Homemade Sub - Axle to engine/prop connection

[Slayer_42]

Hey there.
Im currently designing a submarine which i plan to construct later on in life when i have the funds required for such a project.
I was just wondering, how did the propeller axle pass through the stern of the boat on a real sub in a way that allows the fixture to be waterproof even at a high pressure? :hmm2:

cheers :rock:

[U570]

Have a read through this, it's the Training Notebook for the Oberon Class, and it has all details about the shafts, including seals.
http://www.hnsa.org/doc/oberon/propellers/index.htm#toc

[Slayer_42]

Beautiful! thanx alot mate. Now to design a compromise.... :P

[Beardmoresam]

I'm sure there must have been vast improvements since the early 1900's.
If memory serves me well, the glands used on subs at the time were actually a bit faulty, although I can't remember a source for that info.

I think maybe something I read about T Class boats in the RN during the 40's.

edit -- http://www.go2marine.com/productcenters/shaftseals/

I think glands are a thing of the past now.

[Slayer_42]

awesome! have looked at that link and that has given me a good grounding from which to research different methods. I have designed a shaft seal which uses Turcon (A rubber like material capable of withstanding very low and high temperatures) seals. Not an original idea at all, copied it from this one http://www.youtube.com/watch?v=6pJfVKc5wZk&safe=active

Just changed the design slightly to make it more cost effective.

[Slayer_42]

Not sure if this thread is still being viewed or not but i came up with an interesting idea. I plan on using a diesel engine and was thinking about the exhaust. And then i was thinking propeller shaft glands. What do you guys think about injecting the exhaust directly into a gland inside the shaft housing? this way the exhaust air and fumes etc will seal out any invading water.