|Luis steering off A Guarda|
We decided that the only solution was to change to wheel steering, with 2 wheels either side mounted on the bulkhead.
My design was like this. Large (0.75m dia) wheels are mounted in front of the cockpit seats either side. They spin on mounts bolted directly to the aft cabin windows. Concentric with each wheel is an inner pulley to drive the steering cable. The cable makes a 400º turn round one steering wheel pulley, rises over an idler pulley above the cabin door, to another the other side of the door, to the other steering wheel pulley, makes a 400º turn, goes down through holes in the cockpit seat and cockpit floor to an idler pulley, runs aft along the hull to an idler pulley just aft of the rear cross-beam, up to an idler pulley on the cross-beam, and thence to a car on a rack mounted centrally on the cross-beam. Tie rods run from the car to stub tillers on each rudder.
The steering wheels and all pulleys are mounted on ball bearings.
I couldn't find any wheels for sale anything like what I wanted, and those I could find around this size were very, very expensive. So, I decided to make my own! Given that this required buying a lathe and making suitable tube bending equipment, this approach certainly didn't save any money. But it gave me a lot of fun!
|Wheel hub drawing|
|A finished wheel|
|Steering car on its track|