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[Lee.007]

Thanks John! Since my boat is probably much smaller (20feet, 250 lbs boat weight, 867lb displacement) the effect is probably much larger. But, I have...

[Lee.007]

Dolfiman, Wow, I am amazed at how similar that boat is to mine.

I agree with you 100% about testing and working out the bugs before I slap...

[Lee.007]

So I am the OP for the thread PI Stazzer referenced. He asked if I would be offended if he started this thread, and I said absolutely not. In fact, I...

[Lee.007]

So if I understand the numbers correctly, current sail configuration is pretty good, but with the hobie sail rig I should be faster than the wind so...

[Lee.007]

I estimate the boat to be 200 to 250 pounds. 4 of us can carry it easily. I am 196 pounds, son is 170. Add the weight of our fishing gear and safety...

[Lee.007]

Tonight I made a little bit of a discovery. The leeboard on my boat right now only has 3 square feet of surface area...

So, at a sail area...

[Lee.007]

I hit 6mph and then made my turn. The boat was still accelerating, so if I had maintained my course I would have gone faster I'm sure. The weather station...

[Lee.007]

Got out on the water today. The lake water is about 6 feet below normal level. Drives me nuts. Anyway, I put the new rudder on and the boat tacked great....

[Lee.007]

I agree... almost. Yes, the total mass of the boat is set. Can't get away from that. But, I am not adding any wieght to the amas when I gear up and put...

[Lee.007]

Welcome back Dave! The wind is supposed to be good down here tomorrow so I am planning on going out in the afternoon. I have room to put my son on the...

[Lee.007]

PI Stazzer, I am always amazed at pictures like this. Not only does the whole boat look like its on the edge of capsize to me, but look at those guys...

[Lee.007]

I just checked my drawings again. My design water line displacement is 104.4 gallons. That times 8.43pounds / gallon for freshwater is 867.7 pounds....

[Lee.007]

Oh, I found another article that talks about a Bruce Number: https://www.boatdesign.net/threads/s...tihulls.49892/

Still using only...

[Lee.007]

So I have a question about trimaran calculations for performance and such.

For stability factors, do you use the beam of the Vaka? or the...

[Lee.007]

I could pivot the rudder up or down, but that won't give as great an effect for sliding it vertically like you suggest. Might give me some indication,...

[Lee.007]

Hey guys, I just realized the picture in post 171 is showing my boat only with the single mainsail in the forward mast position I built. I have two mast...

[Lee.007]

The centerline distance is 7 feet. So b/5 ~ 1.4 feet. That still puts the mast in my lap. Moving the mast just isn't an option. It is in front of...

[Lee.007]

Quick post to show you guys the difference between my old rudder and the rudder I designed for the new boat. I didn't think there was that much difference...

[Lee.007]

Dolfiman,

I found an article here: https://smalltridesign.com/Trimaran-...-Helm-Pt1.html that supports what you are...

[Lee.007]

I am sure I will. All three times I have had my boat out, with the exception of maybe 30 minutes last Saturday, the wind has been so light it hasn't really...