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<META content=3D"A Truer Tale of Telltales" name=3DDC.title>
<META content=3D"Shevy Gunter" name=3DDC.creator>
<META content=3D"sailboat, Laser, racing, telltale use, telltale =
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name=3DDC.description ADVANTAGES=3D"" USE=3D"" LTD.=3D"" TOPICS=3D"" =
AND=3D"" TELLING=3D""=20
BY=3D"" OF=3D"" ABOUT=3D"" PLACEMENT=3D"" TALES?=3D"" GENTRY=3D"" =
TELLTALES=3D"" TUFTS.?=3D""=20
THE=3D"" COVERED=3D"" INCLUDE=3D"" SAILS.=3D"" ON=3D"" WB-SAILS=3D"">
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            <CENTER><B><FONT face=3D"Verdana, Arial, Helvetica, =
geneva"><FONT=20
            size=3D-1><!-- Excerpts from text goes here -->What=20
            experts<BR>write<BR>reveal that<BR>some of WLB-Sails=20
            suggestions<BR>about telltales<BR>should only be =
taken<BR>with a=20
            grain<BR>of salt. </FONT></FONT></B></CENTER></TD>
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                <TD><FONT face=3D"Times, Times New Roman" =
color=3D#000088>
                  <H1>A Truer Tale of=20
            Telltales?</H1></FONT></TD></TR></TBODY></TABLE><FONT=20
            face=3D"Verdana, Arial, Helvetica, geneva" =
size=3D2>by<BR><EM>Shevy=20
            Gunter</EM></FONT> </CENTER></TD></TR></TBODY></TABLE>
      <P>
      <CENTER><IMG height=3D30=20
      =
src=3D"http://www.arvelgentry.com/Telltales/A%20Truer%20Tale%20of%20Tellt=
ales_files/{8B7A9D09-771A-11D3-AB9F-ACEB26279833}_985.gif"=20
      width=3D490></CENTER>&nbsp;<BR>
      <HR SIZE=3D1>
      This article is basically an addition to and a commentary on the =
article=20
      titled <A href=3D"http://www.arvelgentry.com/Telling_tales.htm"=20
      target=3D_self>"Telling Tales"</A> by <EM>WB-SAILS Ltd.</EM>. So, =
you must=20
      read that article (which contains an excellent treatment) =
first...<BR>
      <HR SIZE=3D1>

      <P>Some statements made by <EM>WB-SAILS</EM> in the "Telling =
Tales"=20
      article may be misleading, or questionable. Either my own =
experience, or=20
      what experts in sail trim, sailmaking, and aerodynamics write =
reveals that=20
      some of their suggestions should be taken with a grain of salt. =
Below,=20
      these questionable statements in the article are provided along =
with=20
      alternative views of the truth:=20
      <DL>
        <DT><STRONG>1) "In the mainsail telltales are only needed in the =

        leech."</STRONG>=20
        <DD>Nothing can be further from the truth! The <EM>WB-SAILS</EM> =

        document is written for sloop rigged yachts where the genoa =
overlap may=20
        render this statement partially agreeable, but the fact of the =
matter is=20
        that <EM>the more airflow attachment you have to a mainsail, the =
more=20
        power you generate</EM>. So, it is important to determine =
whether you=20
        have attachment in forward parts of the mainsail, too.=20
        <P>If you consider a cat-rigged boat ,such as the single-handed =
dinghies=20
        like the <EM>Laser</EM>, or a sloop rigged boat with a blade =
(100% jib),=20
        or a sloop rigged boat broad reaching (with a genny or a =
spinnaker) the=20
        questionable nature of the statement is obvious.=20
        <P><STRONG><A =
href=3D"http://www.arvelgentry.com/Who_is_Arvel_Gentry.htm"=20
        target=3D_self>Arvel Gentry</A></STRONG>, <A name=3Dgentry>an=20
        aerodynamicist</A> and sailor who "wrote the book" on how sails =
work,=20
        telltales, and sail trim would surely disagree with this. Arvel =
Gentry=20
        is the scientist to first figure out (correctly) how sails =
produce lift.=20
        So, I will mention his name often in the remainder of these =
comments. To=20
        find out more about him, just click on his name above. Here is =
what=20
        Gentry says about the "slot effect" topic (with my interjections =
in=20
        regular font) in a series of articles published in SAIL magazine =
in=20
        1973:=20
        <BLOCKQUOTE>&nbsp;&nbsp;&nbsp;"<EM>In the case of a mainsail =
alone,=20
          the stagnation streamline comes in on the windward side of the =
sail,=20
          causing an upwash</EM> (forcing the airflow to turn towards =
the=20
          leeward side)... <EM>We get a very a high suction peak (large =
negative=20
          pressure) as the air tries the make the sharp turn around the =
mast to=20
          the lee side.... The pressure then starts to increase =
rapidly... The=20
          boundary layer will not withstand this steep increase in =
pressure, the=20
          flow will separate, and the mainsail airfoil will be in a =
stalled=20
          condition... The jib reduces the upwash on the main (gives the =
main a=20
