Sail Area Of Class Spinnaker

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Jamie

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Topic: Sail Area Of Class Spinnaker
Posted: 08 May 2020 at 9:03am

That does help Ron. Thanks so much.

Ron Waterson View Drop Down

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Posted: 06 May 2020 at 4:34pm

Jamie,

Not sure if this will help. I just stumbled across a NS spinnaker quote for 2018 for my Laser, and remembered your question. Here is what the quote says.

Isp: 9.671m Area: 52.68m2

Spl: 3.450m

Hull 147 - Angel's Share

Jamie

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Posted: 30 April 2020 at 10:41am

Thanks John. I am going through the process of figuring out all of that now.

Unfortunately, I do not have access to my class spinnaker right now. I was hoping that someone could tell me how the OD spinnakers are sized. I have a Doyle spinnaker sold by the Montreal loft back in 2009 or 2010.

I know that I have a class OD spinnaker as I have seen pictures of my boat sailing in previous Nationals using this spinnaker.

Thanks.

I see the class rules state:

Max. Luff 10.06 M (33 ft.).

Max. Girth 5.97 M (19.59 ft).

Formula:

SF x SL/ 2 + 2(SMG - SF/ 2) SL/ 3. I have no idea what the SMG is....

where:

SF = Width of foot; measured round the edge of the sail between the lowest point on the leeches.

SL = Leech length, measured round the edge of the sail from the highest point on the sail at the head to the lowest point of the sail on the leech. If the two are not equal, SL shall be the mean of the two leech lengths.

SMG = Width at half height; shall be taken as twice the distance between the mid-point of the leech shall be determined by measuring round the edge of the sail half the length of the leech from the head.

fatjohnz

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Posted: 29 April 2020 at 7:25pm

For your PHRF you should submit the actual dimensions of your largest spinnaker and your pole length.
In the future you might investigate what could affect your rating +/-
john

Jamie

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Posted: 29 April 2020 at 4:31pm

Hi Everyone,

Does anyone know the sail area of the class spinnaker?

I read through old forum posts and they indicate that the brochure states 670 sq.ft. , "but that number is incorrect". Nowhere in the post does anyone indicate the actual number.

I need this for my PHRF certificate.

Any help is appreciated.

Thanks,

Jamie

Author	Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic
Jamie Members Profile Send Private Message Find Members Posts Add to Buddy List Crew Joined: 06 June 2018 Status: Offline Points: 48	Post Options Post Reply Quote Jamie Report Post Thanks(0) Quote Reply Topic: Sail Area Of Class Spinnaker Posted: 08 May 2020 at 9:03am
	That does help Ron. Thanks so much.

Ron Waterson Members Profile Send Private Message Find Members Posts Add to Buddy List Commodore Joined: 21 October 2014 Location: Rivals, KY Status: Offline Points: 118	Post Options Post Reply Quote Ron Waterson Report Post Thanks(0) Quote Reply Posted: 06 May 2020 at 4:34pm
	Jamie, Not sure if this will help. I just stumbled across a NS spinnaker quote for 2018 for my Laser, and remembered your question. Here is what the quote says. Isp: 9.671m Area: 52.68m2 Spl: 3.450m
	Hull 147 - Angel's Share

Jamie Members Profile Send Private Message Find Members Posts Add to Buddy List Crew Joined: 06 June 2018 Status: Offline Points: 48	Post Options Post Reply Quote Jamie Report Post Thanks(0) Quote Reply Posted: 30 April 2020 at 10:41am
	Thanks John. I am going through the process of figuring out all of that now. Unfortunately, I do not have access to my class spinnaker right now. I was hoping that someone could tell me how the OD spinnakers are sized. I have a Doyle spinnaker sold by the Montreal loft back in 2009 or 2010. I know that I have a class OD spinnaker as I have seen pictures of my boat sailing in previous Nationals using this spinnaker. Thanks. I see the class rules state: Max. Luff 10.06 M (33 ft.). Max. Girth 5.97 M (19.59 ft). Formula: SF x SL/ 2 + 2(SMG - SF/ 2) SL/ 3. I have no idea what the SMG is.... where: SF = Width of foot; measured round the edge of the sail between the lowest point on the leeches. SL = Leech length, measured round the edge of the sail from the highest point on the sail at the head to the lowest point of the sail on the leech. If the two are not equal, SL shall be the mean of the two leech lengths. SMG = Width at half height; shall be taken as twice the distance between the mid-point of the leech shall be determined by measuring round the edge of the sail half the length of the leech from the head.

fatjohnz Members Profile Send Private Message Find Members Posts Add to Buddy List Commodore Joined: 05 August 2006 Location: United States Status: Offline Points: 304	Post Options Post Reply Quote fatjohnz Report Post Thanks(0) Quote Reply Posted: 29 April 2020 at 7:25pm
	For your PHRF you should submit the actual dimensions of your largest spinnaker and your pole length. In the future you might investigate what could affect your rating +/- john

Jamie Members Profile Send Private Message Find Members Posts Add to Buddy List Crew Joined: 06 June 2018 Status: Offline Points: 48	Post Options Post Reply Quote Jamie Report Post Thanks(0) Quote Reply Posted: 29 April 2020 at 4:31pm
	Hi Everyone, Does anyone know the sail area of the class spinnaker? I read through old forum posts and they indicate that the brochure states 670 sq.ft. , "but that number is incorrect". Nowhere in the post does anyone indicate the actual number. I need this for my PHRF certificate. Any help is appreciated. Thanks, Jamie