[Rhodes22-list] Balanced Helm
Ware, Joseph W.
rhodes22-list@rhodes22.org
Wed, 28 Aug 2002 12:53:44 -0400
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That'll help the mental block.
Joe
-----Original Message-----
From: Toad the Wet Sprocket [mailto:sprocket80@hotmail.com]
Sent: Wednesday, August 28, 2002 12:47 PM
To: rhodes22-list@rhodes22.org
Subject: RE: [Rhodes22-list] Balanced Helm
Joe,
There several ways to describe the same condition. I have the same
problem with understeer and oversteer when setting race car suspensions up.
Lee helm and Weather helm are as simple to remember as their names. If you
need to hold the tiller to the weather side of the boat (side toards the
wind) you have "weather helm".
Todd aka "Sprocket" ....not Toad
Please respond to sprocket80@hotmail.com <mailto:sprocket80@hotmail.com>
From: "Ware, Joseph W."
Reply-To: rhodes22-list@rhodes22.org
To: "'rhodes22-list@rhodes22.org'"
Subject: RE: [Rhodes22-list] Balanced Helm
Date: Tue, 27 Aug 2002 08:28:29 -0400
As long as we are here, help me get it straight. I have a mental block with
lee and weather helm. If the wind is coming over the port side, I am on a
port tack. If the boat is trying to head into the wind, I. E. bow to port,
and I am sitting on the high side, the port side, and I am puling the tiller
toward me, I. E. trying to head the boat away from the wind to starboard,
which is this lee or weather helm? Is the opposite true? If I was pushing
the tiller award me, I. E. trying to head the boat into the wind to port...
I be confused.
Also in light air, I am balanced. I have issues only as the wind picks up,
I'm trying to understand the dynamics. I know I need to roll in some of the
genny to stabilize the boat.
Joe
W/V/ Whisper
-----Original Message-----
From: Roger Pihlaja [mailto:cen09402@centurytel.net]
Sent: Tuesday, August 27, 2002 8:12 AM
To: rhodes22-list@rhodes22.org
Subject: [Rhodes22-list] Balanced Helm
Mary Lou, Joe, Et All,
If you are having lee helm with the 175% genoa in light air, then consider
trying the following before you lengthen the forestay:
Slack off slightly on the mainsail's outhaul on the boom. This will
increase the fullness or maximum draft in the mainsail's shape. In light
air, increasing the draft on the mainsail will power it up relative to the
genoa, which should move the sail plan's center of effort aft & thus
decrease your lee helm. (& make you go faster as well!) The downside is
that the new sail shape will be less forgiving of sail trimming & helmsman
errors. i.e., the "groove" will be narrower.
+
Tighten up the mainsail's leech line. This will cause the mainsail's leech
to curve ("hook") to windward. This will cause the mainsail's center of
effort to move aft, which will decrease lee helm.
+
Make certain you are using the main sheet & traveller properly. Watch your
mainsail's leech telltales to be certain you are not overtrimming the
mainsail, thus causing the airflow to stall. If you stall the airflow over
the mainsail, the sail plan's center of effort will move forward & increase
lee helm.
+
Make certain you are not overtrimming the genoa. The exhaust airflow coming
off an overtrimmed genoa will blanket the mainsail & induce the airflow on
the leeward side of the mainsail to stall. See above bullet point
If these techniques solve your light air lee helm issues; then, it will be
better than permanently raking the mast further aft, which will increase
weather helm under all conditions. Remember, these sail shape adjustments
are subtle & a little bit of sail shape or sail trim change can have a
significant effect.
Good luck!
Roger Pihlaja
S/V Dynamic Equilibrium
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<DIV><SPAN class=833265316-28082002><FONT face=Arial color=#0000ff
size=2>That'll help the mental block.</FONT></SPAN></DIV>
<DIV><SPAN class=833265316-28082002><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=833265316-28082002><FONT face=Arial color=#0000ff
size=2>Joe</FONT></SPAN></DIV>
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B> Toad the Wet Sprocket
[mailto:sprocket80@hotmail.com]<BR><B>Sent:</B> Wednesday, August 28, 2002 12:47
PM<BR><B>To:</B> rhodes22-list@rhodes22.org<BR><B>Subject:</B> RE:
[Rhodes22-list] Balanced Helm<BR><BR></FONT></DIV>
<DIV>
<DIV>
<P>Joe,</P>
<P> There several ways to describe the same
condition. I have the same problem with understeer and oversteer when
setting race car suspensions up. Lee helm and Weather helm are
as simple to remember as their names. If you need to hold the tiller to
the weather side of the boat (side toards the wind) you have "weather
helm".<BR><BR>Todd aka "Sprocket" ....not Toad</P></DIV>
<DIV></DIV><BR>
<DIV>Please respond to <A
href="mailto:sprocket80@hotmail.com">sprocket80@hotmail.com</A></DIV>
<DIV></DIV>
<DIV> </DIV>
<DIV></DIV>
<DIV></DIV>
<DIV></DIV>
<DIV></DIV>From: "Ware, Joseph W." <JOSEPH_WARE@MERCK.COM>
<DIV></DIV>Reply-To: rhodes22-list@rhodes22.org
<DIV></DIV>To: "'rhodes22-list@rhodes22.org'" <RHODES22-LIST@RHODES22.ORG>
<DIV></DIV>Subject: RE: [Rhodes22-list] Balanced Helm
<DIV></DIV>Date: Tue, 27 Aug 2002 08:28:29 -0400
<DIV></DIV>
<DIV></DIV>As long as we are here, help me get it straight. I have a mental
block with
<DIV></DIV>lee and weather helm. If the wind is coming over the port side, I am
on a
<DIV></DIV>port tack. If the boat is trying to head into the wind, I. E. bow to
port,
<DIV></DIV>and I am sitting on the high side, the port side, and I am puling the
tiller
<DIV></DIV>toward me, I. E. trying to head the boat away from the wind to
starboard,
<DIV></DIV>which is this lee or weather helm? Is the opposite true? If I was
pushing
<DIV></DIV>the tiller award me, I. E. trying to head the boat into the wind to
port...