          header). The primary effect of the jib is to cause =
<STRONG>reduced=20
          </STRONG>velocities over the forward-lee part of the main, =
rather than=20
          increases velocities. The slower velocities in turn give =
reduced=20
          pressure gradients that help prevent separation and stall</EM> =
(on the=20
          main) <EM>rather than some higher speed =
'revitalization'.</EM>"=20
        </BLOCKQUOTE>So, as you see, the goal behind using a jib or a =
genny is=20
        partially to prevent separation and stalling on the=20
        <STRONG>forward-leeward</STRONG> part of the mainsail. And not =
putting=20
        telltales on the main forward of the leech is tantamount to =
saying "I=20
        don't care about either the main lift or the slot effect".=20
        <P>A further point is that <STRONG>mainsail trim affects the =
wind seen=20
        by the genoa!</STRONG> Arvel Gentry points out:=20
        <BLOCKQUOTE>&nbsp;&nbsp;&nbsp;"<EM>The flow about any lifting =
airfoil=20
          can be thought of as the addition of a <STRONG>circulation=20
          flow</STRONG> and a non-circulating flow... The direction of =
the=20
          circulation flow goes forward over the windward surface, =
around the=20
          luff and then toward the rear on the lee side of the =
airfoil... Note=20
          that the circulation flows for the jib/genoa and the main=20
          <STRONG>oppose</STRONG> and tend to cancel each other out in =
the slot=20
          between the jib and the main. This fact tells us that we will =
not get=20
          all the increased air speed in the slot that is claimed by the =

          old</EM> ("Venturi Effect") <EM>theories... Some of the air =
that we=20
          would think might go through the slot is actually diverted by =
the=20
          combined circulation flows so that it goes on the leeward side =
of the=20
          genoa instead."=20
          <P>"The high velocities created by the mainsail in the region =
of the=20
          genoa leech in effect end up causing increased velocities and =
reduced=20
          pressures all along the <STRONG>lee side of the =
genoa</STRONG>... So,=20
          the main increases the upwash (a lifting wind shift) for the =
jib. This=20
          gives the genoa its great drive and also helps keep the =
lee-side genoa=20
          flow from separating. Proper mainsail trim is very important =
in=20
          getting the most out of the genoa.</EM>" </P></BLOCKQUOTE>So, =
the way=20
        you trim <EM>all</EM> of your mainsail significantly affects the =
flow on=20
        the lee side of the genny, and this is the second reason why you =
should=20
        have additional telltales on your main forward of the leech.=20
        <P><STRONG>Where do you put them?</STRONG> The answer depends on =
whether=20
        you have a sloop or a cat-rigged boat.<BR>&nbsp;<BR>
        <DL>
          <DT><STRONG>For a sloop:</STRONG>=20
          <DD>We need to talk about the vertical and horizontal =
positions of=20
          each telltale. Vertically, position three of them at about =
1/4, 2/4,=20
          and 3/4 of the luff length. You need to make absolutely sure =
that they=20
          are (horizontally) in line with your leech telltales. =
Otherwise, the=20
          comparison of the conditions at the leech versus forward is =
much=20
          tougher, and also the time needed by the main-trimmer to check =
the=20
          telltale behavior becomes much longer. With unaligned leech =
and=20
          forward telltales, the trimmer can no longer rely on =
peripheral vision=20
          and must look at each telltale specifically. So, you either =
need to=20
          move your leech telltales, or position the forward telltales =
directly=20
          in line with them (taking into account the above vertical =
spacing=20
          suggestion).=20
          <P>What I mean by" horizontally in line" is <EM>not</EM> along =
the=20
          diagonal sail seams. It's not even along any "horizontal" =
draft lines=20
          that may exist on your mainsail. These draft lines are not =
actually=20
          truly horizontal -- by which I mean <EM>parallel to the =
horizon</EM>--=20
          when your boat heels. At the dock, just put the main up, sheet =
it in=20
          tight, and heel the boat by hiking or by yanking on the jib =
halyard=20
          from abeam. You will see that a straight draft line will look =
like=20
          going down at the luff and going up at the leech! So, make =
sure your=20
          forward telltales will be truly at the same level as the leech =

          telltales when your boat is sailing at its normal racing heel =
in=20
          medium winds.=20
          <P>To determine the horizontal positioning of these three =
forward=20
