Announcements
New Discussions
Worrell 1000 Ground Crew Finder
by John Williams. 02/18/20 06:50 PM
Bringing back the cat
by dave mosley. 02/03/20 08:12 AM
Worrell 1000
by John Williams. 01/29/20 04:38 PM
F85SR Concept Boat
by phill. 01/29/20 03:44 AM
Previous Thread
Next Thread
Print Thread
Rate Thread
Hop To
Nacra 5.5Uni - F17 or F18 square top work? #278037
03/19/15 04:26 PM
03/19/15 04:26 PM
Joined: Apr 2002
Posts: 195
White Bear Lake, MN
h17racer Offline OP
member
h17racer  Offline OP
member

Joined: Apr 2002
Posts: 195
White Bear Lake, MN
I am curious to learn if anyone has tried an F17 or F18 square top sail on a 5.5 Uni?

Mast length is more similar with an F17 and I am aware the "F" sails require a boom.

Thanks, Tom G

Last edited by h17racer; 03/19/15 06:00 PM.
-- Have You Seen This? --
Re: Nacra 5.5Uni - F17 or F18 square top work? [Re: h17racer] #278038
03/19/15 05:34 PM
03/19/15 05:34 PM

M
MN3
Unregistered
MN3
Unregistered
M



i own 2 f18 sails that i have used on my mystere 5.5 (30' mast)
a gen 1 and a gen 2 capricorn sail

they worked well, were very powerful upwind but lacked size for downwind sans spin
(the sail is designed to be used w a spin downwind)

i like them both very much but don't use them anymore unless my main is in the shop getting repaired

Re: Nacra 5.5Uni - F17 or F18 square top work? [Re: h17racer] #278039
03/19/15 07:41 PM
03/19/15 07:41 PM
Joined: Jan 2005
Posts: 6,046
Sebring, Florida.
Timbo Offline
Carpal Tunnel
Timbo  Offline
Carpal Tunnel

Joined: Jan 2005
Posts: 6,046
Sebring, Florida.
Are you saying the 'stock' Mystery 5.5 sail has more sail area than the F18, square top sail? I would think any square top would project more sail area than the equivalent pin top? I know my F16 square top main has a LOT more sail area up high were you want it, than my Prindle 18 pin top. In fact, I run the Prindle pin head in big wind, just because it has so much LESS sail area up high.


Blade F16
#777
Re: Nacra 5.5Uni - F17 or F18 square top work? [Re: h17racer] #278046
03/20/15 06:51 AM
03/20/15 06:51 AM

M
MN3
Unregistered
MN3
Unregistered
M



nope, the f18 has more sail area

but i dont sail stock sails
i use cut down tornado sails or other custom sails i have had made.

Re: Nacra 5.5Uni - F17 or F18 square top work? [Re: h17racer] #278074
03/23/15 08:11 AM
03/23/15 08:11 AM

M
MN3
Unregistered
MN3
Unregistered
M



and the stock mystere sails has lots of roach and was designed for upwind and downwind sailing

the f-18 has no roach and is designed for upwind sailing and spin assist downwind

Re: Nacra 5.5Uni - F17 or F18 square top work? [Re: ] #278075
03/23/15 08:14 AM
03/23/15 08:14 AM
Joined: Nov 2011
Posts: 381
SE MI / NE IN
rehmbo Offline
enthusiast
rehmbo  Offline
enthusiast

Joined: Nov 2011
Posts: 381
SE MI / NE IN
Originally Posted by MN3
the f-18 has no roach and is designed for upwind sailing and spin assist downwind


Perhaps I'm ill-informed, but I thought the amount of roach was defined by drawing a line from the end of the boom to the top of the mast and looking at the ratio of sail area that is beyond that line. If that's the case, I'd say the square-tops are very "roachy"


Jeff R

H18, C2 USA1193
cramsailing.com
crescentsail.com
Re: Nacra 5.5Uni - F17 or F18 square top work? [Re: rehmbo] #278077
03/23/15 08:53 AM
03/23/15 08:53 AM

M
MN3
Unregistered
MN3
Unregistered
M



let me re-phrase that
the mystere sail has a lot more roach than an f18 sail

PS i am not sure but i would think that roach is measured from the clew and head of the sail, not the boom / mast, but could be wrong
Originally Posted by rehmbo
Originally Posted by MN3
the f-18 has no roach and is designed for upwind sailing and spin assist downwind


Perhaps I'm ill-informed, but I thought the amount of roach was defined by drawing a line from the end of the boom to the top of the mast and looking at the ratio of sail area that is beyond that line. If that's the case, I'd say the square-tops are very "roachy"

Last edited by MN3; 03/23/15 08:55 AM.
Re: Nacra 5.5Uni - F17 or F18 square top work? [Re: ] #278078
03/23/15 09:00 AM
03/23/15 09:00 AM
Joined: Nov 2011
Posts: 381
SE MI / NE IN
rehmbo Offline
enthusiast
rehmbo  Offline
enthusiast

Joined: Nov 2011
Posts: 381
SE MI / NE IN
Originally Posted by MN3
PS i am not sure but i would think that roach is measured from the foot and head of the sail, not the boom / mast, but could be wrong


Yup - I think you're probably right. I had made an assumption in my mind that the sail is attached at the end of the boom and top of mast, but you know what they say about assumptions smile


Jeff R

H18, C2 USA1193
cramsailing.com
crescentsail.com
Re: Nacra 5.5Uni - F17 or F18 square top work? [Re: h17racer] #278079
03/23/15 11:06 AM
03/23/15 11:06 AM
Joined: Oct 2002
Posts: 307
maui
jollyrodgers Offline
enthusiast
jollyrodgers  Offline
enthusiast

Joined: Oct 2002
Posts: 307
maui
i was under the impression that all the area aft of a line between a point on the head,usually where you attach the halyard, and the clew is considered roach. So a square top has most of it's roach at the top and a H16 sail or Shark sail has the roach distributed lower down the leech.


Re: Nacra 5.5Uni - F17 or F18 square top work? [Re: h17racer] #278381
04/14/15 06:48 AM
04/14/15 06:48 AM
Joined: Jun 2006
Posts: 431
Netherlands
DennisMe Offline
addict
DennisMe  Offline
addict

Joined: Jun 2006
Posts: 431
Netherlands
I modded an existing square top to fit my Nacra 5.2.
But I selected it so that the boom length was almost perfect to start with so I could simply remove a horizontal section and go sailing asap.
Worked well. Check the Texel rating sheets (floating out on the internet somewhere) for measurements, they will give you some idea of what kind of sails may be suitable.
Take note that the sails are either cut for floppy masts or masts with diamonds. Be sure to get a sail cut for a mast with diamonds.


Moderated by  Damon Linkous 

Search

Who's Online Now
0 registered members (), 34 guests, and 152 spiders.
Key: Admin, Global Mod, Mod
Newest Members
wgilmour, Jacob7876, Wozza, kvc0615, CaptainAhab
8007 Registered Users
Top Posters(30 Days)
phill 1
Forum Statistics
Forums26
Topics22,375
Posts266,972
Members8,007
Most Online1,650
Sep 10th, 2019
--Advertisement--
Powered by UBB.threads™ PHP Forum Software 7.7.1