AnobiumPunctatum

Here is the modified drawing.
 

That Cheerful draught is unusual: if it was drawn that way, it must have been done like that. However, I'd say that was most unusual. The strength of the joints would be compromised and more bolts would need removing to replace the forefoot or gripe piece. The attached image is rather small, but demonstrates my point. (If you click on it, it will enlarge.) Note the keel joint at around station 6, aft.

My holidays are over so the progress is much slower than before.
 
I did the keelson before building the frames. So it is in my opinion much easier to adjust it with the fore and after deadwood.

 
Before glueing the keelson on the backbone It take a long time. All frames have to be installed first.
 
Today I worked on my first frame. It took quite long to find my way to build the frame. The result is not perfect, but I think doing the next frames will be much easier and faster. If it's interesting for someone I will do a step by step description from building one of the next frames.

My new keel drawing is finished.

 
Next I will draw the frames and build the new bigger version of my keel

Daniel asked me to show how I get the different center points and radii for the construction of an frame. Please be in mind that there are a lot of  other steps necessary before you can start with the frame construction.

First let me refer to two articles which I think that they are very helpful in understanding the lines of an original drawing
1. David Antscherl: Understanding Eighteenth-Century Admirality Drafts, Nautical Research Journal Vol. 52, No. 2 Summer 2008
2. David White: Understandig Ships' Draughts, Model Shipwright No. 48 ff.
 
I made some screen shots during the construction of the main frame of the cutter.

After creating the "Breath Extreme" line in the Body-Plan, I define the Center Points for the Lower Height of Breath.


Next I determine the radii of the arcs, which don't have the center points in the original drawing (most of this arcs were drawn with French Curves).
The list gives the different values:
Lower height of breath: 72.53 first:          260.35 second:    straight third:         -319.9  

 
Next I calculate the center point of the first curve: I draw an arc with the radius 260.35 from the endpoint of my help line and a radius from the center point of the lower height of breath withe the radius 260.35 - 72.53 = 187.82. Then I draw a line from this center point to the center point of the Lower height of breath and stretchit to the circle of the Lower height of breath. Now you can draw a circle with the first radius.

 
Now I repeat these steps for creating the center point of the third curve. I draw to circles with the determined radius, one from the keel and one from en point of the help line.

 
Next I draw a straight line to both circles. There exist an Autocad function to do this, so nothing to construct for me .

 
At last I draw the frame. I start at the Lower height of breath. Then I draw the upper height of breath and complete the frame with the other arcs and straights.


I hope that this small description is helpful for someone.

As written in my last post I bought last month the design drawing for Alert/Rattlesnake at the NMM.
With my new knowledge about reconstruction of a line drawing I started to redesign the ship on basis of the NMM drawing.
 
For this I did not use any information of Goodwin, because it's not a primary source. I don't have access to the archieves so I will only use the NMM drawing and later the vademecum for the scantlings. I am not sure if I like to show my model as designed and shown on the drawing or as shown on the Marshal painting.
Both presentations have the same origin: they should show the design for a ship to the people who allocate the funds.
 
The drawing isn't finished but I like to hear your meaning about the the reconstructed lines:

 

 
It#s my first reconstructed ship, so I am not sure if everything is right.

My new keel drawing is finished.

 
Next I will draw the frames and build the new bigger version of my keel

Daniel asked me to show how I get the different center points and radii for the construction of an frame. Please be in mind that there are a lot of  other steps necessary before you can start with the frame construction.

First let me refer to two articles which I think that they are very helpful in understanding the lines of an original drawing
1. David Antscherl: Understanding Eighteenth-Century Admirality Drafts, Nautical Research Journal Vol. 52, No. 2 Summer 2008
2. David White: Understandig Ships' Draughts, Model Shipwright No. 48 ff.
 
I made some screen shots during the construction of the main frame of the cutter.

After creating the "Breath Extreme" line in the Body-Plan, I define the Center Points for the Lower Height of Breath.


Next I determine the radii of the arcs, which don't have the center points in the original drawing (most of this arcs were drawn with French Curves).
The list gives the different values:
Lower height of breath: 72.53 first:          260.35 second:    straight third:         -319.9  

 
Next I calculate the center point of the first curve: I draw an arc with the radius 260.35 from the endpoint of my help line and a radius from the center point of the lower height of breath withe the radius 260.35 - 72.53 = 187.82. Then I draw a line from this center point to the center point of the Lower height of breath and stretchit to the circle of the Lower height of breath. Now you can draw a circle with the first radius.

