| I was very surprised when the steering
cable broke as described in the log.
The wear on the cable was obvious. It was confined to the area where the
cable was in contact with the blocks. There was no sign of chafing or wear
on the block housing. The sheathing was worn off at this point. It is my
guess that the tension and almost constant movement on the cable at this
point was more than the cable was designed for. I am still amazed that
the cable broke. The cable was very good for not having to adjust it over
time.
Since I have no good explanation for why
this happened I decided to use a low-stretch line and make some other modifications
more like the original design called for. The shaft attachment was moved
forward (it should be closer to where the steering clutch hits). This allows
the blocks to run horizontal rather than vertical as I had them. I still
have a turnbuckle for adjustment. This requires a knot at both each end
of the line.
The steering seems to work quite well with
this arrangement, however there seems to be quite a bit of play develop
after use. I believe the buntline hitches used are not holding as well
as I would like (they are supposed to slip).
I have replaced the knots with rope clamps.
These small metal clamps with 2 screws hold 2 ropes and make a very nice
attachment for a rope eye. They hold very tight and are easy to set up. |