Hi Bob! You said:
"12lbs. trainline/ER leakage in a minute? How did that guy ever get out of the terminal or move a train enroute with that, " Because "technically" the locomotive's EQ passes the requirements for a leak test: 5 lbs or less in 1 minute. (Leak testing a brake valve's EQ is essentially the same as testing the train brake pipe leakage as per a Class 1 Air Test.) The problem is when you put the two together: A train brake pipe (that ALWAYS has a minimal amount of leakage) with an EQ that won't maintain. The only time the leaking EQ is a problem is when air is drawn off the brake pipe for a set, (so the recharge systems are now closed off), and the maintaining feature of the brake valve system kicks in to maintain that brake pipe pressure. (Remember those non-maintaining brake valves we USED to use? i.e. the 6 series???) Anyway, THAT is where a leaking EQ will get'cha. Otherwise, when the brakes are in the released state, the air pumps and regulating valve can do their things and keep the line charged at 90lb PSI. However, I'm sure you already knew this so I reckon' I'm preachin' to the choir again. :-) FWIW, I think that engineer will have that same foul engine as a northbound lead tonight when he goes to work the night shift job. (Will its 92 Day FRA inspection date EVER get here????) Yup, you're right. We'd better close out this off-topic discussion and return to saving the S scale hobby. Andre ----- Original Message ----- From: shabbona_rr To: [email protected] Sent: Monday, December 05, 2011 3:54 PM Subject: Re: {S-Scale List} Moderling Earlier Eras in S Andre: 26C's are what we had on the majority of Santa Fe locomotives. CCP engines (ex-IC/ICG for the most part) had the 26L's and for good reason! They were not equipped with operative dynamic brakes. Using the PASS position was supposedly "against the rules", of course. especially with all the expert "coulda' done, woulda' done, shoulda done" laying in the weeds just waiting for someone to stub their toe? I suppose we better get back to arguing modern versus period S scale railroading before someone accuses us of going off-topic, etc. Bob Nicholson --- In [email protected], "Andre Ming" <laming@...> wrote: > > Hi Bob! > > Yup, the PASS setting also works great for a leaking EQ if you have a 26L brake valve. You're poop outta' luck with a 26C valve. (2 positions: In/Out.) > > In fact, I know of an engineer (know him very well, in fact) that just the other day had a 4,000 ton train, and the lead locomotive in his consist had a 26C with an EQ that leaked and thus wouldn't maintain. With a train behind the consist (and all the air leaks that accompany a train), once a minimum reduction was made (about 6 lbs), it would draw on down to 12 lbs in less than a minute, and keep on drawing off your air. Of course, left unabated, you will be stopped within another minute. That's a prescription for disaster. Anyway, this engineer I know very well said "to heck with this" and used the Regulating Valve to safely bring them down the hill to a drawbridge (in the up position) on a river. > > > ----- Original Message ----- > From: shabbona_rr > To: [email protected] > Sent: Monday, December 05, 2011 5:09 AM > Subject: Re: {S-Scale List} Moderling Earlier Eras in S > > > Andre: > > Judicious use of the regulating valve will prevent that from happening. I remember a story about a railroad that wanted to fire an engineer for descending maountain grades by using the regulating valve to maintain brake pipe pressure with K-type brakes. > > They got all set up for a ring-a-ding-ding kangaroo court, and even had a representative from the air brake manufacturer to drive the final nail in their case against the engineer. His testimony wasn't exactly what they wanted to hear. > > He testified that the engineer had better use the regulating valve, unless the railroad wanted a pile of scrap at the bottom of the mountain. Case closed! > > Bob Nicholson _________________________________________ > > PS - the "passenger" setting on #26 brake valves serves the same purpose. That's how we got down the hills with no dynamic brakes > ________________________________________________________________ > > --- In [email protected], "Andre Ming" <laming@> wrote: > > > > Gotta' be careful though when decending heavy grades (as on my V scale Colorado Midland route)... or you can... umm... uhh... "potty" away your air and away you go! (Ahhhgggghh!!!! LOOK OUT BELOW!!!) > > > > Fun is where you find it! > > > > Andre Ming > > > > > > > > [Non-text portions of this message have been removed] > > > > > > > ------------------------------------ > > Yahoo! Groups Links > > > > > > [Non-text portions of this message have been removed] > ------------------------------------ Yahoo! Groups Links [Non-text portions of this message have been removed] ------------------------------------ Yahoo! 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