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| NOOK
INDUSTRIES, INC. CASE STUDIES |
| Miller Park Retractable Roof
Aberdeen
Ferry Terminal
Unidock - Aircraft Maintenance Stand
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MAKING
THE RAIN GO AWAY AT MILLEr PARK
WITH NOOK ELECTRIC CYLINDERS |
- Achieved a long stroke with heavy load
- Moved heavy loads with 1-1/2 HP motor
- Overcame high wind, storm loads
- Provided an effective solution
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"We had constraints on several fronts," Lanari explains. "Our budget was limited, we had to move heavy metal frame doors a significant distance, and we were somewhat limited on the size of the motor we could put up there. We ended up using a 1-1/2 HP motor with the Nook electric cylinders."
– John Lanari, Project Manager for Miller
Park project at Uni-Systems
As the world's leading authority on large-scale motion technology, Uni-Systems was a natural choice for solving a persistent water problem at Miller Park, the new home stadium of the Milwaukee Brewers in Milwaukee, Wisconsin. Miller Park, which opened at the beginning of the 2001 baseball season, features a retractable roof that opens to provide a panoramic view of the Milwaukee skyline. Opening the roof involves rotating five massive pie-shaped panels around five individual pivots. During stormy weather, the roof leaked in the outfield area, prompting the Southeast Wisconsin Professional Baseball Park District, which owns Miller Park, to search for a consultant to stop the leaks. |
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PEDESTRIAN
WALKWAY:
Delivering A Safe, Movable
Ferry Bridge On-Time With Nook Ball Screw Jacks |
- Achieved 26 feet of travel under heavy load.
- Maintained high safety factor in design.
- Overcame pressing time demands.
- Completed project on time and under budget.
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"We
initially struggled in our efforts to find a supplier that could
produce the jacks within such a short time frame," Kydd recalls.
"We had begun contemplating the option of redesigning the walkway
with a winch system as the lifting mechanism, an approach that
would have been more costly and contrary to the architect's
wishes, when we discovered Nook Industries."
– Stuart Kydd, Project and Systems Manager
at Isleburn Mackay & Macleod Isleburn Mackay & Macleod
Ltd. designs and fabricates systems and components for large
marine-based structures. Recently, the firm won a contract
to design and manufacture a movable, covered, pedestrian walkway
at the Aberdeen Ferry Terminal in Aberdeen, Scotland. The
Northlink Ferry Company operates a daily ferry, which transports
passengers and automobiles back and forth between Aberdeen
and the Shetland Islands, and needed an adjustable pedestrian
bridge that could be raised and lowered to connect with ferries
at different tidal levels and provide passengers with a safe,
enclosed means for boarding and disembarking ships. |
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Facilitating
Commercial Aircraft Maintenance with Nook Ball Screws |
- Supported major design revision
- Provided long vertical travel under heavy loads
- Accelerated docking and de-docking time
- Increased safety
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"Reliability
was of prime importance on this project. If there is a problem
in the hangar, we have to be able to de-dock the plane in under
20 minutes. The four Nook ball screws that raise each of two
sections of the bridge, a long horizontal tube that runs the
length of each side of the plane, have to move this 400,000-pound
structure very quickly to meet that requirement. The Nook components
offered the best combination of efficiency and low-power requirements
at the best price."
– Mike Becker, Lead Engineer Uni-Systems
Uni-Systems secured a contract from American Airlines to
develop a sophisticated maintenance stand for conducting annual
required maintenance on its Boeing 777 and 767 class aircraft.
The Uni-Dock maintenance stand design has many moving sections,
including the 156-foot-long bridge, that require the application
of motion control systems. To facilitate the movements of
the various sections of the Uni-Dock, Uni-Systems selected
Nook ball screws because they were the most efficient mechanisms
for moving various Uni-Dock structures under heavy loads,
required the least amount of horsepower to operate, provided
the most reliable safety feature, and were the most cost-effective.
By deploying Nook ball screws, Uni-Systems rolled out a major
design revision, achieved long travel under heavy loads, accelerated
docking/de-docking time, and increased the Uni-Dock's level
of safety. |
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