Section 1: MECHANICAL INSTALLATION
1.5Bolt-In Installation
1.5.1 Check and Preparation of Hull Structure
Refer to Seakeeper Drawing No. 90261, Seakeeper 16 Gyro Installation Details –Bolt in
Method. Important dimensional and load information is given in this drawing that will impact the
design details of the structure that will receive the gyro. It is assumed that a proper structural
analysis has been performed for the hull structure to which the gyro will be fastened to insure
proper strength margins for the loads the gyro will create during operation.
The hull structure supporting the gyro should be installed so the gyro is parallel to the waterline.
In addition, the four areas on top of the beams on which the feet of the gyro foundation
and isolation gaskets will rest need to be co-planar within .06” (1.5 mm) to minimize
potential distortion of gyro support frame when installed.
Seakeeper provides an installation template kit, P/N 90282, which contains four plates that
mimic the mating surfaces of the four feet located on the gyro’s foundation. These plates have 4
holes located at the same centers as the mounting holes on the gyro. The fixture locates the
hole patterns at the proper spacing both in the fore-aft direction and the port-starboard direction.
See Figures 5 below. Once assembled, the fixture can be used to check clearances and
alignment of the hull structure.
Note: Do NOT use the installation fixture to establish gyro envelope dimensions. Refer
to Drawing No. 90261 for envelope dimensions. A 3-D model of the gyro is available on
the Seakeeper website (www.seakeeper.com) to aid in designing the gyro foundation and
the space around the gyro.
NOTE: MAKE SURE NO OBSTRUCTIONS FROM THE HULL STRUCTURE CAN BE SEEN WITHIN THE INSIDE
OF THE INSTALLATION TEMPLATE KIT (INSIDE THE MARKED RED LINES). REFERENCE SEAKEEPER
DRAWING NO. 90261.
FIGURE 5 –INSTALLATION FIXTURE
