I am a little confused about the use of parrels. Here is an image I found on a FSM forum I think. It is how I understand parrels to be arranged.
Clearly if raising or lowering the yard the trucks enable it to "roll" down the mast. Mostly. But there is still wood-on-wood in the red area. So there is still direct friction and wear. No?
And if we are rotating the yard in the horizontal plane (using braces, see blue arrows below) then there is still friction in the red area but also the trucks are being pulled sideways, whereas they roll up and down, not sideways. Surely that is not good...
Have I misunderstood something?
Thanks!
Clearly if raising or lowering the yard the trucks enable it to "roll" down the mast. Mostly. But there is still wood-on-wood in the red area. So there is still direct friction and wear. No?
And if we are rotating the yard in the horizontal plane (using braces, see blue arrows below) then there is still friction in the red area but also the trucks are being pulled sideways, whereas they roll up and down, not sideways. Surely that is not good...
Have I misunderstood something?
Thanks!