Seakeeper 7000 User manual

DOCUMENT # 90020, REV 5
MAR 2009
MODEL 7000 GYRO
INSTALLATION MANUAL
P.O. BOX 999
14528 SOUTH SOLOMONS ISLAND ROAD.
SOLOMONS, MARYLAND, 20688, U.S.A
PHONE: [phone]
FAX: [phone]
E-MAIL: [e-mail]

DOCUMENT # 90020, REV 5
MODEL 7000 GYRO
INSTALLATION MANUAL
MAR09
Contents:
Section 1 – Mechanical Installation
Section 2 – Electrical Installation
Section 3 – Cooling Installation
Section 4 – Startup
Section 5 – Installation Checklist
Section 6 – Drawings
P.O. BOX 999
14528 SOUTH SOLOMONS ISLAND ROAD.
SOLOMONS, MARYLAND, 20688, U.S.A
PHONE: [phone]
FAX: [phone]
E-MAIL: customer[email protected]om

DOCUMENT # 90020, REV 5
MODEL 7000 GYRO
INSTALLATION MANUAL
MAR09
Section 1 – Mechanical Installation
P.O. BOX 999
14528 SOUTH SOLOMONS ISLAND ROAD.
SOLOMONS, MARYLAND, 20688, U.S.A
PHONE: [phone]
FAX: [phone]
E-MAIL:
[e-mail]

DOCUMENT # 90020, REV 5 MODEL 7000 GYRO INSTALLATION MANUAL-MAR09
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Introduction –
This document is intended to give details and guidance to a boat builder or equipment installer to install
the Seakeeper, Inc. Model 7000 Stabilizing Gyro. The gyro is capable of producing loads up to 23.5 kN
(5300 lbs.) on each foundation saddle and careful consideration should be given to foundation design to
insure vessel is capable of handling the loads the gyro will impart into the hull. It is assumed that
personnel involved in installation are familiar with GRP structures as well as the use of high strength
adhesives that will be used to bond the gyro to the hull structure. It will be helpful to the installer to have
reviewed the following list of reference drawings to insure the installation procedure is fully understood.
Reference Drawings –
90001, Model 7000 Gyro Hardware Scope Of Supply
90002, Model 7000 Gyro Model 7000 Gyro General Specifications, Design Loads and Env.
Dimensions
90003, Model 7000 Gyro Cooling Schematic
90004, Model 7000 Gyro Assembly & Parts List
90005, Model 7000 Gyro Cable Block Diagram
90012, Model 7000 Gyro Installation Jig Assembly
FIGURE 1 – MODEL 7000 GYRO

DOCUMENT # 90020, REV 5 MODEL 7000 GYRO INSTALLATION MANUAL-MAR09
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Precautions –
•Gyro flywheel is supported by precision bearings, make certain while unpacking and lifting gyro
assembly to not drop or impart mechanical shock as damage to bearings could result.
•Gyro is shipped with a temporary aluminum brace (See Fig 1 Above) installed on the forward end
of the foundation saddles/beams. Do not remove this brace until after installation of the gyro is
complete.
•While handling / installing gyro assembly, protect exposed hydraulic brake cylinder rods (See Fig
1 Above) from scratches or damage as this could lead to premature seal failure and oil leaks.
•While handling / installing gyro assembly, do not allow electrical fittings that exit bottom of gyro
enclosure to come in contact with any surface or object as this could damage the fittings and
potentially affect the vacuum integrity of the enclosure.
•Exercise care to protect gyro painted finish as damage to finish could lead to early appearance
degradation of installed gyro.
Selection of Gyro Installation Location:
Selection of mounting location of gyro should consider the following desirable features:
•Removable overhead access or sufficient clearance for removal / re-installation of gyro enclosure
for overhaul maintentance in future years.
•Clearance for replacement of gimbal angle sensor on gyro port side (see Figure 4 below).
•Clearance for filling / purging brake hydraulic oil (see Figure 4 Below).
•Clearance for filling / purging water/glycol cooling circuit.
•Clearance for replacement of brake hydraulic cylinder.
•Space for recommended sound / safety enclosure.

