10 Bizarre Locomotive Engines That Defied Logic
10 Bizarre Locomotive Engines That Defied Logic
Some engines follow the rules.
Bigger displacement, more cylinders, conventional layouts.
Then there are the engines that threw the rule book away entirely.
Two pistons sharing one cylinder.
Three crankshafts spinning in a triangle.
Steam turbines that sounded like jet engines.
These are the 10 locomotive engines that defied every logic.
Most diesel engines have a piston at the bottom of a cylinder and a cylinder head at the top.
The Fairbanks Morse 38D818 looked at that arrangement and decided it was unnecessary.
Instead, it put two pistons inside the same cylinder moving toward each other, compressing the air fuel mixture between them.
There’s no cylinder head and no valves, just two pistons meeting in the middle and forcing two crankshafts to spin at once.
The design came from German aviation technology.
Fairbanks Morse licensed the concept from Junkers in the 1930s and adapted it for American use.
During World War II, these engines powered submarines for the US Navy, where their compact size and fuel efficiency made them perfect for cramped engine rooms that needed to run for weeks without surfacing.
The 38D818 could produce serious horsepower from a smaller footprint than conventional diesels, and it burned fuel more efficiently because more of the combustion energy actually pushed the pistons rather than escaping through a hot cylinder head.
After the war, Fairbanks more saw an opportunity.
The engine worked underwater, it should work on land.
They brought their submarine technology to the railroads, building locomotives like the Eerie Built and the legendary Train Master.
The Train Master packed 2400 horsepower into a single unit, making it one of the most powerful locomotives of the 1950s.
Crews who needed brute force for heavy freight loved what it could do.
But submarine conditions and railroad conditions turned out to be very different things.
Subs had filtered air, climate control, and crews trained specifically for those engines.
Railroads had dust, dirt, temperature swings, and mechanics who’d never seen anything like a dual crankshaft layout.
When something went wrong, the entire engine had to be taken apart to fix it.
The parts were specialized and hard to replace.
Training crews to work on it was complicated.
The same features that made the 38D818 great underwater turned it into a headache on land.
Fairbanks Morse left the locomotive market in 1963.
The 38D818 never actually failed.
Still runs today in submarines and powers generators around the world.
The engine was ahead of its time, but it ended up in the wrong environment.
Sometimes the most advanced solution needs the right conditions to shine.
The Fairbanks Morse 38D818 was strange.
The Napier Deltic went even further.
It took the opposed piston idea and arranged it into a triangle.
Three banks of cylinders formed a delta shape with a crankshaft at each corner.
The engine had 18 cylinders and 36 pistons.
Three crankshafts spun together through a complex gear system.
Nothing else on earth looked or sounded like it.
The British company Dn Napier and Sun developed the Deltic in the 1940s.
Drawing on the same Junker’s technology that influenced Fairbanks Morse.
The Royal Navy wanted lightweight, high-power engines for fast patrol boats, and the triangular layout delivered exactly that.
By arranging the cylinders in a Delta, the Deltic achieved exceptional power density while keeping the whole package surprisingly compact.
The geometry also created near perfect mechanical balance, which meant smooth operation at high speeds.
English Electric saw potential for railways and adapted the Delta for locomotives.
The result was the British Rail Class 55 introduced in 1961.
Each locomotive carried two Deltic engines producing a combined 3,300 horsepower.
At the time, these were the most powerful single unit diesel locomotives in the world.
They hauled express passenger trains like the Flying Scotsman at speeds over 100 mph, earning a reputation for raw performance that few competitors could match.
The sound was unmistakable.
The two-stroke cycle and the roots blowers created a high-pitched whistling roar that rail fans still talk about today.
Deltics could be heard from far away and people gathered at stations just to hear them pass.
All that performance came with a price.
The triple crankshaft gearing was complex and maintenance needed skills most rail shops didn’t have.
When problems appeared, repairs were expensive.
British Rail ran the class 55s until the early 1980s, then replace them with simpler designs.
Many still survive today, running on heritage railways, where the distinctive sound draws crowds.
Peak engineering ambition sometimes means peak maintenance complexity.
The American locomotive company had built steam engines for decades.
