M9 Procurement & Acceptance

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Re: M9 Procurement & Acceptance

Postby deandremouse » Thu Sep 14, 2017 8:24 pm

Head-end View wrote:One of the things that always annoyed me about the M-7's was their noisy door opening/closing machinery; that high-pitched jackscrew noise. Remember how quiet the double-leaf doors were on the M-1's and M-3's? And I've wondered if the doors on the M-9's will sound just as bad. :(

This week I happened to take a ride on Metro-North's New Haven Line's new Kawasaki M-8 cars and guess what? The single-leaf doors open and close quietly, unlike the M-7's. :-D

So I wonder if the M-9's will have quiet doors too. Ya' have to wonder if door machinery technology has improved in the years since the M-7's were built. Or if Kawasaki just builds a better product than Bombardier. Or if maybe MTA got enough complaints from the public about the M-7's noisy doors that they spec'd something better in the more recent cars. :wink:


The door apparatus on the M8 is made by Vapor (same in the M7) and so will be on the M9. Has nothing to do with the car manufacturers, just newer versions of the same door system. Design really hasn't changed much, what you're hearing is the door motor as it spins,
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Re: M9 Procurement & Acceptance

Postby Head-end View » Thu Sep 14, 2017 8:55 pm

Okay, so both Kawasaki and Bombardier buy from the same supplier. You're saying the technology has improved over the years then? But why were the doors on the M-1/M-3's so quiet in 1969/1985?
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Re: M9 Procurement & Acceptance

Postby BuddR32 » Wed Sep 27, 2017 3:08 am

Head-end View wrote:Okay, so both Kawasaki and Bombardier buy from the same supplier. You're saying the technology has improved over the years then? But why were the doors on the M-1/M-3's so quiet in 1969/1985?


Different mechanism altogether. The M1/M3 have doors mounted on simple roller bearing tracks, and side mounted operators that open and close the doors through an over-center lock type linkage

The M7 has an overhead mounted jackscrew with fine threads which spin at a high speed, hence the three stooges sound when they open and close.

The C3 has a similar setup, only the jackscrew thread is much broader.

I believe the M9 will have door systems made by Fuji
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Re: M9 Procurement & Acceptance

Postby Head-end View » Wed Sep 27, 2017 7:20 pm

Thanks! Let's hope Fuji knows how to build a quiet door system.
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Re: M9 Procurement & Acceptance

Postby DutchRailnut » Thu Sep 28, 2017 8:59 am

with the buy american concept, most components are US made including air conditioners, door operators, toilet systems brake components, etc etc.
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Re: M9 Procurement & Acceptance

Postby Head-end View » Thu Sep 28, 2017 4:09 pm

What's your point Dutch?
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Re: M9 Procurement & Acceptance

Postby DutchRailnut » Thu Sep 28, 2017 5:24 pm

that door operators will be vapor-wabtech.
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Re: M9 Procurement & Acceptance

Postby BuddR32 » Fri Sep 29, 2017 2:11 am

Doors are without a doubt Fuji. There is no buy america component on the M9, they're not federally funded. The M9A will be federally funded and a separate procurement with a buy america component
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Re: M9 Procurement & Acceptance

Postby Head-end View » Fri Sep 29, 2017 8:30 pm

BuddR32, I assume the M9A is for Metro-North? Why would theirs be Federally funded but not LIRR's M9's?
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Re: M9 Procurement & Acceptance

Postby andrewjw » Sat Sep 30, 2017 1:15 pm

Nope, M9 and M9A will both run on both railroads, the distinction this time around is the funding source.
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Re: M9 Procurement & Acceptance

Postby Head-end View » Sat Sep 30, 2017 8:12 pm

Well whover builds the friggin' door mechanisms, they'd better be quieter than on the M-7's 'cause those noisy doors are a disgrace to modern industry. :( And the M-8's have already proven that the industry can do better.
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Re: M9 Procurement & Acceptance

Postby DutchRailnut » Sat Sep 30, 2017 8:52 pm

If Conductors are in charge, why are they promoted to be Engineer???

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