 
Now I repeat these steps for creating the center point of the third curve. I draw to circles with the determined radius, one from the keel and one from en point of the help line.

 
Next I draw a straight line to both circles. There exist an Autocad function to do this, so nothing to construct for me .

 
At last I draw the frame. I start at the Lower height of breath. Then I draw the upper height of breath and complete the frame with the other arcs and straights.


I hope that this small description is helpful for someone.

My new keel drawing is finished.

 
Next I will draw the frames and build the new bigger version of my keel

Daniel asked me to show how I get the different center points and radii for the construction of an frame. Please be in mind that there are a lot of  other steps necessary before you can start with the frame construction.

First let me refer to two articles which I think that they are very helpful in understanding the lines of an original drawing
1. David Antscherl: Understanding Eighteenth-Century Admirality Drafts, Nautical Research Journal Vol. 52, No. 2 Summer 2008
2. David White: Understandig Ships' Draughts, Model Shipwright No. 48 ff.
 
I made some screen shots during the construction of the main frame of the cutter.

After creating the "Breath Extreme" line in the Body-Plan, I define the Center Points for the Lower Height of Breath.


Next I determine the radii of the arcs, which don't have the center points in the original drawing (most of this arcs were drawn with French Curves).
The list gives the different values:
Lower height of breath: 72.53 first:          260.35 second:    straight third:         -319.9  

 
Next I calculate the center point of the first curve: I draw an arc with the radius 260.35 from the endpoint of my help line and a radius from the center point of the lower height of breath withe the radius 260.35 - 72.53 = 187.82. Then I draw a line from this center point to the center point of the Lower height of breath and stretchit to the circle of the Lower height of breath. Now you can draw a circle with the first radius.

 
Now I repeat these steps for creating the center point of the third curve. I draw to circles with the determined radius, one from the keel and one from en point of the help line.

 
Next I draw a straight line to both circles. There exist an Autocad function to do this, so nothing to construct for me .

 
At last I draw the frame. I start at the Lower height of breath. Then I draw the upper height of breath and complete the frame with the other arcs and straights.


I hope that this small description is helpful for someone.

My new keel drawing is finished.

 
Next I will draw the frames and build the new bigger version of my keel

Daniel asked me to show how I get the different center points and radii for the construction of an frame. Please be in mind that there are a lot of  other steps necessary before you can start with the frame construction.

First let me refer to two articles which I think that they are very helpful in understanding the lines of an original drawing
1. David Antscherl: Understanding Eighteenth-Century Admirality Drafts, Nautical Research Journal Vol. 52, No. 2 Summer 2008
2. David White: Understandig Ships' Draughts, Model Shipwright No. 48 ff.
 
I made some screen shots during the construction of the main frame of the cutter.

After creating the "Breath Extreme" line in the Body-Plan, I define the Center Points for the Lower Height of Breath.


Next I determine the radii of the arcs, which don't have the center points in the original drawing (most of this arcs were drawn with French Curves).
The list gives the different values:
Lower height of breath: 72.53 first:          260.35 second:    straight third:         -319.9  

 
Next I calculate the center point of the first curve: I draw an arc with the radius 260.35 from the endpoint of my help line and a radius from the center point of the lower height of breath withe the radius 260.35 - 72.53 = 187.82. Then I draw a line from this center point to the center point of the Lower height of breath and stretchit to the circle of the Lower height of breath. Now you can draw a circle with the first radius.

 
Now I repeat these steps for creating the center point of the third curve. I draw to circles with the determined radius, one from the keel and one from en point of the help line.

 
Next I draw a straight line to both circles. There exist an Autocad function to do this, so nothing to construct for me .

 
At last I draw the frame. I start at the Lower height of breath. Then I draw the upper height of breath and complete the frame with the other arcs and straights.


I hope that this small description is helpful for someone.

My new keel drawing is finished.

 
Next I will draw the frames and build the new bigger version of my keel

Hello everyone,
 
after I had so much positiv response about the pictures of my model in the gallery, I decided to start a blog about this ship. 
 
About the Dragon is to say, it was a third rate ship, designed by Thomas Slade and build at Deptford. Launched 4.3.1760 and sold 1784. 
 
It is not the first ship model I have build, but the first 18th century and framed model. A friend told me about the Bellona and I'm interested to learn more about these ships. My first name is Siegfried and that name is program, Siegfried was the most famos dragon fighter here in Germany, or the only? So I would build the Dragon. I ordered the plans from the NMM and a lot of books from everywhere. Then I started learning. Because the whole ship would be too large in 1:48, I decided to build only the stern part, from the 10th frame backwards. After 3 month I started with the model.
 