When diesel started taking over after World War II, Alco scrambled to catch up.
The result was the model 244, a turbocharged four-stroke diesel that looked excellent on paper and fell apart in the real world.
Alco rushed the 244 into production around 1945 without enough testing.
Competitive pressure from EMD’s reliable 567 engine forced their hand.
Railroads needed power and Alco needed sales.
The first 244 powered locomotives rolled out in 1946 and problems followed almost immediately.
The turbochargers overheated, the crankshafts cracked.
Fuel pumps leaked into the crank case, diluting the lubricating oil.
The internal routing of fluid lines meant that when seals failed, contamination spread everywhere.
Alco spent millions on field repairs by 1948, but the damage to their reputation was already done.
Railroads that had trusted Alco for generations started looking elsewhere.
The 244 powered some genuinely iconic locomotives.
The PA series passenger units with their sleek Raymond Loey styling became symbols of postwar streamlining.
The RS3 road switcher sold over,300 units and proved incredibly versatile.
But behind the attractive bodywork, maintenance crews fought constant battles against an engine that seemed determined to self-destruct.
Later versions improved.
Water cooled turbochargers replaced the fragile air cooled originals.
Upgraded crankshafts reduced failures.
The successor model 251 introduced around 1955 addressed most of the problems.
But by then railroads had lost faith.
EMD captured the market and Alco never recovered.
They exited locomotive manufacturing in 1969.
The 244 taught the industry a brutal lesson.
Being first to market means nothing if your product breaks down on the mainline.
Ambition without testing creates a very expensive education.
For decades, EMD dominated American railroads with two-stroke diesels.
The 567, the 645, the 710.
Each generation refined the same basic formula.
Then in the 1990s, EMD decided to change everything.
The 265H was their bold leap into four-stroke territory, designed to produce 6,000 horsepower from a single engine and compete with G’s rising challenge.
The engine debuted in 1996, powering the SD90 MACH locomotives.
On paper, it represented everything EMD needed.
Massive output, modern technology, and the promise that one locomotive could replace two older units in heavy hall service.
Union Pacific and Canadian Pacific ordered them, hoping for a new standard in freight power.
Reality proved less cooperative.
The 265H pushed components hard.
Brakeman effective pressure.
The force inside the cylinders reached levels that stressed pistons, liners, and bearings beyond their limits.
Turbocharger problems appeared.
Cooling systems struggled.
Locomotives that should have been hauling trains spent too much time in shops waiting for repairs.
Only about 70 to 100 265H powered units were built for North America.
Many ended up repowered with the older proven 710 two-stroke that EMD had tried to replace.
The locomotive that was supposed to define EMD’s future instead became a symbol of how badly ambition can backfire when reliability suffers.
The 265H wasn’t a complete failure, though.
Derivatives evolved into the 1010 engine family that powers modern tier 4 compliant locomotives.
Hundreds run in export markets like China and India today, but in North America, railroads learn that the newest technology doesn’t always beat the engine that just works.
Sometimes the cutting edge cuts both ways.
Baldwin Locomotive Works built steam engines for over a century.
Diesel arrived, they tried to adapt.
The 608A was their answer.
An enormous inline 8cylinder turbocharged diesel designed for raw low-speed torque.
Each cylinder displaced nearly 2,000 cubic in.
The whole engine turned at just 625 RPM at full load, producing a deep thumping exhaust note that sounded like nothing else on the rails.
The 608A powered Baldwin’s final generation of road locomotives in the early 1950s.
The AS616 road switcher became a heavy hall favorite and the RF16 Sharknse cab unit earned iconic status with its distinctive Raymond Loey styling.
These locomotives could start the heaviest trains and keep them moving through mountain grades where raw pulling power mattered most.
But the 608A carried Baldwin steam era philosophy into a world that had moved on.
The engine was massive, complicated, and difficult to service.
Turbochargers failed or bearings wore.
Repairs took time that railroads couldn’t afford.
Baldwin’s service network never matched EMD’s nationwide system and parts availability lag behind competitors.
The low RPM design that delivered such impressive torque also created vibration problems that stressed frames and mounts.
Overheating plagued units and demanding service.
Railroads appreciated what the 608A could do when it worked, but they couldn’t justify the downtime when it didn’t.
