Vesuvius Hull – Part 3

Once the ballasting had been worked out approximately, it was time to move ahead with rudder installation and then the deck and superstructure.

The rudder was a bit challenging, as the hull is very narrow at the rudder post making installation of the usual rudder arm impractical.

One solution would have been to install a wheel or gear on the rudder shaft and link it by belt or gear train to the servo.

The approach I decided to use was derived from the old whipstaff/tiller arrangement used prior to the development of ship steering gear and wheels.   I first drilled and tapped a 3/16″ set screw collar and then threaded a 1/8″ rod to fit.

This shows the collar with set screw and the separate location for the threaded rod, with locknut.  The forward end of the rod has a wire loop soldered on, and it accepts an intermediate link made of 12 gauge brass wire.  This link passes through a collar which allows it to pivot as it swings back and forth to move the tiller.

In this view, you can see the plywood support for the pivot.  The wood is glued to a deck beam and the pivot glued to the wood.

This is a shot through the hull to show the pivot collar for the rudder linkage.   With this arrangement it was possible to set the pivot point wherever needed to get the greatest amount of tiller swing within the limits of the hull width, and the servo arm rotation.  I will install a heavy duty standard size servo with the rotating arm or disk beneath the forward end of the link.

Once the running gear was installed, it was time to begin the decks.