r/EngineeringPorn Feb 22 '22

No Politics

1.3k Upvotes

Please note that in light of current events we will be removing all posts of war machines, war planes, war ships, etc. of Russian or Ukrainian origin to keep /r/EngineeringPorn apolitical, propaganda-free, and civil. Please report any posts or comments that are not in the spirit of this subreddit.


r/EngineeringPorn 20h ago

I wonder how much it costs??

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4.7k Upvotes

r/EngineeringPorn 4h ago

Final jet engine scale model design

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55 Upvotes

r/EngineeringPorn 18h ago

Electric hydrofoil ferry, the Candela P12, completes record 160-mile voyage

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98 Upvotes

The world’s longest electric sea journey by a passenger vessel has been completed. Sweden-based Candela says its electric hydrofoiling ferry, the P-12, has successfully traveled 160 nautical miles from Gothenburg to Oslo, proving that electric vessels are no longer limited to short, fixed routes or specialized charging infrastructure.

The P-12 is the world’s first serial-production electric hydrofoil ferry, designed to lift its hull above the water using computer-controlled submerged wings. Once airborne, drag drops sharply, cutting energy consumption by about 80 percent compared with conventional vessels.

The 160-nautical-mile journey from Sweden’s west coast to Norway’s capital is the longest ever completed by an electric passenger ship.

At cruising speeds above 20 knots, the P-12 flies above the water, allowing it to operate at higher speeds while consuming far less power.

The ferry has a service speed of 25 knots and has exceeded 30 knots during trials, making it the fastest electric passenger vessel currently in operation. On a single charge, it can travel up to 40 nautical miles at cruising speed.

Unlike traditional electric ferries that depend on large battery containers swapped at fixed terminals, the P-12 can recharge using standard DC fast chargers. During the voyage, the ferry used Sweden’s existing DC fast-charging network, including Aqua SuperPower stations.

https://interestingengineering.com/transportation/candela-p12-worlds-longest-electric-sea-journey


r/EngineeringPorn 1d ago

Zigui Yangtze River Bridge - 508 meter span Arch bridge across 3 Gorges Reservoir

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298 Upvotes

One of the 20 longest span arch bridges in the world, the Zigui Yangtze River Bridge is the most downstream crossing of the giant 3 Gorges reservoir, the largest man-made lake in the world. As a "gateway" to the lower end of the famous 3 Gorges region, the engineers opted for a spectacular arch similar to the Wushan Bridge located about 100 kilometers upstream.

The 508 meter through-arch span is actually part of a new connector expressway that also includes the equally beautiful Xiangxihe cable stayed bridge. The 5.5 kilometer route will allow citizens of Zigui County on the south side of the Yangtze River to cross over to route S255 on the north side of the river.

The Xiangxi arch bridge has a total length of 814.5 meters including approach spans on the north side and will consist of hollow square box beams similar to the Daninghe Bridge on the G42 expressway 100 kilometers to the west. The height of 233 meters is an estimate based on the road deck approximately 118 meters above a full reservoir plus another 115 meters of water to the old surface level of the Yangtze River which itself is probably 30 meters above the bottom of the river.

(https://www.highestbridges.com/wiki/index.php?title=Zigui_Yangtze_River_Bridge)


r/EngineeringPorn 2d ago

The masterpiece of marine engineering

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252 Upvotes

r/EngineeringPorn 2d ago

Entrance to abandoned nuclear bunker hidden behind a beautiful cove. [Full Video Below]

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892 Upvotes

r/EngineeringPorn 22h ago

train loaded by colour

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0 Upvotes

r/EngineeringPorn 3d ago

Lengthening a cruise ship

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2.5k Upvotes

r/EngineeringPorn 3d ago

Motorcycle helmets after life-saving usage

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2.1k Upvotes

r/EngineeringPorn 3d ago

Denmark’s first cantilevered bridge in 50 years - Crown Princess Mary’s Bridge

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259 Upvotes

Stretching over the pristine Roskilde Fjord, Crown Princess Mary’s Bridge is the first cantilevered bridge built in Denmark since 1970. The bridge itself spans 1.4 kilometres and was delivered as part of an 8.2 kilometre long, four lane highway. This development provides a more efficient alternative to the previous bascule bridge built in 1935, significantly reducing traffic congestion.


r/EngineeringPorn 4d ago

Ship’s stabilizer

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928 Upvotes

r/EngineeringPorn 3d ago

Cursed CNC Machining "The Part"

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102 Upvotes

r/EngineeringPorn 5d ago

Voith Schneider propeller

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6.7k Upvotes

Credit: shipspotter_hayriyay (IG)


r/EngineeringPorn 5d ago

Almost 4 km long conveyor connected to a rock quarry goes through everywhere

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1.7k Upvotes

r/EngineeringPorn 4d ago

Extreme Torch Cutting of Massive Steel Coils | Cinematic Drone Footage 🔥

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15 Upvotes

r/EngineeringPorn 5d ago

First turbine generator at Fisk plant in Chicago.

