Big Jim posted:smd4 posted:Big Jim, please stop moving the goal post, and defend, if you can, these statements:
"The loss of pressure is that you are using boiler pressure to operate the injector."
"that large amount of steam used to operate the injector is exactly what sucks the pressure from the boiler."
I can tell you--and I know you already know this--that book learning can take you only so far. Before I put my hand on an injector or blower valve or atomizer, I had done the book reading. I knew all about the theory of firing; opening the blower to get more air throught the fire; keeping my water level up, but not too high; controlling the damper; keeping the fire box door closed to prevent cold air from getting sucked in. I read all the text books. I knew the theory.
Then one day they put me on the left cushion, luckily supervised, on a run (Will Sadler, posting below, was my mentor, and a good friend). Four miles. Two steep mile-long grades in either direction. Small steam locomotive, a switcher, pulling four 60-ton military flat cars built up as coaches, doing what it was never built for: pulling a train at speed.
The book learning--while helpful in understanding the theory, knowing what I was supposed to be doing, and why--went by the board pretty quick. Knowing how many pounds of steam would be used to lift so many gallons of water per minute didn't help me much when we were going up-grade, with low water and pressure dropping. Or when we were at the bottom of the grade, with the pops screaming and so much water in the glass that it was solid black. I sure didn't want to be responsible for a cracked cylinder head because the water was too high and I couldn't add any more.
You're right. Don't believe me. I haven't been doing this for even a decade. But Hot Water--one of the most experienced firemen around--told you, and yet you refuse to believe him: Adding water to the boiler with an injector lowers the boiler pressure because the water going in is cooler than the water in the boiler, and lowering the overall water temperature in the boiler means the pressure will go down as well.
Now, remembering that the Worthington system is an "open" system, the water supplied is near 212° +/-.
— Wrong.
Have you ever heard that using the FWH to supply the boiler will cause a loss of pressure? Is your answer No again? I haven't.— Wrong. Used in a drifting or standing (yikes) situation, a FWH can kill pressure. Also, if the fireman is behind on water and running the pump hard, it can impact the pressure.
Now, since both systems are suppying water at the same temperature.....- Still Wrong.
In order to heat the water to the velocity that it needs to be forced into the boiler and feed itself.
- Uh, what? Wrong. Heat doesn’t increase velocity. The diameter of the nozzle in the injector gets smaller, increasing the velocity of the water. After you get out of the shower (below), run your water hose outside with the nozzle both on and off of the end. See the difference in how far the water will spray in each scenario....but your water hose pressure remains the same.
Have you ever been taking a shower and the wife turns on the washing machine? (Referenced shower comment for above response)
Both systems supply water at the same point making this a moot point.
— Actually, Steve nailed it here with his previous comments.
Again both systems are supplying water at around 200°.
—- Again, wrong.
My only reply to this is, I was getting paid while doing it.
— Paid to run....or paid to pilot?
