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Old 13 February 2013, 16:54   #1
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Towing Water Skiers from A-Frame?

Whats the general consensus? Would you guys feel comfortable towing a water skier from your A-frame? i've been doing it and it seems to be ok, as the Tornado comes with a pretty damn robust double a-frame, which seems well secured to the deck and transom. But a friend of mine with a RIB thinks its awful that i do it!

Si
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Old 13 February 2013, 17:38   #2
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Depends on the boat and frame. If it has the "ring and peg" fitting it should be fine.
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Old 13 February 2013, 17:45   #3
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If the frame is designed to tow with yes. If not NO! The forces generated can be incredible, and it is a shock load.

Notice the width between the tower legs. Also these have plates underneath the gunnels to spread the load out, and I have seen many boats crack at the tower mounts.


NEVER tow a tube aka ringo from any tower.
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Old 13 February 2013, 17:59   #4
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Quote:
Originally Posted by Peter_C View Post

NEVER tow a tube aka ringo from any tower.
Why??
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Old 13 February 2013, 18:15   #5
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Surely towing from the transom will load the transom more than towing from an a frame that's bolted to the transom and the hull?
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Old 13 February 2013, 18:30   #6
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The forces generated from a tube are much higher than even a heavy wakeboarder. There isn't a single tower manufacturer, nor boat builder, that approves towing a tube from the tower.

Read these for specific references of damage.
WakeWorld Discussion Board: towing tube from tower

Bought a boat with a wakeboard tower- can I tow a tube?

Do you tow a tube with your tower?

Where do you tube from? - TeamTalk
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Old 13 February 2013, 18:46   #7
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Thanks, makes sense re the submarining. I have not used the tube yet so don't have experience of how it differs to waterskiing. Are we agreed that waterskiing is ok of the a frame though or should that really be off the transom too?
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Old 14 February 2013, 07:32   #8
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Quote:
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Surely towing from the transom will load the transom more than towing from an a frame that's bolted to the transom and the hull?
Towing from the transom will directly load the transon its-self, and put a relatively small bending moment on the transom. If you tow from a standard A-frame, the distance from transom to the applied force if much greater and hence so is the bending moment. If you look at the a-frame photo shown you will eventually see that the front legs reach as far forward as the frame is high. This distributes the load over the much larger area of boat and thus reduces the stress considerably.

Hope that makes sence!

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Old 14 February 2013, 08:16   #9
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the frame acts as a great big lever
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Old 14 February 2013, 08:20   #10
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So should water skis also be towed from the transom?
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