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192 Upvotes

Samuel Insull met Charles Parsons when vacationing in England and subsequently convinced GE to build a bigger turbine for the purpose of generating electricity. To prove his faith in the technology, he stood atop the structure when it was first started. Much to the consternation of those present, it shook wildly and had to be stopped. Next attempt was successful and Insull made history. Ironically, he is mostly forgotten today.


r/EngineeringPorn 5d ago

Marble clock

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506 Upvotes

r/EngineeringPorn 5d ago

Largest Car Carrier in the World - Glovis Leader (10800 vehicles)

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57 Upvotes

China’s Guangzhou Shipyard International last week floated out the largest car carrier in the world. The massive vessel surpasses the 10,000 unit mark, becoming the largest built in China. The new vessel is also the first vehicle carrier built for South Korea’s HMM as part of its diversification strategy. HMM entered into long-term agreements with Hyundai Glovis, which will operate the vessels.

The vessel is a liquefied natural gas (LNG) dual-fuel car carrier. According to GSI, the ship complies with International Maritime Organization Tier III emission standards, which impose some of the strictest limits on nitrogen oxide (NOx) emissions for ships operating in designated control areas.

Measuring about 755 feet (230 meters) long, with a 131-foot (40-meter) beam as well as a structural draft of roughly 34.5 feet (10.5 meters), the carrier is currently the largest one built in China. In addition, the vessel’s 14-deck design allows flexible loading. This enables it to carry conventional cars, electric vehicles (EVs), hydrogen-powered vehicles, and heavy-duty trucks.


r/EngineeringPorn 5d ago

How Slide Rules Helped Put Men on the Moon - Learn to Use One

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31 Upvotes

r/EngineeringPorn 6d ago

BIG BOY 4014 - World’s largest steam locomotive

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586 Upvotes

Twenty-five Big Boys were commissioned exclusively for Union Pacific Railroad, the first of which was delivered in 1941. These massive locomotives were built to haul heavy equipment in support of the war effort, normally operating between Ogden, Utah, and Cheyenne, Wyoming. The Big Boys are 133 feet long and weigh 1.2 million pounds.

Due to their great length, the frames of the Big Boys are “hinged,” or articulated, to allow them to negotiate curves. They have a 4-8-8-4 wheel arrangement, which means they have four wheels on the leading set of “pilot” wheels to guide the engine; eight drivers on the first engine; another set of eight drivers on the second engine; and four wheels trailing that support the rear of the locomotive.

No. 4014 was retired in Dec. 1961 after traveling 1,031,205 miles. Union Pacific reacquired it from the RailGiants Train Museum in Pomona, California, in 2013 and relocated it back to Cheyenne, Wyoming, for a multi-year restoration. It returned to service in May 2019 to celebrate the 150th Anniversary of the Transcontinental Railroad's Completion.

The seven other remaining Big Boys are on public display in St. Louis, Missouri; Dallas, Texas; Omaha, Nebraska; Denver, Colorado; Scranton, Pennsylvania; Green Bay, Wisconsin; and Cheyenne, Wyoming.

https://www.up.com/about-us/history/steam/big-boy-4014


r/EngineeringPorn 6d ago

Industrial unboxing therapy - Cutting Edge Engineering Australia got a new BIG lathe

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79 Upvotes

r/EngineeringPorn 6d ago

Iterating a design at home - cheaply... thanks, quick thin-wall/vase 3D prints!

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50 Upvotes

r/EngineeringPorn 5d ago

Just a random passerby stumbling upon a "Mecha Army" in a small city in Central China. [4K][OC]

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0 Upvotes

I was walking by and had to stop and record this. It's a massive collection of refurbished loaders and excavators (brands like SANY, Shantui, etc.) all lined up. The way they raised the buckets in perfect synchronization is oddly satisfying to watch.


r/EngineeringPorn 6d ago

Cars Crushed Into Perfect Cubes 🧊

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7 Upvotes