Why do ships use two stroke engines?

When a ship is being constructed in a shipyard, the most important machinery that is to be selected is the main propulsion machinery. A two-stroke engine can burn low-grade fuel oil and hence reduce the running cost of the ship.

Can rain put out a jet engine?

Although rain is capable of hindering the function of a jet engine, it is rarely a noticeable effect. The majority of storms do not create enough rain or snow to disturb the engines, and the ice crystals that clouds are made of are far too small to affect function.

Why do jet engines work in the rain?

During freezing rain while sitting on the ground waiting for takeoff, pilots are also trained to rev the engines frequently to prevent ice accumulation. Another design feature that helps keep a jet engine operating in heavy precipitation is igniters, similar to spark plugs, in the combustion section.

What fuel did ww1 ships use?

Coal was phased out after the First World War and essentially from 1930s two fuels dominated in the RAN, the heavy oil Navy Special Fuel Oil (NSFO) commonly referred to as Furnace Fuel Oil (FFO) and Diesel Fuel Oil. Diesel fuelled ships were patrol craft, submarines and general purpose vessels.

When did oil replace coal on ships?

In the 1920s, virtually all of the world’s steam-powered ships burned coal. However, in the 1950s oil emerged as a cheaper, cleaner, less bulky alternative, and the coal-fired ship became just about obsolete, with the exception of a few “dinosaurs” of the species still in operation on the Great Lakes.

Why are propeller engines called jets?

In almost all cases, propeller engines you see on commercial aircraft are actually “turbo props” which means you have a propeller driven by a turbine engine. Thus, they are all turbine engines and thus they are all jets. That’s not technically correct but the term “jet” doesn’t actually mean anything in this context.

Why do different planes have different contrails with different engines?

To the first point regarding the different engines- you need to get a screen shot of an aircraft with an apu running in flight- sometimes the apu creates a contrail when the engines aren’t and vise-versa. Same aircraft, same altitude- different engines, different contrails.

What are the advantages of a jet aircraft?

They are resistant to foreign object damage, they are more fuel efficient at low altitudes, they accelerate the airplane faster on takeoff, and they have more efficient reverse thrust. If you want to fly high and hard and fast, and you have long, paved runways, a jet is the way to go.

Why do some planes leave trails and others do not?

Now there are two main reasons why some planes leave trails and some nearby planes do not. The less common reason is that different planes have different engines. Some engines will leave a contrail in the air where another engine will not.