C.7.2 (2) relating to Replacement fittings

Use this section to ask any questions over current class rules or to make suggestions over new rules that may be worthy of consideration.
Thor
Posts: 19
Joined: Thu Jan 12, 2012 2:56 pm
So I know you are a real person not a spambot please enter the middle number from the below list (i.e. 3): 3
Location: Perth, Australia - A Musto Must.

C.7.2 (2) relating to Replacement fittings

Postby Thor » Wed Jan 15, 2014 12:47 am

Hello All.

I have a questions relating to the below rule:
C.7.2 FITTINGS
(2) Cleats, blocks and fittings supplied by any manufacturer may be
replaced in the same position as the standard fitting or as close as
structurally possible. Replacement cleats shall be substantially the
same size and design. Replacement blocks shall have the same
number of sheaves of a similar diameter.


Are able to replace blocks with the below:
http://www.sailingbits.com/fittings/acc ... imble.html

Thanks

Thor
Thor
AUS 513

Chris Henderson
Posts: 99
Joined: Tue Jan 22, 2008 1:59 pm
So I know you are a real person not a spambot please enter the middle number from the below list (i.e. 3): 5

Re: Question relating to Replacement fittings C.7.2 FITTINGS

Postby Chris Henderson » Wed Jan 15, 2014 8:32 pm

Hi Thor, thanks for the email regarding Antal rings. The rule states you can change blocks for any make with a similar size sheave. The main word here is block which is classed as a housing holding either a pulley or a sheave therefore, the Antal rings are not actually a block, but a pulley or sheave, which is not the same, so is not allowed.
Just to let you know, we have tried using these Antal rings on a Musto, in place of blocks, but were found to have higher friction loads than the supplied blocks, and made sailing harder work, so I would not recommend them anyway.
I hope this answers your question.
Regards
Chris Henderson

Thor
Posts: 19
Joined: Thu Jan 12, 2012 2:56 pm
So I know you are a real person not a spambot please enter the middle number from the below list (i.e. 3): 3
Location: Perth, Australia - A Musto Must.

Re: Question relating to Replacement fittings C.7.2 FITTINGS

Postby Thor » Thu Jan 16, 2014 3:12 am

Thanks for the quick response. Understood.

Thor
Thor
AUS 513

justo
Posts: 66
Joined: Fri Mar 06, 2009 8:02 am

Re: C.7.2 (2) relating to Replacement fittings

Postby justo » Tue Aug 04, 2015 10:13 am

Hi, i am using 6mm spinnaker sheet and can see harken rachet 55 are so big, for this diameter. Can I use harken rachet 40? Can be considered similar diameter?
Thanks

User avatar
Rick
Site Admin
Posts: 3128
Joined: Tue Nov 01, 2005 3:48 pm
So I know you are a real person not a spambot please enter the middle number from the below list (i.e. 3): 3
Location: Millbank, UK
Contact:

Re: C.7.2 (2) relating to Replacement fittings

Postby Rick » Tue Aug 04, 2015 10:36 am

justo wrote:Hi, i am using 6mm spinnaker sheet and can see harken rachet 55 are so big, for this diameter. Can I use harken rachet 40? Can be considered similar diameter?
Thanks


Doesn't everyone use 6mm kite sheets?

http://www.mustoskiff.com/sub-pages/rope-list.htm

I believe 6mm is the standard and works well with the supplied ratchets.
Rick Perkins. GBR

Chris Henderson
Posts: 99
Joined: Tue Jan 22, 2008 1:59 pm
So I know you are a real person not a spambot please enter the middle number from the below list (i.e. 3): 5

Re: C.7.2 (2) relating to Replacement fittings

Postby Chris Henderson » Tue Aug 04, 2015 10:58 am

I would consider similar size to be within 3mm as this is the difference in sheave size between all the major manufacturers so a difference of 15mm is in my opinion not of a similar size so would not be allowed. Chris

User avatar
sten
Posts: 223
Joined: Tue Nov 01, 2005 4:40 pm

Re: C.7.2 (2) relating to Replacement fittings

Postby sten » Tue Aug 04, 2015 11:33 am

I think the original holt and then ronstan ratchet blocks where smaller diameter.
with a smaller ratchet block you eat through gloves worth upgrading to the harken ones / similar larger diameter
to save money on gloves.

User avatar
paul manning
Posts: 1983
Joined: Tue Oct 09, 2007 10:02 am
So I know you are a real person not a spambot please enter the middle number from the below list (i.e. 3): 3
Contact:

Re: C.7.2 (2) relating to Replacement fittings

Postby paul manning » Tue Aug 04, 2015 6:04 pm

The originally supplied Holt Allen auto ratchet blocks were 52mm.

The fit out was then changed to Harken and these are 57mm. This is the auto ratchet block now being supplied.

Ronstan currently produce a 55mm auto ratchet block.

Allen currently still produce the 52mm auto ratchet block.
Paul Manning
MSCA Secretary

Phone 0044 (0)7843 269353
Fax 0044 (0)1621 785735
paulsmanning01@gmail.com
http://www.mustoskiff.com

Bruce
Posts: 170
Joined: Thu Aug 16, 2007 3:08 pm
So I know you are a real person not a spambot please enter the middle number from the below list (i.e. 3): 5
Location: UK

Re: C.7.2 (2) relating to Replacement fittings

Postby Bruce » Tue Aug 04, 2015 11:44 pm

Rick wrote:Doesn't everyone use 6mm kite sheets?

