- Why can a submarine go faster underwater than on the surface?
- Do submarines have to surface for air?
- What is the longest a submarine has stayed submerged?
- Can a submarine flip over?
- How fast can a submarine go on the surface?
- Who has the best submarines in the world?
- How many US subs were lost in ww2?
- How do submarines not run out of air?
- Why do submarines come to the surface?
- What is the quietest submarine in the world?
- Are submarines faster on the surface or underwater?
- What is the fastest US submarine?
- Can you smoke in a submarine?
- Are submarines safe from tsunami?
- What is the most dangerous submarine?
- Who has the fastest submarine?
- How do submarines get air?
- How do submarines dispose of human waste?
Why can a submarine go faster underwater than on the surface?
Frictional and pressure resistance happens for submarines and surface ships.
Frictional resistance happens as the water slide past the hull.
So, since submarines for the same speed see less resistance, only frictional and pressure and not wave.
So sumarines, for the same power, can go faster underwater..
Do submarines have to surface for air?
In order to control buoyancy, the submarine relies on special tanks that can be filled with water or air. To return to the surface, the tanks are filled with air. This makes the submarine less dense than the water around it, causing the sub to float to the surface.
What is the longest a submarine has stayed submerged?
The longest submerged and unsupported patrol made public is 111 days (57,085 km 30,804 nautical miles) by HM Submarine Warspite (Cdr J. G. F. Cooke RN) in the South Atlantic from 25 November 1982 to 15 March 1983.
Can a submarine flip over?
No – They cannot. It would never get into that situation. Generally submarines are not like planes – they don’t bank when they turn.
How fast can a submarine go on the surface?
How Fast Can a Submarine Go? This is classified as well. However, U.S. nuclear-powered submarines can go faster than 23 miles per hour, which is 37 kilometers per hour or 20 knots (nautical miles per hour) underwater.
Who has the best submarines in the world?
The US Navy currently operates around 40 older Los Angeles class submarines alongside the newer Seawolf and Virginia class boats. These submarines proved to be an exceptionally good anti-submarine platform. First boat of the improved Los Angeles class was commissioned back in 1988.
How many US subs were lost in ww2?
Fifty-two submarines of the United States Navy were lost during World War II.
How do submarines not run out of air?
A sub is actually far more self sustaining than the space station – due to the nature of water availability. The ISS WILL run out of air (oxygen) if it’s not periodically replenished, either as oxygen, or as water to make it from. As long as the reactor is running, a nuclear-powered submarine will NEVER run out of air.
Why do submarines come to the surface?
When the ballast tanks are filled with air, the submarine rises to the surface because it has positive buoyancy. With water inside the tanks, the sub has negative buoyancy so it sinks deeper into the ocean.
What is the quietest submarine in the world?
2020 — Saab’s Ghost stealthy technology, which stands for Genuine HOlistic STealth, is Saab’s quietest technology ever—and even quieter than their upgraded Gotland-class submarine. The incredibly low acoustic signature of this super-quiet submarine is achieved through a variety of means.
Are submarines faster on the surface or underwater?
Which is faster? A submarine meets more resistance under-water as opposed to on the surface, as on the surface a small fraction of the hull surface is meeting against air resistance instead of water resistance. This does not, however, mean that a submarine travels faster on the surface.
What is the fastest US submarine?
USS SeawolfThe fastest U.S. submarine, the USS Seawolf (SSN-21), is believed to reach up to 35 knots. Electric boat is reportedly working on an underwater craft capable of transporting Navy Seals at speeds up to 100 knots (185 kph / 115 mph) using supercavitation.
Can you smoke in a submarine?
The Navy announced today a ban on smoking aboard submarines while they are deployed below the surface after medical testing showed non-smokers suffered effects of second-hand smoke. … Mark Jones of the Commander Naval Submarine Forces out of Norfolk, Va., said about 40 percent of the submarine sailors are smokers.
Are submarines safe from tsunami?
Submarines are relatively unaffected by weather or tsunamis when submerged in deep open waters. … However if a submarine has to go shallow or to periscope depth then conditions on the surface become a major concern. Large enough waves can cause a submarine to be pulled (sucked) up to the surface.
What is the most dangerous submarine?
In 2018, the Virginia-class submarine USS John Warner (#8 on the list) launched Tomahawk missiles against chemical weapons facilities in Syria.
Who has the fastest submarine?
K-222 was laid down on 28 December 1963 and commissioned on 31 December 1969, at Severodvinsk. It was assigned to the Soviet Red Banner Northern Fleet for the duration of her career. It was the world’s fastest submarine, reaching a record submerged speed of 44.7 knots (82.8 km/h; 51.4 mph) on trials.
How do submarines get air?
Oxygen is supplied either from pressurized tanks, an oxygen generator (which can form oxygen from the electrolysis of water) or some sort of “oxygen canister” that releases oxygen by a very hot chemical reaction. … The carbon dioxide is trapped in the soda lime by a chemical reaction and removed from the air.
How do submarines dispose of human waste?
What happens to human waste in a submarine? … “Sanitary Tanks” inside the pressure hull hold the waste water from toilets, showers, etc and is usually pumped overboard. Submarines can also empty some of the sanitary tanks by pressurizing them and discharging them overboard.