iMustBeCrazy

These days, factory produced mdf sheets come with four very square corners and four very straight sides. Even the smaller sheets.

To make the above shooting board, cut two rectangles from mdf each with 1 square corner and two straight edges (1 long and 1 short) stack and clamp the pieces aligning the long edges with the top piece set down from the top edge of the bottom piece. Fix a fix a stop piece across the top of the bottom piece using the top piece to keep it square. Unclamp. The bottom should now have a stop which is square to it's long edge.

Sounds really confusing but actually very easy once you grasp the idea.

3D Transom (MDF):

Note that when making any part from the drawings you must make sure that the part is drawn 'square on', those that aren't such as the transom, counter, cant frames etc. need to be corrected.

For example the transom viewed from the stern appears to be 49 inches high but as shown is is actually 52 inches. To correct this, the drawing from the stern needs to be stretched vertically by 52/49ths (1.0612244).

Also you need to allow for any bevelling which may not be shown. In this case, the fashion pieces are wider on the forward side and the bevel is shown on the corrected drawing. Yes, I forgot the bevel the first time.

Current state of play:

9 minutes ago, druxey said:

Those counter timbers look a little thick in siding to my eye

Thanks druxey, currently 8 inches, probably only need 4 or 5.

9 minutes ago, druxey said:

Also as per the illustration posted above, usually the counter timbers slope slightly inward.

I guess for even spacing top and bottom. I'll fix them.

7 minutes ago, Bob Portsmouth said:

Hope it helps Craig

Well, it doesn't help my headache but it certainly helps. For one thing it shows I forgot the fashion piece. Doh!

Still need to rework the side counter timbers and perhaps the counter timbers:

7 hours ago, Bob Portsmouth said:

I would say the the timber arrangement was structurally more or less the same for the cutters?

Thanks for those Bob, slowly piecing it together in my head but it's still mostly imagineering.

Still going. Trying to work out the structure of the stern, very little info to work on. Any ideas? Any references?

Re-did the frames to include decks, it will make life easier later. I wonder, what else am I missing.

Work continues, Disposition of the Frame:

9 minutes ago, Tony Hunt said:

They certainly confirm the schooner rig, don't they!

Yes. And that cockroaches can be really hard to get rid of

Some sketches of Bramble taken from Owen Stanley - Voyage of H.M.S. Rattlesnake

12 minutes ago, Jaager said:

You should maybe recheck the location of the sheer point.   I see it as being too close to the preceding station.

It's certainly not final but I should have pointed out that whereas the others are every second station, as usually depicted, that one is station 15, only a single step from the preceding station (14). It's a bit of a guesstimate to try to fill in the huge gap between station 14 and the transom. Same goes for the first station at the bow.

If I could get out and buy some cardboard I would mock it up to get a better feel for the lines.

But, thank you, all criticisms and suggestions gratefully accepted!

G'day Tony,

12 minutes ago, Tony Hunt said:

(as you probably know)

Actually, I didn't. I haven't delved very deeply into all the sisters, half-sisters, cousins and nieces, there's too many.

Cutter then Schooner is the way I see it, the Cutter painting is dated 1840 and the sailplan 1841 so that works.

I guess I will have to investigate Bramble further.

I needed a break from staring at lines on a screen.

Midship frame 1:24 in MDF.

1:24 is massive! 1:48 might be too fiddly for PoF for me, top timbers would be like matchsticks.

Ok, new sheer plan based on the disposition of frames for Speedy (1828):

Lots of work to go, all of these squares need to be filled (this is only stations D, B, 0, 2 and 4):

1 hour ago, druxey said:

The passage may perhaps have been first class, but I doubt that the accommodation was!

Unless you compare it to the crews.

Arrrrggggg!!!!

Three steps backwards, after drawing up the frames at station 2 I remembered ZAZ6425 has two sets of station lines, then I realised that the sheer plan is based on station lines that have no relationship to frames.

While this wouldn't matter for a PoB build I want these drawings to be able to be used for PoF. So I have to re-draw the station lines and sheer plan.

Of course I don't have a table of offsets, but fortunately there is a shortcut I can take:

By drawing a set of rectangles like the one in pink below, where points a and b are on the intersections of a station line and a reference line (in this case a water line) and point c touches the 45° degree line under the sheer plan, point d is the station line / water line intersection on the sheer plan. Unfortunately I don't have many reference lines on this drawing, basically just 4, so I have to base the shape of the 'frame' on those next to it.

1 hour ago, AON said:

they became ships.

First they became a fence, did you notice the latitude of Macquarie Harbour? 42° South, that's roaring forties.

14 minutes ago, AON said:

What a fascinating read!  Thank you for posting this.

You might like this one then, Port Arthur the main penal settlement.

https://nla.gov.au/nla.obj-1961910992/view?sectionId=nla.obj-1965082829&partId=nla.obj-1961946782#page/n26/mode/1up

An account of Macquarie Harbour and Sarah Island:

https://nla.gov.au/nla.obj-1956722306/view?sectionId=nla.obj-1965094843&partId=nla.obj-1961882571#page/n40/mode/1up

Continuation:

https://nla.gov.au/nla.obj-1956083842/view?sectionId=nla.obj-1959466639&partId=nla.obj-1956120316#page/n18/mode/1up

Ship building, Sarah Island 1832. The fence in the background is a windbreak the length of the island.

8 hours ago, AON said:

Are these being built by transported convicts?

Apparently yes, I was aware of shipbuilding at Port Arthur but I assumed small vessels. It seems more likely that the 74 gun was probably built at Sarah Island in Macquarie Harbour on the west coast.

http://www.ourtasmania.com.au/devonport/sarah-isld.html If I have it right, the shipyard was to the right of the bridge.

A nearly completed Brig was stolen from there by 10 convicts and sailed to Chile but the amazing part is that they got it through 'Hells Gate' the entrance to Macquarie Harbour.

https://viewer.slv.vic.gov.au/?entity=IE740422&mode=browse  The entrance is just this side of the lighthouse.

Lower deck done (I think). It was interesting trying to work out the original Lapwing layout from under the revisions for Speedy, luckily ZAZ6347 for the Basilisk seems based on the original Lapwing.

Somehow the squeezed 10 passengers in on the trip to Australia and I have a copy of an advert for 'First Class passage'

Deck done for now. Also tidied up those reference lines.

Sail plan, just for something different.

EDIT: Sailplan updated, now includes spar dimensions an a scale.

Please let me know of any spelling or terminology issues.

Lapwing Sailplan 1in48.mc.pdf

A bit more progress. Deck almost done, just winches to do I think.

I realise now that I should have drawn all those station lines and guide lines on different layers so I could turn them off, live and learn.

3 hours ago, pointfiftytracer said:

Does anyone know of a program or inkscape extension to automatically arrange the parts? 

 

All I know is it's called 'nesting'.

As for the stern, I don't blame you. I'd been looking at these drawings for months and didn't see it, then all of a sudden there it was.