Interesting Inconsistency - Nautilus

[carcharadon]

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[michael]

I don't remember for sure,

I don't remember for sure, but I don't think Verne mentions rivets. He does say the hull plates overlap. The Hunley submarine and several of the Winans experimental iron-hulled vessels built about the same time that Verne was writing used countersunk rivet heads to reduce drag. These vessels also had hull plates butted together and riveted to internal rings to keep the hull smooth.

[wbnemo1]

Hi,
just a quick note]http://www.subcommittee.com/forum/icon_smile.gif 11

[color=#000000]Hi,
just a quick note]http://www.subcommittee.com/forum/icon_smile.gif[/img] 11 footer reference of course]

[tk-7642]

Very Interesting. I think that

Very Interesting. I think that when the salon housings are made lto stick out into the water stream farther than the correct amount (like a paddle-wheeler almost on some!) they may cause turbulence for the prop, stabilizer and rudder causing yaw instability (as carachodon mentioned). I think this could cause the stabilizer (tail fin) and rudder to lose some effectiveness. Without this excessive (and innaccurate)drag it's more stable.
The center of gravity of the nautilus appears to be near the salon or slightly in front. The center of gravity is the "calmest" part of a boat or vehicle and this is where Goff (or Verne) chose to put the salon/museum with its delicate specimens and artwork (the bow or stern pivot around it alot like the back of a bus does). This may be important in the design (as was mentioned above by carachodon) since the salon housing's drag may act like the fins on a dart or a parachute even. If the C.G. in a dart is well ahead of the fins it's stable - but if the opposite is true it's unstable. With the correct C.G. the dorsal fin will then have a stabilizing effect when underwater also as it is behind the salon housings and thus the C.G. I am going to minimize this problem on mine by making my salon housings protrude slightly less than the 11 footer while making the observation windows slightly less convex as mentioned by Wbnemo. I also intend to round off my salon housing' s very sharp edges and make them more rounded like on the (blueprints and 11ft) to create less turbulence for the tail. These changes should make the rudder and tail fin more effective as the original designer intended.

[carcharadon]

Links do not work

Links do not work

[bob the builder]

Hydrodynamics aside, the Goff Nautilus

Hydrodynamics aside, the Goff Nautilus is one cool submarine.

To put it in perspective, why would an RC model airplane builder choose a subject such as a WWI biplane, or the Wright brothers first aircraft when they could choose a modern Cessna or Beaver and get far superior performance characteristics? The answer, of course, is that it is the subject itself that gives them pleasure, and not how it performs in actuality.

Of course, a really fast Nautilus is what I REALLY want....