Model Questions |
Model Questions |
  Sep 30 2006, 02:16 PM
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 Administrator  Group: Root Admin Posts: 330 Joined: 17-August 06 From: Minot, North Dakota Member No.: 1  |
Here is where GUESTS can ask a question about their model. If you have a quick question you may ask it here without having to REGISTER!
-------------------- Roger
Model Marina Web Master and Discussion Board Administrator "Over the years I have spent nearly all of my money on my Harley-Davidson, my model boats and women. The rest of it I just wasted!"  |
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Oct 1 2006, 12:17 PM
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#2
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Guests |
How do you guys allow the prop shaft to go through the hull without letting inany water? I would think that it would leak some water?
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Oct 2 2006, 10:42 PM
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#3
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Administrator Group: Root Admin Posts: 330 Joined: 17-August 06 From: Minot, North Dakota Member No.: 1 |
QUOTE(Guest @ Oct 1 2006, 01:17 PM)  How do you guys allow the prop shaft to go through the hull without letting inany water? I would think that it would leak some water? In order to allow the prop shaft to go through the hull (like real ships) we use what is called a "stuffing box". Some have also called a "stuffing box" a "stern tube". The stern tube is simply a tube with bearings on each end that support the prop shaft. The stern tube is filled with oil (thicker than water) or grease. The oil/grease prevent water from leaking into the hull. The drawing below shows a stern tube I designed for my USS Crockett to prevent "spider" cracks from the props thrust pushing against the prop strut. The grease fill tube is used to maintain grease in the stern tube.  In real ships, at times water does leak from the stern tubes. This "leak rate" must be kept within specs and is greatly reduced by the crew maintaining proper alignment of the stern tube and prop shafts. In my models I have seen a drop of two seep into my hull at the most. If you keep the shafts in aligned and the stern tubes filled with grease, leakage of water is not going to ever be a problem. Hope this give a quick answer to your question. 
-------------------- Roger
Model Marina Web Master and Discussion Board Administrator "Over the years I have spent nearly all of my money on my Harley-Davidson, my model boats and women. The rest of it I just wasted!" |
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rktman56 Model Questions Sep 30 2006, 02:16 PM
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