Bow stops and winch posts

bonz_d

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1st I'm going to start by stating that I hope we can have a civil discussion on this topic. I will state some observations and opinions that are my own and if you disagree say so but please also give a reason why you disagree and not just because that's the way it should be.

Over the past few weeks I've seen many posts here regarding bow stops and winch posts. Many asking questions about their trailers and including pictures to which I see many replies that just state the the bow stop needs to be under the bow eye and give no explaination as to why.

Many of the pictures I see posted are of older trailer with winch posts as old as the trailers. Many of these posts were built back when it was common practice to have the eye above the winch. Where the winch mount was placed at the top of the post or on a post mount that also held the bow stop at the end of it making it impossible to get the boweye under the stop. In these instances what is that person to do? Take an old trailer and spend a hundred or so dollars on a winch post just so they can get the eye under the stop? Replace the trailer?

Now just to be clear with everyone, I do agree it is best to have the stop under the boweye as it does add a level of saftey but by no means is it an absolute end all and gaurantee the the boat is not going to move or come off the trailer in a high speed panic stop, especially when I see so many of these trailer that do not even have brakes on them. In many of the pictures I see posted I have to wonder if the winch post will stay in place if a panic stop is incountered.

It is my opinion that we as a group are trailering bigger and bigger boats every year. As the loads get heavier more precautions need to be taken and the way we secure them needs more attention. It is also just my opinion that if a boat on a trailer is moving around on it then it has not been properly secured no matter how larger of small the boat is.

Now in my case yes I have a small boat on a lightweight trailer. Am I really concerned where the bowstop is. NO. I have had my boat on the trailer, which strap attached, saftey chain attached and a gunwale strap across the midship and have been able to raise the tongue of the trailer until the stern of the boat was touching the ground and the boat moved not one inch. Boat attached to the trailer the same way I have been down potholed filled gravel roads and again the boat has not moved on the trailer.

And you are all right that I would not try this with a 5000# boat! But again, when I was young and all the large boats were built of planks or ribs and plywood they were carried on a flatbed type trailer on cradles and there were no bowstops at all.

So what is the answer or how do we answer these people with these older trailers with the winch mounted at the top of the post and can not be adjusted? Do we just tell then that the eye needs to be under the bowstop and leave it at that? Or them them their trailer is junk and they need a new one? What?
 

JB

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Re: Bow stops and winch posts

If you prepare a safety chain with turnbuckle to firmly secure the boat to the trailer frame from the bow eye all of the arguments about winches, winch posts and bow eyes are irrelevant.
 

bonz_d

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Re: Bow stops and winch posts

JB, I can agree with that. So what would you say if there was no safety chain? What suggestion would you give some one.
 

roscoe

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Re: Bow stops and winch posts

JB, I can agree with that. So what would you say if there was no safety chain? What suggestion would you give some one.

Add a safety chain. You need one to be legal anyway.
 

bonz_d

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Re: Bow stops and winch posts

So why do you think that so much is made out of the position of the bow stop?
 

UncleWillie

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Re: Bow stops and winch posts

If it is an old Trailer with a bow eye above the Bow stop I would recommend getting it under the bow stop if possible without too much trouble.
If it has been above the bow stop for the last 15+ years and the boat has stayed on the trailer in all that time, why get all excited about it now?

It is like worrying about getting hit by lightning, or bitten by a shark.
Sure it happens, And people also win the Mega Millions lottery, but I wouldn't anticipate any of these things happening to anyone in particular.

What keeps a boat from moving forward is Friction on a bunk trailer and the bow stop if on rollers.

Imaging your trailer with the winch post and bow stop missing.
The stern straps are pulling down and/or Forward.
The Bow Safety chain is pulling Down and/or Forward.
Was there anything holding it Back that wasn't part of the Winch post?
 

