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Old 09-08-2013, 07:34   #1
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What's the Gubbins on the Front X Beam For?

In this image there is some structure on the front x beam. Exactly what purpose does it serve ?

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Old 09-08-2013, 07:50   #2
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Re: what's the gubbins on the front x beam for?

Have no idea what you are talking about?

The cross beam is called a sea gull striker(because it goes up).
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Old 09-08-2013, 08:47   #3
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Re: what's the gubbins on the front x beam for?

Think suspension bridge. It makes an otherwise bendy beam stiffer in one axis.
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Old 09-08-2013, 09:24   #4
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Re: what's the gubbins on the front x beam for?

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Originally Posted by Cotemar View Post
The cross beam is called a sea gull striker(because it goes up).
In the Lagoon manual it's called a Dolphin Striker (because it pulls down??)

Anyway, as Roy M said, it stiffens the beam. The forestay is trying to pull the forebeam upwards, while that structure resists the beam bending and distributes the load to the outer mounting points. Without it, the beam would not have enough strength, and would just bend and ultimately break.
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Old 09-08-2013, 09:45   #5
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Re: What's the Gubbins on the Front X Beam For?

Think in terms of what a mast spreader does... it keeps the beam from bending...
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Old 09-08-2013, 10:10   #6
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Re: what's the gubbins on the front x beam for?

Quote:
Originally Posted by Wanderlust View Post
In the Lagoon manual it's called a Dolphin Striker (because it pulls down??)

Anyway, as Roy M said, it stiffens the beam. The forestay is trying to pull the forebeam upwards, while that structure resists the beam bending and distributes the load to the outer mounting points. Without it, the beam would not have enough strength, and would just bend and ultimately break.
Maybe these pictures will help. Sea gull striker is upward into the sky

sea gull striker - Google Search
----------------------------------------------
Dolphin Striker is downward into the water

dolphin striker - Google Search
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Old 09-08-2013, 15:41   #7
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Re: What's the Gubbins on the Front X Beam For?

The A frame and bridle convert the upward bending load, imposed by the forestay, into a compression load along the beam. The compression load can be handled by a much smaller section beam than the bending load could be.
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Old 10-08-2013, 01:48   #8
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Re: What's the Gubbins on the Front X Beam For?

OK got it - thanks everyone for your replies.
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Old 10-08-2013, 04:32   #9
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Re: What's the Gubbins on the Front X Beam For?

and all these years i thought it was the "sights" for mowing down jet ski's
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Old 10-08-2013, 05:37   #10
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Re: What's the Gubbins on the Front X Beam For?

No, atoll, THIS is how we get rid of jet-skis

The Ultimate PWC Repellent
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Old 10-08-2013, 06:13   #11
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Re: What's the Gubbins on the Front X Beam For?

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Originally Posted by tamicatana View Post
No, atoll, THIS is how we get rid of jet-skis

The Ultimate PWC Repellent

Excellent!!!
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Old 10-08-2013, 06:21   #12
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Excellent!!!
+1
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Old 10-08-2013, 07:22   #13
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Re: What's the Gubbins on the Front X Beam For?

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+1
Ditto
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Old 10-08-2013, 07:50   #14
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Re: What's the Gubbins on the Front X Beam For?

Quote:
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No, atoll, THIS is how we get rid of jet-skis

The Ultimate PWC Repellent
i want one!
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