[TEC] Help with sub draft

[jdkbph]

Originally Posted by leovampire

It cut's down on Prop noise that can be detected over a long distance by DD's having the sub's prop's lower in the water. Also it makes it easier for the sub to stay on the surface of the ocean and cut through the wave's rather than getting pushed under them.

Hi LV. I think you misunderstood. I understand about cavitation and such. It's not that I think the sub is too low in the water... I think it is too high. In other words, too much freeboard. Interestingly - and this is just a side note - it appears that the relationship between center of buoyancy and center of gravity (aka, metacentric height) may actually be modeled here, as there seems to be an apparent effect from this on lateral stability.

Anyway... my opinion RE freeboard is based on numerous photos of Gato and Balao subs available on-line. If you look (eg, http://www.navsource.org) you'll find that what we have in SH4 with these mods applied is similar to what you might see when a boat is first launched or during trials (ie, considerably less than standard displacement), rather than what she would look like in an operational condition (somewhere between standard and full load displacement).

Near as I can tell, the difference is about 15" forward and 20" aft.... rough estimates of course.

And again, I'm not looking to stir up anything with the question... just trying to figure out how to make it look right to me.

JD