New Posts New Posts RSS Feed: Spinnaker pole uphaul
  FAQ FAQ  Forum Search   Register Register  Login Login

Spinnaker pole uphaul
 Post Reply Post Reply Page  12>
Author
  Share Topic Share Topic  Topic Search Topic Search  Topic Options Topic Options
womble12345 View Drop Down
Groupie
Groupie


Joined: 14 Apr 09
Online Status: Offline
Posts: 99 		Post Options Post Options   Quote womble12345 Quote  Post ReplyReply Direct Link To This Post Topic: Spinnaker pole uphaul
    Posted: 29 Sep 09 at 2:04pm

A friend with an old fireball is annoyed that to adjust pole height he has to adjust 2 ropes (the pole uphaul and pole downhaul). Can anyone explain some kind of 'one string' pole height system that when pulled it pulls the pole uphaul and releases the pole downhaul and when released it pulls the pole downhaul and releases the pole uphaul.

A solution is to have the pole downhaul loose enough that it is taut when the pole is in its highest position but this means that the pole can fly up when the pole is set lower. I am sure other symetrical classes have similar problems.

Thanks
Back to Top
Merlinboy View Drop Down
Really should get out more
Really should get out more


Joined: 03 Jul 06
Location: United Kingdom
Online Status: Offline
Posts: 3169 		Post Options Post Options   Quote Merlinboy Quote  Post ReplyReply Direct Link To This Post Posted: 29 Sep 09 at 2:22pm

you can set up an elastic downhall system, but it depends on the type of class as to the system.  It might be worth him posting on the fireball forum to see hwat other sailors are currently using.
Back to Top
Guests View Drop Down
Guest Group
Guest Group
Post Options Post Options   Quote Guests Quote  Post ReplyReply Direct Link To This Post Posted: 29 Sep 09 at 2:28pm

A bit of elastic:-

 

http://www.draycotewater.co.uk/fleets/fireball/html/rigging_ -_spinnakers_-_the_pol.html

 

The last part refers to the downhaul.
Back to Top
timnoyce View Drop Down
Really should get out more
Really should get out more
Avatar

Joined: 05 Aug 04
Location: Hampshire
Online Status: Offline
Posts: 1991 		Post Options Post Options   Quote timnoyce Quote  Post ReplyReply Direct Link To This Post Posted: 29 Sep 09 at 2:31pm
As Merlin says, putting in a bungee system on the downhaul is the easiest option. This also keeps the system neat when not in use as it is pulled tight and out of the way.

You can also put a cleat into the system so that it can be adjusted to take up the slack in the system for when you are on the extremes of up or down. When we used to fit out boats at Hartleys the very basic cruising boats had a plain bungee system, but anyone interested in racing seriously had the adjustment on the downhaul as well.
BEARFOOT DESIGN
Cherub 2648 - Comfortably Numb
Back to Top
kanga View Drop Down
Far too distracted from work
Far too distracted from work


Joined: 09 Oct 07
Online Status: Offline
Posts: 248 		Post Options Post Options   Quote kanga Quote  Post ReplyReply Direct Link To This Post Posted: 29 Sep 09 at 2:32pm
Yes as above, elastic is usually the best way, make sure it strong enough elastic to hold the pole down, but obviously not so strong that when you unclip the pole, when breeze, it pings back and hits you in the face!
Back to Top
winging it View Drop Down
Really should get out more
Really should get out more
Avatar

Joined: 22 Mar 07
Online Status: Offline
Posts: 3958 		Post Options Post Options   Quote winging it Quote  Post ReplyReply Direct Link To This Post Posted: 29 Sep 09 at 2:48pm
Originally posted by kanga

Yes as above, elastic is usually the best way, make sure it strong enough elastic to hold the pole down, but obviously not so strong that when you unclip the pole, when breeze, it pings back and hits you in the face!


I have a small scar about half an inch higher than my eyebrows and smack in the middle of my forehead.  The bleeding was impressive...
the same, but different...

Back to Top
womble12345 View Drop Down
Groupie
Groupie


Joined: 14 Apr 09
Online Status: Offline
Posts: 99 		Post Options Post Options   Quote womble12345 Quote  Post ReplyReply Direct Link To This Post Posted: 29 Sep 09 at 3:35pm

He already has the elastic takeaway along with an adjustment to take up the slack in the downhaul, the problem is when he lowers the pole he also has to tighten the downhaul slack takeupper otherwise the pole shoots skyward. There must be a way that is similar to the Merlin one string raking system that eases one rope when you pull another?
Back to Top
stuarthop View Drop Down
Really should get out more
Really should get out more


Joined: 22 Dec 04
Location: Nottingham
Online Status: Offline
Posts: 1040 		Post Options Post Options   Quote stuarthop Quote  Post ReplyReply Direct Link To This Post Posted: 29 Sep 09 at 3:59pm

All the new winder fireballs just have a rope down from the pole to a turning block on the floor it goes through the block and then has a knot at the maximum height the pole will ever need to lift. Its then dead ended onto about a meter run of elastic.

It doesn't need anything else as the sheets and twinning lines help stop the pole lifting and the pole is normally set pretty high in the fireball.

Thats how mine is set up and i've never had an issue with it. Hope that helps.

Back to Top
timnoyce View Drop Down
Really should get out more
Really should get out more
Avatar

Joined: 05 Aug 04
Location: Hampshire
Online Status: Offline
Posts: 1991 		Post Options Post Options   Quote timnoyce Quote  Post ReplyReply Direct Link To This Post Posted: 29 Sep 09 at 4:21pm
Originally posted by womble12345

He already has the elastic takeaway along with an adjustment to take up the slack in the downhaul, the problem is when he lowers the pole he also has to tighten the downhaul slack takeupper otherwise the pole shoots skyward. There must be a way that is similar to the Merlin one string raking system that eases one rope when you pull another?



It sounds like the elastic being used may well be too thin, or has become pre-stretched. From experience, when setting it up you need to be using a 6mm elastic, and you will struggle to get the knot into it as it will be fighting you! As Stu says, a lot of the control also comes from the sheets and twinners so the pole shouldn't really be skying unless it is seriously windy.
BEARFOOT DESIGN
Cherub 2648 - Comfortably Numb
Back to Top
womble12345 View Drop Down
Groupie
Groupie


Joined: 14 Apr 09
Online Status: Offline
Posts: 99 		Post Options Post Options   Quote womble12345 Quote  Post ReplyReply Direct Link To This Post Posted: 29 Sep 09 at 4:49pm

I think replacing and thickening the elastic would just make it harder for the crew to get the pole onto the mast so I dont think that is a good solution.

Thanks, I will tell him to just put up and shut up moaning.
Back to Top
 Post Reply Post Reply Page  12>

Forum Jump Forum Permissions View Drop Down

Bulletin Board Software by Web Wiz Forums® version 9.665y
Copyright ©2001-2010 Web Wiz
Change your personal settings, or read our privacy policy