can anyone fill me in on why this happened blowing 17 kts 2foot chop

You didn't say what boat--my guess a Nacra 5.2. You had dagger all the way down on a beam reach. Way to much leverage--will snap board. Pete

My guess is a 5.8. Either way, I agree w/ Pete. I hardly ever put them all the way down, only if I'm trying to point as high as possible and the wind isn't gusting enough to make me trip over'm.

--
Rob
OKC
Pile of Nacra parts..
--

Guys now that is information I need to know. Thanks never thought about it.

--
Nacra 5.2
--

He needs a 5.2 dagger as he posted in another thread looking for one.

I've had the centerboards on my boat flip up while on a beam reach a few times.

well still on the hunt for boards thinkin drive to diego and buy that 5.2 or pete from big bear mentioned making them out of balsa core carbon wrap? solcat boards wont fit too thick any ideas? thought for the day... the wife does not like non-aproved hull flying oh and pull those boards up on a beam reach pete nailed it at 7:30 this mourning on beam ringing its neck boom the ama rode so low in water i was thinking hole in the trunk and lake piru is deep ever get a chance wind is blowing 12 right now

walls619, use http://www.searchtempest.com to look for spare parts in your area if none on this website

--
TurboHobo
H14T
H16
P18
G-Cat 5.0
P16
--

Put a wanted add in the classified section, you may get a nibble.

I was gong to say that unless you have done some serious fiberglassing, by the time you build your own, adding up the money, time and 2 boards you are likely to screw up before you get it right (that is what i would end up doing anyway), you might as well have bought a new one. Then I looked at Murray's prices!! HOLY COW, the stock boards are almost $450 now, roughly double what they were a year or so ago.

Note that 5.2, 5.5, 5.8 and 6.0s all use the same daggerboards.

New England Cat's has one right now for $285 (Murray's old price).

http://www.new-england-catamarans.com/hot.html

ANd if anyone has some older 5.2 daggerboards and rudders I might also be interested just to have spares around.



Edited by Wolfman on Jul 17, 2011 - 08:16 PM.

--
Dave Bonin
1981 Nacra 5.2 "Lucile"
1986 Nacra 5.7 "Belle"
Winnipeg, Manitoba, Canada
--

thanks the idea of buying another 5.2 is tempting still was planing to upgrade in 6 months to 5.7or5.8 and a back yard full of 5.2 ive got the bug but thats the a serious infection

The dagger probably blew as a result of the previous years of use. We snapped last week in ~15 knots of breeze, but the previous week we had been double-trapped in 25-30 (N5.8). There was probably some delamination in there somewhere..

The 5.2 and 5.5 share daggers while the 5.8 and 6.0 share another (larger) size.

Hey Shawn, check these out. Not sure about the 5.2 vs 5.8 dagger size difference or not. maybe measure your good one and see if it is the same.

http://www.thebeachcats.c…c-cathauler-trailer.html

Jeff O

--
Jeff O
N5.0
solcat 18(sold),
N5.2,
H16
Camarillo CA
--

thanks guys i didnt post anything for weeks when i got cat but read every post just about i finely piped up and you guys are dialing me in had no idea murrays has them for sale or that 5.5 shares same board thanks again 450 at murrays the 5.2 in san diego is looking better for 700 the guy didnt call back yet that means strikeout but well see looking at new england cats now

email the nacramike guy that Duly posted to contact and ask if he has em.

He posted it in the "craigslist finds" thread.



Edited by matt922 on Jul 17, 2011 - 09:28 PM.

The 5.8 and 6.0 have different boards. I have a pair of new ones that need a new home.

--
Philip
--

Might have an extra. My 5.2 came with the original ones and 3 new ones. Rather sure they all the same.. Will check today. Livermore CA Hal

--
Hal Liske
Livermore CA
H 16 (6+ 1.. Friends) H 3.2 N 5.2 (2) H 17 (2) H-18
Nacra 5.8 (son's) H 20 (Friends)
It's a Sickness

I Need a A Cat Please
--

thanks so much could you please email swalls619@yahoo.com .fillmore ca shawn

correction it's

NACRAMIKE55

at

yahoo dot com

He has some part's for hobie,,prindle,,& nacra's..

matt922

email the nacramike guy that Duly posted to contact and ask if he has em.