Silvertip

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Re: Bow stops and winch posts

Here is one example of what happens when a boat is not properly secured. Just how "unsecured" this boat was when this happened is not known but one can make some observations. 1) no stern tie downs. 2) a side-to-side strap does not stop forward motion. 3) No safety chain and winch strap above or below the bow stop would likely not stop this load either. Breaking strength on the winch strap is about 2000# which this boat is obviously heavier than that. Coupled with mass x velocity = much more force than the strap alone can tolerate. A stout safety chain would have eliminated or at least limited forward movement of the boat. 4) This incident was obviously not a rear end deal since there appears to be no damage to the truck. 5) What is very likely is that two outdrives are in need of replacement not to mention repair of the hull and the bed of the truck. 6) Whatever method you use to secure the boat, it is better than nothing at all. As far as keeping a boat on a trailer it doesn't matter how light or how heavy it is. In an emergency move an object in motion tends to stay in motion (as taught in Physics 101) so fore-aft movement is done with winch strap, safety chain, and stern tie downs. A side-to-side strap helps hold the boat on the trailer but does little for fore-aft movement. Ideally, with the bow eye and/or the strap "under" the bow eye means the boat cannot be launched over the bow stop. The force would not likely break the hook or the strap since the forces are upward not a straight pull as it would be with the bow eye and strap over the stop.

Trailleroops.jpg
 

bonz_d

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Re: Bow stops and winch posts

Imaging your trailer with the winch post and bow stop missing.
The stern straps are pulling down and/or Forward.
The Bow Safety chain is pulling Down and/or Forward.
Was there anything holding it Back that wasn't part of the Winch post?

A little different angle to this.
One trailered boat @ 5000#
One trailered boat @500#
Both panic stop @ 60 mph, which bow stop is going to have a better chance of holding the weight/momentum? Even add that we hope the 5000# rig has breaks.
 

bonz_d

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Re: Bow stops and winch posts

Silvertip I've seen this photo many times before though I've never seen posted an explaination for it.

I think your #3 reason speaks volumes. In the photo I cannot make out any bow stop/winch post but even if were there it surely looks as if it failed. Add to it that in the photo the trailer looks to be a bunk trailer. How much force do you think it took to move that boat that far forward sliding on those bunks?
 

UncleWillie

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Re: Bow stops and winch posts

... which bow stop is going to have a better chance of holding the weight/momentum?...

The 500# Trailer has a 2x2" winch post, and the 5000# Trailer has a 4x4" post.
If they are designed correctly it will be a toss up.

You pay your money and take your chances.
If you are buying a 20 year old boat, you should know you are not buying the latest and the greatest.
Buying older equipment that may have design flaws that were not known at the time is why the price is so low now.
The best you can do is to educate of the risks so that they can make an Informed Decision.
 

bonz_d

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Re: Bow stops and winch posts

The 500# Trailer has a 2x2" winch post, and the 5000# Trailer has a 4x4" post.
If they are designed correctly it will be a toss up.

You pay your money and take your chances.
If you are buying a 20 year old boat, you should know you are not buying the latest and the greatest.
Buying older equipment that may have design flaws that were not known at the time is why the price is so low now.
The best you can do is to educate of the risks so that they can make an Informed Decision.

From my point of view this is part of the problem that I've seen posted with photos of some pretty cheezy winch posts on both larger and smaller boats. Some even relatively new. As to "old" My Lund is just short of 30 years old and it is still basically the same hull they are building today. Also I have a small Gator trailer under a rowboat that was built in the 60s and it is much sturdier than some of the new stuff I see in the same weight range. So old is not always a given either.
 

wlg

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Re: Bow stops and winch posts

How close to the bow stop should the eye be? Should it be touching? I had to get a new to me trailer and it's all set up except the eye is about six inches under the stop.

I'm not trying to hijack this thread. I have been trying to find an answer by reading exactly what this thread is about. Seems a good place to ask.

Thanks, Bill
 

UncleWillie

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Re: Bow stops and winch posts

How close to the bow stop should the eye be? Should it be touching?...

Think about your question. :confused:

If you are trying to keep the boat from sliding forward during a hard deceleration event, why would you want to give it a 6 inch head start before in slams into the Bow roller? :D
 

countryboy26047

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May 25, 2012
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Re: Bow stops and winch posts

Bonz, I was glad to see you started this thread since, as you know, my trailer set-up recently 'came under fire'. It's good seeing varying opinions on this. Now, Bonz already know's my set-up, and my 'feeling' on this. For those that don't, I have a '75 16' tri-hull sitting on a '75 tilt style trailer. My setup currently (from factory) has the bow eye above the stop. While I realize that it is pretty unanimous that it is safer to have the eye below the stop, however my answer to this is

A) My normal trip is only about 3 miles from home to launch, never seeing over 35mph. In this case, I use 10k lb ratchet straps I use on the transom that I ALWAYS make sure are firmly secured before I ever drop the tongue on the ball (no pun intended lol). I firmly believe that if I came to that sudden stop, that boat would run down the bowstop long before those 10k lb straps will let it go that far forward if they weren't there.

