HOW DOES SHIP MOVE ? #propeller #shipworking #marinepropeller

A propeller is a rotating fan-like structure which is used to propel the ship by using the power generated and transmitted by the main engine of the ship. That's the most straightforward answer for one of the most common questions asked about ships - How Ship Run in Water? or How does ship move in water?

The transmitted power is converted from rotational motion to generate a thrust which imparts momentum to the water, resulting in a force that acts on the ship and pushes it forward.

Marine propellers are made from corrosion-resistant materials as they are made operational directly in seawater which is a corrosion accelerator. The materials used for making marine propeller are an alloy of aluminium and stainless steel. Other popular materials used are alloys of nickel, aluminium and bronze which are 10~15 % lighter than other materials and have higher strength.

Let's see how the thrust generated by the propeller helps the ship to move forward or backwards and what are the effect of different types of trusts on ship's movement.
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[redgolf]

In all of your animations the propeller is rotating in the wrong direction compared to your directional movement description.

[patricj]

The propeller is a fascinating invention. The gradual change of pitch between middle of the axle and the tips gives it a beauty. The difference between a water propeller and an air propeller is also interesting. A water propeller is more round and wide while an air propeller is narrow and long. I understand it has to do with the difference in density and centrifugal force. An airplane could indeed use propeller shaped like a boat propeller, but it would not be as efficient. And if a vessel had an airplane propeller shaped propeller it would not withstand the forces and be broken.

[Aquarat]

I'm doing research to design a futuristic underwater vessel for a book that I'm working on. Great video!! Thank you!!

[dougodgers]

Clear no nonsense explanation. Thanks.

[edwardbinceleones]

i hope someday marine insight will explain also the 4 pillars of IMO

[Complete]

When ship moves ahead due to axial thrust generated by propeller the wake is generated along the surface of hull .where the velocity of watwr around the hull is same as the ship and decrease as the distance from this ship increases....
This wake causes the deduction in thrust for propeller...
Means when propeller is in open water and producing thrust will definitely more then the thrust produce by propeller when it is on aft of the ship ...This wake resistance is also called as augment of resistance

[sufisoul]

Good content 👍. Hope learn more about ships and its engines.
Keep posting.

[Ozi_bro]

1st question - What size of propellar shaft ?
2nd question - what is the temprature of propellar shaft and shaft bearing ?

[rajanjoseph]

How and where the negative force of the revolving propeller focus in the ship? In the engine or any other part?

[Complete]

What's the role of Transverse thrust in Contra rotating propellers?

[pavelbursa]

The propeller is rotating opposite direction to the movement of the boat?

[vincentsaldanha]

What is the weight of a piston of ship engine normally

[ashwindevms]

what is the reason for less efficiency when going astern

[sambathraj]

Why fitted ring shape construction in near of the propeller

[unnikrishnannairkrishnannair.]

Ttip velocity generated by ships blade is about 45 m per sec. Hence pressure ill be 8 kg per sq cm. How water from it can flow in horizontally. Only sub marine propeller can work efficiently, having tip circle /shroud to deflect radial component into horizontal

[hamidzarghy]

Dear Sir, How we could possibly measure the ship propeller thrust non-intrusively???

[unnikrishnannairkrishnannair.]

I am designing dewatering pumos to drain hundredes of acres water. I felt reciculation between radious 50%up to hub

[objammeh]

Interesting facts, I have learned something new 🆕

[stephensmalldridge]

This is all well and good, except you are calling a left hand propeller a right hand propeller and showing forward thrust in the direction that reverse thrust would be occurring

[nikpit]

When we walk we don't push the floor backwards with our feet. If this were the case and traction was applied on our soles we would instantly fall on our backs. Instead we lean forward and are constantly trying to fall on our face and constantly refrain from doing so by placing our legs alternately before us.