He posted it in the "craigslist finds" thread.Edited by matt922 on Jul 17, 2011 - 09:28 PM.

Just sent new email seriously thinking another parts cat?

for half the weight, but probably twice the price?, the carbon dagger of the weta trimaran are almost exactly the same size as the 5.2 daggers

Good to know , that makes 5..2 5.5 the same and the weta close . Unfortunetly twice the price means! 1,430 i called murrays which happens to be 20 miles up the road.Steve didnt want to even tell me the price,we both droped f-bombs and realized if i made them he'd buy'm. oh rick from the east coast is unbelievable , when he saw the new price for board he honored his catalog.Either i mellow out and just buy single board or buy another boat , keep ringing its neck ,and have extra everything.I like the latter...


commas,,and periods..
Fillmore,CA

Ok, I need to ask here....

I just bought an '05 Nacra F18 which has several new features...duh, I haven't sailed a beach cat for over 20 years...I will have a session with the previous owner soon but this dagger board thread interests me.

I noticed in videos several leeward daggers in the air and partially inserted...but never thought the windward one (ie both) was in question. So, sailing tight, no prob...but if you head off the wing on a beamy reach, you need to partially raise it??

Thanks for this info, great stuff to know.

--
Bert Scott
Niceville, FL
Nacra F18
--

News to me also. I know that you raise the leeward dagger just to cut down on the drag but I have never heard of raising the windward dagger. I would have thought that they were designed to counteract the forces with the full length specifically on a beam reach. I know I certainly wouldn't design something that would fail when it encounters a design limit you know it will encounter... Everyone who owns a cat would have snapped a dagger by now.

--
Dave Bonin
1981 Nacra 5.2 "Lucile"
1986 Nacra 5.7 "Belle"
Winnipeg, Manitoba, Canada
--

A '76---'81 Nacra 5.2 is 30-35 years old. That leeward dagger (ie either dagger) has been bending back/forth well over a thousand times in that life span--and in the same spot!!! Take almost any material & do the same and you're bound to get a failure rate of 5-15%. It's only in the past maybe 10 years we.ve begun to see this problem. Same thing with hulls. I do not take my La Paz P-16 (with 350 injection holes in the hull) out in 5-6 foot waves in 15 knots cause I want to have it for a few more years. A new boat would be different. Pete

Oh I agree, anything on a 30+ year old boat subject to fatigue loading is liable to break at some point.

But my point is, there is a line between being cautious and paranoid (everyone has to decide where it is). You have a boat that you, enjoy but you know there are problems with it and what they are so you compensate for that by sailing accordingly.

I have my 1981 Nacra 5.2, its my only boat and I have replaced darn near everything on her. As far as I know it only has two or three seasons of sailing on in and was stored the rest of the time, or the previous owner could have sailed the piss out of it (although it doesn't show it). So should I treat it like a 30 year old boat with 30 seasons under its belt or a 30 year old boat with 3 seasons? If I treat her like the former I am going to miss out on some great sailing! The only thing I know for sure is that I regularly check my boards and they are rock solid.

I'm not going to pull them up and lose performance just because they 'could' break. It is just about as likely that I am going to break a rudder or even the nose off of one of my hulls one day. If they break I will replace them or reconstruct them, same as with a new boat. They are expensive and/or a pain to make but that is part of owning a boat.

I guess what I am trying to say is that I would be more worried about keeping the regular maintenance up because preventing the a mast coming down on me is more important than preventing breaking a daggerboard by pulling it up on a reach. And I would sail the boat as intended (provided it is in good repair) until it breaks down. Then part it and buy a new one. :)

And if anyone knows of a source for cheap Weta boards, let me know.

