[C320-list] Mast Cranes and Asymmetrics.

[Robert E. Sloat]

Irv-If you use a pennant, make sure it is no too long.  The length would 
depend on the cut of the asymmetric used.  If too long, then you won't be 
able to bring the tack down enough to straighten the luff which allows you 
to more efficiently sail closer to the wind.  The higher the tack, the 
farther from the wind you can sail and the lower the tack the closer you can 
sail.

On my asymmetric, for up to around 150-160 degrees apparent, the tack is 
about 5 feet up from the anchor bail.  This allows the luff to rotate to 
windward and get farther away from the main's blanket.  For closer sailing, 
60 degrees apparent with wind uder about 10 knots, the tack is around 1 1/2 
feet up from the bail.  You can notice how the luff gets straightened when 
bringing the tack down and the spinnaker is more genoa-like in shape.

Bob Sloat
Savannah 894 (2002)

----- Original Message ----- 
From: "Irv Grunes" <igrunes at comcast.net>
To: "C320-List" <c320-list at catalina320.com>
Sent: Thursday, August 16, 2007 9:19 PM
Subject: Re: [C320-list] Mast Cranes and Asymetrics.


> Allan,
> The pennant idea seems to solve the halyard chafing difficulty that some
> have experienced.
>
> Was the shackle on the pennant a "swivel type" even though there may be a
> swivel at the spinnaker head already
>
> Did you consider a stopper ball on the halyard before the actual halyard
> shackle to keep it from coming in contact with the spinnaker halyard 
> sheave
> at the top of the mast.
>
> If ever can take a pix, send it off list to
>
> igrunes at comcast.net
>
> but your pennant description is very adequate.
>
> Irv Grunes
> Isle of Wight #851
>
> -----Original Message-----
> From: c320-list-bounces at catalina320.com
> [mailto:c320-list-bounces at catalina320.com]On Behalf Of
> allan.field at comcast.net
> Sent: Monday, August 13, 2007 3:15 PM
> To: C320-List
> Subject: Re: [C320-list] Mast Cranes and Asymetrics.
>
>
> Irv - I had the WM rigger make up an 18-inch pennant of vinyl coated wire.
> One end has a swaged-on shackle that clips onto the head of the sock.  The
> other end has a swaged-on thimble that the spinnaker halyard hooks into.
> This way, any chafe at the top of the forestay or against the furler drum 
> is
> against this pennant instead of the rope halyard.  This seems to be much
> more economical than a crain.  I can take a pix and send it out next 
> weekend
> if you'd like.
>
> Hope this helps.
>
> Allan S. Field
> Sea Shadow - #808
> Columbia, MD
>
> -------------- Original message --------------
> From: "Irv Grunes" <igrunes at comcast.net>
>
>>
>> Hi,
>>
>> We are still looking at Asymetrics. Looking for any comments on my scheme
>> below to eliminte the need for a crane.
>>
>> Found this Quantun website:
>>
>> http://www.quantumsails.com/pdf/asymmetrical%20trim%20guide.pdf
>>
>> I sent this to my sailing partner:
>>
> ============================================================================
>> ===================
>>
>> BUT the Quantum article says:
>>
>> --------------------------------------------------------------
>> What equipment do I need?
>>
>> . Spinnaker halyard that is above
>>
>> the forestay.
>>
>> ------------------------------------------------------------
>>
>> I am not sure of this BUT
>>
>> I think that our forestay goes to the top of the mast.
>>
>> I think the sheave for the spinnaker halyard is below it and lets assume
>> that it is on the port side.
>>
>> Then flying an asym on the port side, the halyard would not be in contact
>> with the forestay.
>>
>> Then if jibeing the asym to the starboard side, the halyard would have to
>> cross over the forestay and would probably chafe.
>>
>> As I think about it, I think the solution would be something like our
>> backstay adjuster that has the ball on the line to keep the thimble from
>> pulling up into the sheave. If a stopper ball were put on the halyard, a
>> knot on the halyard to hold the stopper ball, and then 8 inches or so of
>> chafe guard were put on the halyard and then the shackle to the halyard.
>>
>> Then the sail would be hoisted that 8 inches or so lower, but when jibed,
>> the chafe guard would protect the halyard from the forestay.
>>
>> This would eliminate the requirement for a crane and allow us to use the
>> spinnaker halyard safely.
>>
>> I will bounce this off the list to see what response we get.
>>
>> Irv
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> -----Original Message-----
>> From: Bob Seiden [mailto:theseidens at earthlink.net]
>> Sent: Sunday, August 12, 2007 8:18 PM
>> To: Irv Grunes
>> Subject: Re: Asym's
>>
>>
>> Bob
>>
>> Requesting quotes from a lot of the lofts. Will keep you posted on the
>> quotes.
>>
>> Saw this at the quantum website. See for setting and dousing
>>
>> http://www.quantumsails.com/pdf/asymmetrical%20trim%20guide.pdf
>>
>>
>>
>> READ IT!
>>
>>
>> We want it for running in light air. That would seem to mean the middle
>> sail.
>>
>>
>> The diagrams seem to suggest that the head of the asymmetrical comes well
>> below the top of the mast. Especially with a sock, that should keep the
>> head of the sail well away from anything it could chafe on.
>>
>>
>> Quantum says absolutely nothing about a crane.
>>
>>
>> me
>>
>>
>>
>
>
>