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1/10 of a knot #231862
05/04/11 06:45 AM
05/04/11 06:45 AM
Joined: Jan 2009
Posts: 5,525
pgp Offline OP
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pgp  Offline OP
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What would it take to improve my boat speed by that much?

Take into consideration my boat is five years old. A reduced pork chop diet is out of the question!

Last edited by pgp; 05/04/11 06:46 AM.

Pete Pollard
Blade 702

'When you have a lot of things to do, it's best to get your nap out of the way first.

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Re: 1/10 of a knot [Re: pgp] #231863
05/04/11 06:50 AM
05/04/11 06:50 AM
Joined: Aug 2007
Posts: 118
Pensacola, FL
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Cab Offline
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Pensacola, FL
Fill the dings/scratches that are on the bottom of all our boats and wax it a few times.


Chris
Trident F16
Re: 1/10 of a knot [Re: Cab] #231865
05/04/11 07:01 AM
05/04/11 07:01 AM
Joined: Jan 2009
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pgp Offline OP
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I'm not so sure about the wax. But, is it really that easy to pick up 1/10?

Last edited by pgp; 05/04/11 07:03 AM.

Pete Pollard
Blade 702

'When you have a lot of things to do, it's best to get your nap out of the way first.

Re: 1/10 of a knot [Re: pgp] #231866
05/04/11 07:20 AM
05/04/11 07:20 AM
Joined: Jan 2005
Posts: 6,049
Sebring, Florida.
Timbo Offline
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Why are you not so sure about the wax?

No fan of simple physics?

Go get Frank Bethwaite's book, High Performance Sailing. In it he lays out exactly what a dirty hull will cost you in speed, and it's a lot more than 1/10th of a knot.

http://www.amazon.com/High-Performa...mp;s=books&qid=1304511678&sr=1-1

Read some of the reviews...if you race sailboats but don't own this book, well, it would be money well spent.


Blade F16
#777
Re: 1/10 of a knot [Re: Timbo] #231871
05/04/11 07:37 AM
05/04/11 07:37 AM
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pgp Offline OP
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Way back when, I'd heard that since wax is soft any scratches in the wax itself are as bad as scratches to the boat.

I'll get the book. But in the mean time, if a clean fair hull is ultra important, what would you go to get it? Wet sand with 1000 grit then buff with rubbing compound seems like over kill though it looks nice.


Pete Pollard
Blade 702

'When you have a lot of things to do, it's best to get your nap out of the way first.

Re: 1/10 of a knot [Re: pgp] #231873
05/04/11 07:46 AM
05/04/11 07:46 AM
Joined: Jan 2005
Posts: 6,049
Sebring, Florida.
Timbo Offline
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Don't use soft wax, use Teflon. McLube makes the right stuff. http://www.mclubemarine.com/

But first I would take it to a professional racing boat shop and have them board sand it and re-gelcoat it. You don't want to do it by hand wtih a small block, it won't be fair enough. You need a longboard, and it's a "job".


Blade F16
#777
Re: 1/10 of a knot [Re: Timbo] #231876
05/04/11 07:58 AM
05/04/11 07:58 AM
Joined: Feb 2005
Posts: 4,118
Northfield Mn
Karl_Brogger Offline
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Put your pork chop laden weight where it belongs..... laugh


I'm boatless.
Re: 1/10 of a knot [Re: Karl_Brogger] #231878
05/04/11 08:09 AM
05/04/11 08:09 AM
Joined: Jan 2009
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pgp Offline OP
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Good morning sunshine!

So, what's your take on a fair hull? When does it become overkill?

Last edited by pgp; 05/04/11 08:09 AM.

Pete Pollard
Blade 702

'When you have a lot of things to do, it's best to get your nap out of the way first.

Re: 1/10 of a knot [Re: pgp] #231879
05/04/11 08:16 AM
05/04/11 08:16 AM
Joined: Feb 2007
Posts: 402
Punta Gorda, FL
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jkkartz1 Offline
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Punta Gorda, FL
There is a boat shop out on 771 near Port Charlotte's Gardens of Gulf Cove owned by a Russian? that does fairing for the Olympic Stars and other race boats. I was driving home from Englewood and saw a truck from Michigan pulling a Star with the best looking fiberglass I have ever seen

Probably expensive.

Re: 1/10 of a knot [Re: jkkartz1] #231881
05/04/11 08:33 AM
05/04/11 08:33 AM
Joined: Jan 2005
Posts: 6,049
Sebring, Florida.
Timbo Offline
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If you can't eat off the bottom, it's too dirty. I wash and wax my boat (and daggers and rudders) the day before I go to a regatta, then wash the hulls again when I arrive at the regatta, before I take it off the trailer.

Road grime picked up while trailering to the regatta is slow. In the book mentioned above Frank did drag tests of hulls that had been washed after trailering and not, it was very clear which were always faster.