          telltales, now put your genny up at the dock, sheet it in =
tight, and=20
          mark with some tape the projection of the genoa leech on the =
mainsail=20
          at the aforementioned 1/4, 2/4, and 3/4 luff-length heights. =
The=20
          telltales should be about one foot further aft of the mainsail =
luff=20
          than these marks.=20
          <P>If you have a fractionally rigged boat, make sure that the =
top=20
          telltale is not any closer to the luff than three times the =
mast width=20
          along the for-and-aft axis. A more precise method of =
determining the=20
          most forward acceptable position is described below.=20
          <P>Finally, note that these telltale positions are appropriate =
for=20
          upwind sailing only when you have the slot effect. For reaches =
and=20
          runs, in which the main starts acting more or less like a =
cat-boat=20
          mainsail, the telltales should be even more foreward. But this =
topic=20
          will be treated later after reviewing some other comments made =
by=20
          <EM>WB-SAILS</EM>.<BR>&nbsp;<BR></P>
          <DT><STRONG>For a cat-boat:</STRONG>=20
          <DD>For a boat without a genny, the forward mainsail telltales =
are=20
          located more forward as they become the "steering telltales". =
But=20
          before I discuss this, we need to consider the validity of =
other=20
          statements made by <EM>WB-SAILS</EM>.<BR>&nbsp;<BR></DD></DL>
        <DT><STRONG>2) "The stalling of the lower [mainsail leech] =
telltales may=20
        also indicate that your jib is sheeted too loosely, and causes =
the=20
        airflow to separate from the leeward of the main. Closing the =
gap by=20
        moving the jib lead forward or changing into a larger genoa will =
help."=20
        </STRONG>
        <DD>The fact of the matter is that the existence of a jib or a =
genny has=20
        NO impact on the flow of air around the mainsail leech! Flow =
streamlines=20
        around mainsail/genny combinations determined by Analog Field =
Plotters=20
        in laboratory conditions reveal that at about two-thirds of the=20
        cord-length distance from the luff to the leech of the mainsail, =
you=20
        have exactly identical flow streamlines on the leeward side of =
the main=20
        either with a genny or without a genny. Arvel Gentry points out =
that:=20
        <BLOCKQUOTE>&nbsp;&nbsp;&nbsp;"<EM>At this point, we have about =
the=20
          same airspeeds when we have a jib and main as we had for the =
main=20
          alone... In fact, on the surface of the main itself, we have a =

          slightly higher pressure (less negative) and therefore lower=20
          velocities when the jib is used than occurs without the jib... =
But in=20
          both cases, the distribution of pressure along the aft =
one-third of=20
          the lee of the main is very even... The boundary layer does =
not like=20
          <STRONG>rapid</STRONG> increases in pressure and it tends to =
separate=20
          under these conditions...</EM>" (So, there can be no =
separation at the=20
          leech of the main caused by the genoa trim because the genoa =
does not=20
          cause the pressures around the main leech to change rapidly!)=20
        </BLOCKQUOTE>The proper trimming response to stalling mainsail =
leech=20
        telltales is to adjust the main trim, not the genoa trim. If the =
leech=20
        telltales are stalling and the luff telltales are not, you have =
a leech=20
        flow separation problem caused by the leech hooking too far to =
windward.=20
        The proper response is to tighten the outhaul first, and then =
the=20
        cunningham to let the leech fall off a bit. The idea here is =
that when=20
        you apply tension to any edge of the sail, the other edges of =
the sail=20
        will fall off some. In addition, the traveler may need to come =
down very=20
        slightly, too. But this will have drastic impacts on the general =
angle=20
        of attack of the main, and will affect not only the luff =
telltales on=20
        the mainsail, but also (via the "circulation flow") the genoa =
trim! For=20
        details, see the article titled <A=20
        href=3D"http://www.arvelgentry.com/A_Trim_Primer.htm" =
target=3D_self>"A Trim=20
        Primer for Main and Headsail Balance"</A>.=20
        <P></P>
        <DT><STRONG>3) "The very luff of the sail nearly always has a =
separation=20
        bubble on one side or the other which is why the telltales =
shouldn't be=20
        installed too close to the luff.... Two pairs of steering =
telltales=20
        should be installed in the luff of the sail approximately ten to =
twenty=20
        inches behind the luff rope... In small boats the telltales =
