Commander 147

[carbonsoup]

One particular modification that you have made, internal halyard masthead blocks, is one i am definitely interested. Once I get some headspace for this modification I will be in touch, most probably in April/may when I attack the mast and spars. One question that I did have; it would seem likely that the halyard could get caught over the top or to the side of the block, during squally weather which would most surely cut the halyard in quick order. Had you considered a SS 'chock' welded on and bridging the entryway for the halyard? I admit this could add leverage of a twisted halyard to bend the entire assembly causing more serious problems...

[Commander 147]

One particular modification that you have made, internal halyard masthead blocks, is one i am definitely interested. Once I get some headspace for this modification I will be in touch, most probably in April/may when I attack the mast and spars. One question that I did have; it would seem likely that the halyard could get caught over the top or to the side of the block, during squally weather which would most surely cut the halyard in quick order. Had you considered a SS 'chock' welded on and bridging the entryway for the halyard? I admit this could add leverage of a twisted halyard to bend the entire assembly causing more serious problems...

I don't think it is possible for the halyard to get hung up on the edge of the sheeve (where there is only approx. 1/16" of clearance on each side) or on the top because it is rounded and sloping down so I can't really see a need to do what you are suggesting (if I understand correctly). Of course only time will tell for sure when she is getting used.

[Commander227]

I have installed two of the halyard block set ups from Jerry's drawing on different boats. It is a great mod... Have not had any issues. One change I would consider how ever is to make the jib halyard block lower than the main. The reason is twofold; one is to increase clearance between the block and the furler's luff tube and if it is a couple inches lower it will eliminate the need for a halyard wrap preventer. Like I said it works well as is, but if I were to have another made I would lower the jib block.
Mike
C227