DOCUMENT # 90020, REV 5 MODEL 7000 GYRO INSTALLATION MANUAL-MAR09
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FIGURE 4 – INSTALLED GYRO CLEARANCE CONSIDERATIONS

DOCUMENT # 90020, REV 5 MODEL 7000 GYRO INSTALLATION MANUAL-MAR09
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Preparation Of Hull Structure-
Reference Seakeeper Drawing No. 90002, Model 7000 Gyro Model 7000 Gyro General
Specifications, Design Loads and Env. Dimensions. Important dimensional and load information is
given in this drawing that will impact the design details of the structure that will receive the gyro as well
as selection of adhesive to bond the gyro into the hull.
The foundation “saddles” of the gyro are designed to be bonded directly to the composite hull
structure of the vessel to effectively distribute gyroscopic loads. A complete bond is required between the
inside surface of the saddles and the hull structure. To aid in determining quantity of adhesive required,
the surface area of Port saddle bond area is 2194 cm2. The starboard saddle bond area is 2002 cm2.
Seakeeper has an optional installation jig available, P/N 90012, that is intended to duplicate the
gyro foundation geometry in order to check clearances and alignment. The jig will allow the builder /
installer to lay-up and adjust the foundation dimensions to create a low-clearance fit between the gyro
foundation saddles and the hull structure. Shear strength of adhesive will be maximized if the cured
thickness between vessel structure and gyro saddles is minimized. Therefore, the jig should be used to
confirm that the overall dimensions of the foundations are square and level and that the adhesive gap is
within the adhesive manufacturer’s maximum recommended thickness. See figure 2 below.
Gyro supporting structure in hull should align installation jig and therefore the installed gyro to
within +/- 0.3° of the waterline plane of the vessel in any direction.
Seakeeper recommends that a safety enclosure be installed around the gyro to prevent accidental
entanglement of personnel or equipment while gyro is in operation. Installer may also choose to make
the enclosure of sound damping materials to reduce noise output from gyro. If sound damping enclosure
option is pursued, a small circulation / exchange fan is recommended to keep air temperatures inside
sound enclosure the same as ambient air in the compartment in which the gyro is installed.
There is a large torque about the gimbal axis when the gyro is precessing. Therefore, the gyro must
be housed in an enclosure or a compartment or installed in a cage so personnel or gear cannot come
into contact with the gyro while it is precessing.
The gyro should be treated with the same respect one gives a high speed rotating propeller shaft or
engine shaft. The gyro must be installed so contact is not possible while the flywheel is spinning.

DOCUMENT # 90020, REV 5 MODEL 7000 GYRO INSTALLATION MANUAL-MAR09
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Gyro noise has been measured under steady state conditions (no wave load) in Seakeeper's
lab and in our 43 ft Viking test boat. The steady state noise is typically in the range of 70-75
dB unweighted. As the frequencies emitting the highest sound pressures are low (like other
marine machinery), it is recommended that the gyro be installed in a cage in a machinery
space that is already treated with soundproofing.
If the gyro stabilizer has to be located outside a machinery space, it should installed in a
soundproof enclosure to prevent low frequency noise (approximately 160 Hz) from
entering the living spaces. In this case, the enclosure can be open at the bottom between
the hull stringers. A small exhaust fan should be installed in the top of the enclosure pull
ambient air thru the enclosure so they air in the enclosure does not heat up.

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FIGURE 2 – INSTALLATION JIG

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Unpacking Crate –
1) Reference Seakeeper Drawing No. 90001, Model 7000 Hardware Scope Of Supply for items that
ship with the gyro.
2) Remove electrical components, cables, and misc. items and set aside.
3) Remove “tray” and packing materials that secure gyro assembly inside the crate.
4) Attach spreader bar to the two lifting eyes located on the top of the gyro enclosure. Also attach a
leveling line that connects spreader bar to top end of brake cylinder structure. See Fig 3
below.
FIGURE 3 – LIFTING ARRANGEMENT
INSTALLATION OF GYRO-
1) Position Gyro near foundation.
2) Perform dry fit of gyro assembly over hull structure (no adhesive) to confirm that fit is good.
3) Confirm adhesive gap is within adhesive manufacturer’s requirements.
4) Raise gyro clear of foundation and thoroughly clean inside surfaces of gyro foundation saddles
with the appropriate solvent required by adhesive as shown in Figure 5 below.