<DIV></DIV>
<DIV></DIV>I be confused.
<DIV></DIV>
<DIV></DIV>Also in light air, I am balanced. I have issues only as the wind
picks up,
<DIV></DIV>I'm trying to understand the dynamics. I know I need to roll in some
of the
<DIV></DIV>genny to stabilize the boat.
<DIV></DIV>
<DIV></DIV>Joe
<DIV></DIV>W/V/ Whisper
<DIV></DIV>
<DIV></DIV>-----Original Message-----
<DIV></DIV>From: Roger Pihlaja [mailto:cen09402@centurytel.net]
<DIV></DIV>Sent: Tuesday, August 27, 2002 8:12 AM
<DIV></DIV>To: rhodes22-list@rhodes22.org
<DIV></DIV>Subject: [Rhodes22-list] Balanced Helm
<DIV></DIV>
<DIV></DIV>
<DIV></DIV>Mary Lou, Joe, Et All,
<DIV></DIV>
<DIV></DIV>If you are having lee helm with the 175% genoa in light air, then
consider
<DIV></DIV>trying the following before you lengthen the forestay:
<DIV></DIV>
<DIV></DIV>Slack off slightly on the mainsail's outhaul on the boom. This will
<DIV></DIV>increase the fullness or maximum draft in the mainsail's shape. In
light
<DIV></DIV>air, increasing the draft on the mainsail will power it up relative
to the
<DIV></DIV>genoa, which should move the sail plan's center of effort aft &
thus
<DIV></DIV>decrease your lee helm. (& make you go faster as well!) The
downside is
<DIV></DIV>that the new sail shape will be less forgiving of sail trimming &
helmsman
<DIV></DIV>errors. i.e., the "groove" will be narrower.
<DIV></DIV>
<DIV></DIV>+
<DIV></DIV>
<DIV></DIV>Tighten up the mainsail's leech line. This will cause the mainsail's
leech
<DIV></DIV>to curve ("hook") to windward. This will cause the mainsail's center
of
<DIV></DIV>effort to move aft, which will decrease lee helm.
<DIV></DIV>
<DIV></DIV>+
<DIV></DIV>
<DIV></DIV>Make certain you are using the main sheet & traveller properly.
Watch your
<DIV></DIV>mainsail's leech telltales to be certain you are not overtrimming the
<DIV></DIV>mainsail, thus causing the airflow to stall. If you stall the airflow
over
<DIV></DIV>the mainsail, the sail plan's center of effort will move forward
& increase
<DIV></DIV>lee helm.
<DIV></DIV>
<DIV></DIV>+
<DIV></DIV>
<DIV></DIV>Make certain you are not overtrimming the genoa. The exhaust airflow
coming
<DIV></DIV>off an overtrimmed genoa will blanket the mainsail & induce the
airflow on
<DIV></DIV>the leeward side of the mainsail to stall. See above bullet point
<DIV></DIV>
<DIV></DIV>
<DIV></DIV>If these techniques solve your light air lee helm issues; then, it
will be
<DIV></DIV>better than permanently raking the mast further aft, which will
increase
<DIV></DIV>weather helm under all conditions. Remember, these sail shape
adjustments
<DIV></DIV>are subtle & a little bit of sail shape or sail trim change can
have a
<DIV></DIV>significant effect.
<DIV></DIV>
<DIV></DIV>Good luck!
<DIV></DIV>
<DIV></DIV>Roger Pihlaja
<DIV></DIV>S/V Dynamic Equilibrium
<DIV></DIV>
<DIV></DIV>
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<DIV></DIV>Notice: This e-mail message, together with any attachments, contains
information of Merck & Co., Inc. (Whitehouse Station, New Jersey, USA) that
may be confidential, proprietary copyrighted and/or legally privileged, and is
intended solely for the use of the individual or entity named in this message.
If you are not the intended recipient, and have received this message in error,
please immediately return this by e-mail and then delete it.
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