results shown.
The tests indicate that high operating
temperature OF the engine tends 10
reduce tho deposition OF carbon
Anti-Freeze Solutions.
A refreshing topic for Summer CON
slderation will be all address on anti
freeze solutions, to be given by II. X.
Cummings of the Bureau Of Stand
ards, which has given careful con-
Sideration to the matter of safe en-
gine cooling in Winter. He is expect
ed to tell what solutions will prevent
freezing in belowZero temperatures
and Will not corrode the metal, soften
hose connections to the radiator, evap-
crate too rapidly or otherwise be un-
satisfactory.
At the general session the first eve
ming c. r. Kettering, general director
OF the General Motors research labo-
ratories, is to give one of his charac-
teristically entertaining talks on phi
losophizing in physics.
Methods OF testing automobile gaso.
line will be described by T. S. Sigh.
1r., OF the Bureau Of Standards on
Thursday afternoon. and o. NJ. Burk.
hardt, manager Of the research de-
partment of the society. will give an
address on the causes Of wear and
tear in engines