Transom & Keel?

**AirTool** · 03-19-2009, 11:21 PM

RE: Transom & Keel?

The transom is identified only by 1.

Keep? I think you mean keel and keel is not indicated in the sketch. Your markers are aft to forward. The keel generally runs bow to stern and at the bottom of the structure.

AirTool

**Trevorg7** · 03-19-2009, 11:31 PM

RE: Transom & Keel?

Agree with AirTool but will add the keel usually runs bow to stern on the center line.

T

**hornsfan** · 03-19-2009, 11:36 PM

RE: Transom & Keel?

Correct, I meant keel. The reason I'm asking is cause I think when we built our boat house boat lift (cradle style) I think we may have made the cradle beams too long. The website states "Place the rear sling or cradle beam within 2 feet of the transom since that's where most of your weight is. The front sling or cradle beam should be under the keel, not under the slope of the bow. You might want to adjust the cable so that if water gets in your boat it will drain easily."

I will more than likely need to cut the cradle beams shorter but i'm trying to find out according to the site, where the end of the cradle beams should fall.

Also for anyone that has this type of lift if you could post pics as a reference point. As well as how close they are.

Thanks

**AirTool** · 03-19-2009, 11:58 PM

Re: RE: Transom & Keel?

Originally posted by Trevorg7

Agree with AirTool but will add the keel usually runs bow to stern on the center line.

T

Agree as long as there is a bow, stern, and centerline structure as in the case of a ski boat. In the case of a barge, TLP, spar, round-ship, and others...the keel is a plate at the bottom and the structure is usually called scantling.

For the picture above, you are exactly right.

Originally posted by hornsfan

The website states "Place the rear sling or cradle beam within 2 feet of the transom since that's where most of your weight is.
Thanks

Yes of that is where the engine is.

It mentions slings and cradle beams....can you post a picture of what you are trying to do and tell us what boat you have?

AirTool

**hornsfan** · 03-20-2009, 12:07 AM

Re: RE: Transom & Keel?

Originally posted by hornsfan

The website states "Place the rear sling or cradle beam within 2 feet of the transom since that's where most of your weight is.
Thanks

Yes of that is where the engine is.

It mentions slings and cradle beams....can you post a picture of what you are trying to do and tell us what boat you have?

AirTool[/quote]

I have a 1999 Air, I'm trying to figure out exactly how long my boat lift cradle beams are suppose to be and where they should sit underneath the boat. I currently think the beams are probably too long so I'm trying to find out how much shorterI need to cut them.

**AirTool** · 03-20-2009, 01:09 AM

RE: Re: RE: Transom & Keel?

Nice boat.

Your engine is not in the rear by the way. You do have fuel under the rear seat which can weigh about 200 lbs. The engine is much heavier.

Your setup looks good in my opinion and I see no need to cut those beams shorter in the front. For that hull, the support should be similar to your wishbone trailer and the cg is slightly in front of the single axle. I would try to figure out if the tension in the slings is equal forward and aft. Maybe pluck them like big guitar strings and see if the tension is similar or obviously different.

What happens if you walk to the bow....does the boat rock forward?

Does the water in the bilge drain to the center drain plug / pump?

I'm not sure what can be adjusted here but I would think the boat could go forward some and trim the beams off at the stern. Doing this the bow would hit so probably too late to move the lift aft.

AirTool

**DavidF** · 03-20-2009, 08:08 AM

RE: Re: RE: Transom & Keel?

I think what was being asked is where to place the cradles. I suggest positions 3 and 5 (or even a bit more toward stern than 5)

**hornsfan** · 03-20-2009, 09:08 AM

Re: RE: Re: RE: Transom & Keel?

My main concern with figuring out if the cradles are too long in the back is cause as of now, the prop and rudder actually are sitting in between the cradles. I would think for protection from your prop and rudder from hitting either the left wooden cradle or right wooden cradle that they prop and rudder should be outside of the cradle. (see picture below)

**AirTool** · 03-20-2009, 11:30 AM

Re: RE: Re: RE: Transom & Keel?

Originally posted by DavidF

I think what was being asked is where to place the cradles. I suggest positions 3 and 5 (or even a bit more toward stern than 5)

Agree...That's also what I've been referring to in addition to beam length. But I don't know if he still has the flexibility to change that any more. Is it adjustable? The lift is installed and the bow is about to hit the dock.

Originally posted by hornsfan

My main concern with figuring out if the cradles are too long in the back is cause as of now, the prop and rudder actually are sitting in between the cradles. I would think for protection from your prop and rudder from hitting either the left wooden cradle or right wooden cradle that they prop and rudder should be outside of the cradle. (see picture below)

I think you need the beams to go all the way to the stern just like a trailer does. The port/starboard position of the beams should straighten the boat out to prevent the prop from hitting. Somebody that hangs their boat will need to comment on loading. I haven't done it. But I would want as much of the fiberglass being supported as I could get.

AirTool

**MyWakeIsBigger** · 03-20-2009, 11:46 AM

RE: Re: RE: Re: RE: Transom & Keel?

On our lift we have the front cable right and the point of where the tower is mounted. the end of the boat hangs of the back of the 2 by 12's probaly about 3 foot. we never have a problem with it rocking or anything.

**hornsfan** · 03-20-2009, 11:49 AM

RE: Re: RE: Re: RE: Transom & Keel?

mywakeisbigger, i think the front of my 2x12 is where it needs to be the concerns was mainly the back of the 2x12, being too long as you can see from the my image.

**MyWakeIsBigger** · 03-20-2009, 11:51 AM

RE: Re: RE: Re: RE: Transom & Keel?

Right. all you need to do is keep the boat in the same spot but i would say cut off maybe 2 foot and your golden.

**bkhallpass** · 03-20-2009, 11:54 AM

RE: Re: RE: Re: RE: Transom & Keel?

Why would you cut it off the bunk? It's hurting nothing, and provides extra support and stability.

BKH

**MyWakeIsBigger** · 03-20-2009, 11:56 AM

Re: RE: Re: RE: Re: RE: Transom & Keel?

Originally posted by bkhallpass

Why would you cut it off. It's hurting nothings, and provides extra support and stability.

BKH

I would cut it off becuase the boat is sitting perfect on the lift. It shouldnt go anymore forward. He should cut if off so that the prop will not hit the board.

Transom & Keel?

Transom & Keel?

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