#1 2020-09-29 18:59:21

Marc_Langbroek
Member
From: Den Helder, Netherlands
Registered: 2019-03-04
Posts: 15

Dimensions of a Gennaker.

Dear readers,

As I am looking for some completions of the sail wardrobe I am musing about buying a Gennaker.
As there are lots of used ones for sale, it is key to know the dimensions of the sail.

Does anyone has experiences wit the gennaker, and is there information available regarding dimensions for a Frances 26, sloop rigged.

Hoping on some reply,

Marc Langbroek
Frances 26 "Grace Darling".

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#2 2020-10-24 20:06:50

Marc_Langbroek
Member
From: Den Helder, Netherlands
Registered: 2019-03-04
Posts: 15

Re: Dimensions of a Gennaker.

Good evening to all,

The search for the right gennaker has ended with the purchase of a second hand, hardly used Gaastra one.
The dimensions are luff 9.00 m leech 8.00 and a foot of 5.00 meter.

When choosing not to order a new sail, but looking for a secondhand one, finding the right dimensions is important to decide what to buy. Second hand ones are usually given with dimension, specs and condition, so reconstructing them and fitting them on a scale drawing and then choosing the best fit / esthetical looks was the way I made my decision.

Is this the smartest way? Maybe not, but at least its less expensive as than buying new. When you're lucky halyards and sheets come along with  the sail. (Which wasn't the case with my purchase)

Finding the blocks, halyard and sheets is not that big a problem, although the costs are mounting quickly.

The result? See for yourself! I do hope that this year we do get a quiet day to do a little experimenting with the new cloth!!

1603565718_tekening_klein.jpg
1603566926_gennaker_2_klein.jpg
1603566978_gennaker_3_klein.jpg
1603567008_gennaker_1_klein.jpg




Marc Langbroek
S/Y Grace Darling

Last edited by Marc_Langbroek (2020-10-24 20:21:52)

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#3 2020-10-25 13:18:12

Jonathan_Hopper
Member
Registered: 2004-03-23
Posts: 101

Re: Dimensions of a Gennaker.

Looks fabulous.

Very interested in this.   Keep us posted.  Did you have to put a block on the mast for the halyard or was it existing?   How have you rigged the sheets?   Where did you buy the sail from?

JDH

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#4 2020-10-25 18:32:29

Marc_Langbroek
Member
From: Den Helder, Netherlands
Registered: 2019-03-04
Posts: 15

Re: Dimensions of a Gennaker.

Jonathan,

The gennaker is a second hand one, and in pristine condition. I bought it via a very popular Dutch website called marktplaats (marketplace). The former owner told me he had used her two or three times. When handling the sail she crackles like a fresh bag of chips. The typical spinnaker cloth crackle.
For the halyard, I'll have to attach a new block on the masttop, in a way that the luff is in front of the jib furler. There is already a slot available by means of a D shaped attachment. I just tested it with the halyard of the storm jib, see pictures above. Also the tack has to be positioned in front of the furler drum, attached to the starboard flange of the anchor roller.  To prevent the tack line from chafing at the pulpit one can make use of a clew tack. A device that's been clamped around the furled jib above the drum and leads the luff or line first straight up before it can swing out. 
The sheets are being measured by two times ships length, and that 2 times. A whole bunch of rope attached to the clew of the gennaker by means of a soft shackle made of dyneema. The way of operating a gennaker is when half or abaft winds, up till force 4, while maneuvering best be done by gybing. (Hence the long sheets).
The 10 mm sheets are lead thru a pulpit mounted block straight back to the Andersen winch.
Packing can be done by means of a long tube kind of bag called a snuffer. I choose for the 'bag launching methode' . Therefor I've sewed two plastic snap hooks on the topside of the bag, so I can clip it on the guard rail, as well as for hoisting as for retrieving it back.

Reading it all back it sounds confident. Well, we all know that the proof of the pudding...

I'll keep you posted after some serious sailing with the new configuration.

Marc.

Last edited by Marc_Langbroek (2020-10-25 19:38:08)

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