--
Dave Bonin
1981 Nacra 5.2 "Lucile"
1986 Nacra 5.7 "Belle"
Winnipeg, Manitoba, Canada
--

OK, I like that logic and I'm glad this is a topic of aging not of normal performance. I believe my 05 boat will not need any concern in this area....but I will work to define, for myself, what is 100% and what is 80% for those years that are just around the corner.

Thanks for the discussion.

--
Bert Scott
Niceville, FL
Nacra F18
--

$778 ?!?! I'm sitting on a stack of these. I'd say early retirement time...except:

They break.

I know of no upside to putting one down all the way on a reach, but I'm no expert.

--
Rob
OKC
Pile of Nacra parts..
--

Yep that tears it. This winter I'm going to learn how to make a mould and start making them out of foam and carbon fiber/kevlar. I figure, I can make them and sell them for $350 and still be making about double my investment.

D.

--
Dave Bonin
1981 Nacra 5.2 "Lucile"
1986 Nacra 5.7 "Belle"
Winnipeg, Manitoba, Canada
--

Any way you can speed up production,and cut a brother at arms a deal?bulk rate?west coast distributor?or just bro deal .. I was thinkin all black hulls ,with the jolly roger painted on the daggers. yeah stick to the code.We should get in touch, a contractor i sub for has a cnc machine and set op for 2and 3 pound stucco foam.Need to research ,what density foam how much cloth and glass.Boards need to break not dagger trunk ,am having issue with that taking on water not a lot.Just a thought,on the other side of the coin . With boards at 350 a pop,and whole sleds for 700 ,looks like a chrisning party sat for the pearl.Oh still down one board!



one board willie(79 nacra 5.2)
the pearl(81 nacra 5.2-saturday)
hulls-up boards80%-down
,,, ...
fillmore , ca

Damm,I just read that i'll never be a writer! at least i'm good on the phone.



see above,,,...

What about dagger board do it yourself kit? five blanks,directions,cloth,even a 20 min dvd ! wolf whats my cut


cat of the brain syndrome
no seeds no stems
hulls and boards
and a good idea every now and then

Unfortunately I'm too busy doing real work right now. :(

You can buy the structural closed cell poly foam (airex or other brand) from many sources (don't have any handy right now). Or make a mold and use the 2 part expanding foam stuff from US composites. http://www.uscomposites.com/index.html

Cheaper alternative is to get some western red cedar or balsa blanks for the main body and glass it with fiberglass, carbon or carbon/kevlar. Its denser than the foam, but with a 30 year old boat weight isn't the most critical problem. In the case where you are glassing the blanks having a CNC router would be a huge advantage over having to sculpt them yourself!

There are some good instructions and videos on how to build the foils here: [url]http://www.uk-cherub.org/doku.php/tech/howto. Toughest thing would be if you want to vacuum bag them to get more strength out of the fiberglassing. Again probably not essential if you put a couple more layers on. I have a guy here who does sailboards that I might try and sucker (convince) into making a set of foils for me.

--
Dave Bonin
1981 Nacra 5.2 "Lucile"
1986 Nacra 5.7 "Belle"
Winnipeg, Manitoba, Canada
--

Here is the supply place i was thinking of to get the foam and other supplies: http://www.noahsboatbuild…ahmain/index.asp?url=IND Of course it's in Toronto.

D.

--
Dave Bonin
1981 Nacra 5.2 "Lucile"
1986 Nacra 5.7 "Belle"
Winnipeg, Manitoba, Canada
--

yurdle

$778 ?!?! I'm sitting on a stack of these. I'd say early retirement time...except:

They break.

I know of no upside to putting one down all the way on a reach, but I'm no expert.

I've gotta reneg on this.. My 5.5 clearly steers better, with much less chance of the rudders breaking free of the water (cavitation?) if I have the dagger 80% or more down. I solo it all the time, which means I'm trying to depower a bunch, but its still a much better sail with the daggers down.

--
Rob
OKC
Pile of Nacra parts..
--

I've had the centerboards on my boat flip up while on a beam reach a few times.

--
Matt
P19MX #1055
Gulfport, MS

Matt922,
Loosen the set screw in the little puck at the top of your centerboard until the fit is tighter and your board won't pop up on you.