When I scaled up the mock up of the steering arrangement from 1:2 to full scale 1:1 I realised I was on the wrong track. There where to much interference of the different functions.
One of the desirable properties of my version of the dubble rudder configuration is that I hope to be able to use it as a brake running before strong winds I therefore like to use large rudder angels.
There is also a swimming ladder and arrangement for a foil to be driven by wavepower. This has also to be taken into consideration.
Below is my latest solution. A tiller with lines did not give large enough rudder angels. A quadrant would give large enough angles but would require the steering lines to be in tension at all times otherwise they would jump out of their tracks.
My arrangement looks a bit like a quadrant but is not. It has blocks fastened on each side of rudderplane enabling me to get large angels. Also that takes upp the big forces as close as possible to their origens enabling me to have thinner lines.
Below are some pictures. They should be self explaining. Only one side is done on the mock up as the two sides now do not interfere with each other.
In the middle will be the bathing ladder. To make it wide enough I will widen the platform by 11 cm each side to get a total ladder width of 44 cm.
Click once or twice on the pictures to enlarge.
To be continued…