Physics is one of my favorite ways to argue with someone.
@crazycoffee
11 ай бұрын
Then it turns to theoretical physics depending on who you ask lmaoo
@madmanmapper
11 ай бұрын
I could see how a pump moving very fast might just cavitate instead of pulling water, but damn, I think it'd have to be moving extremely fast to do that.
@AEKarnes
11 ай бұрын
I have seen these pumps give good service into the thousands of RPM on high performance steam plants, such as high speed launches. They will cavitate but at the speeds most of these engines run, not unless they are ported badly or ingoing feedwater to their suction is near boiling point.
@craigspicer4296
11 ай бұрын
Its great to watch you in Action. Its like watching a master piece unfold ever time. You take us back in time to where steam had its day and master pieces of mechanical brilliance was bought to life. Thank you for your hard effort and your team making this possible.
@thegreenphantom4304
11 ай бұрын
Great engine and very true, too many people underestimate old engines!
@jrkorman
11 ай бұрын
I love how quiet that engine runs; the word I would use is "soft".
@lolMyke
11 ай бұрын
Love the videos Mr karnes please keep up the excellent work
@RustyorBroken
11 ай бұрын
I have no idea what you just said, but you sound like you really know what you are talking about. So, I am going to go ahead and mark this as the correct answer.
@rhavrane
11 ай бұрын
Bonjour Alexander, I am not familiar with this type of pump but I have complete confidence in your great knowledge of the world of steam 👍 Amicalement, Raphaël
@ttm2609
11 ай бұрын
Also depends on evaporation rate of the boiler when the engine is under full load. Lovely engine btw ❤
@Rainhill1829
11 ай бұрын
Beautiful Vierzon.
@CherryBerry48
11 ай бұрын
wow i love your area/yard. fascinating pump talk
@johngroenen
11 ай бұрын
I think it is said that crosshead/eccentrick driven pumps are less efficient at high rev's. Or so say it in another way, those pumps work more efficient at low rev's.
@AEKarnes
11 ай бұрын
Depends on the design of the pump. They will only cavitate if they are not supplied with positive suction head, if they are ported too small or if ingoing feedwater is near boiling temperature.
@TeamshakeNbake
11 ай бұрын
I'm interested in learning more about steam powered systems what specific literature should I be looking for
@darkhorsegarage9623
11 ай бұрын
Well thank you for that.. it’s a great weight off me mind.
@АнтонОстроконь-б8р
11 ай бұрын
СПАСИБО!👍🚂
@Odinnyb13
11 ай бұрын
are crosshead less prone to failure than an injector. or is it more prone or about just the same?
@AEKarnes
11 ай бұрын
Only if in extremely bad condition. An injector is a fairly precise instrument and not a positive device and will "knock off" for many more reasons than will stop a pump from operating.
@CaptainCrutch
11 ай бұрын
Still doesn’t work when it’s stopped, unlike an injector, which is the real reason everyone swapped over to injectors at the earliest possible convenience.
@AEKarnes
11 ай бұрын
If you are a good fireman it doesn't have to work when stopped, but we had steam driven pumps for that. You can also run the water through an infinite amount of preheaters before the boiler check with a pump while you cannot with an injector. The reason American machines fell into injectors so early was, sadly, laziness on the maintenance side, and only then began going back to steam driven pumps when the age of feedwater heating came.
@CaptainCrutch
11 ай бұрын
@@AEKarnes interesting then that many 19th century locomotives and tractors weren’t equipped with these steam driven water pumps, and instead were documented to have similar crosshead pumps to that in the video which required actually operating the machine in order to deliver water to the boiler. Where’s the steam driven pump on your engine Alex?
@AEKarnes
11 ай бұрын
@@CaptainCrutch Because that's generally all they needed, but usually engine driven pumps were married with steam driven pumps especially overseas. All the pre grouping stock beattie fitted with them had rotative single cylinder pumps on the side, as does still Prins August still running in Sweden. Mine has no seperate steam driven pump because the engine driven pump is all it or any of its sisters ever needed. Every other Merlin like this running in France has the same fitout.
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