Re: [bolger] Re: Shorthanded Cruising AS19
- View SourceHah! I thought so! <g> You weren't getting the optimum horsepower from the
wind when you were clocked. Most people lie about how their boats go
_faster_ than they really will. ;o) I've been impressed by how well my
Jewelbox, Jr. moves in light breezes. In the lightest airs I suspect that
the high rig (20' 8" mast) catches some of the stronger breeze above the
friction of the water, and the deep rocker has less surface area, and thus
skin friction, than a flat-bottom boat with flatter rocker. When the
breeze gets a little stronger the "sea of peas" shape kicks in and she
moves along real nice but, in moderate breezes at least, I haven't got her
past maybe 4.6 knots. <shrug> I'll have to check the batteries in my GPS
and take her out on a breezy day on the local mudhole (the Thistle
nationals are being held there this week, and every afternoon the wind has
been gusting into the mid to high 20 mph range! Probably too much
excitement in a racing dinghy <g>). My 15' sailing skiff, with a slightly
longer waterline length and much flatter rocker, has little trouble going
a little faster than theoretical hull speed (given a good wind, she's
undercanvased for use on the windy Oregon Coast), but the JB, Jr.
struggles to get past hull speed...
A curious thing is how fast Sage goes under power. That 3.5 Tohatsu is
more power than she _needs_, but she somehow manages to make us of it.
<shrug> I've never got my skiff to go as fast under power as she'll sail,
even using a 4 hp. engine, she just wants to dig her stern in... I would
have expected that the flatter rockered skiff would outdo the heavily
rockered JB, Jr.
BTW, I got the Tohatsu because for the same price as a 2 hp. Honda I could
get an engine with water cooling and a real (dog) clutch. On Sage, a
cruising boat, the extra weight doesn't matter much.
On Wed, 01 Aug 2007 16:49:39 -0700, cabbie wrote:
> I do have to clarify my statement about boat speed:
> I do not have a GPS or any other speed measuring equipment; I don't
> even sail with a watch.
> The first year I had the boat I was paced by Don S...on his Pearson
> 40 something. He reported 4.4 knots, and after thinking about that
> day, the wind was light. I was sailing on a close reach in smooth
> water on starboard tack; the wind was certainly less than 10 knots,
> but I'm not sure how much less. Don did remark that he was quite
> impressed with my speed in those conditions.
All the troubles of man come from his not knowing how to sit
still. <Blaise Pascal>
- View SourceWeight matters, but not as much at displacement speeds. It may take less
wind to push a JB, Jr. to hull speed than it does to push a heavier AS19
to hull speed, but unless the AS19 is severely undercanvased it shouldn't
take a living gale to provide more than enough horsepower to get her
On Wed, 01 Aug 2007 07:05:23 -0700, Rob R-S wrote:
> Weight matters, and I bet Jewelbox is quite a bit lighter that AS19.
> Michalak tends to design light compared to Bolger, in general.
History teaches that grave threats to liberty often come in
times of urgency, when constitutional rights seem too extravagant
to endure. <Thurgood Marshall>
- View SourceWhat's really smokin' is the almost 7 knots Bob Larkin's Birdwatcher 2
makes with a 2 hp. Honda! Maybe I'm misremembering, but the day he first
launched her we had trouble keeping ahead of her in an overloaded Scandal
skiff with 4 hp. <g>
On Wed, 01 Aug 2007 04:53:13 -0700, graeme wrote:
>> BTW, Sage has reached 5.8 knots being pushed by a Tohatsu 3.5 horse
>> 4-stroke in calm conditions.
> Gee, that is smokin'
Necessity is the plea for every infringement of human freedom.
It is the argument of tyrants; it is the creed of slaves.