Sea Sled madness. It’s in my brain.

I guess in that climate, it can't be called "sweated" labour !

 

Nope. A few degrees above freezing. And damp as can be. Ive been warmer at 20 below freezing.

 

Also not bad to be doing chinups at 55, at that weight.

 

Wow, quite the progress. It's been awhile since I've been on. Nice job DC.

 

Some inspiration. 1922, 57 mph.

 

Can anyone make an educated guess what the trim angle is on this boat? It looks lower than Savitsky's 4° to me.

 

If that line that cuts through the "9" is the reference, it is easily 4 degrees. But that may not be parallel to the underbody lines

 

I think it's the line below that, that the 9 rests on.

 

How did you work that out, without a drawing of it ? Certainly that appears less than 4 degrees

 

Same builder, a few years later. It seems to be the same esthetic. But I'm only guessing. I don't think there are any other pictures of Orlo III.

 

oops. Except this picture of OrloIII. Well, now I feel dumb.

 

It does look from that, that the line under the "9" is your reference. That is seemingly parallel to the outboard part of the bottom, but it is a warped plane boat, and they will trim flatter because the middle part of the boat in this instance, still has a couple of degrees extra angle of attack, and not forgetting it is working in water being pushed toward the centre, amplifying the lift.

 

You can't take much notice of a photo, unless it is flat water, in assessing trim angle. Why are you worried about the trim angle, I would expect it to be pretty low, all things considered.

 

I'm trying to get some sense of center of hydrodynamic lift. I can calculate static displacement lift easily enough. Dynamic is harder. I need to finalize fuel tank location soon.

 

I don't think you need to be too pedantic about that, unless you have a lot of fuel in a short length of tank, which is pretty well impossible anyway, if the sole is set low. Set it toward the centre of the boat, a long tank will be less critical.