should be=20
        nearer to the luff than in bigger boats." </STRONG>
        <DD>The first sentence is absolutely correct, but what is "too =
close to=20
        the luff"? I interpret the range provided as "ten inches for =
small=20
        boats, twenty inches for large boats". Also, the figures shown =
in the=20
        <EM>WB-SAILS</EM> article depict the telltales quite aft of the =
luff.=20
        <P>The idea is simply that a telltale which is always within the =

        separation bubble caused by the headstay and the luff tape for =
the=20
        genoa, or by the mast for the mainsail, is useless for steering =
or sail=20
        trim purposes. But how about a telltale that is so far forward =
that it=20
        is out of the separation bubble in 50% of the conditions -- say =
not in=20
        light winds but in higher winds. Such a telltale provides =
valuable=20
        information for correct steering in these higher wind =
conditions.=20
        <P>For instance, on a J-27, a telltale as far forward as only =
three=20
        inches from the genny luff is always out of any turbulence =
except in=20
        very light air (0 to 3 knots apparent.) On a Laser, the mainsail =
luff=20
        telltales are out of the separation bubble caused by the =
circular mast=20
        when they are as close as six inches from the aft edge of the =
sail=20
        sleeve as long as the apparent wind is above 4 knots. So, all =
the=20
        airflow information that you could gather by placing telltales =
this far=20
        forward on a J-27 or a Laser would be sacrificed if you followed =
the=20
        <EM>WB-SAILS</EM> advice.=20
        <P>Telltales are cheap! So, do some experimentation: cut eight =
or nine=20
        three-inch or four-inch <EM>nylon</EM> telltale strips for each =
side of=20
        each sail. Using circular "sticky-backs", place the genny =
telltales at=20
        your current "steering telltales" height, starting at only two =
or three=20
        inches behind the luff tape. Place the mainsail telltales =
starting at=20
        around six inches behind the luff. With one-half inches of each =
telltale=20
        inserted into one-inch sticky-backs, nine three-inch telltales =
will span=20
        a total length of 34.5 inches from the luff on the genny, and =
37.5=20
        inches from the luff on the main. (Read the fuller description =
in=20
        Section 4 below before you actually put the telltales on. =
Further=20
        details are provided there.)=20
        <P>Then, go out sailing in strong air (above 15 knots) for =
twenty=20
        minutes. Properly trim your sails for upwind work using your =
regular=20
        telltales, and then check how many of the furthest forward =
telltales on=20
        the genoa are <STRONG>always</STRONG> stalled <EM>on the leeward =

        side</EM>. After you determine this, fall of ever so slightly =
(no more=20
        than one degree) and note that the most foreward short telltales =
will=20
        start stalling while the ones further aft are still drawing! =
Lower your=20
        genoa a bit and mark with a pencil or grease pen the =
sticky-backs of the=20
        telltales which were always in the separation bubble (if any). =
Then, get=20
        on a broad reach or reach on the same tack, with the genoa up =
again. Now=20
        do the same for the telltales on the mainsail. Repeat the whole =
thing on=20
        the other tack to compare results. The same number of =
stick-backs should=20
        have been marked on the two tacks.=20
        <P>After you come back from your sail, just take off the =
telltales you=20
        marked. If there are more than five shorty telltales (if you =
used=20
        four-inch telltales) or six shorty telltales (if you used =
three-inch=20
        telltales) remaining in a sequence, remove the extra ones =
starting from=20
        the leech end. Compare the position of your regular telltales =
with the=20
        most forward of the telltales remaining in each sequence. You =
will be=20
        surprised to see that the forward shorty is much more forward =
than your=20
        regular telltale. This is a measure of how much pointing =
information you=20
        were losing by the current horizontal positioning of your =
regular=20
        telltales...=20
        <P>Incidentally, the series of telltales that you just put on =
your sails=20
        are not even called telltales. They are called "<STRONG>Gentry=20
        tufts</STRONG>" after Arvel Gentry who first invented them. How =
to use=20
        these telltales? You need to wait for the next section to learn =
that...=20
        <P></P>
        <DT><STRONG>4) "It's a good idea to have two sets of steering =
telltales.=20
