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| Re: Questions from the eager & curious (860626) | |||
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Re: Questions from the eager & curious |
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Posted by Terrapin Station on Wed Nov 18 17:45:24 2009, in response to Re: Questions from the eager & curious, posted by randyo on Wed Nov 18 16:25:59 2009. Actually, #2 is not entirely wrong but just a bit inaccurate.No, SelkirkTMO was 100% wrong with his answer (as is often the case). The answer is, in simple terms, EXACTLY as I stated it ("it goes faster because PATH allows it to go faster. NYCT subway trains could go faster too if they were allowed to..."). Nothing in SelkirkTMO's post was a relevant answer to the question being asked. The NYCTs doesn't have any artificial speed restriction on the entire system but just in certain areas where limited speed is required such as sharp curves and over switches and PATH has these also. See, you just showed how SelkirkTMO was completely wrong. The principal reason why NYCTA trains are usually slower than those on PATH is that there are few places on the NYCTS where trains can attain such high speeds before having to slow down for the next station stop. No, that's not the principle reason. And it's hardly any kind of reason. The real principle reason is that NYCT management have chosen to artificially restrict the speeds as compared to how fast the trains used to run, and also as compared to other subway/rapid transit systems. And how have they artificially restricted the speeds? By disabling field shunting on the cars that once had it, and by adding more and more timers, speed limits, and other such similar devices and rules. I don't believe that the distance across the flats enroute to the Rockaways is as long as the distance between JSQ and NWK so it would be highly unlikely that NYCTA trains would even be able to achieve their maximum speed potential there although they come close. I disagree 150%. On so many levels. 1. Long distances are not necessary to achieve high speeds - only strong and lasting acceleration rates are. And it helps to not be heading up a relatively steep grade. For proff, see PATCO, SEPTA's MFL and BSL, and many other subway systems. 2. It is about 3.7 miles from Howard Beach to Broad Channel. That's miles further than it would take to reach top speed if allowed to. For comparison, JSQ to Harrison is roughly 5 miles. And PATH reaches 60 MPH after only about 2.6 miles, and that includes the first 1.2 miles of the journey, which is flat, and then up and over a bridge. 3. Speeds between Howard Beach to Broad Channel are possibly limited because of posted speed limits or timers (if any exist), but they are definitely limited by lack of field shunting on the older cars, and for when R-160s run in revenue service down there, likely software-level restrictions on acceleration rates. ----- Take Pride,
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