There were several attempts at the steam/diesel combined-in-one-cylinder cycle engines.
That's two double acting opposed pistons in each cylinder, diesel fired in the center, a la Fairbanks-Morse OP engines, with steam acting on the outer ends. the water cooling jacket on the diesel center section acting as a boiler feed water preheater, and the diesel engine exhaust ran through a flue in the boiler shell.
The first attempt was a 4-6-2 by Ansaldo around 1926, the second was the 2-6-2 Kitson-Still locomotive of 1927
http://www.lner.info/locos/IC/kitson.shtml
http://www.aqpl43.dsl.pipex.com/MUSEUM/ ... tsonst.htm
and, not daunted by the failures of these examples, the Soviet Union constructed at lest four different ones before and during the war. http://www.aqpl43.dsl.pipex.com/MUSEUM/ ... ssrefr.htm
Terrificly complicated monsters, various claims were made as to thermal efficiency and various schemes attempted to overcome the many drawbacks, finally the concept was completely obsolete by the commercialization of diesel-electric transmission.
edit to add: I originally thought this thread was in the "Steam locomotives" forum, but now I see it's a Pennsy railfan thread.If the OP is interested in Pennsy steam only, I wonder just how many "concept" engines that company produced, may be a very limited topic.
I leave it to the moderators to decide if the thread should be moved or if my reply is off topic and to remove it.
That's two double acting opposed pistons in each cylinder, diesel fired in the center, a la Fairbanks-Morse OP engines, with steam acting on the outer ends. the water cooling jacket on the diesel center section acting as a boiler feed water preheater, and the diesel engine exhaust ran through a flue in the boiler shell.
The first attempt was a 4-6-2 by Ansaldo around 1926, the second was the 2-6-2 Kitson-Still locomotive of 1927
http://www.lner.info/locos/IC/kitson.shtml
http://www.aqpl43.dsl.pipex.com/MUSEUM/ ... tsonst.htm
and, not daunted by the failures of these examples, the Soviet Union constructed at lest four different ones before and during the war. http://www.aqpl43.dsl.pipex.com/MUSEUM/ ... ssrefr.htm
Terrificly complicated monsters, various claims were made as to thermal efficiency and various schemes attempted to overcome the many drawbacks, finally the concept was completely obsolete by the commercialization of diesel-electric transmission.
edit to add: I originally thought this thread was in the "Steam locomotives" forum, but now I see it's a Pennsy railfan thread.If the OP is interested in Pennsy steam only, I wonder just how many "concept" engines that company produced, may be a very limited topic.
I leave it to the moderators to decide if the thread should be moved or if my reply is off topic and to remove it.