Baldwin stopped building locomotives in 1956.
The company that had supplied power to American railroads since the Civil War couldn’t survive the diesel transition.
The 608A stood as their final ambitious effort.
Powerful, impressive, but ultimately unable to overcome the practical advantages of simpler, better supported designs.
Raw power means nothing if you can’t keep it running.
General Electric spent decades building electrical equipment for other companies locomotives.
In 1959, they decided to compete directly with their own designs.
The U25B was their opening move, a four axle road locomotive powered by the FDL16 engine producing 2500 horsepower, more than anything EMD or Alco offered at the time.
The Ubot nickname came from the U prefix for universal and the distinctive longnose profile that reminded some observers of submarine holds.
These locomotives look different from everything else on American rails with flat-sided hoods, eight tall engine room doors per side, and a pressurized car body that filtered air before it reached the engine and electrical systems.
Early FDL engines had problems.
Turbochargers failed.
Reliability lagged behind EMD’s proven 567.
Railroads that tried the first Ubot discovered that G’s promises sometimes exceeded their engineering.
But unlike Alco or Baldwin, GE had the resources and determination to fix what didn’t work.
Over the next decade, refinement steadily improved the FDL family.
The U30B reached 3,000 horsepower.
The U36B topped 3600.
By the mid1 1970s, GE had captured significant market share from EMD, and the FDL had proven itself tough enough for heavy freight service coast to coast.
The early Ubot represented a gamble that paid off.
GE accepted the initial troubles, invested in solutions, and kept pushing until they got it right.
That persistence turned them from an electrical supplier into a locomotive builder that would eventually dominate the industry.
Sometimes winning means surviving your own mistakes long enough to fix them.
Before Fairbanks Morse built submarine engines or napier arranged cylinders and triangles, Hugo Junkers was experimenting with opposed piston designs in Germany.
Starting in the 1890s, Junkers explored what happened when you eliminated cylinder heads entirely and let two pistons share the same combustion space.
His early work focused on stationary and industrial applications.
But by the 1920s, Junkners had developed vertical opposed piston diesels for aviation.
The Yumo 204 and Yumo 205 aircraft engines achieved remarkable fuel efficiency and power density, making them favorites for longrange flights where every pound of fuel mattered.
During World War II, the Yumo 205 powered Luftwaffa reconnaissance aircraft that could fly higher and farther than conventional planes.
These experiments became the foundation for everything that followed.
Fairbanks Morse licensed Junker’s technology for their marine and rail engines.
Napier built their Culverin as a direct Yumo derivative before developing the triangular Deltic.
Soviet engineers reverse engineered Junker’s design for thousands of TE3 locomotives.
The influence spread worldwide.
The opposed piston concept offered genuine advantages, better thermal efficiency, simpler valve arrangements, and compact packaging.
But it also demanded precise manufacturing and careful maintenance.
Same features that made these engines efficient made them unforgiving when operators cut corners.
Junkers never saw how far his ideas would travel.
He died in 1935 before submarines crossed oceans on his engine designs, before British express trains hauled passengers at 100 mph using principles he’d pioneered.
His experiments defied conventional engine logic and created a lineage that still influences diesel design today.
The boldest ideas often outlive their creators.
By 1944, the Pennsylvania Railroad knew steam was dying.
Diesels offered efficiency, reliability, and lower operating costs than traditional steam locomotives couldn’t match.
But the PRR wasn’t ready to surrender.
They commissioned one final experiment, a direct drive steam turbine that would combine steam’s raw power with the smooth continuous output of a turbine rotor.
The result was the S2 number 6200 built by Baldwin with a Westinghouse turbine.
Instead of pistons pumping back and forth, steamjet spun a massive turbine wheel at high velocity, delivering power through gearing to the driving wheels.
The mechanical efficiency reached 97%.
Almost no energy lost between the turbine and the rails.
At high speeds, the S2 could outrun anything else on the railroad.
The sound was unlike any steam locomotive before it.
Instead of the rhythmic chuff chuff of piston exhaust, the S2 produced a continuous whoosh that reminded observers of jet engines.
Four large exhaust pipes vented the spent steam, creating a signature audio profile that earned it the nickname Big Whoosh.
