Mast head crane

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bambam
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Mast head crane

Postby bambam » Thu Sep 12, 2013 7:13 pm

Hi guys after breaking my mast head/main halyard crane at the weekend i ordered a new one from ovington. It turned and was a different shape from the old one.

Spoke to ovingtions they said it had changed.

Has the class modified this?

Should it be on the evolution of musto page?

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Rick
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Re: Mast head crane

Postby Rick » Fri Sep 13, 2013 8:30 am

It's all been published on the website and enews and Facebook and twitter :D

http://www.mustoskiff.com/sub-pages/sel ... pdates.htm

It's also the most recent listing in the product evolution guide.

http://www.mustoskiff.com/sub-pages/pro ... lution.htm
Rick Perkins. GBR

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Re: Mast head crane

Postby DangerBoy » Fri Sep 13, 2013 12:40 pm

How easy is it to re-move the new mast crane and move the knot regularly?

The dead end of the halyard still has to make a pretty abrupt turn over the lip of the crane. Would it not be easier to develop a crane where the dead end sticks directly out the top - I think Russ Clarke has his original mast crane modified like that (by Paul or Rick?) and he said he suffered much less problems with chafe.
Mark

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Rick
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Re: Mast head crane

Postby Rick » Fri Sep 13, 2013 1:42 pm

DangerBoy wrote:How easy is it to re-move the new mast crane and move the knot regularly?

The dead end of the halyard still has to make a pretty abrupt turn over the lip of the crane. Would it not be easier to develop a crane where the dead end sticks directly out the top - I think Russ Clarke has his original mast crane modified like that (by Paul or Rick?) and he said he suffered much less problems with chafe.


If you click the link titled "(See a series of images featuring the new crane - showing how to rig a 2:1 halyard)" on the above page you get this:

http://www.mustoskiff.com/sub-pages/S3- ... -Crane.pdf

Looks pretty simple and keeps the who design symmetrical which has to be a good thing ...

Selden believe this is the best solution so lets see how this works out ...
Rick Perkins. GBR

bambam
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Re: Mast head crane

Postby bambam » Fri Sep 13, 2013 4:06 pm

cool thanks

MUST OF MISSED THAT! :oops:

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Rick
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Re: Mast head crane

Postby Rick » Fri Sep 13, 2013 5:28 pm

bambam wrote:cool thanks

MUST OF MISSED THAT! :oops:



:D no sweat ... if you don't get the eNews letters you can sign up here:

http://www.mustoskiff.com/sub-pages/newsletter-group.htm

Good to ask because possible others missed it too ...
Rick Perkins. GBR

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Re: Mast head crane

Postby Daniel Henderson » Fri Sep 13, 2013 7:25 pm

I have found the new mast crane awful! Duncan from ovis had a look at the euros and couldnt get the knot down the hole for it to lock in place, and even if you did you wouldnt be able to get it out easily. Also the main halyard wears through much faster because the crane doesnt hang over the back of the rig any more the 2:1 halyard rubs against each other as you pull the sail up, wearing the main halyard the whole way down. This really should have been tested before put on all the new rigs, as far as i knoiw i was the first to use it.
GBR557

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paul manning
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Re: Mast head crane

Postby paul manning » Fri Sep 13, 2013 9:03 pm

Dan

You weren't the first, there have been a number supplied before you had a replacement top section.

We've asked Selden to explain how to use the system further.
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Re: Mast head crane

Postby DangerBoy » Sun Sep 15, 2013 10:27 am

Rick wrote:
DangerBoy wrote:How easy is it to re-move the new mast crane and move the knot regularly?

The dead end of the halyard still has to make a pretty abrupt turn over the lip of the crane. Would it not be easier to develop a crane where the dead end sticks directly out the top - I think Russ Clarke has his original mast crane modified like that (by Paul or Rick?) and he said he suffered much less problems with chafe.


If you click the link titled "(See a series of images featuring the new crane - showing how to rig a 2:1 halyard)" on the above page you get this:

http://www.mustoskiff.com/sub-pages/S3- ... -Crane.pdf

Looks pretty simple and keeps the who design symmetrical which has to be a good thing ...

Selden believe this is the best solution so lets see how this works out ...


I saw the link, but with the symmetry that way then not only do you end up with a sharp bend in the rope, but all the halyard you pull up also rubs on the dead end wearing out the outer.

also the old system at least could be maintained without taking the mast crane on and off!

Why can't the dead end go out the top of the crane?
Mark

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Re: Mast head crane

Postby paul manning » Sun Sep 15, 2013 11:38 am

We've asked Selden to confirm the questions arising here.
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bambam
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Re: Mast head crane

Postby bambam » Sun Sep 15, 2013 8:17 pm

Had a bit of a play with the fitting and a bit of 4mm rope afters dans post,

I can see why we/selden have changed this and i think the ongoing development is great within the class, to make the boat even better!

But this is what i found.

When the mast is down i like to put a new knot at the top every 3 months or so, so i tried doing this, i found it a pain to get the knot out and a a bigger pain to get it back in, and this was without the fitting being fixed to the mast. Also i found that with the knot inside the fitting was rubbing the halyard going down the mast.

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Re: Mast head crane

Postby chriswrightlaser » Sun Sep 15, 2013 11:25 pm

looking at the pictures on the link it looks like there is enough room to drill a 4.5mm hole in the top part like the current one. is that worth a go as my new boat should come with new type of mast head crane soon?
I always cut 10mm off my main halyard every week as the cleat was very sharp, some used sandpaper when the boats were new but some mps boats now need new cleats as they slip with ware, my boat has always worked perfect as I use a three meter too long halyard and cut the 10mm off all the time,I left the cleat well alone, the ware on the rope changes position with every 10mm cut also stops failure on the top of the halyard.
Never see many mps with any problems in general, mine has just worked from day 1, is the mod more for the earlier boats or earlier boats than mine 385?

Chris

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paul manning
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Re: Mast head crane

Postby paul manning » Mon Sep 16, 2013 8:50 am

Chris - all the cranes have been of one design up until this new design coming into place around summer 2012.
The report from Selden confirms the reasons and thinking behind this design change. The key problem was the depth that the casting went into the carbon top section.

The problem with drilling a hole in the top of the crane is that it no longer overhangs the aft face of the mast tube, so it'll likely be forward of the back radius of the sheave.

I hope that helps.
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Serega
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Re: Mast head crane

Postby Serega » Mon Sep 16, 2013 9:10 am

paul manning wrote:Chris - all the cranes have been of one design up until this new design coming into place around summer 2012.


I think, there had been some modifications before. At Lee On Solent this year I compared my one (456) with Nigel's and they were different. On mine the hole was too small that effectively prevented moving my sheave to the outer position because the halyard was rubbing against the edge making a hell of a friction.

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Re: Mast head crane

Postby DangerBoy » Mon Sep 16, 2013 12:37 pm

chriswrightlaser wrote:looking at the pictures on the link it looks like there is enough room to drill a 4.5mm hole in the top part like the current one.
Chris


Is this a legal pimp?
Mark


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