B) This idea I have just recently came up with.. On my trailer frame, centered with the keel, there is a bracket that sits about maybe a foot farther back than the bow eye. I plan on getting a grade 5 hardened bolt to put through this bracket, and use a 3rd 10k lb strap to go from the bow eye to the bolt. Only way that boat is gonna run over my tow vehicle, is if the trailer itself goes airborn! haha
 

Silvertip

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Re: Bow stops and winch posts

A little different angle to this.
One trailered boat @ 5000#
One trailered boat @500#
Both panic stop @ 60 mph, which bow stop is going to have a better chance of holding the weight/momentum? Even add that we hope the 5000# rig has breaks.

I've seen some pretty flimsy winch posts on trailers for 500# boats. Those two examples mean nothing since the 500# trailer would be built for that size boat.
 

Silvertip

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Re: Bow stops and winch posts

The ignored part of this discussion is the bow eye itself. Whatever method you use to secure the bow, using the eye is only as secure as the capability of the eye. In a serious enough "sudden stop" the bow eye would probably rip out of the bow. Hence the importance of stern tie downs. Those eyes also have limited "holding" ability so this entire discussion become one of how much protection do you want, need, or can reasonably expect. You could use log chains to secure the boat but in a serious enough incident the boat would still run you over -- but you likely wouldn't care since you would be a grease spot on the highway. My brother in law had a near miss years ago where the trailer tongue was pushed through the back window of a Bronco in which he was a back seat passenger. While slowing to make a turn they were rear ended by a gravel truck. The truck hit the back of the boat, broke the hitch and sent the tongue and dangling parts directly between the two back seat passengers. Boat was totaled, engine was totaled, trailer was totaled and the two back seat occupants needed clean underwear. In this case the boat was well secured and the bigger parts did not leave the trailer although there were lots of small bits laying about.
 

countryboy26047

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Re: Bow stops and winch posts

Very good, and valid point silvertip. Glad to hear everyone was 'ok' after that accident also.
 

halfmoa

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Re: Bow stops and winch posts

The ignored part of this discussion is the bow eye itself. Whatever method you use to secure the bow, using the eye is only as secure as the capability of the eye.

This is why I wince every time I see a 6000 lb boat being winched up a trailer with the bunks completely out of the water. That's a shirtload of stress on that little eye and the material surrounding it.
 

UncleWillie

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Re: Bow stops and winch posts

This is why I wince every time I see a 6000 lb boat being winched up a trailer with the bunks completely out of the water. That's a shirtload of stress on that little eye and the material surrounding it.

The coefficient of friction between the Hull and the bunk carpet is relatively small.
Think how well carpet sliders let the Admiral move the entertainment center around the living room!
That is why you can winch it up by hand.

Even with a 10:1 winch, if you can muster 50 lbs of force with your hands, the winch is only pulling 500 lbs up the bunks.
You are grunting like you are going to die but the bow eye is well within its limits.
You could hang the boat from a properly installed bow eye.

The problem is in a crash where the forces hit many G's.
Now the Bow Eye is being stressed with 20,000+ lbs of force and that is what will do it in.

The point is still valid. The Bow eye is likely the weak link in the crash scenario.
 

bonz_d

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Re: Bow stops and winch posts

I've seen some pretty flimsy winch posts on trailers for 500# boats. Those two examples mean nothing since the 500# trailer would be built for that size boat.

No doubt, and it goes both ways. The point I was trying to make was the inertia of the 2 once they started moving. Which would be harder to get started moving and which would be harder to stop once it began moving.

Your next post much more eloquently exspressed one of the thoughts I was having on this subject. Well done! Would also like to add the bow stop mount to this example also as many I see look as though they would collapse or fold up from the pressure of the eye bolt pushing up on them.

With my smaller lighter boat I myself am not as concerned with the boat coming over the trailer as I am with the boat coming completely off the trailer and into oncoming traffic in the case of an accident..

Still the question remains. What would you tell someone that has an older boat with an older trailer were the winch is mounted at the top and there is no way to get the stop above it?
 
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