Green Line Type 9 Thread

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ceo
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Re: Green Line Type 9 Thread

Post by ceo »

It's a handsome vehicle (sure is better looking than those Type 7 hideosities), but the headlights look like two Mickey Mouse heads. And now you can't unsee that either. :-)

bostontrainguy
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Re: Green Line Type 9 Thread

Post by bostontrainguy »

Doesn't look at all like the original drawings they put out.
newgreenline.jpg
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MBTA DMA
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Re: Green Line Type 9 Thread

Post by MBTA DMA »

3910 has been accepted.

TurningOfTheWheel
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Re: Green Line Type 9 Thread

Post by TurningOfTheWheel »

I would anticipate we get something similar to those Type 9 concept drawings -- ie. standard, off-the-shelf LRVs -- when the Type 10s roll out. The Type 9s are basically a stopgap optimized Type 8.

diburning
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Re: Green Line Type 9 Thread

Post by diburning »

Here's a video by Tim Murphy (an MBTA inspector) showing the underside of a Type 9 (camera is in the gauge). I find it interesting how they were able to fit a "real" truck under the center section unlike the spring loaded stub axles on a Type 8.

https://www.facebook.com/TiminMurphy/vi ... 415820991/

The video is public, you do not need a facebook account to view it.

Rbts Stn
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Re: Green Line Type 9 Thread

Post by Rbts Stn »

bostontrainguy wrote:
Fri Feb 28, 2020 3:39 pm
Doesn't look at all like the original drawings they put out.

newgreenline.jpg
Just can't place that trackage . . .

bostontrainguy
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Re: Green Line Type 9 Thread

Post by bostontrainguy »

That's on the new Memorial Drive transitway.
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MBTA DMA
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Re: Green Line Type 9 Thread

Post by MBTA DMA »

3911 has been accepted.

Rbts Stn
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Re: Green Line Type 9 Thread

Post by Rbts Stn »

bostontrainguy wrote:
Tue Mar 10, 2020 7:58 am
That's on the new Memorial Drive transitway.
Ahhh. Leave town for a week and miss out on all the great new trackage plans!

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BandA
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Re: Green Line Type 9 Thread

Post by BandA »

diburning wrote:
Fri Mar 06, 2020 5:27 am
Here's a video by Tim Murphy (an MBTA inspector) showing the underside of a Type 9 (camera is in the gauge). I find it interesting how they were able to fit a "real" truck under the center section unlike the spring loaded stub axles on a Type 8.

https://www.facebook.com/TiminMurphy/vi ... 415820991/

The video is public, you do not need a facebook account to view it.
It's more rumbly than I expected, and seeing exposed gears was a surprise.

typesix
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Re: Green Line Type 9 Thread

Post by typesix »

Those "gears" could be disc brake rotors and the venting fins.

bostontrainguy
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Re: Green Line Type 9 Thread

Post by bostontrainguy »

That's a lot faster speed than they used to allow for crossover procedures (maybe 10 mph limit). I guess they have greatly improved the trackage. Also note the "frogless switch" or "lift turnout" frog.

Type 7 3684
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Re: Green Line Type 9 Thread

Post by Type 7 3684 »

3913 has been accepted

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Disney Guy
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Re: Green Line Type 9 Thread

Post by Disney Guy »

I could not see from the video but do Type 9s have real wheelsets (solid wheel-axle-wheel) in the center section? I take it that it would require smaller diameter wheels and/or a slope up in the interior floor going through the center section.

Not counting rotation in unison of opposite wheels, is there a mechanical difference between spring loaded single wheels under the center section and a truck side frame attached by springs but otherwise rigidly to the car underbody (the latter typical of an old fashioned single truck streetcar)?
Quick! Stop your bank account autopayments so you can decide where you want your unemployment check or stimulus payment to go first. (You might choose to set credit cards to minimum payment).

diburning
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Re: Green Line Type 9 Thread

Post by diburning »

I had assumed that they had full wheelsets (wheel-axle-wheel) under the center section, but after rewatching the video, I can tell that they are stub axles attached to a rigid low profile truck. I don't know how this compares to the setup on a Type 8 though, as I've never seen the underside of the center section of a Type 8.

I don't have an answer for your second question.

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