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John McKenzie · 10 July 2009, 06:50 AM

The tank is made of ductile steel ,spec S511 deep drawing.....The ends are spun to hemisperical shape with a step at the edge to accept a reinforcing ring of 14 swg steel about 1/2" wide which is soldered into it . This in turn is tapped to accept the fixing screws that secure the ends to the main cylinder ...On assembly these pre-tinned parts will be sweated to seal the joint........The main body is a rolled up cylinder , of 24swg steel with the joint being a double overlapping lock seam....This joint is also riveted and is positioned on the side adjacent to the motor...Half way along , a circular flanged baffle is secured by riveting , which stiffens the body , and to allow flow of oil , has a number of holes in it .....Either end of the cylinder are raised swages (formed on a "jenny" ) which locate the tank on the leather lined mounting bands., these being supported on 5/8 tube standing stays with threaded sockets that hold the assembly. The outer (longer ) pair attach to the nacelle frame , but the inner , shorter set attach directly atop two of the motor feet mounts , utilizing the 1/2" dia. mounting bolts ....(Unfortuneately , I omitted to photograph these at the time ) .........The filler neck is a thin wall copper tube , flanged at the bottom , where it fits ,offset to one side , to the shape of the curveof the tank , to which it is riveted and soldered.....At the top is the bronze filler and neck , the latter being sweat soldered into the copper stand pipe....A gauze filter is located in the bronze flange , and to assist in filling , a small dia. copper tube breather pipe is incorporated , thus by-passing the filter .....The oil system is "total-loss" and so there is but a single outlet....The conical sump is flanged against the curved tank shape , with , at its truncated apex , a bronze flanged union to AGS pattern riveted on ....The whole assembly is made up as complete individual components , tinned all over and then riveted up and soldered in the correct sequence .....Screwed into the sump/ delivery union is a special AGS pattern On/Off tap ,which I made in Bronze ,....All special part and AGS drawings had to be sourced from my own archive......After all soldering was completed , the tank is flushed , and checked for leaks..............JM.

10 July 2009, 06:50 AM	#190 (permalink)
John McKenzie Forum Ace Join Date: Oct 2008 Location: Southampton U.K. Posts: 1,789	Construction... The tank is made of ductile steel ,spec S511 deep drawing.....The ends are spun to hemisperical shape with a step at the edge to accept a reinforcing ring of 14 swg steel about 1/2" wide which is soldered into it . This in turn is tapped to accept the fixing screws that secure the ends to the main cylinder ...On assembly these pre-tinned parts will be sweated to seal the joint........The main body is a rolled up cylinder , of 24swg steel with the joint being a double overlapping lock seam....This joint is also riveted and is positioned on the side adjacent to the motor...Half way along , a circular flanged baffle is secured by riveting , which stiffens the body , and to allow flow of oil , has a number of holes in it .....Either end of the cylinder are raised swages (formed on a "jenny" ) which locate the tank on the leather lined mounting bands., these being supported on 5/8 tube standing stays with threaded sockets that hold the assembly. The outer (longer ) pair attach to the nacelle frame , but the inner , shorter set attach directly atop two of the motor feet mounts , utilizing the 1/2" dia. mounting bolts ....(Unfortuneately , I omitted to photograph these at the time ) .........The filler neck is a thin wall copper tube , flanged at the bottom , where it fits ,offset to one side , to the shape of the curveof the tank , to which it is riveted and soldered.....At the top is the bronze filler and neck , the latter being sweat soldered into the copper stand pipe....A gauze filter is located in the bronze flange , and to assist in filling , a small dia. copper tube breather pipe is incorporated , thus by-passing the filter .....The oil system is "total-loss" and so there is but a single outlet....The conical sump is flanged against the curved tank shape , with , at its truncated apex , a bronze flanged union to AGS pattern riveted on ....The whole assembly is made up as complete individual components , tinned all over and then riveted up and soldered in the correct sequence .....Screwed into the sump/ delivery union is a special AGS pattern On/Off tap ,which I made in Bronze ,....All special part and AGS drawings had to be sourced from my own archive......After all soldering was completed , the tank is flushed , and checked for leaks..............JM.