        One set should be installed a bit higher and closer to the luff =
than the=20
        other. The telltales further away from the luff are more =
forgiving and=20
        you should steer according to them in rough seas and in heavy =
winds. The=20
        telltales closer to the luff are more sensitive and you should =
use them=20
        in smooth seas and lighter conditions."</STRONG>=20
        <DD>The distinction between the smooth versus rough seas is =
correct. The=20
        distinction between lighter versus heavier winds is incorrect. =
Forward=20
        telltales will start working efficiently in higher winds, not in =
lighter=20
        air.=20
        <P>But that is beside the point. The main question is "why =
should we=20
        have <EM>two</EM> separate sets of steering telltales, one set =
for light=20
        winds, and one set for strong winds? What if the wind is =
"medium"? What=20
        if the wind is "medium-to-strong"? You get my point. The =
conclusion is=20
        that you need a <EM>sequence</EM> of telltales. You need the=20
        <STRONG>Gentry tufts</STRONG>. They work in all wind and chop=20
        conditions. It's just a matter of interpreting them correctly.=20
        <P>The fuller description of the Gentry tufts below relates to =
both=20
        items 3 and 4 above. The section is actually a copy of my =
response to a=20
        sailor who inquired on the WWW (<EM>Sailing World Instruction=20
        Hotline</EM>) about how to point well:=20
        <P>
        <UL compact>
          <LI>The Gentry tufts should be placed parallel to the airflow. =
(I=20
          prefer placing them so that they are horizontal when the boat =
is at=20
          its optimal heel level when sailing upwind in moderate air.) =
Arvel=20
          Gentry suggests the series of tufts are placed starting only =
2-3=20
          inches aft of the genny luff. (Better yet, you can determine =
the=20
          starting position using the experiment noted above.) The free =
part of=20
          each telltale (outside of the self-sticking circle) is only =
three or=20
          four inches long. Furthermore, the telltales should be nylon =
rather=20
          than wool. As the lead tuft right at the luff of the genny, I =
prefer=20
          using a three inch long tuft. This minimizes the chances of =
the lead=20
          tuft fouling around the luff tape or wire. The tufts in a set =
are=20
          mounted only 1 inch apart. (After putting on the lead tuft at =
the=20
          luff, I position each self-stick circle 1/8 inch aft of the =
ribbon of=20
          the next tuft forward.) The aft-most ribbon will end up =
starting=20
          somewhere around the location of a "regular" telltale. =
Finally, make=20
          sure that neither the port nor the starboard set of tufts on =
the genoa=20
          are in line with a hank.=20
          <P>The tuft system should be set up not too high (to give the =
driver a=20
          neck ache) nor too low (at least 1/4 of the luff-length up the =
tack).=20
          If you have a window on your headsail around this location, =
position=20
          your tufts across this window. (Ideally, you want a long =
window=20
          extending all the way to the luff rope.) </P>
          <LI><STRONG>Theory:</STRONG> The Gentry tufts are used to =
measure the=20
          size of the separation bubble on the leading edge of the =
headsail.=20
          When you sail at the verge of luffing, the "stagnation =
streamline"=20
          (the streamline that divides the windward and leeward side air =

          streams) comes smoothly right into the luff, and all tufts on =
the=20
          leeward side will be attached. When you bear off a tiny bit, =
the=20
          stagnation streamline will come into the genny on the windward =
side,=20
          and the boundary layer on the leeward side will not be able to =

          tolerate the slowing down of the air flow right at the luff, =
it will=20
          separate from the sail at the luff, but then reattach itself =
on the=20
          leeward side. This is when you will see the lead tuft on the =
leeward=20
          side lifting. If you continue bearing off more and more, you =
will see=20
          your 2nd, 3rd, 4th, and 5th tufts from the luff lifting one by =
one. By=20
          the time the 5th tuft (i.e., your regular telltale) lifts, you =
have=20
          footed off considerably. Regular telltales tell you that you =
are=20
          stalling after it is too late. The Gentry tufts system allows =
you to=20
          determine exactly how close to luffing versus stalling you =
are.=20
          <LI><STRONG>Use: </STRONG>Just sail with the 1st tuft on the =
leeward=20
          side slightly agitated in strong winds. In smooth water, if =
you see=20
