AnobiumPunctatum

fixed all guns









 

some progress:

I finished the chain pumps:










 

little step:








 

Today I made some progress on the transom and frames, including the jig. I’ve been staring at this on my computer
for months in anxiety wondering if this will even make sense let alone work. It did. Some minor adjustments need to be made but I’m very happy with the results. 

the jig is fit to the hull dry and it’s pretty snug in order To keep things lined up properly. There are two pieces of the jig that align all the frames as well as the vertical components of the jig, none of these parts should be glued to the frames otherwise you’re in trouble. There are a series of transverse structure pieces that tie the frames Together and help with QG assembly.

you can also see the gun port framing, this is all laser cut and etched for the gun port sills, they should just slide into place.

The base for the upper balcony was also installed to test fitment and it worked, it’s made up of two pieces one lower and one upper, together they also create the deck camber at the balcony and are a landing for the balcony planking. The notches in the frames help hold their shape and then just clamp the upper on after the lower is dry.



I also ran a test on the longitudinal piece for the gun ports on the lower deck, this also ties all the bulkheads together. On the bottom you will see the etchings for the gunport sills, tomorrow I will cut out the remaining 8 and possibly add
all the sills.

after all the gunport structure is in place and the bulkheads are stabilized, then I can remove the framing jig, the transverse parts of the jig will have to be cut loose in order to lift it out but this shouldn’t be a problem. Another jig will Be made in the center to contain the bulkheads when fairing, I will hopefully build this tomorrow. 
Thanks for looking in! Questions and comments are always welcome.
JJ

Thanks to fellow member Ron Thibault's work in preparing   3D drawings of the Armstrong Frederick pattern, a realistic barrel was easy to have made.   Details of the George III cypher and the flash pan as well as astragal rings can be seen below.
Allan
 

 

 

I’m working on assembling the first prototype, this one will be used primarily to test fit parts and it will only be built to accommodate the basic structure. Most all parts are MDF  as it’s better place holder than more expensive woods. I’m hoping to get the bulkheads on tomorrow as well as the longitudinal structure, from there I will produce the longitudinal strakes for the gunport framing. More to follow soon.
 

Cap squares are done, in place, and functional.   Making a retainer wedge will be easy but finding small enough chain even at 1:24 scale is tough.  For smaller scales, something other than chain would be needed and I wonder if any of the members have tried to include them or just leave them off altogether as I have done when working on smaller scales.
Allan

Square frames (pt. 2)
Hi guys,
 
Moving ahead I decided to cut out the remaining square frames from sheet and mill all 140 scarph joints. A real exercise in patience, like doing guns.

Mike

Below is the barrel superimposed on the carriage and it does look to be too much angle.   The barrel taper is indeed 2 degrees and the brackets
are 4 1/2 degrees.   Thanks for all your observations!!
Allan

Just as a check for the angles, I made a superposition of the top view in the pdf document over a contemporary drawing of 1775 (see post #8 in the 'Gun Carriage questions' thread).
 

 
The image from the pdf (red colour) was scaled, respecting the ratio, to align both wheel axles. The comparison of the angles seem to give evidence for druxey’s observation.
 
best regards,
   Kris

I drew up a comparison of the barrel to the carriage, and the drawing is correct.
 
First the drawing with a rough line parallel to the barrel, and center lines on the top view of the carriage.
 

 
Then I transposed the barrel lines onto the top view.
 

 
 
So while the carriage looks overly angular, it is an optical illusion. the angle is correct.
 
 

Lately I have taken a lot of interest in cannon from the Pitt pattern and Brown pattern era up to and including the Blomefield pattern era.  For a change of pace I decided to do a little project building an Armstrong Frederick 24 pounder circa 1760-1790.   First up was to make drawings of the cannon and the carriage.  The carriage drawing was printed on label paper and a copy on regular bond as well.  The PDF is much clearer than the jpg below so I have attached it as well.   Carriage and cannon Parts ID.PDF
 

The brackets (or cheeks) were first up.   Castello is used for the carriage, but any tight grained species would work.   A slat of appropriate thickness was cut and thickness sanded, then cut in two to make a sandwich.  A few dots of PVA just outside the periphery of the brackets was used to hold the two pieces together.  The bracket drawing on the label paper was then cut and adhered to the wooden sandwich.    

The brackets were cut out but not the mortises for the axles nor the half holes for the trunnions as the brackets will not be sitting parallel to each other.
 

Allan