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Design considerations
The OTW must be designed to work with a mix of
aircraft at airports where the gate is not exclusive to
one airline and one aircraft type
pendent of the control system in the forward
bridge. This is so that either bridge is
operable in the event that the other bridge
is inoperable or if the
passengelro ad on the aircraft is low and
does not necessitateth e use of the rear
bridge for a particular flight. A separate
control system is also required where a
client chooses to graft an OTW onto an
existing front-loading bridge.
The OTW must employ a means of
removing the bridge from an aircraft in the
event of a power failure or a malfunction
in the bridge. In traditional apron drive
bridges, the gantry brakes can be released
and the bridge towed away from the aircraft,
allowing push back. In the case of a
docked OTW, the bridge can be pulled
away from the aircraft in the same manner,
but the height of the bridge cab will
feel safea nd rigid to the passengear nd
must not sway or bounce, and experience
has shown that the drive systems should
be electromechanicarl ather than
hydraulic. The proper design of an electromechanical
drive system results in a selflocking
feature that prevents unexpected
lowering of the bridge. A further safety
margin exists when two independent drive
systems are used, one on each side of the
bridge, each capable of holding the weight
of the bridge.
A secondarye lectromechanicahl ard
stop system is alSo desirable. This hard
stop system automatically adjusts to a
position, a safe distance above the wing, to
hold the weight of the bridge in the event
that the control system (or the bridge
operator when in manual drive mode)
causes the bridge to be lowered to a point
..Neil Hutton is vice president of business development
and R&D for Dewbridge Airport Systems based
in Ottawa. Canada
44 PASSENGER TERMINAL WORLD September 2003
The primary consideration is that the
design of an OTW must be robust and'
safe. There must be no danger of the
bridge making contact with a wing or a
winglet, so in addition to higher safety
factors the bridge design must employ
redundant safety features. The OTW must
Semler Industries Inc.
3800 North Carnation Street
Franklin Park, IL 60131
Phone: (847) 671-5650
Fax: (847) 671-7686
semler@semlerindustries.com
www.semlerindustries.com
Semler Industries, whose roots
date back to 1905, has supplied
the aviation industry with
ground support equipment for
over 45 years. Our reputation
for durability and quality
construction has made us the
world-class leader in the
potable water industry.
Our rugged stainless steel
cabinet construction and high
polish finish guarantee long
life, and the easy-to-clean
design promotes sanitary
conditions. All Semler Water
Potable Cabinets are listed
and marked by a Nationally
Recognized Testing Laboratory
and certified to UL and CSA
standards. Customized options,
including CSA approved components,
are available to meet
your specific needs.
High-Volume
Potable Water Cabinet
The first and only for AIRBUS A380
The SllF-3000-A380 PWC is designed specifically to meet the unique
demands of the Airbus A380 by delivering fresh water at 25 gallons per
minute- exceeding the standard PWC capabilities of 12 gallons. With an
internal volume of 53 cubic feet to accommodate its larger diameter hose
and hose reel, the A380 still has the same thermal capabilities as
traditional Semler PWCs. Semler’s IntelliFlush® circuitry ensures that
the water residing in the cabinet stays fresh.
Meeting the demands
of every climate around
the world:
SI-1000-A380
For warm weather climates
that never reach sub-freezing
temperatures.
SI-1500-A380
For moderate climates that
experience occassional
sub-freezing temperatures.
SI-2400-A380
For cold weather climates
that frequently experience
sub-freezing temperatures.
SI-3000-A380
For extreme climates that
experience often-severe
sub-freezing temperatures.
STANDARD FEATURES
■ Type 304 stainless steel, 16 gauge, #4 polish
finish interior and exterior.
■ Welded construction through-out.
■ Welded, ground, and polished joints.
■ Double wall insulated on all sides, doors,
top and bottom.
■ For worker safety, heated models have no
exposed heating elements.
■ Energy efficient with excellent heat retention.
　
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