Shall we talk about the dirt on the mast and sails now? Anyone know of a good aluminium polish? ;^)


Blade F16
#777
Re: 1/10 of a knot [Re: Timbo] #231885
05/04/11 08:46 AM
05/04/11 08:46 AM
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pgp Offline OP
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"...aluminium polish?" laugh I was thinking the same thing but not very seriously.

My boat is well past time for a good overhaul and I was wondering just how far to go. It is still a beach cat and the best finish in the world probably wouldn't survive the first launch/landing or even sand on the trailer cradles.



Pete Pollard
Blade 702

'When you have a lot of things to do, it's best to get your nap out of the way first.

Re: 1/10 of a knot [Re: pgp] #231888
05/04/11 09:09 AM
05/04/11 09:09 AM
Joined: Jan 2005
Posts: 6,049
Sebring, Florida.
Timbo Offline
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You don't 'drive it on' to the beach do you?

Yeah, that will -undo- all the board sanding, gelcoat and wax!

I stop in a foot of water and go get the wheels.


Blade F16
#777
Re: 1/10 of a knot [Re: Timbo] #231890
05/04/11 09:37 AM
05/04/11 09:37 AM
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Posts: 439
Memphis, TN
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mikeborden Offline
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There has been and always will be an argument for waxing or not waxing the boat because of boat speed.

My argument....
It keeps the nasty grim off and I don't have to wash it as often.

A sexy boat is a clean boat, which in turn looks fast!

Mike

Last edited by mikeborden; 05/04/11 09:37 AM.

Viper USA 132

1984 Hobie 18
Re: 1/10 of a knot [Re: Timbo] #231892
05/04/11 09:46 AM
05/04/11 09:46 AM
Joined: Jan 2009
Posts: 5,525
pgp Offline OP
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"...go get the wheels." That's fine when I have crew but a problem when I'm uni. Lately, I've had a mooring line to return to and that is very nice.

Mike: what kind of wax do you use?


Last edited by pgp; 05/04/11 09:48 AM.

Pete Pollard
Blade 702

'When you have a lot of things to do, it's best to get your nap out of the way first.

Re: 1/10 of a knot [Re: pgp] #231894
05/04/11 09:57 AM
05/04/11 09:57 AM
Joined: Jul 2007
Posts: 439
Memphis, TN
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I use the Mcguires cleaner wax from the local O'reily's. It waxes and it clean some stuff off of the hull. I also use that on my spin pole.

I have used the Holmekol and it's very nice, just a little expensive. smile

What I generally do is at the beginning of the year, I use the Holmekol for the "base" if you want to call it that, and the rest of the year use the McGuires.





Viper USA 132

1984 Hobie 18
Re: 1/10 of a knot [Re: pgp] #231897
05/04/11 10:40 AM
05/04/11 10:40 AM
Joined: Mar 2006
Posts: 1,246
Orlando, FL
tback Offline
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Originally Posted by pgp
"...go get the wheels." That's fine when I have crew but a problem when I'm uni.



Pete, when I sail uni i have a small anchor that I tie a line to with a milk jug as a buoy. After launhing the boat, I drop the anchor and tie off my wheels to it right out in the water. When I finish sailing I come in and sail right to my wheels.

BTW, sometimes you need to raise your sails on the water, if so, then you can tie off to the makeshift mooring buoy to do that.


USA 777
Re: 1/10 of a knot [Re: pgp] #231898
05/04/11 10:46 AM
05/04/11 10:46 AM

M
MarkMT
Unregistered
MarkMT
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Originally Posted by pgp
Lately, I've had a mooring line to return to and that is very nice.

With you on that. In case anyone is interested, I've found this to be a great help.

Re: 1/10 of a knot [Re: ] #231899
05/04/11 10:59 AM
05/04/11 10:59 AM
Joined: May 2003
Posts: 4,451
West coast of Norway
Rolf_Nilsen Offline

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West coast of Norway
1/10th of a knot out of your boat? Easy.. smile

Sail more, and get some qualified, honest, feedback on your sailing and what to improve.

Probably not the answer you wanted.

Re: 1/10 of a knot [Re: Rolf_Nilsen] #231901
05/04/11 11:43 AM
05/04/11 11:43 AM
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Posts: 5,525
pgp Offline OP
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I hear you Rolf. wink

For some reason, I find it is actually easier to raise and lower the main when the boat is on the water.


Pete Pollard
Blade 702

'When you have a lot of things to do, it's best to get your nap out of the way first.

Re: 1/10 of a knot [Re: pgp] #231904
05/04/11 01:08 PM
05/04/11 01:08 PM
Joined: Feb 2005
Posts: 4,118
Northfield Mn
Karl_Brogger Offline
Carpal Tunnel
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Northfield Mn
Originally Posted by pgp
Good morning sunshine!

So, what's your take on a fair hull? When does it become overkill?


I don't own boats long enough to scratch them any more. I'm with mike though, I just want it easy to clean and keep the brown stains at bay, (I should wax my underwear lol) I actually use the same exact wax. Smoother and straighter will be faster, that I do know. But as far as wax or not I couldn't tell you if it makes a difference.


I'm boatless.
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