I think that needs updating. The boats come with 7mm or 8mm these days (Excel Fusion, I think), which is what many seem to use.
Bruce
GBR534

User avatar
Rick
Site Admin
Posts: 3128
Joined: Tue Nov 01, 2005 3:48 pm
So I know you are a real person not a spambot please enter the middle number from the below list (i.e. 3): 3
Location: Millbank, UK
Contact:

Re: C.7.2 (2) relating to Replacement fittings

Postby Rick » Wed Aug 05, 2015 9:10 am

Bruce wrote:
Rick wrote:Doesn't everyone use 6mm kite sheets?

I think that needs updating. The boats come with 7mm or 8mm these days (Excel Fusion, I think), which is what many seem to use.


I will check what is standard currently. 6mm is more that enough IMHO.
Rick Perkins. GBR

DangerBoy
Posts: 338
Joined: Sat Mar 17, 2012 1:57 pm
So I know you are a real person not a spambot please enter the middle number from the below list (i.e. 3): 3
Location: Burghfield SC

Re: C.7.2 (2) relating to Replacement fittings

Postby DangerBoy » Wed Aug 05, 2015 9:59 am

I prefer 7mm if i'm honest (although i have a double taper), but then I use the smaller 40mm Ronstan ratchet blocks, better to stand on and almost half the price of the Harken ones.

http://www.v-rigger.com/epages/es140267.sf/en_GB/?ObjectPath=/Shops/es140267/Products/RF46101

In response to Chris - when i asked about this in the past it was allowed (i emailed you about it) as it performs a similar function, i was just told to expect higher loads but if i could cope with that then fine. Your thought at the time was "I dont feel you are gaining any advantage at all so I dont have a problem but think you may find in a good blow that you had stayed with the bigger blocks so maybe spending a little more money would prove in the end to have been a good move"

In response to Sten - if you use the rubberized grip gloves i think its the kite halyard that shreds these more. I switched to the Gill Pro ones and they have been bullet proof, easily half a season a pair

http://www.v-rigger.com/epages/es140267.sf/en_GB/?ObjectPath=/Shops/es140267/Products/GILL7451/SubProducts/GILL7451-0001
Mark

User avatar
Rick
Site Admin
Posts: 3128
Joined: Tue Nov 01, 2005 3:48 pm
So I know you are a real person not a spambot please enter the middle number from the below list (i.e. 3): 3
Location: Millbank, UK
Contact:

Re: C.7.2 (2) relating to Replacement fittings

Postby Rick » Wed Aug 05, 2015 11:39 am

Bruce wrote:
Rick wrote:Doesn't everyone use 6mm kite sheets?

I think that needs updating. The boats come with 7mm or 8mm these days (Excel Fusion, I think), which is what many seem to use.


Thanks Bruce; this has now been updated.

http://www.mustoskiff.com/sub-pages/rope-list.htm

Image
Rick Perkins. GBR

User avatar
paul manning
Posts: 1983
Joined: Tue Oct 09, 2007 10:02 am
So I know you are a real person not a spambot please enter the middle number from the below list (i.e. 3): 3
Contact:

Re: C.7.2 (2) relating to Replacement fittings

Postby paul manning » Wed Aug 05, 2015 12:02 pm

Reference the discussion on 'similar' diameter blocks, can I suggest we add this to an agenda for a skippers meeting and then go forward with any necessary changes?

Personally, I think the word 'similar' is open to interpretation and cannot be measured.

Perhaps we should consider:

1. Having a +/- tolerance from the standard supplied block
2. Quantifying what 'similar' is
3. Other
Paul Manning
MSCA Secretary

Phone 0044 (0)7843 269353
Fax 0044 (0)1621 785735
paulsmanning01@gmail.com
http://www.mustoskiff.com

DangerBoy
Posts: 338
Joined: Sat Mar 17, 2012 1:57 pm
So I know you are a real person not a spambot please enter the middle number from the below list (i.e. 3): 3
Location: Burghfield SC

Re: C.7.2 (2) relating to Replacement fittings

Postby DangerBoy » Wed Aug 05, 2015 12:29 pm

I'd like a pretty quick response to this as i want to know if i need to now go a needlessly replace my blocks before Garda or risk not measuring.
Mark

User avatar
paul manning
Posts: 1983
Joined: Tue Oct 09, 2007 10:02 am
So I know you are a real person not a spambot please enter the middle number from the below list (i.e. 3): 3
Contact:

Re: C.7.2 (2) relating to Replacement fittings

Postby paul manning » Wed Aug 05, 2015 1:02 pm

Mark I suggest you need to drop Chris a mail to confirm.

I've mailed ISAF to enquire if there is a current interpretation of 'similar' as other classes use this.

As mentioned above, in my opinion if it isn't clear the class would be better to discuss how to make it clear and Riva would seem a good gathering of minds.
Paul Manning
MSCA Secretary

Phone 0044 (0)7843 269353
Fax 0044 (0)1621 785735
paulsmanning01@gmail.com
http://www.mustoskiff.com


Return to “Class Rules”

Who is online

Users browsing this forum: No registered users and 2 guests