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precautionary measures are taken. This article applies
specifically to the conductance measurement of
Continuous Overheat Temperature Sensors and is not
intended to replace Fenwal test procedures. Its purpose is
to provide supplemental information to aid in the
verification of temperature sensors.
Acknowledgements:
Stephen Kosik, Applications Engineer, Tegam Inc., Ten Tegam Way;
Geneva, Ohio 44041; TEL: 440.466.6100; www.tegam.com
Jim Gardner, Product Support Manager, Fenwal Safety Systems; A
Division of Kidde Technologies, Inc. 700 Nickerson Road, Marlborough,
MA 01752 USA, TEL: 508.481.5800; www.fenwalsafety.com
Kevin Kaufman, Eastern Region Sales Manager, Tegam Inc., Ten Tegam
Way; Geneva, Ohio 44041; TEL: 440.466.6100; www.tegam.com
Dick Stearns, Production Support Manager, Fenwal Safety Systems; A
Division of Kidde Technologies, Inc. 700 Nickerson Road, Marlborough,
MA 01752 USA, TEL: 508.481.5800; www.fenwalsafety.com
References:
1 Fenwal Safety Systems; Abbreviated Component Maintenance Manual,
Continuous Sensing Elements, Series 35XXX-X-XXX. FSS Publication
Number 512; 26-14-12., Feb. 12, 1996.
2 Tegam Inc;, Model 252, Digital Impedance Meter Instruction Manual,
PN# 43158; Feb. 1991.
Maximum
Allowable
Conductance, (μS)
Active Sensor
Length (in)
Conductance
(μS/in)
Constant from
Table 1
= X
gutter credit to run here.
gutter credit to run here.
the Highs
Whoopee horsepower, no more
torque steer, rich interior
textures and sheens.
the Lows
Joyless six-speed, aloof clutch,
have to crawl into the trunk to
fold the seatbacks.
The Verdict
More muscle and better manners,
not your father’s Datsun.
NISSAN ALTIMA 3.5SE
unruly no more
famous for its torque-steering tantrums, THis mid-sizer gets
even more power and straightens up its act.
Could downsizing be the fashion
once again? It is at Nissan. This new
Altima is fresh off the chopping block.
With high gas prices, it’s logical to think
that automakers are reaching for a quick
mpg improver. But fuel was still cheap
when the new-in-2002 model returned to
the incubator for its next-cycle redesign.
And Nissan had a different goal: Ramp
up the sporty feeling that separates the
Altima from its more reserved Camry
and Accord competitors. Nissan wanted
quicker responses, more agility, and easier
maneuvering in the metro madness.
So the wheelbase was abbreviated almost
an inch, and nearly three times that
much came off overall length. Width is up
a fraction, height stays the same.
And sportiness? If you choose the SE
version with the 270-hp V-6 and six-speed
manual, hang on. Engine output is up 20
torque steer in the lower gears. Enough
already, Nissan decided. The fix: Lower
the powerplant 0.6 inch to level the halfshafts
and equalize the joint angles side
to side. Steering geometry is also significantly
revised.
The 3.5 has torque enough to easily buzz
the tires on launch. But there’s little tugging
on the wheel now and little deviation
in the path when the power goes down. Unruly
no more, this front-driver.
V-6 Altimas come in SL and SE versions.
SE, the sporty choice, has a stiffer
suspension calibration with crisp-riding
shocks. Its wheels are up one inch in diameter
and wider by a half-inch to 7.5. It gets
lower-profile 215/55R-17 all-season tires
and faster-ratio power steering. Steering
effort now rises with speed, a first for the
Altima. Over the road the ride is reassuringly
quiet, a pay-off for the newly stiffhorsepower
in the advertising but more in
the car, thanks to the deflationary effect
of the latest SAE rating system. Weight,
at 3357 pounds, is 137 more than the Altima
we tested in February 2003. Thinner
sections of higher-strength steel bring a
stiffer structure—you can feel the difference—
with a small weight increase.
The stronger engine easily makes up
for the extra pounds. Getting from 0 to 60
at 5.9 seconds ties the 2003 car; the new
one runs away in the quarter-mile, finishing
at 99 mph (96 in the older car). Elapsed
time for both cars is the same, 14.6 seconds.
Fuel economy is up 1 mpg on the highway
compared with the old base model, to 21
city and 29 highway, creditable for a mobile
with this much zing.
The big news is not the numbers, however.
The V-6 Altima has always been
powerful, and it’s always been nasty for
RO AD TEST
BY PATRICK BEDARD
中国航空网 www.aero.cn
航空翻译 www.aviation.cn
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