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Old 20 May 2013, 12:52   #121
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Originally Posted by Nos4r2 View Post
You could ask JK. Personally I can't really see any benefit from it. Almost everything discussed outside the commercial section is relevant to leisure users.
Maybe so, but I'm not convinced that everyone else is interested in what leisure ribbers may wish to discuss (bimini tops, cup holders, sun decks, go faster stripes, etc)
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Old 20 May 2013, 12:54   #122
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Old 23 May 2013, 12:32   #123
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Some thoughts on Kill Cords

Not wishing to hijack the existing thread, I have a few ideas on how the existing kill cord system could be improved.

The existing system is very simple, clunky and relies on the driver clipping on.

The clipping on is probably the weakest link in the chain. There are other potential failure modes such as the kill cord breaking before it trips!

So, what are the other options? Engine technology is certainly very advanced but we still have what is basically a microswitch opening a circuit to kill the engine.

One option would be to sense that the driver is in his seat. You may have this in your front passenger seat in your car. It can be done several ways, such as weight sensing or ultrasonic sensing and it deactivates the airbag is there is no on in the seat. I am sure the car companies pay peanuts for the sensors.

Or how about a system that detects an engine on full lock for a period of time?

Or to detect if the hand is off the throttle for more than a short period. That would also make you keep your hand on the throttle!

Our cars are full of sensors, why not take some technology to make sure you CAN'T be run over?

Or will it take legislation to make manufacturers take note?

Any more ideas?
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Old 23 May 2013, 14:07   #124
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Not wishing to hijack[i]read] the existing thread, I have a few ideas on how the existing kill cord system could be improved which have probably already been suggested but I will ignore them anyway.

The existing system is very simple, clunky and relies on the driver clipping on.

The clipping on is probably the weakest link in the chain. There are other potential failure modes such as the kill cord breaking before it trips!
That's right but bear in mind that any "passive" system YOU don't need to activate instils confidence that may be misplaced if it doesn't work or is ineffective.
Quote:
So, what are the other options? Engine technology is certainly very advanced but we still have what is basically a microswitch opening a circuit to kill the engine.
actually they normally close the switch to kill the engine.
Quote:
One option would be to sense that the driver is in his seat. You may have this in your front passenger seat in your car. It can be done several ways, such as weight sensing or ultrasonic sensing and it deactivates the airbag is there is no on in the seat. I am sure the car companies pay peanuts for the sensors.
been discussed
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Or how about a system that detects an engine on full lock for a period of time?
so it only works if the engine is full lock. Meanwhile people get run over or boats 'run away' through a group of swimmers!

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Or to detect if the hand is off the throttle for more than a short period. That would also make you keep your hand on the throttle!
oh oh oh can we push a button every minute to confirm we are still alive too?

Quote:
Our cars are full of sensors, why not take some technology to make sure you CAN'T be run over?
car sensors aren't very long lives even without adding salt water and neglect.

Quote:
Any more ideas?
there's pages of them...
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Old 23 May 2013, 14:33   #125
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I use the autothether system on a willard 7m disel rib. I really think it is a good system. I go out alone in the winter in Or and falling overboard would definetly be deadly, especially if the boat did not stop.

Most doesels have no overboard kill system at all. You can however rig one up to your fuel solenoid. The way my autotether is setup, it mecahnically flips a cole hersee overboard switch. This switch can also be used with a normal lanyard, so you have both options and would never be without, say if the autotether needed new batteries or something.

A lot of people on this thread poo pooing wireless overboard devices as possibly unreliable however, i think they are a lot safer than the mechanical ones. At least you can keep them active when walking around the boat. The lanyards are off and on a lot and then people get sick of clipping them and leave them off.

Heres a thread on hoe tomrig it for a cummins 6bt diesel.

http://boatdiesel.com/Forums/index.c...=0&Forum_ID=37
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Old 23 May 2013, 14:47   #126
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Willk....you mentioned keeping "numpties" away from boats and indeed keeping them on the beach.

One question,

How do you identify the "numpties"? (testing and licensing to prove their numptiness I guess)

Or a card that non-numpties carry around to keep them off the beach and in boats?
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Old 23 May 2013, 14:53   #127
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A lot of people on this thread poo pooing wireless overboard devices as possibly unreliable however, i think they are a lot safer than the mechanical ones. At least you can keep them active when walking around the boat. The lanyards are off and on a lot and then people get sick of clipping them and leave them off.
It's fair to say I've been "poo pooing" wireless overboard devices in the context of a leisure market primary safety system in a marine environment. I still believe there to be too many drawbacks in the stability, reliability and durability of wireless systems for that type of application. Your point of single handed operation in a larger open boat is well made: however, I would need significant convincing that a relatively complex wireless electronic device is safer - in the broadest sense of the word - than a piece of string with a clip at each end.

I notice you mention your wireless system also has a backup of a piece of string with a clip at each end. I wonder why? ;-)
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Old 23 May 2013, 14:55   #128
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Quote:
Originally Posted by mister p View Post
Willk....you mentioned keeping "numpties" away from boats and indeed keeping them on the beach.

One question,

How do you identify the "numpties"? (testing and licensing to prove their numptiness I guess)

Or a card that non-numpties carry around to keep them off the beach and in boats?
that's easy, a numpty always knows the best way of doing whatever it is you are doing, but has never actually done it
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Old 23 May 2013, 15:07   #129
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@leapy if you use that piece of string religiously and never unclip it or move about the boat when its in gear then i agree the piece of string is safer.

In a small boat where there is nowhere to go, yeah the string makes sense. In a larger open boat, could be trolling and need to adjust something at the back of the boat. Larger boats might even be on autopilot etc. the wireless systems have their place. The design of the autotether is good. If the connection is lost betwen the fob and base, the system triggers. If the battery gets below a certain level there is an alarm and eventually it triggers. You could even use both it and a string when you are at the helm. You can use multiple fobs for helm and crew and decide whether you want the crew fob to sound overboard alarm instead of stopping the engine.

Lets face it the weakest link in any of these systems is human.
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Old 23 May 2013, 15:12   #130
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Lets face it the weakest link in any of these systems is human.
Ain't that the truth
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