Test runs were impressive.
The S2 pulled a 17 car train to 112 mph at speeds above 45 mph.
It burned fuel and water more efficiency than conventional steam.
The constant torque eliminated wheel slip and delivered a smoother ride than any piston locomotive could provide.
But below 45 mph, the turbine became inefficient.
Starting heavy trains consumed enormous amounts of steam.
The single fixed gear ratio couldn’t optimize performances across the full speed range.
Maintenance proved expensive and complicated.
The S2 ran barely 5 years before storage and scrapping in 1952.
Steam’s most ambitious experiment couldn’t save the technology from diesel’s practical advantages.
Even the most impressive performance can overcome everyday limitations.
The diesel revolution in America railroading nearly ended before it began.
The Winton 2011A, the engine that powered the famous Burlington Zephyr on its record-breaking 1934 run from Denver to Chicago, was plagued with problems that almost killed the entire concept.
Winton Engine Company, acquired by General Motors in 1930, developed the 2011A as a two-stroke diesel for rail cars and locomotives.
The engine used uniflow scavenging, unit injectors, and a roots blower to produce power from a relatively compact package.
On paper, it represented the future of railroad motive power.
In practice, it leaked constantly.
Crankase seals failed.
Pistons scuffed against cylinder walls.
Cylinder head assemblies allowed fluids to contaminate each other.
The Navy tried 2011A engines and submarines and eventually retired them during World War II because they couldn’t be trusted.
Early locomotives spent as much time in shops as they did hauling trains.
The Zephr’s famous non-stop run was part luck and part careful operation.
GM knew the 2011A wasn’t ready for sustained heavy science, but they needed the publicity to justify continued development.
Behind the scenes, engineers worked furiously to understand what was failing and why.
Charles Kdaring and his team at GM Research eventually solved the problems.
Their fixes became the foundation for the EMD 567, introduced in 1938, which proved so reliable that it dominated American railroads for decades.
The 567 addressed every weakness of the 2011A.
Better seals, stronger components, simpler maintenance.
The engine that almost failed became the direct ancestor of diesel dominance.
Without the 2011A’s troubles forcing GM to invest in solutions, the 567 might never have achieved its legendary reliability.
Failure properly studied becomes the foundation for success.
For generations, locomotive engineers followed a simple rule.
More cylinders meant more power.
To get 4,400 horsepower, you needed 16 cylinders.
That’s just how it worked.
Then General Electric built the JVO 12 and proved everyone wrong.
The JVO2 powers the Evolution series locomotives that dominate North American freight today.
It produces 4,400 horsepower, the same output as the 16cylinder engines it replaced from just 12 cylinders.
Fewer moving parts, less friction, lower fuel consumption, better emissions.
The engine that seemed to defy basic arithmetic actually followed smarter engineering.
GE achieved this by increasing displacement per cylinder.
Each JVO2 cylinder displaces about 950 cubic in compared to roughly 668 for the older FDL16 design.
Larger cylinders burning more fuel per stroke extracted more power from fewer combustion events.
Advanced turbocharging, electronic fuel management, and improved thermal efficiency completed the package.
The results speak for themselves.
JVO2 locomotives burn 5 to 7% less fuel than their 16cylinder predecessors while meeting strict EPA tier 2, three, and four emission standards.
Over thousands of locomotives running millions of miles, those efficiency gains translate to billions of dollars in savings and significantly cleaner air.
By the mid2020s, over 7,000 JVO powered locomotives were hauling freight across North America.
Union Pacific, BNSF, CSX, Norfolk Southern, and the Canadian Railroads, all standardized on Evolution series power.
EMD’s two-stroke designs could match the efficiency, and GM’s gamble on fewer, larger cylinders paid off completely.
The JVO2 proved that innovation doesn’t always mean adding complexity.
Sometimes the smartest solution removes parts instead of adding them.
The best engineering often means doing more with less.
10 engines explored different ways to solve the same problem.
How to make a locomotive move.
Some designs failed spectacularly, while others changed the industry forever.
None of them accepted that conventional was good enough.
The engineers who built these power plants understood that progress requires risk and the safe choice rarely leads to anything new.
