Jib Top for Cruising in the PNW?

Raz'r

Super Anarchist
59,998
4,634
De Nile
Where I normally sail, a #1 is superfluous, but I have a really nice full size jibtop. I’m wondering, can I cut her down to the #2 size? Then I can carry for some of the ocean races (I’m rated for a #2)

 

Somebody Else

a person of little consequence
7,565
740
PNW
I really don't want any flapping on my brand new Genoa...
Have the sailmaker throw in a few cringles in there too. No need for flapping. But...

Re: your original query about adding a jib top to your inventory:
My take for cruising is a simple 4 sail inventory:

  • Main, of course.
  • High-clewed genoa.
  • Working jib with reef points.
  • Cruising spinnaker.

The high-clewed genoa is not a dedicated jib top. Just get the foot high enough off the deck so that you can see boats to leeward of you and the clew high enough that you don't need to move the fairlead [much] when you crack off.

Working jib with angled reef points so the reefed sail sheets to the same position as the unreefed sail. Reefed, it becomes a small #4/storm jib.

Spinnaker should tend toward a reaching cut as opposed to deep running. You want to narrow that inventory gap between the high-clewed genoa and the spinnaker.

 

climenuts

Anarchist
667
262
PNW
Have the sailmaker throw in a few cringles in there too. No need for flapping. But...

Re: your original query about adding a jib top to your inventory:
My take for cruising is a simple 4 sail inventory:

  • Main, of course.
  • High-clewed genoa.
  • Working jib with reef points.
  • Cruising spinnaker.

The high-clewed genoa is not a dedicated jib top. Just get the foot high enough off the deck so that you can see boats to leeward of you and the clew high enough that you don't need to move the fairlead [much] when you crack off.

Working jib with angled reef points so the reefed sail sheets to the same position as the unreefed sail. Reefed, it becomes a small #4/storm jib.

Spinnaker should tend toward a reaching cut as opposed to deep running. You want to narrow that inventory gap between the high-clewed genoa and the spinnaker.
I like the sail inventory and see how it applies to a lot of people. In the BC South Coast the issue is I'm always beating or running in the various channels (with the exception of the previously mentioned Strait of Georgia crossings). This has led me to focus the Genoa on upwind performance; especially when my beat VMG is 3-4kts towing a dinghy. I also get my best run VMG pointing DDW in anything over ~10kts so I use the Symmetric kite a lot.

Here's a 'shitty' polar set I made myself by interpolating from a C&C 25 and C&C 30's polars. Has been pretty accurate to my past experience but there's a couple wonky crossovers.





C&C 29mk2


 


Hull Speed


6.33


 


 


 


 




 (from Hull Speed Interpolation of C&C 25 and C&C 30 Polars)


 


 


 


 


 




TWS


6


8


10


12


14


16


20




TWA


43.8


42.9


43.4


42.5


41.7


41.5


42.2




AWA


26.8


27.7


29.1


29.5


30.2


31.1


33.4




AWS


9.21


11.73


14.14


16.46


18.50


20.51


24.44




VMG (Beat)


2.81


3.31


3.70


4.03


4.13


4.18


4.15




BS (Beat)


3.90


4.52


5.09


5.47


5.53


5.57


5.60




52°


4.32


5.07


5.59


5.86


5.99


6.05


6.06




60°


4.60


5.37


5.79


6.02


6.16


6.24


6.27




75°


4.82


5.56


5.94


6.16


6.35


6.50


6.65




90°


4.78


5.64


6.09


6.32


6.50


6.67


6.98




110°


4.89


5.77


6.20


6.54


6.84


7.07


7.35




120°


4.74


5.67


6.15


6.51


6.85


7.16


7.60




135°


4.34


5.27


5.93


6.30


6.03


6.98


7.63




150°


3.74


4.65


5.44


5.98


6.31


6.63


7.25




VMG (Run)


3.24


4.03


4.74


5.40


5.88


6.22


6.82




TWA


148.5


152.2


153.9


168.5


180.0


180.0


180.0




AWA


112.9


124.0


130.1


159.0


180.0


180.0


180.0




AWS


3.40


4.50


5.75


6.69


8.12


9.78


13.18




BS (Run)


3.80


4.56


5.28


5.51


5.88


6.22


6.82




 

P_Wop

Super Anarchist
6,415
3,325
Bay Area, CA
I never TRULY realized and appreciated just how damn expensive winches were until I had to replace a couple...
I remember Raul Gardini trying to put it in perspective for a young Italian journalist on one of the later IOR Maxis, Il Moro di Venezia III.  Standing on deck he started pointing to each winch and said: "Fiat, Fiat, Alfa Romeo, Alfa Romeo, Maserati, Fiat, Maserati, Lancia..." etc... 

The poor boy's jaw dropped several centimetres as the truth sank in.

 

Raz'r

Super Anarchist
59,998
4,634
De Nile
I remember Raul Gardini trying to put it in perspective for a young Italian journalist on one of the later IOR Maxis, Il Moro di Venezia III.  Standing on deck he started pointing to each winch and said: "Fiat, Fiat, Alfa Romeo, Alfa Romeo, Maserati, Fiat, Maserati, Lancia..." etc... 

The poor boy's jaw dropped several centimetres as the truth sank in.
Back in the day, say 1993-4, I was at a Finance all-hands for Intel. We were talking about yields on chips. Exciting stuff, not.

There was a factory VP on stage, he had a 6" wafer, with x486s etched on them, but for some reason, lost that wafer (bad). His words. "Here's a brand-new corvette." (Yes, the average yield on a 486 wafer was around $60k net to Intel)

Then, he had the normal tray used in the factory, this thing is about 12-14" long, holds like 50 of these wafers. Also dead. His words "and here's a parking lot of corvettes"

Auto-analogies work really well!

 

P_Wop

Super Anarchist
6,415
3,325
Bay Area, CA
Back in the day, say 1993-4, I was at a Finance all-hands for Intel. We were talking about yields on chips. Exciting stuff, not.

There was a factory VP on stage, he had a 6" wafer, with x486s etched on them, but for some reason, lost that wafer (bad). His words. "Here's a brand-new corvette." (Yes, the average yield on a 486 wafer was around $60k net to Intel)

Then, he had the normal tray used in the factory, this thing is about 12-14" long, holds like 50 of these wafers. Also dead. His words "and here's a parking lot of corvettes"
A few years ago, as a chip guy myself, we designed a really tiny MPU for the IoT.  Our fab partner was getting 2,000+ from an 8" wafer, and that was on 180nm mixed signal.  They produced lots of expensive silicon dust when dicing them.  He announced one day that he was getting a yield of 101.5%.  WTF?  Yes, our individual dies were so small he was counting some good ones round the edges.  Rather than testing all the dies on-wafer, we packaged them all, and tested later.  Cheaper.

In our case the devices were each sold for so little that the whole wafer was worth the same as a old and abused third-hand Skoda.

Back to your usual programming.

 
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