[C38] How to approach an argument with a sailor
Pierre Patino
pierre.patino at gmail.com
Wed Sep 14 02:00:56 EDT 2011
My Catalina 38 does Warp 8.5 while cruising San Francisco Bay.
Sometimes in the slot while the tide is 5.3 knots abeam and the wind
is a mere 38 knots astern i can get to warp 8.7. It's a logarithmic
scale. Warp 9 means that the hull will dissolve due to friction.
That's tonight's logic
On Tue, Sep 13, 2011 at 10:48 PM, Anders Finn <anders at finn.ws> wrote:
> I think the question is more of surging vs sustained speed. We've narrowed it down to inside SF bay so they're not surfing. I still don't believe the 26 knots surging (without tide) inside the bay. . Just dont. I CAN believe 16 knot surges though for a few seconds.
>
> They do claim 23 knots sustained surfing during the costal cup. . Course, we've done 15 knots surfing on our c38 when no one else was watching. . .right dad? hehe
>
> Anders
>
>
> On Sep 13, 2011, at 10:37 PM, Steve Smolinske wrote:
>
>> Maybe the confusion is incorrectly using terminology planing versus surfing, our displacement boats and all displacement boats can catch a wave and surf.
>>
>> ________________________________
>>
>> From: listserve-bounces at catalina38.org on behalf of Patrick Harpole
>> Sent: Tue 9/13/2011 10:29 PM
>> To: Catalina 38 Listserve
>> Subject: Re: [C38] How to approach an argument with a sailor
>>
>>
>> I referred to a "displacement " which cannot plane. I have about 20,000 pounds in my keel. It will not plane.
>> There is no limit to the speed of a planing vessel. That's is why catamarans go mast.
>> While in Florida I saw Whitbread (if you are not familiar....this is a race around the world) boats. I would not call them nor America's Cup boats displacement vessels. They are very light and have winged keels that bring them out of the water.
>> Patrick
>> P.S. what is the fastest tack for a sailing boat? Clue: it is not downwind.
>>
>> ----- Original Message -----
>> From: David A Hadfield <mailto:dahadfield at gmail.com>
>> To: Catalina 38 Listserve <mailto:listserve at catalina38.org>
>> Sent: Tuesday, September 13, 2011 6:16 PM
>> Subject: Re: [C38] How to approach an argument with a sailor
>>
>> Patrick
>>
>> On being uninformed.
>>
>> The SC37 can plane in downwind attitudes,
>> ie. go faster than calculated hull speed.
>>
>> These are apples and oranges and one must be careful on exactly what one is addressing.
>>
>>
>>
>> On Tue, Sep 13, 2011 at 6:10 PM, Patrick Harpole <1derful at comcast.net> wrote:
>>
>>
>> I sail a Catalina 38 and reached 12 to 14 knots sailing from Benecia to Berkeley. The reason for the speed is an ebb current at 6 knots.
>> There is no way a displacement vessel can reach greater than their calculated hull speed. When one exceeds hull speed they are unduly stressing their rig...which might come down. What a shame for being stupid.
>> Patrick
>> ----- Original Message ----- From: <david at dlrfilms.com>
>> To: "Catalina 38 Listserve" <listserve at catalina38.org>
>> Sent: Tuesday, September 13, 2011 5:47 PM
>> Subject: Re: [C38] How to approach an argument with a sailor
>>
>>
>>
>>
>> Not too long ago I saw a video of a CAL 40 running offshore in a big wind
>> with a heavy kite. They were sustaining over 15 kts and hitting high
>> teens.
>>
>> Does the Santa Crus 37 plane? If it does, 15-20 kts wouldn't be outrageous.
>>
>>
>>
>>
>>
>> Advice seeking time.
>>
>> So, I've got a friend who sails on a VERY fast boat. A very winning
>> boat. Probably one of the fastest in San Francisco. It's crewed by a
>> bunch of amazing sailors including some Cup guys. However, she's not
>> really a sailor and I've had to explain things like what a knot is vs
>> mph. The boat is a Santa Cruz 37 rates in a 27PHRF. Now, she claims and
>> has some text messages from other crew saying they've hit 26knots in the
>> bay. I call BS. I pull out all my math on hull speed, plain force
>> calculations on what it would take to make that boat go into full plane.
>> I've tried showing what PHRF means and that a 27 means they only average
>> 1/2 knot faster than the J/105's. I've tried pulling out their race
>> times and showing they're only averaging about 6-7knots during races. .
>> This does not matter.
>>
>> Probably most of us have seen exceedences in hull speed for our boats
>> going down waves and whatnot. However, that's not the claim. The claim
>> is they REGULARLY go 16-20 knots in bay races. This is 2x or more their
>> hull speed. .
>>
>> Thoughts on how to explain this or anyone have experience with a SC37?
>>
>> Anders
>>
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>>
>>
>>
>>
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>>
>>
>>
>>
>> --
>> Respectfully,
>> David Hadfield
>>
>> Plan-B Design Group
>> 2011 E Gage Ave
>> LA, CA 90255
>> dahadfield at gmail.com
>> SKYPE david.alan.hadfield
>> www.bit.ly/planbdesigngroup
>>
>> 310.871.2012 C
>>
>>
>>
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