Armstrong RML Cannon Model. Making angle iron pieces.
There are quite a few pieces of angle iron in the Armstrong cannon. In the original they measure 95x95mm, and are about 15-16mm thick. Also, there is a definite radius between the 90º faces. At my 1:10 scale, the material becomes 9.5mm x 9.5mm, and about 1.5mm thick.
After considering various options, which included using extruded aluminium, and bending some sheet mild steel, I decided on the following solution….
I bought some offcuts of RHS (rectangular section) with 1.5mm steel thickness, and used a bandsaw and milling machine to produce the required dimensions in steel.
Hi John, All looks pretty impressive. As for the holes around the muzzle face, I am completely baffled as why they there, never seen them in any cannon before!! Please enlighten me. Silver soldering the bandsaw blade is something I have never tried, always have butt fusion welded them, did you need to anneal the joint after soldering?
Keep up the good work.
Hi Chris, I was told that when loading the cannon, a protective plate was held by 2 pins on the muzzle, so it was not damaged by the loading process. Dents around the muzzle apparently can affect accuracy.
As for silver soldering, I do not anneal afterwards. Rarely get any breaks.
Thanks for that, the girders look really good.