ex-MARC Units Discussion

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Re: ex-MARC Units Discussion

Postby F-line to Dudley via Park » Wed Mar 30, 2011 10:40 pm

MBTA1052 wrote:Even I believe North Side has more RR Crossings than South but I could be wrong.


Quite a lot more. Southside has none whatsoever inside of 128 and none before any of the lines split. Northside has dozens in the inner 'burbs. NYNHH and B&A pursued crossing eliminations much harder than B&M ever did. Only the Lowell Line is close to total grade separation on the northside, with just the 2 quick ones right at West Medford station.
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Re: ex-MARC Units Discussion

Postby ST214 » Thu Mar 31, 2011 12:17 am

The Fitchburg line is the winner whether you want to go with private or public crossings closest to North Station. At 0.9 is the BET crossing and at 2.7 is Park St. in Somerville.

There are 21 crossings on a run to South Acton alone. A run to Fitchburg has 40 crossings.



F-line to Dudley via Park wrote:
MBTA1052 wrote:Even I believe North Side has more RR Crossings than South but I could be wrong.


Quite a lot more. Southside has none whatsoever inside of 128 and none before any of the lines split. Northside has dozens in the inner 'burbs. NYNHH and B&A pursued crossing eliminations much harder than B&M ever did. Only the Lowell Line is close to total grade separation on the northside, with just the 2 quick ones right at West Medford station.
Hoping for a rebirth of the Screamer fleet.
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Re: ex-MARC Units Discussion

Postby AEM7AC920 » Thu Mar 31, 2011 6:13 am

And we are off to the races now (off topic). Anyhow I had 67 for the first time yesterday on a trip I must say she still has some life to her! I dnt know if the cabs were refinished on there last rebuild but are in a lot better shape vs the screamers considering they are close to the same age! Now only if they kept the frig in working order....
AMTRAK HAWK DETECTOR TRACK 1 NOOO DEFECTS OUT!
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Re: ex-MARC Units Discussion

Postby electricron » Thu Mar 31, 2011 10:07 am

Has anyone taken the time to measure the dbs of the various locomotives?
While you may be impressed with the sound from locomotives, I guarantee most neighbors near the tracks would prefer quieter trains.
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Re: ex-MARC Units Discussion

Postby F-line to Dudley via Park » Thu Mar 31, 2011 11:18 am

electricron wrote:Has anyone taken the time to measure the dbs of the various locomotives?
While you may be impressed with the sound from locomotives, I guarantee most neighbors near the tracks would prefer quieter trains.


Or pitch of the engine. db's have less to do with it seeming noisy to surrounding areas than if there's an annoying high-pitched whine or very low reverberation in the sound that carries over long distance. This is where the Screamers are noticeable vs. the other locos in the fleet. I can hear the Fitchburg line going through North Cambridge from my apt. on the other side of Danehy Park, some days much louder because of how sound travels in certain air pressures. The Screamers are a much more penetrating sound through the air from several blocks away than the Geeps or 2C's where I mainly just hear rumble of cars over the tracks and generic engine whoosh. Individual results may vary but I can often tell the difference.
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Re: ex-MARC Units Discussion

Postby MEC407 » Thu Mar 31, 2011 11:47 am

Decibel ratings would also vary greatly depending on when/how you measure them. For example, if you measure a screamer in Run 8 and measure a GP40WH-2 (or GP40MC) in Run 8, I would bet that the Geeps would register a higher decibel rating, because you'd be getting the noise from the 645 as well as the noise from the HEP engine, whereas the screamer doesn't have a separate HEP engine.

At a station stop, the screamer would clearly be much louder, due to the 645 being at full throttle, whereas the 645s in the Geeps would be at idle and you'd mostly be getting noise from the HEP engines.
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Re: ex-MARC Units Discussion

Postby GP40MC1118 » Fri Apr 01, 2011 7:48 pm

Extra Saturday to Worcester to pick up the 59 and deliver to BET.
Running out of Southampton St Yard 8AM with a trainset.
Should be under the CSX symbol of P930-2
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Re: ex-MARC Units Discussion

Postby diburning » Sat Apr 02, 2011 11:39 am

Photos! Headed east from CP45 at 11:18AM.

(the first photo is the best in my opinion). These are shots of it heading east. GP40MC 1121 came down with an Old Colony set.

http://photos.nerail.org/showpic/?2011040212383924011.jpg
http://photos.nerail.org/showpic/?2011040212355023933.jpg
http://photos.nerail.org/showpic/?2011040212341823894.jpg
http://photos.nerail.org/showpic/?2011040212300523829.jpg

And yes, those are ditch lights that you see on the 59. The gyralight is still there as well.
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Re: ex-MARC Units Discussion

Postby GP40MC1118 » Sat Apr 02, 2011 6:41 pm

The 59 goes out testing Sunday on the Northside with a 5 car set.
On duty 8AM BET...Will test on the Eastern Route and Lowell mainlines.

D
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Re: ex-MARC Units Discussion

Postby diburning » Sat Apr 02, 2011 8:32 pm

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Re: ex-MARC Units Discussion

Postby ck4049 » Sun Apr 03, 2011 6:06 am

I noticed the makes a strange whining noise when it accelerates. Also, the engine sounds alot different from the rest of the fleet!
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Re: ex-MARC Units Discussion

Postby Tom coughlin » Sun Apr 03, 2011 6:50 am

I see MARC 59 now has ditch lights. Did the P&W add those?
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Re: ex-MARC Units Discussion

Postby MBTA1052 » Sun Apr 03, 2011 7:06 am

Yepp they sure did I wonder if 67 will get sent back to P&W to get them installed??59 looks like a normal engine with Nose door open but I'm sure when the door gets close she will look odd!!;)
I love the smell of Diesel Fuel in the Morning!! ;)
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Re: ex-MARC Units Discussion

Postby LLPX2032 » Sun Apr 03, 2011 9:10 pm

ck4049... I noticed the same thing. These ex-MARC units (and also the #3247) sound like every other GP40/GP40-2 or SD40/SD40-2 I've ever heard (Conrail/CSX for example) with that high pitch turbo whine... yet, I wondered why the MBTA's F40's & GP40's don't sound the same. Are they using a different turbo than was the standard, or is it extra muffling in the exhaust? I know that they're all using the same 16-645E3, but I still have not a clue.
"People wait for trains, trains don't wait for people."
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Re: ex-MARC Units Discussion

Postby GP40MC1118 » Sun Apr 03, 2011 9:19 pm

Looks like the 59 passed the audition today.

Probably be on No.103 to Rockport Monday morning...

D
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