via Naval Show. ru
On January, 18th the ceremony of a keel-laying of the first serial air cushion amphibious assault landing craft "Denis Davidov" of the project 21820 a class of "Dugon" is laid down on "Yaroslavl shipyard" JSC.The head boat of this project "Ataman Platov" has been laid down on February, 2006 and since 2009 carries out missions as a part of one of connections of the surface ships of Caspian fleet. The project of a landing boat is designed by the "R.E. Alexeev's Central Hydrofoil Design Bureau" (Nizhny Novgorod).The full displacement of air cushion amphibious assault landing craft of a class "Dugon" is 280 tons, the length - 45 m, the width - 8,6 m, the full speed - 35 knots. The ship is equipped with two diesel engines M507A-2D with a capacity of 9 thousand h.p. each. Load-carrying capacity - 140 tons, crew - six persons. It is possible to place on the boat three tanks or 5 armored transport vehicles .According to the Central Naval Portal, two more landing boats of the project 21820 will be laid down this year on "Yaroslavl shipyard".The building contract of a series of boats of this project has been signed by the Ministry of Defense and "Yaroslavl shipyard" JSC on June, 23rd, 2011I don't quite get this. The display ship doesn't look air cushion but who knows.
It's not what is commonly thought of as an air cushion. Rather it's a normal hull form broken up with an air cavity. I believe the hull cavity is somewhat thin with air blown in from the top.
ReplyDeleteBentley Yachts will sell you a yacht with one and has an illustration of an air cavity catamaran going 60kts.
http://www.yachtboutique.com/BentleyYachts/Advanced_Hulls.htm
According to most studies you gain about 7% in efficiency, maybe as high as 10%, in theory a large ship supposedly could gain as much as 20% but they haven't been able to get over 10% in water tank tests in the one study I read some time back.
thanks Lane. that cleared it up nicely.
DeleteAir supported vessel is the concept russians have used ,unlike Stilleto that uses geometry and light weight to create a cushion effect, heavier ships normaly have a separate powerplant or a compressor connected to main engines just for generating the air cushion ,drag reduction makes it more than worth while and as you can see the ship has high top speed of 35kn while being able to deliver 140tons to the beach.
ReplyDeleteThe use external power to crate air cushion under the hull
http://www.gizmag.com/air-support-hull-vessel/21697/
http://www.mshipco.com/military_m80.html
I believe this is a air-lubricated hullform. Bubbles blow along the underwater body allows for higher speeds.
ReplyDeleteIn any case it shows a high speed LCU sized boat which the USN should have but won't NIH~
Uh... how would that work in conjunction with a Prairie-Masker?
ReplyDeleteTake care.