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Several T4.9 Questions #5760
03/25/02 01:45 PM
03/25/02 01:45 PM
Joined: Aug 2001
Posts: 89
JeffWoodard Offline OP
journeyman
JeffWoodard  Offline OP
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Posts: 89
I had my innagural sail on my new boat this weekend. It was awesome. Fortunately, there was some timely discussion re: the use of dog leashes to tame the snarl..so one less thing to worry about. Anyway, on to my questions.



- The boat I have is rigged for a 21m2 sail and the halyard block is WAY too high on the mast for my 17m2. I had to ease the halyard to the point where there was 18" of line at the tack and probably 6' off the mast just to get the entry flat enough to fill nicely. Anybody know the distance from the shroud hounds for the Goodall 17m2 chute?



- The rigging guide David Swingle wrote shows running the spin sheets from the block outside both the shroud and the forward trapline. I did this, but the sheet was diverted pretty badly by wrapping around the shroud. It could have been caused by the halyard location issue, but I'm not sure. Any thoughts will be appreciated.



-What do you guys do with the tails for the cunningham and rotation controls? I have mine deadended on a bungee forward and inboard of the daggerboard trunks. I think I may start using that as the dead end for the aft trapline when singlehanding. Any thoughts would be appreciated?



-Re: dog leashes for snarl control. Do you guys think the spring would apply too much pressure to the retrieval line and result in pulling too much on the chute in lighter air?



Thanks for your help.

Jeff.


Jeff Woodard Atlanta, GA T 4.9 #216
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Re: Several T4.9 Questions [Re: JeffWoodard] #5761
03/25/02 03:01 PM
03/25/02 03:01 PM

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Jeff,



The dimensions given to me by Jim Boyer are (from the bottom of the mast): 7400mm to the gate (bail) and 7700 to the block. We have the 17m^2 chute from Goodall, and these locations appear to work well. We haven't had a chance to sail with the chute yet, but have rigged it in the driveway to confirm the gate location, pole height, etc. I'm planning to start w/ the spin sheet led forward of the shrouds. From what I saw 'driveway sailing,' this may work better. My spin pole is about 4" longer than the stock T4.9 pole - this may be part of the reason that 'forward of the shrouds' looks better to me.



Jim had us lead the cunningham and rotation lines through the front crossbar (tie the free ends together) - make sure you go through the nylon loop (at the end of the crossbar) also, or they will get caught under the aft edge of the front crossbar. My wife likes this arrangement because it's neat and tidy. If I singlehand, I will probably just run them to the stays and tie them off - so I don't have to go forward to get to the lines.



Hope that helps.



Kenn Newbury

Salem, VA

T4.9 #226

Re: Several T4.9 Questions [Re: JeffWoodard] #5762
03/25/02 03:18 PM
03/25/02 03:18 PM
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Posts: 9,582
North-West Europe
Wouter Offline
Carpal Tunnel
Wouter  Offline
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Go to the webpage :



[url=http://www.geocities.com/f16H...f16HPclass/Tech_genaker_mast_setups.html [/url]



And see how you can lower your spi hound by just drilling two holes in the mast track (NOT the mast itself) and making a hound from a piece of high tension line and a ring or shackle.



You can keep you 21 sq .mtr hound and ADD a string hound for the probably shorter luffed 17 sq. mtr. spi.



It really works well. F18's Tornado's and my own boat have used this system for succesfully for a while now.



Now I HAVE the Goodall fax where AHPC advice the hound height BUT each time I look for I can't find it. And when I don' look for it I seems to stumble into it from time to time.



Anyways, I do remember that the AHPC adviced height was only a fraction of an inch less than the hound height used in the F16 HP class rules which is 7,5 mtr. = from the top of the forebeam. 24 ft. 7 inches



I can't answer the other questions. I'm sure others can



Good luck



Wouter


Wouter Hijink
Formula 16 NED 243 (one-off; homebuild)
The Netherlands
Re: Several T4.9 Questions #5763
03/25/02 03:41 PM
03/25/02 03:41 PM
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JeffWoodard Offline OP
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JeffWoodard  Offline OP
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RE: Bail...my mast has that bail just below the block...what purpose does it serve?


Jeff Woodard Atlanta, GA T 4.9 #216
Re: Several T4.9 Questions [Re: JeffWoodard] #5764
03/25/02 05:22 PM
03/25/02 05:22 PM

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Jeff,



I believe the main purpose of the bail is to keep the chute from interfering with mast rotation. With the halyard led between the bail and the mast, you're more or less only pulling down on the block that's fixed to the mast - instead of sideways, which would try to rotate the mast in the wrong direction. Also, as Wouter pointed out, by relocating the bail you can accomodate a chute w/ different luff length. That's my understanding.



