Jump to content

Bedford

Members
  • Posts

    1,190
  • Joined

  • Last visited

Posts posted by Bedford

  1. That's a great demonstration, lovely to see it moving with all oars.

     

    If you look at the rudders on RC sailboats you'll find they are normally way oversize because scale size isn't enough so if you want scale rudders you might need to get creative like, and it's a sneaky and historically abhorrent solution but I'm sure you could get a small bow thruster to slip into probably the stern, for proper movement, to help it turn. 

  2. On the subject of rudders, I wonder if they were, in reality, more trim tabs than actual rudders, as is the case in tall ships in which the set of the sails does most of the heading work.

     

    Having had the helm on a 4 man row boat I can tell you the rudder only has any real effect when the oars are out of the water so you end up with a segmented turn.

  3. I was thinking the same as Grant, once you get the second tier of oars it should speed up, yes it's slow off the mark but then it should be.

    Before worrying about oar size I'd suggest you work out the theoretical hull speed "Hull speed can be expressed as a simple mathematical formula 1.34 X the square root of the length of the waterline (HS = 1.34 x √LWL). For instance, if a cruising sailboat has a waterline length of 36 feet, she should be able to sail 1.34 x 6, or approximately eight knots." 

    Then work out the scale speed of the boat and take it from there, mind you it's doubtful such a big rowing boat would have ever attained hull speed.

     

    As for the amount of ballast, I'd leave that as is too for now because water doesn't behave in a scale fashion so if you make it lighter it might get tossed around like a cork. The ballast helps her ride in a more scale manner. 

  4. Nice project!

     

    I've come to the party a bit late but I have a few epoxy/fiberglass tips that may be useful later or to others. 

     

    I'm currently building a 17' sail boat, yes, full size and I've made wooden RC boats.

    On the real thing I fibreglassed the bottom for mechanical protection and I worked a sheet of "peel ply" over it, this gives a uniform finish like a fine fabric weave one you pull it off after curing. You could use it on model ships if you really needed to 'glass the hull as it greatly reduces the need for sanding. However on the subject of sanding, the topsides of my current build are merely sealed in epoxy and will be painted and an old shipwright gave me the best tip ever. Use a cabinet scraper rather than sanding! It's so much quicker and easier and you can control what and how much you take off. I've been to the boatshed this morning and scraped the whole topside of the boat in about 2 hours leaving just a quick sand to go.

     

    Yes the frames are a long way apart on this model and you have found an issue with that. In that case I think I would have cut patches of light fibreglass to fit between the frames and epoxied them in on the inside. Hopefully the thickened epoxy you've added will do the job but a sanding filler in epoxy makes it thicker but weaker. You can buy other fillers that will retain the strength. I hope I haven't worried you with that but if I were you I'd be floating it again with enough ballast to bring it to its lines and leave it for a few hours. Better you find a failure in the tub than on a lake.

  5. 5 hours ago, Keith Black said:

     Steve, she's a beautiful little rig. Wish I was there to help as I'd love to make or help make something that neat and pleasing to the eye. 

    Keith, I mentioned a while back that I had to find a new place to live and a big deciding factor in moving here was the Lake Macquarie Classic Boat Association. A "Mens Shed" type arrangement, we are a group of like minded retirees that like messing around with small boats and we can build boats for ourselves with the help of many hands including a couple of shipwrights. It's a great environment and there's always something new to learn be it boat related or not.

  6. Well it's been quite a while between drinks on this build, mainly because I just haven't been happy with the chain plates and couldn't see a solution so I walked away. I have also been somewhat engrossed in a slightly bigger project.....

     

    I found a viable solution to the chain plate issue and was given an Amati shroud rigging jig which I promptly threw away but kept the pins. It didn't suit the lay of the shrouds on this ship and what's the use of a jig that doesn't let you mount the dead eyes until it's off the jig. I centre drilled each pin and inserted a length of 1mm brass wire so I could measure up the shrouds, drill holes in a jig for the pins and fully create the shroud including dead eyes before the rat lines. It's a lot easier than doing them in situ.

     

    20230619_220017.thumb.jpg.1da50ba1d25ab65142138a618551d1d1.jpgDSCF2066.thumb.JPG.1abb60db191d7f9b1c2a06abb1c6c7ea.JPGDSCF2067.thumb.JPG.3629bf3e14581e7a413e1565a9bbed72.JPG

×
×
  • Create New...