The main shaft of the controle column is a Nickel bronze alloy known as "Delta" metal...(Very strong and does not effect compas )...In order to make it more complicated
(or to save weight ?
* )...The shaft is parallel at the bottom 1/3 , then it tapers down in diameter over the next 1/3 , and then is parralel again...So you start off with about 10swg tube ...into the lathe ...and its about 16swg at the top.(dimensions from memory)......At the bottom is a fork piece . This I made on the lathe with the fork cut by "hand" method...It is from a billot of High Tensile steel (S96)..and this gets soft soldered and Taper Pinned to the bottom of the tube.........Just above this is the H.T. (S96) steel bracket / lug for the attachment of aileron cables.....Note that there are two posible positions available to vary the sensativety of this control . ...Again , this part had the basic internal dimensions machined on the lathe , and then the outside shape finished off by hand .........A little way below the top handle is the (revised position ) Bowden lever for throttle control....(Not duplicated/in tandem however..like German machines )....Description of this comes later on....It is mounted via a small Dural clamp bracket to the tube shaft...........Above this is the "Handle"...........Cont,.
