Capsize Prevention Devices

brian eiland · Nov 17, 2015

I'm not sure of what exactly is inside the 'brains' (detection system) of the UpSideUp device, but I assume it is some sort of arrangement of accelerometers combined with level detection that would sense the boat's attitude,...thus knowledge of all the various sea states might not have to be know, just how the boat is reacting and if it is in danger.

A French company, established since 2004 by Multihull sailor and engineer Christophe Lassegue, Ocean Data Systems produced a rudimentary UpSideUp system for Alan Gautier in the 2006 Route Du Rhum on Foncia. The current version of the system has been tested by Thomas Coville on Sodebo and is in use aboard all the Ultime trimarans including the MOD70’s. These boats use the “Master” version of the system with multiple sensors and actuators controlled by a central brain set to release sheets at certain angles of heel, bow down angles and rig loads. It is a marvel of technology and can be individually programmed to settings determined by the skipper. These individual settings are certainly deemed a competitive advantage for each team and it wouldn’t surprise me if much of the training these teams undertake prior to racing is to calibrate and set the system to allow maximum racing on the ragged edge.
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The Master version ofers all the functions of UpSideUp, either in standard or in option. It is delivered with the ControlCenter software in order to change the settings if necessary.

Features :

The release thresholds can be set
Autonomous running after setting
Separate management of six release groups
Two release levels (high or low according to the availability of the crew for example)
Up to 6 electromechanical actuators to be spread into six release groups
CAN bus enabling the connection of extra actuators, sensors or any compatible device
Manages the point of sail context (upwind/downwind)
Alarm warning when the system is about to trigger
Wireless control and fixed control panel for a manual control of the actuators
Recording of data and events in a log file
Manages the textile and hydraulic sheet systems
Input provided for Man Over Board, collision or floating object detection, quick release button, or other electric signal
Testing functions and control indicators
Embedded buzzer and external buzzer output
Adjustable recovery mode
Supply (Main Unit) : 10/32 vdc - 0.75 W
Dimensions (Main Unit) : H 200 x L 120 x P 38mm -
Weight : 360g
http://www.oceandatasystem.com/?mode=developpement-ods-upsideup&id=844
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UpOnStands · Nov 19, 2015

just noticed that the SIG45 appears to have anti-capsize system
page 20 of http://www.lebreton-yachts.com/downloads/LeBreton SIG45 Catamaran Brochure 3MB.pdf

Skip JayR · Nov 20, 2015

brian eiland said: ↑

I'm not sure of what exactly is inside the 'brains' (detection system) of the UpSideUp device, but I assume it is some sort of arrangement of accelerometers combined with level detection that would sense the boat's attitude,...thus knowledge of all the various sea states might not have to be know, just how the boat is reacting and if it is in danger.
Click to expand...

Does anybody know about the prizes for such a system ? What are the total costs (inclusive installation, maintenance, software update etc. ....) ?

I'd estimate the total costs around 8-10,000 Euros for hardware, electric system, installation, programming, regularly maintenance, updating.

hump101 · Nov 21, 2015

brian eiland said: ↑

I'm not sure of what exactly is inside the 'brains' (detection system) of the UpSideUp device, but I assume it is some sort of arrangement of accelerometers combined with level detection that would sense the boat's attitude,...thus knowledge of all the various sea states might not have to be know, just how the boat is reacting and if it is in danger.
Click to expand...

Detecting the motion/level of the vessel is trivial, any smartphone or flight controller can do that. The real problem is the response to that information. Sheet release is frequently not the best response to save the vessel from capsize, depending on heading, gust magnitude, and seastate, as we've seen recently with the TJV. A proper system needs to include this information (easy to measure) and what to do with it (not so easy to implement!).

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Capsize Prevention Devices

brian eiland Senior Member

Attached Files:

1Solutions_UpSideUp_120903.pdf

UpOnStands Senior Member

Skip JayR Tri Enthusiast

hump101 Senior Member

Multihull Capsize Prevention <split>

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