Choosing Gyroscopic or fin yacht stabilization
If you or your significant other have experience an outing where:
~the weather report turned on you
~You have had a quartering sea or a sea to your beam
~Spent sleepless nights at anchor being rolled
~You run a slower boat and have been waked by other vessels
~Have older stabilizers that don’t work at anchor
~Are Stabilizers worth the money?
~Should I buy a boat that already has stabilizers?
~Do I need to do a rip and replace if my boat has old stabilizers?
~What is better gyroscopic or traditional fin stabilizers?
~Do I even have enough room for stabilizers?
Stabilization solutions can range from ~$60K installed to hundreds of thousands of dollars, depending on the tonnage of the boat and let’s say we take a 50’ yacht like the Elli-Yacht its going to set us back $50-$100K. However, if you’ve sunk $400K+ into a boat to call home and look at similar sized new boats that are stabilized, finding a solution that is $75K doesn’t feel better but, might just pencil out.
My research on Yacht world directionally indicates that a boat with stabilizers vs one without drives about a $50K premium than boat without.
Traditional stabilization systems are hydraulic and mechanically driven and this is still the case with the exception of newer magnetic actuation and gyroscopic stabilization systems. The key part of the stabilization system that with current stabilizers, eliminates or reduces roll often up to 90% even while the boat is on the anchor.
If you have an older system with hydraulic fins and out dated stabilization control systems DMS of Holland that offers an expansive line of stabilization solutions offers a state of the art DMS Universal control system that can be refit for your existing stabilization hardware. It even advertises having zero speed stabilization as an option.
Examples are new options like the Magnus Effect for slower moving vessels as well as ‘All-In One” stern mounted fins that act like traditional fins at slow speed and high speed trim tabs at speed.
Seekeeper was the original gyroscopic stabilization system and still holds the largest market share in OEM builds but due to the extreme loads placed on the boats stringers and structures, I haven’t seen that many refitted into an existing boat. There have also been new entrants into the gyroscopic stabilization market with simplified and lower cost options. These are pretty cool for the following reasons:
~They can be refit to the boat without having to pull it out of the water
~Because it’s contained in the boat you don’t have to drill holes in your hull
~They are self contained and don’t require hydraulic pumps
~These are now the most competitively priced systems too.
~ They rule when it comes to zero speed stabilization like at anchor or fishing
Downside
~They draw a lot of power
~They aren’t small one from Quick that would be appropriate for the Elli-yacht would be 26” square.
~They take time to spin up and draw power constantly
~And their effectiveness diminishes over 8-10 knots
Fin Stabilization trade offs:
~ You have to drill holes in your hull
~Fins by design stick out from your hull and can collide logs and damage them
~ Traditional systems require a hydraulic pump, power supply hydraulic lines and all of the installation complexity that comes with them
~ Maintenance can be much higher with traditional systems
Upsides:
~Fins rule for at speed conditions
~Instant on/off
~ With new electromagnetic contactless actuators, maintenance, power consumption, space constraints and zero speed stabilization tradeoffs are largely solved!
CMC Marines STAB 20 that would fit the Ell-yacht
Shaftless design
~If its ripped off no intrusion
~Removes seal maintenance on the shaft
~Compact 14” x 6” tall inside the hull
~Needs 2” of hull thickness reinforced.
~Power consumption is the lowest of any solution at 1kW in motion to 2kW
~200-240Vac low amperage of 0-10amp (also 24V but the tradeoff of 83A)
~We can run this off of our 21kWh bank for 8 hours before the generator would need to recharge our LFE bank
~With the stated average draw at anchor of .25kWh we would have 60 hours before recharging!
We’re also seeing 24V electric options from Humphree.com with fin and rapid interceptor trim tab integration. Side Power has cool new fins that actually create lift and reduce drag to improve speed and fuel efficiency. Unfortunately, that solution is still dependent on traditional hydraulic actuation.
0:00 Why put stabilizers on a boat
1:01 Intro
1:12 Stabilization solutions
6:03 Gyroscopic systems vs fin systems
11:06 Why we chose CMC Marine Stab 20
12:02 How much power does it draw
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