KeithAug

Ah! it is a wobbler engine. If you ever want to try something a little more efficient - double acting, self starting and reversible you can always try this on your next model. https://www.machinistblog.com/downloads/paddleduck/04_building_a_model_steam_engine_from_scratch_chapter_4_567_418.pdf

I built one and it works a treat.

Nice work on Miranda. You should do a build log on the boiler and engine build.

You seem to be living on a boat?

On 6/16/2024 at 10:19 PM, Jim Lad said:

I keep looking at the model and seeing all the work I need to do on it! 

John - How many productive years do you have left. You only need just enough!

4 hours ago, NavyShooter said:

I met with a local reporter for a short interview about the build and the launch.

Fame at last. Are you going to post the article?

Remarkably rapid progress Jon. Looking good.

1 hour ago, Keith Black said:

A Maggie update

Keith. It is tough for you both and there are bound to be times when spirits flag. I know what you mean about the thought of a retirement home being daunting. I am approaching old age when mentally I have only just reached adolescence and (probably like yourself) anything that challenges my status quo is particularly unwelcome. I hope your search goes well, but even more I hope something clicks for Maggie and her recovery gets back on track. Best wishes to you both and keep your chin up.

P.S - I understand that retirement home "Grab a Grannie Dance Nights" can be quite exhilarating.

On 6/14/2024 at 12:34 AM, Jim Lad said:

I'm finding myself spending a lot of my museum days just talking to visitors about the ship and the model.

I think that sounds like a wonderful pastime.

36 minutes ago, TBlack said:

How did you manage to cut that slot so beautifully?

 

Tom - Milled it with a 2mm end mill. No skill required!

50 minutes ago, wefalck said:

Sounds like a good solution!

Eberhard - It felt like the simplest option.

35 minutes ago, TBlack said:

something is usually in plain sight!

That happened as well Tom.

More plankers progress. I have to admit I wasn't really on it this week. The workshop proved to be unusually frustrating. It felt like every time I put something down on the workbench I had to search for half an hour to find it again. It wasn't as if the bench was particularly untidy, I just seemed to be in the habit of hiding what I wanted under the thing I had just put down. Anyway for what it is worth here is the progress.

About half the hull is done but that means I have had to sort out the skeg slot in the area of the prop shaft. Because of the fineness of the lines in this area the edge of the slot is very thin and quite ragged as a result.

I decided that planking over this area might prove to be problematic, particularly as the plan is to varnish the lower hull thus precluding the use of filler to mask errors.

Rather than planking I thought it would be better to replace this section of the hull with a solid piece of mahogany shaped as per the pink section of the following plan.

I cut out the template and pasted it to a 3/4" thick piece of mahogany. I then cut the straight edges and drilled a hole to form the small diameter curve adjacent to the prop shaft.

I then rough cut the rest of the curve on the scroll saw, before sanding it to finished size.

I then milled the end to fit around the prop shaft. 

The next step was to gradually hack away the hull while checking the block for fit.

Once the fit looked OK I cut the slot to take the brass skeg.

The insert was then glued in place.

38 minutes ago, Mirabell61 said:

what materials would be suitable for doing so

Nils - I think brass for the runners and wheels would be your best chance of success.

On 6/15/2024 at 9:25 AM, Mirabell61 said:

I am evaluating to make the derrick-mechanism workable

I appaluad your ambition Nils, however I suspect that the lack of weight in the boat and the friction in the mechanism will conspire against you. However nothing ventured noting gained.

1 hour ago, wefalck said:

I gather there various constructional and hydrodyamic factors play together.

Eberhard - Yes I am aware that cargo capacity(volume and weight) v's operating cost has to be optimised more so than ever before. In consequence modern hulls must be hydrodynamically efficient. I would just like them to look more aerodynamically aesthetic as well.

17 hours ago, FriedClams said:

Thanks for sharing the photos of the Sutton Hoo Ship.  Such an elegantly shaped hull!   

Indeed Gary. In fact a lot more elegant than many modern hulls - particularly on container ships which seem to me to have all the elegance of house bricks. Perhaps our ancestors reliance on oars caused them to minimise the water resistance at low speed.

47 minutes ago, wefalck said:

I seem to remember a whole room being dedicated in the NMM in Greenwich to the Sutton Hoo find,

Yes Eberhard I may have seen that but I can't remember whether I am confusing it with the excellent exhibition on the Sutton Hoo site. I have been to both several times and so plenty of opportunity for me to be confused.

14 hours ago, Jim Lad said:

I could just never get my head around excavating a ship that basically wasn't there - just stains in the sand.

John - I think you have to imagine it as an early experiment in lost wax casting (or alternatively a medieval child's beach holiday)😀. it is now a National Trust site but unfortunately no longer a hole. Very good exhibition though.

15 hours ago, Bedford said:

I can definitely appreciate the amount of waste that would occur cutting their strakes that way but it's authentic.

Steve - They are collecting the chips, shavings and offcuts and selling them to tourists in large bags as authenticated kindling - quite expensive actually. Very enterprising.🙂

15 hours ago, Bedford said:

I think groups like that are always welcoming and happy to discuss their work.

Yes, it was heartwarming to talk to them. They were a great bunch, you would have felt very much at home.

15 hours ago, Rick310 said:

as soon as I get a chance, I’ll get more pictures to you.

Rick, don't put yourself out. You have been more than helpful already. I was just wondering if you remembered.

16 hours ago, Mark Pearse said:

I could see a lot of Oak, & some pine perhaps - did you find out much on the timber types being used? 

Mark - they said that the finished ship would be almost entirely oak. The rate limiting step is currently getting the oak. Apparently getting the right quality and shape is a lot more difficult than it was in AD 625. Their target was to finish it within the next 2 years although difficulties with the landlord of the assembly shed may get in the way of this. Their construction  times seem to be shorter than many of ours!

On 4/21/2024 at 11:37 PM, Harvey Golden said:

Well, it's back to the Gjøa again....

       The hull is looking lovely Harvey.

lovely detail on those paddle wheels.

I would love to use a chair but always find myself standing up. Usually because the tool I need is invariably more than an arms reach away. I have never had a chair with wheels though!

Very complex framing and bracing, quite a task.👍

Already showing the benefits of your skills John.

24 minutes ago, wefalck said:

One process that seems to be not so in line with how they did it in the old days is the use of templates.

Yes Eberhard they did explain that. They commented that the original would have been built by eye. No plans and no templates, and of course no two boats the same. They are indeed using templates to assist in accurately reproducing the original.

19 hours ago, Javelin said:

Would indeed be interesting to see the internal layout in that area.

Roel.

The internal plans don't show much. It seems to be located in the area of the chain locker, which in turn is below the crew sleeping cabin. My guess is that it isn't a heads outlet.