From: hal@b...
Date: Mon, 9 Dec 1996 18:39:10 -0500
Subject: Volume in FT
Actually, the only reason I was able to "pin" a volume to FT was because they came up with Cargo Space in FT II. Once you are given a specific formula (in this case 1 mass = 50 CS) then it begins to happen - things can be "calculated" and mass errors and volume errors can be made to become "logical". Like Mike says, composites can change the amount of volume that can be involved for the same "mass". Also, like someone mentioned, I was trying to use "mass" to equate to "volume", and that just doesn't cleanly work. Points to be considered in the debate regarding the WW II ships... 1) more "weight" and thus volume, needs to be below the water line, or the ship winds up going "turtle". If there is too much of a weight imbalance potential, ships would go turtle during storms a lot more often than they do (or so I have been told). Thus, at least 1/2 of the ship's volume has to be centered near the waterline or else... 2) Whereas you can't say 100 tons of steel will hold exactly 2500 cubic feet of volume, you can say that generally speaking, each cubic foot will weigh on average X lbs. based on "current" engineering practices. I came across a webpage that describes a space plane (ie single stage surface to LEO interface like the space shuttle). It states that X lbs of thust have to be generated, and that each amount of volume will probably, if aeronautical engineering practices as currently practiced are followed, then the plane will weight XY weight... So, while I can't give precise values for the actual WW II ship conversions, I should be able to get a close enough value. By the by, displacement tons for a ship is for the total ship, not the part that rests in the water. If the Hull weighs X lbs, and you put it in the water, it will (assuming it floats!) ride a set height from the water line. Add a deck, equipment on the deck, engines, ect... it will ride lower in the water, because the hull weighs more (the weight of the top being pulled by the center of the Earth via Gravity). In some cases, if the hull rides too high out of the water, it's center of gravity is bad and the ship can topple! 3) I am not advocating that the ships have to equal WW II clasifications in size per se. Nor do I feel that a DD should take as long as WW II construction times for FT. What I do feel, however, is that if a DD in FT is 1/3 the size of a Normal DD from WW II, that the time required will be about 1/3 the time of a DD from WW II. As I mentioned before, the ships will be more complex than their WW II counterparts. They need to be sealed from the air, they need more complex electronics emplaced, or even more equipment than did the WW II counterpart. In addition, as even FT acknowledged, most Sci-Fi combat games borrow HEAVILY on World War II, so using the construction from WW II does make sense. Having said all of the above, I fully feel that the campaign rules should be FUN. I remember playing STARFIRE with the campaign rules they first came out with. It was fun and enjoyable, and could be played in a relatively short amount of time. IMPERIAL STARFIRE almost requires that you have a Personal Computer, and/or a college degree to play... Please don't assume that I am pushing for "MY" rules for the campaign rules (which FT promised would come out by the way...). I am just stirring up the dust, waiting to see how it settles...