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catsalor

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Posted: Jun 22, 2018 - 09:14 AM

Does anyone know if boards from other nacra catamarans will fit on a Nacra 5.2 ?
tamumpower1

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Posted: Jun 22, 2018 - 12:26 PM

Yep, 5.5, 5.8. All the same. Some might have holes cut in the top to reduce windage and give a handle but the profile and everything are the same.
samc99us

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Posted: Jun 22, 2018 - 12:46 PM

Hole for reduced windage? Might want to check your aero text book, that big hole is super draggy when sailing to windward.

It exists to provide a handle and some form of weight reduction. Please note all the new boats don't have those, a big reason being the loads on longer high aspect ratio boards are very high and a big gap in the middle of the board at the second highest load bearing location is a good waste of material.
catsalor

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Posted: Jun 22, 2018 - 01:11 PM

Thats good to know because I want a spare set
tamumpower1

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Posted: Jun 22, 2018 - 01:40 PM

Depends on the size of the hole. You wouldn’t have them up going to windward. You pull a foot on a beam reach so you don’t snap a board when it’s blowing above 15. At that point the hole is above the load point so strength isn’t an issue with having a hole.

Regardless that’s what the old nacra guys told me was the intention. Not my words.
nacra55

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Posted: Jun 22, 2018 - 03:39 PM

tamumpower1Yep, 5.5, 5.8. All the same. Some might have holes cut in the top to reduce windage and give a handle but the profile and everything are the same.

5.8 boards are NOT the same as 5.2 boards.

5.2, 5.5 and most 18 square boards are the same.

5.8 and 6.0 boards are the same.

--
Ron
Nacra F18
Reservoir Sailing Assn.
Brandon, Mississippi
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tamumpower1

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Posted: Jun 22, 2018 - 07:46 PM

nacra55
tamumpower1Yep, 5.5, 5.8. All the same. Some might have holes cut in the top to reduce windage and give a handle but the profile and everything are the same.

5.8 boards are NOT the same as 5.2 boards.

5.2, 5.5 and most 18 square boards are the same.

5.8 and 6.0 boards are the same.

I’m no expert but I’ve seen an 5.8 and it’s boards and they were the same as regular boards. The nacra boards Murray used to sell were listed at fitting the 5.8 as well as the others. Discuss

Edited by tamumpower1 on Jun 22, 2018 - 08:50 PM.
nacra55

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Posted: Jun 22, 2018 - 09:28 PM

tamumpower1
nacra55
tamumpower1Yep, 5.5, 5.8. All the same. Some might have holes cut in the top to reduce windage and give a handle but the profile and everything are the same.

5.8 boards are NOT the same as 5.2 boards.

5.2, 5.5 and most 18 square boards are the same.

5.8 and 6.0 boards are the same.

I’m no expert but I’ve seen an 5.8 and it’s boards and they were the same as regular boards. The nacra boards Murray used to sell were listed at fitting the 5.8 as well as the others. DiscussEdited by tamumpower1 on Jun 22, 2018 - 08:50 PM.

Matt, Follow this link, and download the nacra parts catalog, go to the 4th page and look for parts 1030 and 1032.

https://www.thebeachcats.…067&g2_imageViewsIndex=1

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Ron
Nacra F18
Reservoir Sailing Assn.
Brandon, Mississippi
--
Andinista

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Posted: Jun 24, 2018 - 10:43 AM

5.8 boards are bigger
There’s a pair of 5.2 on the classifieds
You normally find on eBay too
JohnES

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Posted: Jun 24, 2018 - 01:43 PM

tamumpower1Yep, 5.5, 5.8. All the same. Some might have holes cut in the top to reduce windage and give a handle but the profile and everything are the same.

Are you thinking of the rudders? The boards for the 5.2 and 5.5 are the same, the 5.8 and 6.0 will be too thick, and too wide they'll never fit in the centerboard bunks.

Regarding the holes on the boards reducing windage... when did they legalize pot in FL?

Edited by JohnES on Jun 24, 2018 - 01:44 PM.

