Masthead multipliers

[Endemann]

I have finally gotten on the site to ask a question. Sorry to tell you that my computer skills put me in limbo when I have to sign in, make up a password, etc. Very hard for a guy who is in the computer generation gap. Can you guess my age?

QUESTION: When you put tension on a halyard, especially with a bendy mast; is there a mechanical advantage of 2:1 that compresses the mast? I ask this as a comparison to a halyard lock, where the tension might be more than the weight of the sail but not doubled due to the fact that the masthead sheave MIGHT be moving downward as a result of the "purchase" created by a masthead block. Can someone answer this for me, I would love to hear from you. Thanks, Fendemann@gmail.com