You sly old dog, you.
![Wink :wink:](./images/smilies/icon_wink.gif)
![Very Happy :D](./images/smilies/icon_biggrin.gif)
You are absolutely correct, a video would be very telling, and Mainsail did one and posted it on this board on 4/17/09.
Keep up the good work!
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Darrell
Moderator: Jim Walsh
Andy Denmark wrote: ... Sailing on a comfortable reach with the boat on autopilot put the GPS next to the gearshift and observe what happens when the tranny is put in gear (prop locked) and taken out (prop freewheeling). The consistent difference and direction of the hundredths digit on the GPS tells the story - it winds up, it winds down, and it does so every time ...
The link includes the following: "Hold on! Exceeding max hull speed is possible with outside assistance."John Vigor wrote:Simple sailors who don't have degrees in science might like this down-to-earth explanation of why heavy-displacement sailboats like Cape Dories don't sail faster than their theoretical hull speed:
http://www.cncphotoalbum.com/technical/ ... lspeed.htm
As a sailor, I simply ignore my own sign and kiss sun women during the day and moon women at night.John Vigor wrote:As a sun man, I can't imagine kissing a moon woman, ...
Whoa there, Windy One!WaywardWind wrote:"The link includes the following: "Hold on! Exceeding max hull speed is possible with outside assistance." "
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The Hand of God (also known as "outside assistance") pushes thousands of Hobie cats across the country any nice Sunday afternoon to exceed max hull speed, and do so by VERY wide margins. The silly writer of that term simply is not capable of sticking his head out the window of any yacht club to watch the boats go by.
Please note the stupid, stupid, stupid term "max hull speed". Stupid, stupid, stupid is the term for most every last sailboat designed in the last 90 years GOES FASTER than that term allows as possible.
Let me say this one last time. THERE IS NO LAW OF PHYSICS TO SUPPORT THE SILLY CONCEPT OF "HULL SPEED". NONE. NOT ONE. NADA. ZIP. SQUAT. DIDDLY.
Keeping up with the water flowing past is what the fabled spinning prop does (or tries to do). So revving the motor to about "break even" RPM would most likely slow you down.John Vigor wrote:As for OJ's query, there is no certainty that help from the engine will make you go any faster if you're already doing hull speed under sail. Your propeller is geared to produce the number of revs to achieve that speed, and it would simply be keeping up with the water flowing past. It wouldn't be adding any push.
I don't know about Jupitar and Mars, but the Moon and Venus were in near perfect vertical alignment on Friday morning. Is that significant or is it more telling if it leans one way or the other? (The Moon was on top, if that makes a difference.)WaywardWind wrote: Those who find emotional value in astrology will always seek comfort in the alignment of Jupiter with Mars.
WaywardWind wrote:"The link includes the following: "Hold on! Exceeding max hull speed is possible with outside assistance." "
.....................................................................................
The Hand of God (also known as "outside assistance") pushes thousands of Hobie cats across the country any nice Sunday afternoon to exceed max hull speed, and do so by VERY wide margins. The silly writer of that term simply is not capable of sticking his head out the window of any yacht club to watch the boats go by.
Please note the stupid, stupid, stupid term "max hull speed". Stupid, stupid, stupid is the term for most every last sailboat designed in the last 90 years GOES FASTER than that term allows as possible.
Let me say this one last time. THERE IS NO LAW OF PHYSICS TO SUPPORT THE SILLY CONCEPT OF "HULL SPEED". NONE. NOT ONE. NADA. ZIP. SQUAT. DIDDLY.
Windy,WaywardWind wrote:I am going to new drop a slow-breaking, hanging curve ball into the mix, and then whack it out of the park into the upper deck.
Ask a hundred thousand people -- including most people on the Cape Dory owners site, which some claim is the arbiter of all things scientific -- if it's a proven fact Earth goes around the sun, and nearly all will look at you like you have three heads. Push those hundred thou people for an answer and, again, nearly all will tell you, Of course!
Nearly all? Nearly? Who the heck wouldn't agree?
Well, no physicist would agree. Nor would anyone else with an even rudimentary knowledge of the Theory of Relativity.
Huh?
Yeah, huh. Plain and simple, if two or more objects SEEM to be moving RELATIVE TO EACH OTHER one simply has no possible way to know which is moving and which is not. Not if the speed of light is constant (and it is).
That is why one can not accurately navigate in a fog using just a compass and a knot log.
Go ahead, tell me the Theory of Relativity doesn't apply to sailboats (on the water), and "hull speed" is a Law of Physics (capital letters).