9 years in submarines :) Oh, and I'm an enginnering nerd who killed time on one deployment by reading thru Burcher and Rydill's 'Concepts in Submarine Design' twice. Used it again more recently as I've been building some very small scale RC ship models that are VERY sensitive to how one ballasts them. (1,250 ton destroyer and an I-400 submarine in 1/144 scale, both combat models with gun and pump. DD is almost done and I gotta say it is a really good packaging job)
But my thinking on such things for amphibious tanks (or supply vehicles) is that a positive metacentric height is highly desirable because while they have a reasonably strong righting moment (because they are pretty wide for their depth), they are fairly dense structures and once they get rolling, the inertia (combined with a negative metacentric height) could easily flip a very costly (not to say dear to the owner) tank. This may or may not be a big deal depending on depth of water and water-resistance of the component parts, but if one was going to design an amphibious vehicle in the first place, why not do it right? ;) On reflection, I'd also work out a scheme for securing cargo in a support vehicle. A battery sliding during a water transit would be bad :) On Fri, May 21, 2010 at 11:00 PM, Mark_123522 <[email protected]> wrote: > Clark: > > A surface ship might have a positive or negitive metacentric height, > but A submarine MUST have a positive metacentric height. > > Metracentric height is really arcane stuff! How do you know of such > things? > I read a book or two on navel architecure many years ago. > > Mark > > On May 19, 2:49 pm, Clark Ward Jr <[email protected]> wrote: >> I agree with sneaking in bouyancy where ever we can. I was going to >> do a dissertation on metacentric height, ad nauseum, but then it >> occurred to me that if a 1/6 scale tank suffers a casualty that allows >> water in, it's going down regardless of design features lol. Not >> enough reserve bouyancy by half, even with super-lightweight >> batteries. Still would love to see a PT-76 running around and >> swimmable. Or an LAV. >> >> -- >> Clark in Georgia >> >> -- >> You are currently subscribed to the "R/C Tank Combat" group. >> To post a message, send email to [email protected] >> To unsubscribe, send email to [email protected] >> Visit the group athttp://groups.google.com/group/rctankcombat > > -- > You are currently subscribed to the "R/C Tank Combat" group. > To post a message, send email to [email protected] > To unsubscribe, send email to [email protected] > Visit the group at http://groups.google.com/group/rctankcombat -- Clark in Georgia -- You are currently subscribed to the "R/C Tank Combat" group. To post a message, send email to [email protected] To unsubscribe, send email to [email protected] Visit the group at http://groups.google.com/group/rctankcombat