That was in the winter of 2011/12. In 2012 a friend of mine was in London and I asked him to take pictures from the models at the NMM. That was a great thing and helped me a lot. In 2013 I visited the NMM and the shipyard at Chatham. Here I saw the Superb, the third ship of the Bellona class. That visit changed a lot, you will see it in the pictures. I changed mostly the color of the hull. 
 
I will post the first pictures in a fast pass, to get update with the actual level of work.
 
And please excuse my english.
 
Regards,
 
Siggi
 
 
 
 

As written in my last post I bought last month the design drawing for Alert/Rattlesnake at the NMM.
With my new knowledge about reconstruction of a line drawing I started to redesign the ship on basis of the NMM drawing.
 
For this I did not use any information of Goodwin, because it's not a primary source. I don't have access to the archieves so I will only use the NMM drawing and later the vademecum for the scantlings. I am not sure if I like to show my model as designed and shown on the drawing or as shown on the Marshal painting.
Both presentations have the same origin: they should show the design for a ship to the people who allocate the funds.
 
The drawing isn't finished but I like to hear your meaning about the the reconstructed lines:

 

 
It#s my first reconstructed ship, so I am not sure if everything is right.

Really wonderful Remco

Really wonderful, Mike

@Antony
Thanks for the info.
 
@Daniel
I've scanned the NMM-drawing and work with the digital copy in Autocad. There I can take the measurements of all lines much easier than by hand. Also it's possible to get the information of the radii of the different curves. Be aware that the original drawing has some distortion which you have to calculate out.
The diagonal and horizontal lines in the half breath except the breath extreme line are the result of the construction work in the body plan. There I use splines. All curves in the body plan are arcs with tagential transition.
 
I will try to describe what I did, but it's not so easy to do in English. So please give me bit of time.

Hello Christian!
 
The plan looks goo to me. You might need another diagonal for the aft frames but it´s up to you if you need it or not. Did you draw the original diagonals or you just drawn them taking the points of each futtock on the sheer plan? And another one or two, Do you have the plans scanned and you use them as a pattern on CAD or you have "paper" and you have to be taking meassures? If you are using spilines to make the body plan, how you get to that weird bodyplan with all those parallel lines to the top of the keel? Did you just copy them from the original plan or are actually the center to make the different frames? I would like to know because I have never understood how the shipwrights could get to that. I mean how the hek you find the centers for these sweep lines!
 
Beatiful draft! I´ll copy your info box.
 
 
Daniel.

Hi ChristIan
Lookin very good.
In your first post " . Next step was the keel. Goodwin shows for the pass between keel and lower apron a solution which I could not find on any original cutter drawings."
This had me looking into why Goodwin drew it like this... A local shipwright informed me that it use is " a part of the bow/keel joint that was phrone to being damaged while in shallow waters. This area is easy replaced.
 
Antony.

Really wonderful progress, Jürgen.

As written in my last post I bought last month the design drawing for Alert/Rattlesnake at the NMM.
With my new knowledge about reconstruction of a line drawing I started to redesign the ship on basis of the NMM drawing.
 
For this I did not use any information of Goodwin, because it's not a primary source. I don't have access to the archieves so I will only use the NMM drawing and later the vademecum for the scantlings. I am not sure if I like to show my model as designed and shown on the drawing or as shown on the Marshal painting.
Both presentations have the same origin: they should show the design for a ship to the people who allocate the funds.
 
The drawing isn't finished but I like to hear your meaning about the the reconstructed lines:

 

 
It#s my first reconstructed ship, so I am not sure if everything is right.

Happy Birthday Christian!! Fifty! Fifty!
 
Have an excellent day!
 
Daniel.

Hello Christian,
 
I fear to that I can't be a great help for you. But it's nice to see that your project is going on.

As written in my last post I bought last month the design drawing for Alert/Rattlesnake at the NMM.
With my new knowledge about reconstruction of a line drawing I started to redesign the ship on basis of the NMM drawing.
 
For this I did not use any information of Goodwin, because it's not a primary source. I don't have access to the archieves so I will only use the NMM drawing and later the vademecum for the scantlings. I am not sure if I like to show my model as designed and shown on the drawing or as shown on the Marshal painting.
Both presentations have the same origin: they should show the design for a ship to the people who allocate the funds.
 
The drawing isn't finished but I like to hear your meaning about the the reconstructed lines:

 

 
It#s my first reconstructed ship, so I am not sure if everything is right.