Model Boat Mayhem

Please login or register.

Login with username, password and session length.
Pages: [1]   Go Down

Author Topic: Help wanted: rope hawser fitting in Portgarth  (Read 3444 times)

Southern Sailor

  • Southern Sailor
  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 196
  • Location: Cape Town, South Africa
Help wanted: rope hawser fitting in Portgarth
« on: March 28, 2013, 11:39:03 am »

Good day all.  Firstly, in the attached sketch of a rope hawser fitting, does the bulwark wall go in position 1 or 2?  I am trying to fit it to a GRP hull and, if in position 1, then do you have to  make the "inner flange" smaller that the outer to get it through the opening but still be able to locate it against the "outer flange"?  Secondly, I am using styrene strip to form the window fames in the wheelhouse - any tips on how to bend the styrene strip at the corners?  Thanks and happy sailing. Brian
Logged

Howard

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 1,200
  • Location: Scotter Lincolnshire
Re: Help wanted: rope hawser fitting in Portgarth
« Reply #1 on: March 28, 2013, 12:53:13 pm »

Hi Brian,
 1 should be on inside of bulwark then slip on outer ring in out side once glue has hardend file back to the outer ring, seconly pull styrene strip between your fingers  or put in some hot water but not boiling for a few seconds should make it a lot easier to bend into the corners.
                 Regards Howard.
Logged

Bryan Young

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 6,883
  • Location: Whitley Bay
Re: Help wanted: rope hawser fitting in Portgarth
« Reply #2 on: March 28, 2013, 09:48:15 pm »

Hi. After a bit of thought,I think both of you are wrong.
The "thing" in the first sketch should have the parallel "pipe" bit cut off.
Then the remaining part should be rounded off to match the other.
Then the bit that has the groove in it should be cut down at the bottom of the groove.
Then 2 flanges should be made. One for the inside of the bulwark and the other for the outer section.
Obviously, a filler piece of some sort will have to be fitted to fill the gap.
The outer portion should be "narrower" than the inner part.
These things are horrendously difficult to make. Especially when they are of oval section....as most of them are.
Commonly called "Panama Leads"...they allow a rope/wire to change direction without chafing.
Good luck. BY.
Logged
Notes from a simple seaman

Bryan Young

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 6,883
  • Location: Whitley Bay
Re: Help wanted: rope hawser fitting in Portgarth
« Reply #3 on: March 28, 2013, 10:05:47 pm »

Sorry, having re-read that post.......
I should have said that the bit that is on the outboard side (with a flange) protrudes less than the inboard one does. The inboard part also has little cast fillets (4) around the grooved bit.. BY.
Logged
Notes from a simple seaman

Howard

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 1,200
  • Location: Scotter Lincolnshire
Re: Help wanted: rope hawser fitting in Portgarth
« Reply #4 on: March 28, 2013, 10:25:20 pm »

Bryan, If you read my post I think that was what I was trying to say. but then I have only used Mobile marine models.
                 Regards Howard.
Logged

Southern Sailor

  • Southern Sailor
  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 196
  • Location: Cape Town, South Africa
Re: Help wanted: rope hawser fitting in Portgarth
« Reply #5 on: March 29, 2013, 11:35:24 am »

Hi Howard and Bryan.  Thanks for your input.  Firstly, the "thing" is a cross section of the rope hawser supplied by MMM.  Secondly my feeling is that:
 
  • the radius of the inside needs to be outboard.  THis allows the rope to change direction without chafing (as mentioned by Bryan).
  • the bulwark sits in position 1 so that the two flanges are positioned, one outboard and one inboard of the bulwark (I have never seen two "flanges" outboard of the bulwark).  This will require a reduction of the size of the inboard flange to allow the fitting to go through the opening and still be retained against the outer flange.
  • gussets are then placed on the outside of the inboard pipe section of the fitting for strength (of the real thing).  I am not sure what the additional flange is that was supplied with the fitting, although Bryan does mention an extra flange.
Anyway, that is how I see it.  Perhaps I should ask MMM.  I did not want to bother them but they are always helpful and, after all, they made it!
 
Cheers for now. Brian
Logged

Bryan Young

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 6,883
  • Location: Whitley Bay
Re: Help wanted: rope hawser fitting in Portgarth
« Reply #6 on: March 29, 2013, 05:58:07 pm »

Oh dear. I just knew that this would get a bit awkward!
I really should have posted the pic in my first reply.
Didn’t mean to upset anyone.
I presume the original question was about the sort of fairlead that is fastened to a bulwark rather than side rails and stanchions. The pic on the left is the free standing sort fitted where there’s no bulwark. The one on the right fastens to the inboard side bulwark by either welding or rivetting.
The “bulwark type This sort generally has a half-round rim on the outboard surface.
The “depth” of the thing is ultimately decided by the size of rope/wire it’s designed to handle. So that could be anywhere from 4” to a foot or more.Rather than making some from scratch…..see if you can find a yacht chandler who sell small cringles, could be the easiest solution. Just a thought. Cheers. BY.
Logged
Notes from a simple seaman

kmmbcwebmaster

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 116
  • Location: Sutton-in-Ashfield
    • Kingsmill MBC
Re: Help wanted: rope hawser fitting in Portgarth
« Reply #7 on: March 29, 2013, 06:26:15 pm »

hi hope this helps these rope haws are fitted to my eurogirl and also have them on my eldergarth tug and have been fitted as per plans
Ron
Logged
just tugging along

Howard

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 1,200
  • Location: Scotter Lincolnshire
Re: Help wanted: rope hawser fitting in Portgarth
« Reply #8 on: March 29, 2013, 06:39:44 pm »

Just like I said, Thats how I fitted mine on my Canning M.M.M. might of made them a little bit simpler for ease of fit but I think thats how thay ment them to be fitted, And Bryan sorry I knew you was only trying to be as helpful as you can  as we all do on here your a much more talanted modle maker then I,ll ever be so take all your points on board.
                    Regards Howard.
Logged

Southern Sailor

  • Southern Sailor
  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 196
  • Location: Cape Town, South Africa
Re: Help wanted: rope hawser fitting in Portgarth
« Reply #9 on: March 31, 2013, 06:49:20 am »

Thanks guys.  You have been very helpful.  I have much to learn and will post a sketch of the way I see it showing the installed item and the bulwark, when I return from holiday.  Happy sailing. Brian
Logged

Southern Sailor

  • Southern Sailor
  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 196
  • Location: Cape Town, South Africa
Re: Help wanted: rope hawser fitting in Portgarth
« Reply #10 on: April 09, 2013, 08:55:32 pm »

Ok Guys.  MMM confirms what you have been telling me and the radiussed inner is going inboard.  Like I said I have much to learn.  Thanks and happy sailing. I will post some pics when I have made some progress. Brian
Logged
Pages: [1]   Go Up
 

Page created in 0.232 seconds with 17 queries.