          the 2nd tuft lifting, you are already too late! You should =
have headed=20
          up earlier. In lighter winds, the 1st tuft may be in the =
separation=20
          bubble. In this case, sail with the the second tuft slightly =
agitated.=20
          </LI></UL>Arvel Gentry claims that his tuft system works on =
boats=20
        ranging in length from 23' to 63'. I have used it successfully =
on=20
        Lasers, J-24s and J-27s.=20
        <P></P>
        <DT><STRONG>5) The telltales in the luff should be of woolen =
yarn glued=20
        onto the sail with a colorful sticky-back. </STRONG>
        <DD>The problem with woolen yarn is that it's fuzzy no matter =
how often=20
        you coat them. So, the fuzz catches on the sail seams and =
stitching.=20
        Whenever you position a telltale in a place where some seam or =
another=20
        sticky-back is within its reach, it's much more advisable to use =
nylon=20
        telltales. Furthermore, nylon telltales are much lighter than =
woolen=20
        ones so they signal better in light winds while performing =
equally well=20
        in strong winds. The only disadvantage of nylon telltales is =
that if and=20
        when they get wet, they stick on the sail, and it takes them a =
longer=20
        time than woolen tales to dry and start flying again.=20
        <P>So, telltales that are low down on the genoa luff and leech =
can be=20
        woolen, but all other telltales on keelboats should by nylon (or =
8 mm=20
        recording tape). As for dinghies that capsize quite often, the =
solution=20
        lies in fixing a few woolen ribbons as a backup system. One at =
the leech=20
        all the way up, and two in a sequence to be used as steering =
tufts=20
        (along the luff, right above your Gentry tufts) should suffice.=20
        <P></P>
        <DT><STRONG>6) "Don't use the luff telltales when looking for =
the right=20
        position for the jib lead - the information you get may be more =
harmful=20
        than beneficial." </STRONG>
        <DD>I don't get the logic behind this point at all. I have been =
putting=20
        one three-inch tuft three inches aft of the luff of the genoa =
high up=20
        along the luff (1/4 luff-length down from the head) on any boat =
I raced=20
        on. I use this tuft to set the genny sheet car position. It =
seems to be=20
        much more precise than just luffing up to see whether your genoa =
luffs=20
        high up or down low first.=20
        <P>The goal is locate the jib sheet car so that the stagnation=20
        streamlines at the top and the bottom of the genoa come into the =
sail at=20
        angles that minimize the separation bubble. So, I look at my =
Gentry=20
        tufts and start sailing so that the first one is occasionally =
agitated=20
        and the second one is drawing straight aft. The part of the =
genoa at the=20
        height of the Gentry tufts is then just shy of being at the =
verge of=20
        luffing, and it is at the verge of stalling. Then I look up to =
the=20
        <EM>leeward</EM> tuft along the luff all the way up. If it is =
stalling=20
        and twirling all the time, it means that the sail has does not =
have=20
        enough curvature at the top. It needs to twist off more. So, =
move the=20
        genoa fairlead aft a bit. If the sail is luffing up there, in =
which case=20
        the windward side tuft would be twirling, then I move the genoa =
car=20
        forward a bit. I think this is a bit more precise than luffing =
up. For=20
        further details, see <A=20
        href=3D"http://www.arvelgentry.com/A_Trim_Primer.htm" =
target=3D_self>"A Trim=20
        Primer for Main and Headsail Balance"</A>.=20
        <P>A word of caution is also necessary here: As noted above, =
both the=20
        main and the genny have "circulation flows" around them. That =
is, when=20
        you trim your main correctly, you alter the angle and velocity =
of the=20
        wind hitting the luff of the genny. So, the adjustment of the =
genoa car=20
        location is not a one-step process. Before the first race =
starts, you=20
        should sequentially adjust the genny first, then the main, then =
the=20
        genny again, and then the main again to find the correct genny =
car and=20
        mainsheet traveler car positions for the prevailing winds. For =
further=20
        details, see <A =
href=3D"http://www.arvelgentry.com/A_Trim_Primer.htm"=20
        target=3D_self>"A Trim Primer for Main and Headsail =
Balance"</A>.=20
      </P></DD></DL><!-- --------------------- END OF CONTENT =
--------------------------------- --><BR>&nbsp;<BR></FONT></TD>
    <TD width=3D"10%"><!-- Right margin -->&nbsp; =
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