First 31.7 stability curve

[cookjwm]

I just cannot seem to get hold of one ! any ideas? Thanks

 

[Lakesailor]

well all the ones I see seem to fall over if the wind gets above 5 mph.

 

[Aja]

That\'s not a 31.7

However - they all seem to need bodies to windward....

Donald

 

[office_sailor]

Have you asked the builders? They will have the information, and they really should be ok about releasing it.

 

[cookjwm]

lake sailor :quite right but thats not one -twin rudders!
Donald: right again!
Office sailor: yes, but cannot find it anywhere on web site, suppose I'll have to ask nicely....

 

[Lakesailor]

Good point. It's a 21.7.
I didn't notice.
Must be a family trait

 

[Sailfree]

I have always requested and been supplied AVS curves but most AWB's are disappointingly about 120 deg for vanishing stability. A few are better but often have a very deep keel.

It is one aspect that the manufacturers are not targeting those who would welcome an AWB about 135 to 140deg AVS.

 

[Aja]

You\'ll Get Over It..

Size isn't everything - so I've been told.

Donald

 

[xstucker]

The RYA/RORC show this info. but there is no graph, just the AVS and STIX
Manufacturer: BENETEAU LOA: 9.48
Model or Description: FIRST 31.7 GTE LWL: 8.7
Version: Beam: 3.21
Weight: 3626
RYA ID no: 2185
Sail Dimensions Stability Data
FL: 12.4 FLY: - RYA Calculated SSSN: - ISO 12217
P: 10.67 PY: - RORC Calculated - AVS 131
E: 3.84 EY: - RORC SSSN with FSR: - ISO 12217 STIX: 31

Model or Description: FIRST 31.7 PTE LWL: 8.71
Version: STANDARD KEEL Beam: 3.23
Weight: 4234
Sail Dimensions Stability Data
FL: 12.42 FLY: - RYA Calculated SSSN: - ISO 12217
P: 10.8 PY: - RORC Calculated - AVS 127
E: 3.9 EY: - RORC SSSN with FSR: - ISO 12217 STIX: 30


Simon

 

[Sans Bateau]

Fun down wind though /forums/images/graemlins/laugh.gif /forums/images/graemlins/laugh.gif

First 31.7

 

[xstucker]

I am sure you have checked these web sites out, but it is worth posting the question on their form. The Norway one has the Polars and the Holland one has the Ops Manual. I think the Stability Curve is in one of the Owner Manuals (if it is like my 33.7), so if you post the question on thier Owners Forum, someone should be able to give you a copy.

http://www.first317.no/html/home.html
http://www.jachtschilders.nl/first317/

Simon

 

[cookjwm]

OH YES!. Actually got a curve form a kind contributor on the first 31.7 site, full of good stuff for these