Another gearhead interest post re Deisel power.

[Pio1980]

https://www.dieselarmy.com/engine-t...ses-one-of-the-worlds-largest-diesel-engines/
Gigantic double-acting opposed piston valve uniflow two stroke Deisel engine.


Note that there is a piston valve on either side of the power piston for each of the two combustion chambers

https://dieselhouse.dk/en/

 

[quaddriver]

nice supersized FM knockoff....

 

[Pio1980]

nice supersized FM knockoff....

Not really, quite different. Check the cutaway drawing and look at the breathing, the smaller short stroke opposing pistons on either side of the larger full stroke double ended power pistons are also acting as exhaust valves, with forced induction intake at the skirt ports at the center of each large bore valved by the power pistons, sweeping out the bores with fresh air. A very elegant arrangement.

Double acting vertical IC Diesel engines are very rare, this is the only one I've seen.


FM OP

 

[Pio1980]

This engine as an eight cylinder double ended two-stroke runs equiv a 32 cylinder four stroke, with two power pulses per revolution per cylinder vs one for every two revolutions.
https://www.dieselarmy.com/engine-t...ses-one-of-the-worlds-largest-diesel-engines/

 

[bowtie427ss]

Best description given here:

 

[Pio1980]

@quaddriver
Some background on the FM OP:
https://www.producer.com/crops/opposed-piston-engine-developed-140-years-ago/

 

[arts]

Haha, at least I can carry an FM piston; that big bugger is in a whole 'nother world!

 

[quaddriver]

@quaddriver
Some background on the FM OP:
https://www.producer.com/crops/opposed-piston-engine-developed-140-years-ago/

i only got to crawl on 2, an h16-44? at hagertown museum and the reyquin docked in pitt. would have loved t o have heard a big trainmaster rev up

 

[usedto]

Haha, at least I can carry an FM piston; that big bugger is in a whole 'nother world!

View attachment 2316038

Need one of my rods?

 

[Pio1980]

i only got to crawl on 2, an h16-44? at hagertown museum and the reyquin docked in pitt. would have loved t o have heard a big trainmaster rev up

Napier licensed OP from Jumo and developed their own version, the Culverin, which received no orders or sales after seven were built. The idea was then shelved there for a number of years.
https://oldmachinepress.com/2019/09/05/napier-deltic-opposed-piston-diesel-engine/