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Old 03-19-2023, 09:01 AM   #11
City: Rochester, NY
Vessel Name: Hour Glass
Vessel Model: Chris Craft 381 Catalina
Join Date: Aug 2019
Posts: 6,688
Originally Posted by backinblue View Post
Or if you could make it worse! It's a fair question and I get it, but if it's handling fine and you are not trying to correct an observed issue, there may be a better use of your time. You're welcome to work on my boat any time!

Exactly what I'm afraid of and trying to find out. From my searching around online, I haven't found a single mention of a boat with reverse Ackerman on the rudders. So it's definitely uncommon at the least. My hope is that someone else has seen it somewhere and might have a "it might be done for this reason".

Realistically, there's only 1 steering quirk I can think of that might be related. At higher displacement speeds (6 - 8 kts) going hard over on the rudders produces a good, tight turn, but one heck of a nasty shudder in the boat. I've always assumed it's prop cavitation and disturbed water flow from the stern moving sideways too quickly, but I wonder if it could actually be a water flow issue around the rudders. This only shows up at certain speeds, it's no problem at idle, and once you're a bit above hull speed you don't get as much of a stern sliding sideways effect in a turn, so it's all good and smooth.
rslifkin is offline   Reply With Quote