John asks…
Where does the “air” go when a submarine submerges?
Is this air compressed and held in large tanks or does the pressure within the whole ship rise slightly with no or little need of “pressure tanks”?
John McTiernan Fans answers:
There is an outer hull which is what the average person sees in the pictures of submarines. Inside of that is a thick pressure hull. Between the two are ballast tanks. These tanks are open to the sea at their bottom (through large grates) and have vent valves at their top. When submerging the ballast tanks are vented in order to flood them, neutralizing the buoyancy of the submarine and allowing it to submerge.
The air in the ballast tanks are vented to the earth’s atmosphere.
Submarines now drive through their entire capabilities using the control planes of the submarine (be it rudder, stern planes, fairwater planes, or bow planes, depending on the class of submarine). While there are tanks within the pressure hull of the boat that allow for adjustments in buoyancy and trim it is the control planes and momentum that do most of the work.
The submarine can drive to the surface and operate on the surface without blowing their ballast tanks. These are pictures you see with the boat operating with its decks awash. In order to send people topside and moor the boat the ballast tanks must be blown out. Generally this is done a low pressure blower (with high volume). Since the submarine is able to take in outside air by raising a mast it takes in outside air and pumps it into the ballast tanks, evacuating them of water, and bringing the submarine higher out of the water.
When submerged at depth and a submarine needs to surface there are compressed air banks air very high pressure air that are able to quickly expel the water from the ballast tanks and send the submarine to the surface, like the “USS Dallas” did in the movie “Hunt for Red October”.
Robert asks…
Good military or action movies on netfilx?
Can you please give me names of awesome movies to watch!
John McTiernan Fans answers:
I’m assuming on netflix instant?
Military:
Jarhead (not an action movie though)
Black Hawk Down
Apocalypse Now (but very long)
The Hunt for Red October
Tears of the Sun (gruesome and dark though)
good action flicks:
The Terminator
Dirty Harry
Lethal Weapon
The Crow
Assault on Precinct 13 (70s–I haven’t seen the remake)
Lock, Stock and Two Smoking Barrels (british crime flick)
Enter the Dragon
The Chinese Connection
Linda asks…
Need a list of Hollywood movies only based on automobiles?
i need a list of Hollywood movies only based on automobiles(Cars,Bikes,Trucks,ships,aircraft etc)
please let me know the list
thanks in advance
John McTiernan Fans answers:
1.Days of thunder
2.Christine
3.Herbie
4.Titanic
5.Bmx bandits
6.Stealth
7.Blue thunder
8.Top gun
9.Convoy
10.Hunt for red october
11.Fast and the furious
12.Those magnificent men in their flying machines
13.The big bus
14.Speed
Ruth asks…
Who is your favorite actor to play James Bond and why?
for me its Pierce Brosnan i thought he did better than the others.
John McTiernan Fans answers:
Has to be Sean Connery, what a class act. Loved him in all the movies he made especially The Hunt for Red October.
George asks…
What are some good war movies on Netflix instant?
I’ve noticed they’ve recently removed a bunch of them like Apocalypse Now and Full Metal Jacket
John McTiernan Fans answers:
These are instant on Netflix:
- Jarhead
- Black Hawk Down
- Tears of the Sun
- Brothers
- The Hunt for Red October
- The Siege
- The Thin Red Line
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