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> If that is the case, and I think it is, then an "easier but more > efficient" fin is an impossibility. > > A more slippery car, or diver, is a possibility, has nothing to do > with force/energy/action/reaction. > Lets take your car as an example: By your logic every car should produce the same miles per gallon. Do they? Not the last time I looked! > > The ENERGY requirement remains the same for a given distance, never > mind the fin (all else being equal). Other things can, and will, vary. > The same energy (gas) takes different cars different distances. > The energy you expend will, never mind the fin, achieve the same > distance (all else being equal). No it won't. Suppose you run a hundred meter race. You claim that the fin doesn't matter. Then the shoe you use in the race shouldn't matter. See what I mean? So I think we have proved that a fin can make you use less energy to go the same distance since it moves the water more efficiently. Streamlining their gear should on the other hand help the avarage reefdiver more than a couple of twinjets would IMHO And they are not good for wreckdiving since you can't do a proper frogkick. /Jonas -- Jonas Bergenudd +46 733 909 909 -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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