[C38] How to approach an argument with a sailor

[David A Hadfield]

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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>>
>
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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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