Center of Gravity (ie: center of mass) is typically the balance point, but not always depending on shape. How can you balance a ring of any size horizontally? LOL.

Here's a good read, that's easy to read, I found:
http://dev.physicslab.org/Document.a...CenterMass.xml

I have been in 311 Formula with TRS, and also Bravo, they ride totally different same speeds and options, so there has to be a difference in COG there, seems the Bravo boats porpoise more, same as Cig Café TRS/bravo..

Like a 62 ton Abrams tank in a C5A ?

Well I gess that explains why my boat lost 10mph after I added a 19in flat screen TV in the cabin......

I must have mounted it to far forward

The trs is deeper in the water!

I've been in all of those, someone you were with couldn't run a boat too well. the only cafes that porpoise uncontrollably were the few that got a notched transom, that was more to do with drive height than style of drive

I was told they are same depth as Trs...

Oh itnwas not out of control at all, just seemed the Trs boats rode more solid...both can run boats fine justbdifferent ride

I'm pretty sure the trs is longer, not sure if the x-dimension was altered to compensate.