where is the center of gravity on a Catalina 30.

[nlneilson]

where is the center of gravity on a Catalina 30.
In front or in back of the mast and by how much.

A dimension forward of the transom or is it specified from the bow ????

 

[Anonymous 121765]

NL,

I can only speak for my 1980 C30.

I did not see your year make of boat but, I can only offer you this.
On my boat the past 30 years, My center of gravity is somewhere aft of the fin keel to the fuel tank.
This I believe is the lowest gaging point for COG.

There is also a difference of STBD/PORT weight imbalance. Not much, but because of the cabin layout & weight differences, my boat likes to lean alittle to port. Filling all the tanks & seeing the waterline while floating neutral, yea, it leans a little bit.

This has never been a problem but still, I noticed it. I would suggest your profile include year made etc. as the guys on this site will be able to lend better helpful advice having more info.

Remember, knowledge is power & power is what you make of it.

CR

 

[nlneilson]

Thanks Captnron
I have a 79 tall rig #1249

I have a three axle trailer and I am concerned only with CG of the C30 for and aft so I can place the boat CG slightly forward of the center axle to control the tongue weight of the trailer on my trailer hitch. Not critical at first, 1,200 to 1,600 lbs should be OK and then adjust from there. Just moving from dry storage to the launching ramp, just across the street and through the parking lot.

From your post "aft of the fin keel"

The jpg image attached shows how the boat is sitting on the trailer now. The piece of plywood standing up is just where I guessed the CG would be , approx 8 to 10 inches aft of the forward bottom edge of the keel. The 4X4 is sitting on the center axle. It seems like the boat is too far forward on the trailer now.

The drawing of the shipping cradle isn't much help finding the CG.
http://www.catalina30.com/techlib/Hull/C 30 Fin Keel Cradle.jpg
Any additional help will be appreciated.

Neil

 

[Anonymous 121765]

NL,

Your position on the trailer should be fine pal. It's a short move & I assume there are no hills to be traversed.
I wouldn't worry, you will be fine.

What I did like, was your questioning beforehand, just to be sure.

CR.

 

[CloudDiver]

Like Cap'n Ron said, with such a short move you won't experience an ill effects even if the CG were too far back. Wobble typically manifests above 45 mph when the tongue load is too light.
Judging from your picture, even though I can't see the whole rig, you have it as far forward as it can go and that is great... you seem to have the ideal position even if you were going to trailer at highway speed. Also judging from what I can see in the pic, you did a really great job setting up the rig with safety in mid; well done.

 

[nlneilson]

Like Cap'n Ron said, with such a short move you won't experience an ill effects even if the CG were too far back. Wobble typically manifests above 45 mph when the tongue load is too light.
Judging from your picture, even though I can't see the whole rig, you have it as far forward as it can go and that is great... you seem to have the ideal position even if you were going to trailer at highway speed. Also judging from what I can see in the pic, you did a really great job setting up the rig with safety in mind; well done.

Thanks CloudDiver,
Safety is a high priority for what I do. When I get the boat off I will be getting more braces welded on. Someone complained it looked unsafe and because I have stepped on some toes my lease for dry storage has been terminated.

 

[LakeMurraySailor]

Hi NL, I've read this thread twice, you've got to love a guy that sticks to his guns no matter what! People are funny, sailboats are just fun and have nothing to do with politics or personalities. My AH sister had me blackballed from a yacht club here on Lake Murray in SC because she was mad at me and you just deal with it! Low-life people are everywhere. The club hosted a regatta not long after and I signed up for it, yes it was an "in your face" move but I felt much better afterwards. So good luck finding a spot for your boat because I can't imagine using a Catalina 30 as a trailer sailboat would be a lot of fun.

 

[Anonymous 121765]

These are reasons why I don't keep my boat at a marina.

I just don't have that "I'm a member & these are the rules" mindset.
This is also why I would never live in a condo complex with their Commie-type association rules.
Many boaters in my area rent private slips & it works well for most.
I've rented a total of 2 private slips since 1990 & I'm only 5 minutes from the Gulf in a protected bayou.

Maybe your area has private slips for rent. I would inquire. You'll put up with less aggravation.

CR

 

[LakeMurraySailor]

CR, you hit that one on the head! Individually most of the people at the "blue blazer" clubs are okay but collectively they are AHs. My club's only rule is there aren't any rules. Everybody there treats others with respect! Dogs, live-aboards are allowed and we're all friends. It works and I like it. I refer to it as the "Bohemian YC"!

 

[All U Get]

When we had the Catalina 30 the center of gravity must have been the top of the mast because we always had the rail in the water. What a ride.

All U Get

 

[CloudDiver]

These are reasons why I don't keep my boat at a marina.

I just don't have that "I'm a member & these are the rules" mindset.
This is also why I would never live in a condo complex with their Commie-type association rules.
Many boaters in my area rent private slips & it works well for most.
I've rented a total of 2 private slips since 1990 & I'm only 5 minutes from the Gulf in a protected bayou.

Maybe your area has private slips for rent. I would inquire. You'll put up with less aggravation.

CR

I'm with you CR, I'll never have another property with an HOA. Luckily, my current house does not have one which is one of the biggest positive selling points. Ideally, someday I'd like to live more 'country' so I can build a big workshop that looks like a barn from the outside (just the face style for cammo) that is really a boathouse. 16 x 20 roll up door and 24 x 48 minimum floor space, 30 x 60 would be ideal. I don't even need a 'farm' or 'ranch', just two acres on a somewhat level grade would do it. Very hard to find in SoCal until you get an hour or more commute distance from work.

 

[Rick D]

Well, you certainly got the port officials panties in a bunch. From the sounds of things, you seem to know how to maneuver your way around the bureaucracy, so I assume you have just decided it isn't worth it. I also assume there are plenty of private slips available in your location. Good luck on your decision and move.

 

[chrisings]

Politics sure are becoming a "full contact sport" these days. Anyway, I'd like to get back to something CR said, and sorry to hijack the thread, our C 30 also lists to port. I thought it odd since our batteries and fresh water tank (usually full) are on the starboard side. The boat has a noticeable list to port. Not a big deal, just, well, odd.

 

[The Garbone]

Our C-27 had a 5 degree port list no matter what I did, seemed to give me a little closer angle on the port tack.