Korsgard!
Well, Runge-Kutta 2nd order circulation deserves your full attention. (Muzza, we do not need formulae, equations or fractional integrals here.) It explains why you always should tack below, and in front, of your opponent (if not a windshift tells you otherwise). It also explains who bad air travels to windward, relatively to your own boat. This second order circulation is, at is says, a 2nd order. Thus, you connot feel the circultaion in your hair hanging there at the forstayfitting at your mast. And putting your head above fitting in the region of the upper 8:th part of your mast. No, it reveals itself as an increased windspeed at the leeward side of your main, there you are putting your head, compared to that on a mastheadboat (trying to keep your head in the same position!).
Regards,
Booster
Thanks Booster. I tried putting my head where you said, but my 1 metre model sank when I stood on the deck.
Muzza
Thanks Muzza!
Well, you did your very best. Let’s hope Korsgard brings his cyclop.
Regards,
Booster
<blockquote id=“quote”><font size=“1” face=“Verdana, Arial, Helvetica” id=“quote”>quote:<hr height=“1” noshade id=“quote”>Originally posted by booster
Korsgard!
Thus, you connot feel the circultaion in your hair hanging there at the forstayfitting at your mast. And putting your head above fitting in the region of the upper 8:th part of your mast.
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[:-clown][:-cowboy][:-clown][:-cowboy]
Oh yeah, I do that all the time. Especially when I lose my spinaker halyard or forget to put the windex on the masthead. Then my buddy has to hoist me up on the bosun’s chair. [:-scared][:-scared] This year we’ll do it while under sail so I’ll be able to fully appreciate the effect[:-jump][:-jump][:-jump]
Korsgard!
Good move there. By the way, the bosun’s chair provides Cougar with further possilbilities in the tub. Moreover, he desperately needs some Runge-Kutta 2nd order circulation the tub. Regards,
Booster
The fractional rig is more user freindly over a much greater wind range than the masthead rig.
Fractional and masthead rigs are Identical in performance at the “design wind” when the wind increases past this point the masthead boat must swap to a smaller sail…the fractional rig carries on the same as the rig is allowed to depower by mastbend.This is the fundamental diffrence between the two.
The fractional rig covers the whole wind range.
I sail a 20 ft trailer yacht with a fractional rig.This boat has been in my family for 30 years(its still fast with constant mods 
)
In 30 years this boat has never ever had a reef in the main sail or carried a smaller jib.
Now try that with a masthead rigged boat.
The way sail area is mearsured in rating rules also dictates what type of rigs that are used.
Generations of yachts have been heavily influenced by rating rules.A very bad thing in my opinion.
Muzza (out of interest),our boat was designed in 1967 with a fractional rig.Well before Bruce Farrs time.the influence on rig and hull shape appears to be from the Flying Dutchman.
Cheers
Brett
Brett
Sounds like a Noelex - but that’d be 22’.
Muzza
One generation before…Think of a 20ft Noelex,designed by the same guy with a few “tweaks” added over the years.
She is about to get another 230mm waterline length at the bow…and some bigger rags.
Brett
Hi!
Some free classes exists where you measure the real sailarea. Thus, no fractions of the sailarea of main or jib are included in the mesurement equation(s). In such classes the main grows larger and larger over the years of development. Hence, the jib gets smaller and smaller. Usually a sail-plan similar to the Star (Olympic Class) is the result of years of empirical tests. This should give us a hint about fraction vs masthead.
Regards,
Booster
Hi!
Seems that I have killed this discussion. To bring the steam up: Perhaps the situation is different for RC:s? We sail in the mixing zone of water and air to a larger degree than bigger boats. The wind direction is so different in the lower parts of the main compared to the upper parts, that a big main cannot be sheeted and twisted effectively under varying conditions? What more?
Regards,
Booster