A Photo & Discussion Forum for Wharram Design Enthusiasts
Was wondering if there were any updates with regard to steering systems.
I built my rudders (T38) about a year ago, and now as I dry fit all the units I have found the following. Although there is a picture of a aft netting beam in the plans, the rudders are not tall enough, i.e the tillers won't clear the aft beam as you turn (they drop). A frustrating problem, but not the first.
This puts me in a position where I effectively have a lot of choices with regards to my steering system. It would appear everyone has different systems, and I have yet to even see a system as per plans!
Maybe someone can come up with ideas, has anyone progressed in this area?
Ideal Steering System For T38 (in my eyes!)
Open wire system using quadrants mounted on top of rudders similar to Jim Brown cats/tris.
This has the advantage of keeping system in cockpit as per plans, simple. It frees up the aft deck from the tillers. One is able to de tension the system so a wind vane can be used (running off trim tabs), no tiller bar, so system stays as light as possible
The problem are as follows. Initial complexity in design. So far I have contacted 4 well know companies who, when they find out it is a wharram and that I live in SA, the converstion ends.
A Haudraulic system is relatively off the shelf, the end result similar to Natural High, but I cannot see how a wind vane is going to push a 'no feedback' hydraulic system without disconnection the rudders, which is not a great thing to have to do everytime.
I have seen the windvanes in operation and they are great. I just cannot seem to join my rudders and trim tabs to the wheel. And my aft deck design is on hold!
Any imput would be appreciated and the odd pic would be great.
Dan, I've modified the steering system of my Tiki46 mainly to free the after beam area from the too much long tillers.
Initially I thought to use a hydraulic system and after searches I choose to put a traditional steering system using a chain which has with my configuration to use only 2 pulleys.
The system is very direct with no friction : out of water when I turn the wheel, it comes back alone on the neutral position if I free it (on my previous Tiki 30 if I free the tiller, it refused to stay in the neutral position due to the weight of the tillers + beam tillers connection which were too heavy comparing the weight of the rudders according the 30° inclination of it axis).
Here are a few photos, the system seems to work correctly althought only a rope connects the 2 short tillers together. But for the launching I'll replace the rope by a light beam in order to be able to steer the boat if the system is damaged in using an emergency tiller.