Rhino linning the bottom

Gravydon · Post by **Gravydon** » Wed Dec 17, 2008 2:34 pm

Rhino linning the bottom of a 26m. what do you guys think about it, would it make the boat faster or slower.I think it would make the boat faster because of the air going under the boat. but dont Know about performance....What do you Guys think

Thanx.........

baldbaby2000 · Post by **baldbaby2000** » Wed Dec 17, 2008 2:58 pm

It would slow you down and then look ugly when it started to chip off.

Gravydon · Post by **Gravydon** » Wed Dec 17, 2008 3:05 pm

How would it chip off, I have in the bed of pickup and loaded alot of a gravel and rock in there and it is tuff, I dont know how it would slow the boat down racing boats go faster with air going under the boat....

Gravydon · Post by **Gravydon** » Wed Dec 17, 2008 4:31 pm

what i want to know is will it hurt the performance . I know rino lining is tuff and it would make the boat easier to clean the bottom when washing
But does anybody know how it would hurt the performance

Hardcrab · Post by **Hardcrab** » Wed Dec 17, 2008 4:49 pm

The Rhino linings I have seen in trucks have all been rough textured.
It would seem that this would cause added friction as the boat moved through the water, slowing the speed.
I don't see how cleaning would change for the better with a rougher surface either.

Perhaps it can be sprayed to a mirror finish, much like what is already there?

For air to "go under the boat", the boat has to be airborne, with no water drag at all.
Until then, water drag is the main ingredient slowing you down.
The smoother the better for any given shape or displacement, I'd guess.

Those monster unlimited hydroplanes do it all the time, but not with 50 hp.
Check to see if those hot rodders use the stuff to win races.

But, you can always try it out on your boat and let us know your outcome.

Gravydon · Post by **Gravydon** » Wed Dec 17, 2008 5:11 pm

Thanx Hardcrab.
I dont know that is why i am asking. I just thought that if the surfuse was rough insted of smooth that there would be less drag less friction and and the boat would go faster.
Looking for imput........

bubba · Post by **bubba** » Wed Dec 17, 2008 6:42 pm

I have bottom paint on my M and I am sure there are some boat waxes that would make an unpainted bottom faster.

Divecoz · Post by **Divecoz** » Wed Dec 17, 2008 8:08 pm

If Rhino was the answer it would be all over the boards and the Internet and every sailing publication. .
To go fast your bottom among other things,......... must be as smooth as glass. That in and of itself leaves out most anti fouling paint and Rhino.
Weight is most often not your friend and Rhino is heavy very heavy per ounce or gallon ...
It wont peel off in fact its a very big pain to get off..... it you need to remove a bolt that's covered with it. Most Body Shops are now aware of this and charge accordingly.
Waxing your boat to make it fast? Be careful not all wax is created for speed and MOST will actualy slow your boat down. . .
Do Not Use Car Wax on the bottom of your boat....
This works well IMHO www.auroramarine.com/aurora/catalog/11120/index.html

mallardjusted · Post by **mallardjusted** » Wed Dec 17, 2008 10:10 pm

I think I would have concerns over 1)how smooth it would be, 2)how much it would cost, 3)how much it would weigh, and 4) how well it would hold up to long periods in salt or brackish water

I had the INSIDE of my 17'x5' duckboat done with Linex, for $500. If I remember right, they said it added about 10 to 14 pounds. So if we're talking approx 26' x just under 8' for the Mac, seems like you'd be looking at $1100 - $1400 and 30 to 35 pounds. All the stuff I've seen has not been real "slick". But, probably the best thing to do is call the Rino and/or Linex manufacturers and pick their brain. They may have done it before and have some good feedback.

Gazmn · Post by **Gazmn** » Wed Dec 17, 2008 10:25 pm

Hey Gravy,

I also wouldn't recommend it. Hardcarb's reasoning is straight forward and spot on. Mind you, I did purchase a spray-on Rhino equivalent and was going to apply it along the keel as a keel guard. Instead, I just bought a keelGuard, and ran it from below the tow hook to the CB opening

Divecoz · Post by **Divecoz** » Thu Dec 18, 2008 7:02 am

Gazmn wrote:Hey Gravy,

I also wouldn't recommend it. Hardcarb's reasoning is straight forward and spot on. Mind you, I did purchase a spray-on Rhino equivalent and was going to apply it along the keel as a keel guard. Instead, I just bought a keelGuard, and ran it from below the tow hook to the CB opening

I too will add a Keel Guard when I finally get down to Florida Next week.
SOoooo Hey Gazman!!! How is the 90 HP E-Tec treating you?
What kind of speeds are you seeing? How much of a difference in the sailing attitude of your boat are you seeing?

Post by **Russ** » Thu Dec 18, 2008 8:44 am

Smooth = speed/less drag

Bumps are like thousands of tiny fingers in the water causing drag.
Pretend your boat is a sled on the snow. What goes faster, a smooth sled bottom or a bumpy one?

That's why racers go through great pains to polish the bottom as smooth as possible. America's cup racers haul the boats daily and polish them before each race.

My boat saw a substantial slow down after the season of slime built up on the bottom.

Gravydon · Post by **Gravydon** » Thu Dec 18, 2008 11:53 am

Thankyou for all the replys. I have learn something i thought it was a good idea but found out different, It makes sence smooth is the way to go. Rino liner would make it almost bullet prouff for the bottom if you hit something and that sounded good but dont want to slow the boat down....

Thanx...........

baldbaby2000 · Post by **baldbaby2000** » Thu Dec 18, 2008 4:59 pm

It is possible to make things faster by having something other than perfectly smooth, but I think it has to be designed carefully and only is effective under a certain set of conditions; speed in particular. I think a shark's skin is an example. Gel coat is very tough and resists scratching, I think after a while the relatively soft rhino coating would have a lot of scrathes.

Gazmn · Post by **Gazmn** » Thu Dec 18, 2008 7:12 pm

Hi Divecoz,

The E-tec is great. 1 key turn starting, easy winterizing. No problems Mon

But I have SOO much stuff hanging off of my boat that I'm a lot slower than other >50HP people and am Not a good barometer in terms of what to expect speed wise. I still can't break 20 mph let alone 24. I think my current middle of the season - boat loaded with Shtuff - speed is 18 @ WOT. That's hitting 5500 RPMS my max with a 13 3/4 x 11 SS or 13 x 11 4 blade aluminum.

I have ablative paint, a radar arch/bar made of 1" SS that also holds an 80W solar panel, a 1000w generator, an engel refrig/freezer in the cooler seat, another smaller cooler, 2 series 27 batteries [ besides my starting battery] and a 27 gal waterbladder in the vee berth.

I'm so low in the water I had to put ablative on the bootstripe

I see a lot of transoms when I sail, because I'm always in the back

But I am having fun and hoping to go to Florida this February - if I don't chicken out. I was lurking regarding your Florida plans but didn't say anything because I'm not a definite.

Please pardon me Gravy, I'm not trying to hijack your topic but I wanted to answer Divecoz

MacGregorSailors.com

MacGregorSailors.com

Rhino linning the bottom

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