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John McKenzie · 28 June 2009, 02:02 AM

Possibly due to the perhaps opperational requirement for greater "ruggedness" within the design of this "workhorse"...The rudder bar is additionaly stabalised by rollers , either side of the central pivot . These are carried in forked bolts , passing through the rudder bar...being prevented from turning by their fitting into a square holed washer screwed on the underside ....The rollers ride on (black painted) sheet melal supports , the top of which is machined true (on the lathe ) so nothing binds..........The central cone is constructed in 3 pieces of Dural'...The main cone part is machined from solid billet (it was originaly a spinning )....Then there is the base plate of 12swg material , with the central pillar between . These are riveted together , being located together by spiggots either end of the pillar , which carries through it , the High Tensile Steel (S96) spindle on which the rudder bar swings...A phospher-bronze flanged bush is interposed...This may be noted on a general view of parts posted previously......4..1/4" BSF bolts (to AGS spec A25 if I remember correctly ) hold the cone while 3/16 (2BA)..4 each secure the (black) sheet steel supports to the floor boards with washer plates underneath......The sheet steel supports are each in 3 parts..Inner & outer..Welder together, with an additional plate fitted on top.(this is the part which is "skimmed" on the lathe set-up to true flat the assembly as the "Roller-way" ).....Quite a complicated piece of equipement to perform ,what seems on the surface , to be a simple task !

28 June 2009, 02:02 AM	#122 (permalink)
John McKenzie Forum Ace Join Date: Oct 2008 Location: Southampton U.K. Posts: 1,789	Rudder bar assembly. Possibly due to the perhaps opperational requirement for greater "ruggedness" within the design of this "workhorse"...The rudder bar is additionaly stabalised by rollers , either side of the central pivot . These are carried in forked bolts , passing through the rudder bar...being prevented from turning by their fitting into a square holed washer screwed on the underside ....The rollers ride on (black painted) sheet melal supports , the top of which is machined true (on the lathe ) so nothing binds..........The central cone is constructed in 3 pieces of Dural'...The main cone part is machined from solid billet (it was originaly a spinning )....Then there is the base plate of 12swg material , with the central pillar between . These are riveted together , being located together by spiggots either end of the pillar , which carries through it , the High Tensile Steel (S96) spindle on which the rudder bar swings...A phospher-bronze flanged bush is interposed...This may be noted on a general view of parts posted previously......4..1/4" BSF bolts (to AGS spec A25 if I remember correctly ) hold the cone while 3/16 (2BA)..4 each secure the (black) sheet steel supports to the floor boards with washer plates underneath......The sheet steel supports are each in 3 parts..Inner & outer..Welder together, with an additional plate fitted on top.(this is the part which is "skimmed" on the lathe set-up to true flat the assembly as the "Roller-way" ).....Quite a complicated piece of equipement to perform ,what seems on the surface , to be a simple task !