KMN

Re: Several T4.9 Questions #5765
03/25/02 06:32 PM
03/25/02 06:32 PM

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Hey- It is quite possible the spin sheets run forward of the shrouds. My very limited T4.9 spin experience was pretty much in light airs and sheeted hard. We will get the rigging guide revised if required. Please let me know if you get a good answer before I do! DCS

Kirt's reply (posted by me for Kirt has troubles) [Re: JeffWoodard] #5766
03/26/02 04:48 AM
03/26/02 04:48 AM
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Posts: 9,582
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Wouter Offline
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Wouter  Offline
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Jeff-

For some strange reason I keep being unable to login to the closed forums (Is this a message Rick??) so couldn't respond to your question there. Perhaps someone with "privileges" can repost on the F 16HP forum if you don't see here-

I have both the 21 and 17 sqm Goodall spinnakers. The luff length is the same, only the leech and foot are different (on mine anyway), however the 21 sqm sheets to the rear beam and the 17 sqm sheets to the forward shroud. Also, your halyard should go up the mast inside the "gate" (wire bail below the halyard block) then back down inside the gate to the head of the spinnaker. How long is your pole? It should be about 4-5" longer than your sailbox (assuming you have the metal AHPC sailbox) I believe 10' 8" overall?? You should have some halyard between the gate and the head of your spi- I think Greg told me 6-12" inches usually- and of course the height of your pole can affect this and the rake of your mast (mast rake should be about 50mm in front of rear beam). I just got my "skunk" hooked up on my boat and it's all loaded for Spring Fever (but never got a chance to sail it yet)- I'm hoping that's the "ticket" for solo sailing the 4.9 w/ spinnaker. I'll let you know afterwards if you aren't there-



Kirt





And David, I'm sure we'll have an answer after this coming weekend.



WOuter





Wouter Hijink
Formula 16 NED 243 (one-off; homebuild)
The Netherlands
Re: Kirt's reply (posted by me for Kirt has troubles) [Re: Wouter] #5767
03/26/02 07:28 PM
03/26/02 07:28 PM
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Kirt,

Just wondering if you have had much of a chance to compare the performance of the 17 and 21m kites.

Given the same luff length and the different sheeting positions I would be surprised if the 21m is any better.

I have no data on which to base this statement it's just that I would of thought the lift 90deg to travel would be higher possibly resulting in more hull drag.

Just a guess. I'm very interested in your experience.



Regards,

Phill


I know that the voices in my head aint real,
but they have some pretty good ideas.
There is no such thing as a quick fix and I've never had free lunch!

spi leads / sheet #5768
04/02/02 12:02 PM
04/02/02 12:02 PM
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Posts: 9,582
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Wouter Offline
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Wouter  Offline
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My spi which is very close to 17 sq .mtr. ran fine of the ratched block fixed to the most outward loop of the jib lead loops found on the trampoline.



I need to pass the spi sheet in front of the sidestay otherwise it would rub against the stay.



BTW , Kenn what do you think of that spi now , now that you two have become 3 out of 7 in the standings. I must say that that white coloured jib made you very stealthy. We could keep track of all the other Taipans by their colour drive jibs but you ... !



Wouter



Wouter Hijink
Formula 16 NED 243 (one-off; homebuild)
The Netherlands
Re: spi leads / sheet [Re: Wouter] #5769
04/02/02 02:04 PM
04/02/02 02:04 PM
Joined: Aug 2001
Posts: 89
JeffWoodard Offline OP
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JeffWoodard  Offline OP
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So you went inside the shroud, what about the forward trap line that comes out of the mainbeam? I'm thinking inside that as well.



Jeff.


Jeff Woodard Atlanta, GA T 4.9 #216
Re: spi leads / sheet [Re: Wouter] #5770
04/02/02 02:17 PM
04/02/02 02:17 PM

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Wouter,



Stealth was one of our reasons for getting a white jib - glad to here it works! We enjoyed sailing with the spinnaker once we started sailing the long (yellow) course. It was too much work to us to justify the added speed on the short course.



Returning to a previous topic - sailing with the Goodall 17m^2 chute, we ran our spin sheets aft of the first set of trap wires and forward of the shrouds to a ratchet block attached to the outer (and aft) most loop on the trampoline. This seemed to work quite well - no interference w/ the shroud or trap wire.



Kenn Newbury

Salem, VA

T4.9 #226

Kenn said it right [Re: JeffWoodard] #5771
04/02/02 02:37 PM
04/02/02 02:37 PM
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Wouter Offline
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Wouter  Offline
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The spi sheet does indeed pass just forward of the stay and therefor behind the trapline coming out of the main beam.



I pulled this particular trapline to the stay via a piece of line and a small block. I HAD to do this to make room for my genaker that was launched from a bag on the trampoline. Kenn used a snuffer system and didn't have this "problem" .



If I did't make this modification the genaker sail would flap around the trap line and get stuck between the mast and the trapline.



This happened once or twice during the races on friday. These were the short courses that Kenn was referring to. These courses were indeed very short. Although his snuffer system and my hang-ups caused him to finish about a 100 mtr. in front of me in the second race.



Although I felt the extra speed of the spi gave us spi-ed Taipans a definate advantage over the spi-less taipan and the Isotopes.



But it definately was hecktic on those short courses. And I didn't pull it in the first race at all.



Wouter


Wouter Hijink
Formula 16 NED 243 (one-off; homebuild)
The Netherlands

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