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by BigDumbDinosaur
Wed Dec 13, 2017 1:17 am
Forum: Riding Scale Railroading
Topic: The Viability of Solid-State Components for Signal Systems
Replies: 27
Views: 946

Re: The Viability of Solid-State Components for Signal Systems

So, on the turnout, diverging route to the siding, do you have a short section of detected track between the insulated joint at the signal and the turnout to detect that a train has passed the signal and thus drop the block to occupied? If not, does this mean that the train departing the siding is ...
by BigDumbDinosaur
Tue Dec 12, 2017 4:05 pm
Forum: Live Steam
Topic: New record in South Africa
Replies: 15
Views: 718

Re: New record in South Africa

Bill Yoder wrote:Another correction: Andries says the top speed was 23.4 km/h, which works out to almost 14.5 mph. That's really fast for 7 1/4"-gauge.

Any mention of how many times they had to rerail the loco?
by BigDumbDinosaur
Tue Dec 12, 2017 3:46 pm
Forum: Riding Scale Railroading
Topic: The Viability of Solid-State Components for Signal Systems
Replies: 27
Views: 946

Re: The Viability of Solid-State Components for Signal Systems

For turnouts I use the following placement of insulated joints: https://www.dropbox.com/s/rf0rtgn6wu4dild/Insulating%20A%20Switch.jpg?raw=1 This results in no 'dead spots' where a train is not detected. Back when we first undertook to signal our railroad, (occasionally-heated) discussion of what to...
by BigDumbDinosaur
Tue Dec 12, 2017 1:41 am
Forum: Build Log
Topic: EMD F7 in SCALE
Replies: 93
Views: 19103

Re: EMD F7 in SCALE

Andrew Pugh wrote:It's great to see you updating your build thread BDD.

Your F7 is looking great!

Thanks!
by BigDumbDinosaur
Mon Dec 11, 2017 9:37 pm
Forum: Riding Scale Railroading
Topic: Track Circuit Occupancy Detection
Replies: 9
Views: 482

Re: Track Circuit Occupancy Detection

jabsteam wrote:BigDumbDinosaur - Could you please post the URL for those Block Detection cards manufacturer?

This is the company website. You'd have to call about the ABS stuff. It's not advertised on the website.
by BigDumbDinosaur
Mon Dec 11, 2017 9:30 pm
Forum: Riding Scale Railroading
Topic: Signaling Beyond Simple Passing Sidings
Replies: 12
Views: 615

Re: Signaling Beyond Simple Passing Sidings

When you get into bi-directional running, I assert that ABS/APB signals are not sufficient without requiring someone to back up in the case of APB conflicts (e.g.: meets at intermediate signals - not desirable at a large meet). Further, managing traffic flow and preventing deadlocks requires using ...
by BigDumbDinosaur
Mon Dec 11, 2017 12:12 pm
Forum: Riding Scale Railroading
Topic: Semaphores explained?
Replies: 27
Views: 2244

Re: Semaphores explained?

Actually, two blocks are involved: a block governed by the signal and a "downline" block that follows. Plus the block the train currently occupies. No, Dianne. Only two blocks affect a given signal in a basic ABS using three aspect signals, "basic" meaning no APB or other compli...
by BigDumbDinosaur
Sun Dec 10, 2017 8:23 pm
Forum: General Discussion
Topic: Elf in the shop
Replies: 22
Views: 460

Re: Elf in the shop

SteveM wrote:You've heard of "Elf on the Shelf"?

Here's "Elf in the Shop".

Feel free to add your own pictures.

Steve

Not sure which would be more gruesome: getting your head sawed off or drilled out. :evil:
by BigDumbDinosaur
Sun Dec 10, 2017 8:21 pm
Forum: Build Log
Topic: EMD F7 in SCALE
Replies: 93
Views: 19103

EMD F7 in SCALE

by BigDumbDinosaur
Sun Dec 10, 2017 8:15 pm
Forum: Riding Scale Railroading
Topic: Semaphores explained?
Replies: 27
Views: 2244

Re: Semaphores explained?

DianneB wrote:A 3 position signalling system requires monitoring the three blocks beyond the signal. If it is a bi-directional track, that doubles the complexity.

Actually, two blocks are involved: a block governed by the signal and a "downline" block that follows.
by BigDumbDinosaur
Sun Dec 10, 2017 8:06 pm
Forum: General Discussion
Topic: Torque at different temperatures
Replies: 10
Views: 242

Re: Torque at different temperatures

As I was tightening something at about 25 degrees F this morning, it occurred to me that there may possibly be a change of a torque value if say a 25 degree head bolt 6" long goes into a 25 degree engine block as opposed to both pieces being at say 90 degrees. Is there a particular standard te...
by BigDumbDinosaur
Sun Dec 10, 2017 2:34 pm
Forum: General Discussion
Topic: Learned something about drilling today
Replies: 25
Views: 754

Re: Learned something about drilling today

This brings up a related thought. When center punching prior to center drilling, do you use a p***k punch alone or follow up with a center punch? These days, I exclusively use an optical center punch, unless working with thin sheet metal. The one I have creates a sufficiently deep mark that no addi...

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