# Search Results

1. Post

### Why are my rudders so ineffective ? (pwc converted to propeller)

Just to help get some terminology straight--because your new eBay rudder is an airfoil of sorts, it will have 'lift'--generated by differential...
Post by: drshaddock, Feb 22, 2008 in forum: Boat Design
2. Post

### The roll acceleration: What´s the best for crossing oceans?

Your calculations are interesting work. I notice that the Catalina 27 row has an inconsistent formula--if you copy the formula from the row above...
Post by: drshaddock, Feb 22, 2008 in forum: Stability
3. Post

### The roll acceleration: What´s the best for crossing oceans?

Teddy, it's hard to imagine any boat being comfortable when waves are breaking over the bow or stern. I'm only trying to say that if a boat has a...
Post by: drshaddock, Feb 22, 2008 in forum: Stability
4. Post

### Why are my rudders so ineffective ? (pwc converted to propeller)

rudder improvement I have a consideration for you--if you're using the water inlet and out for engine or exhaust cooling, and you're using a...
Post by: drshaddock, Feb 20, 2008 in forum: Boat Design
5. Post

Thanks to both of you guys--saved me days of work! What about finding the intersections of layers? It seems to me that if you inserting a...
Post by: drshaddock, Feb 19, 2008 in forum: Software
6. Post

### The roll acceleration: What´s the best for crossing oceans?

I guess it depends on how you work with overhangs in the formula. Let's say you set up a hypothetical bluewater sailboat--say 40 ft LOA, 30 ft...
Post by: drshaddock, Feb 17, 2008 in forum: Stability
7. Post

### The roll acceleration: What´s the best for crossing oceans?

Try this calculator I put together a little Excel spreadsheet to play with the MCR as well as the CSF (and threw in the D/L ratio while I was...
Post by: drshaddock, Feb 17, 2008 in forum: Stability
8. Post

### The roll acceleration: What´s the best for crossing oceans?

Dampening Growing up in the frozen midwestern US, we learned to play a game called Crack the Whip. A whole string of us would hold hands on ice...
Post by: drshaddock, Feb 12, 2008 in forum: Stability
9. Post

### The roll acceleration: What´s the best for crossing oceans?

No--you're completely missing the inertia part of the concept. You [B]have[B] taken a physics class somewhere along the way, have you not?...
Post by: drshaddock, Feb 8, 2008 in forum: Stability