--
John Schwartz
Ventura, CA
--
tamumpower1

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Posted: Jun 24, 2018 - 07:21 PM

Hold on, let me go swing a piece of plywood through the air and compare the drag to a tennis racket.
catsalor

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Posted: Jun 24, 2018 - 08:25 PM

Here I thought I asked a simple question about boards so 5.5 and 5.2 are interchangeable but sorry I don't know what an 18 square is? Most of the time that I have seen nacra boards there is a black line drawn across would that be the working depth or just a way to even up the boards or?

Thanks in advance for the good info
tamumpower1

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Posted: Jun 24, 2018 - 10:05 PM

catsalorHere I thought I asked a simple question about boards so 5.5 and 5.2 are interchangeable but sorry I don't know what an 18 square is? Most of the time that I have seen nacra boards there is a black line drawn across would that be the working depth or just a way to even up the boards or?

Thanks in advance for the good info

It’s the hulls an original 5.5 was made from.
catsalor

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Posted: Jun 24, 2018 - 11:18 PM

QuoteIt’s the hulls an original 5.5 was made from.

--
Matt
'82 NACRA 18 Square "Bangarang"
'85 Hobie 18 "Honey Badger Don't Care"
'86 Hobie 18 "The Rippin & The Tearin"
Dunedin, FL
--

tamumpower1
catsalorHere I thought I asked a simple question about boards so 5.5 and 5.2 are interchangeable but sorry I don't know what an 18 square is? Most of the time that I have seen nacra boards there is a black line drawn across would that be the working depth or just a way to even up the boards or?

Thanks in advance for the good info

It’s the hulls an original 5.5 was made from.

18 square is a catamaran? I'm confused
tamumpower1

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Posted: Jun 25, 2018 - 02:09 AM

18 feet long max, 18 sq/m of sail, anything else goes. Open class from back in the day. Nacra at first used 5.2 hulls but then stretched them to 18 feet long with a beam usually around 11', unirig. The beam was then shrunk to normal width and the 18 foot long hulls became the 5.5 uni, then a jib was added and the sloop 5.5 was created.
JohnES

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Posted: Jun 25, 2018 - 03:03 PM

tamumpower1
catsalorHere I thought I asked a simple question about boards so 5.5 and 5.2 are interchangeable but sorry I don't know what an 18 square is? Most of the time that I have seen nacra boards there is a black line drawn across would that be the working depth or just a way to even up the boards or? Thanks in advance for the good info

It’s the hulls an original 5.5 was made from.

Other way around, the 18 Square was first... then came the 5.5 Uni, then the 5.5 sloop rig... I think the first one was built for Skip Elliott. When the 5.5 Sloop Rig came out they discontinued the 5.2 in 1984... Legend has it there are a few 1985 5.2's out there as these were made for the 5.2 Worlds held in Japan..

--
John Schwartz
Ventura, CA
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tamumpower1

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Posted: Jun 25, 2018 - 04:58 PM

Kinda got a post echo going on lol. The way I wrote that means the square was first. A 5.5 was made from the squares hulls
nofearofflying

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Posted: Jun 25, 2018 - 06:12 PM

5.5 BOARDS SMALLER LIGHTER IN WEIGHT THAN 5.2 BOARDS, BUT 5.2 BOARDS WILL FIT INTO "WELLS " ON 5.5
dmgbear55

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Posted: Jun 26, 2018 - 01:32 AM

The answer to the original question is that the newer NACRA boards are slightly thicker than the boards for the 5.2, but with only slight modification to the trunks you can use these thicker newer boards on the 5.2. I needed a replacement board some years back and got the thicker board and made the minor modification and it works just fine. I have also modified my old board to have the nice handle in it, so they both match in appearance too.

For sure the new shape is slightly stronger than the original 5.2 board, but with that comes some additional drag. I have since also repaired the older damaged board and am using it as a spare.

Edited by dmgbear55 on Jun 25, 2018 - 11:36 PM.

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dg
NACRA 5.2 #400
This End Up
Original owner since 1975
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P.M.

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Posts: 866
Posted: Jun 29, 2018 - 11:18 AM

[quote=JohnES]
tamumpower1

Regarding the holes on the boards reducing windage... when did they legalize pot in FL? Edited by JohnES on Jun 24, 2018 - 01:44 PM.

SMDH. Agree John, crazy some of the stuff you read on the web!

Obviously, "somebody" has never tried to put a 5.8/6.0 board in a 5.5 slot.

--
Philip
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