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461 Feathering Prop - Rope Cutter - Tip

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John Allison View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote John Allison Quote  Post ReplyReply Direct Link To This Post Posted: 17 January 2006 at 18:05

Hi Alain,

Sorry if I viewed your prop as the two blader - but you've got my views of our Flex O Fold now anyway.

I am happy to be corrected by anyone who has more engineering expertise than I, but understand the issue of not enough space to fit a rope cutter is due to the length of the prop boss.

I'd be pretty sure one could take any of the props back to the prop manufacturer, explain the problem, and have them carefully machine the back end of the boss to make it shorter and therefore  allow room for the cutter to be inserted twix boss and saildrive.  It would mean a shorter length of spline overlapped on shaft and boss - but most such devices are over engineered anyway so such changes may be possible.

It's just a pain to do this kind of thing - so investing £150 in a dive tank is my easier solution to any rope on prop issues we may experience!

Cheers

JOHN

PS  Did 3,500 miles last year in mainly coastal / fishing areas and only rope we ever caught was into the truster when leaving a dock - but we are off further east this summer so wished to ensure we had a means of freeing anything from the prop - if we have to!!  



Edited by John Allison - 17 January 2006 at 18:07
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Alain & Anne View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Alain & Anne Quote  Post ReplyReply Direct Link To This Post Posted: 17 January 2006 at 18:26
Hi John

100% with you: machining the back end of the prop is not an issue!!
But my concern is much more what you are paying for and the way Yanmar try to swap a bad design for a good rule is a problem.
I asked different provider to calculate a propeller in different configuration and all of them but Flex O Fold give a diameter of more than 18 inches!
For exemple if you give the Volvo D2-55 which is 55hp at 3000 rev they recommend a 19 inches prop.
I don't know if I have more engineering expertise than you, but I don't like this type of issue.
By the end of the day the ponny tank is a neccesity because  when you get a net in your prop with a rope cutter you could be free but it is a full mess around the shaft!

Cheers

Alain
UHAMBO 430e#004
White hull-teck deck-Yanmar 55hp-long range cruising
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Our blog: www.uhambo.fr

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taduka View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote taduka Quote  Post ReplyReply Direct Link To This Post Posted: 22 January 2006 at 10:57

Hi All

check this site http://www.ropestripper.com/ which may solve your issues. i have it installed on my current boat with a volvo foldoing prop and will surely install one when i get my hanse. the concept is simple and it works fine.  I have had this product on each boat i owed and must say has always proved itself. they do have a yanmar version

Shawn 

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John Allison View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote John Allison Quote  Post ReplyReply Direct Link To This Post Posted: 22 January 2006 at 12:19

Hi Taduka,

Really appreciate the suggestion but not sure adding the sail drive shaft extended would still meet Yanmar's requirements to keep warranty in place.  Be worth you chacking that before buying one for your pending Hanse.

In all events - it's too late for me. The alternate of pony tank has already been shipped so thats the solution I'll go with.

Cheers

JOHN

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taduka View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote taduka Quote  Post ReplyReply Direct Link To This Post Posted: 22 January 2006 at 16:54

Hi John

Ropecutter fits in the sacrificial anode so you are not extending the shaft by no means. what is this pony tank option??

Shawn

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Alain & Anne View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Alain & Anne Quote  Post ReplyReply Direct Link To This Post Posted: 22 January 2006 at 21:36
Hi All

Went on the site. They claimes they are "approved" by Yanmar Volvo and Bukh for saildrive fitting.
Apparently to fit it wtih the Flex O Fold prop used on Hanse 461 one would need to get the prop machined to have space betwwen the prop and the sacrificial anode.
To Taduka: is your actual boat equipped with a saildrive unit?
Because the web site doesn't give much information about fitting on a folding prop equipped saildrive!

Cheers

Alain
UHAMBO 430e#004
White hull-teck deck-Yanmar 55hp-long range cruising
OCC

Our blog: www.uhambo.fr

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John Allison View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote John Allison Quote  Post ReplyReply Direct Link To This Post Posted: 23 January 2006 at 09:26
Originally posted by taduka taduka wrote:

Hi John

Ropecutter fits in the sacrificial anode so you are not extending the shaft by no means. what is this pony tank option??

Shawn

Hi Taduka,

Please see Alaines response above on the fitting of a rope cutter.  My advice also is one cannot be fitted with the Yanmar Saildrive and still retain the Yanmar Warrantly (for what thats worth).

The Pony Tank is a mini dive tank with a breathing regulator attached directly.  It allows one to dive for up to 15 minutes at shallow depth - enough to allow me to get under and cut free any rope etc.

Sourced from the USA these are only US240 shipped to the EU - so they are a cost effective solution also.

Cheers

JOHN 

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taduka View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote taduka Quote  Post ReplyReply Direct Link To This Post Posted: 25 January 2006 at 18:47

hi Alain

yes i have a volvo sail drive and you do need to machine the prop but it;s a minor surgical operation (it only costed about $10). As far as warranty is concerned, i don;t really give a crap as it's mentioned you always have to show euros!!

Shawn

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John Allison View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote John Allison Quote  Post ReplyReply Direct Link To This Post Posted: 30 January 2006 at 16:46

Receipted the small pony tank - summary report on main Hanse Chat.

JOHN

 

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