The Seakeeper 20HD is optimized to eliminate up to 95%
of boat roll on boats ~65 - 74 feet, up to ~60 tons. Unlike
traditional external fins, the Seakeeper 20HD requires only
modest electrical power and has no external appendages,
and can be installed virtually anywhere on board.
~ 45' - 54'
~ 55' - 64'
~ 65' - 74'
~ 75' +
| Weight | 2,960 lbs (1342 kg) |
| Dimensions | 52.7 L x 55.9 W x 40.4 H (inches) |
| 1.34 L x 1.42 W x 1.03 H (meters) |
Our patented cooling system allows the flywheel to spin at an extremely high rate of speed, providing ultimate performance in the smallest and lightest package possible.
Seakeeper’s vacuum encapsulation enables the flywheel to spin roughly three times faster, cuts flywheel weight by two-thirds and halves power requirements. Moreover, because the critical components (flywheel, bearings, and motor) are sealed for life in a vacuum, they are forever isolated from the marine environment.
Seakepeeper’s active control optimizes gyro torque, providing an unsurpassed level of performance. Unlike a passively controlled gyro, which must be turned off in the roughest conditions and/or at higher speeds, the Seakeeper is effective at all speeds and can be used in all sea conditions.
| Rated Speed | 3,850 RPM |
| Angular Momentum at Rated RPM | 20,000 N-M-S |
| Anti-Rolling Torque at Rated RPM | 43,076 N-M |
| Spool-up Time to Rated RPM | 70 minutes (3,850 RPM) |
| Spool-up Time to Stabilization | 50 minutes (3,100 RPM) |
| Spool-up Power | |
| AC Motor | 3000 Watts Max |
| DC Control | 240 Watts |
| Operating Power | |
| AC Motor (sea state dependent) | 1000 - 3000 Watts |
| DC Control | 240 Watts |
| AC Input Voltage | 208 - 230 VAC (+/- 10%), 50/60 Hz, Single Phase |
| DC Input Voltage | 24 VDC @ 10 Amps |
| Weight | 2,960 lbs (1,342 kg) |
| Envelope Dimensions | 52.7 L x 55.9 W x 40.4 H (inches) 1.34 L x 1.42 W x 1.03 H (meters) |
| Noise Output | 72-74 dBC at 1 meter |
