How much beam for "semi-self-tending" setup?

[Brion Toss]

Hello,
That house doesn't leave much span for the concept, it's true. But much depends on boom height relative to the housetop; the lower it is, the more preventer and vang effect you'll have for a given boom angle. Have you tried mocking it up?
Fair leads,
Brion Toss

[drawson]

That's the next step . . the boom is VERY low - we can't open the vberth hatch more than about three inches with the boom tied on the center-line and there's certainly no way to store a dinghy under it.

Thanks . . . I'll take a pic of the mockup

[atle]

Hi, I'm also considering this semi-self-tending setup. I have a related question regarding vang/preventer efficiency: It seems to me that to achieve this, the outboard blocks (which in my case can be on deck) must be a as much forward as possible. On the other hand, this will probably put a very high load on the other "sheet" block, as the angle between the "sheet" and the boom will be very small.

Any comments to this? What would be the ideal position for the blocks?

Cheers,
-atle