MeowRailroad
CKRail
A train in AN emergency, or a train with emergency brakes on?
So you think you know about Trains? - Pt 2
- Thread starter ZecMurphy
- Start date
ZecMurphy
Community Assistant
Norman W. Muelner, for whom the Metra F40PHM-2 locomotive #200 is named after, was a BN Trainmaster who went to help a train in emergency in bad weather and was struck by another commuter train.last week's question said:
This weeks question:
What is the name of the private railcar that contains a fireplace, Turkish Marble Bathtub, wine cellar, and other Italian decor?
Trivia question submitted by the user Saturnr
Heads up, the Gold Coast does not have a wine cellar, or the Turkish bath. Also the GC 100 is in Victorian Decor, not Italian. Hope this helps. Glad to see such a quick stab at it! The GC 100 was retired by Beebe and Clegg due to having an open coal fireplace in an already outdated wooden car! Don't get me wrong, I love the Gold Coast as much as, if not more than the Virginia City with is old style. Glad somebody else notices her style and not just her younger sister the VC.
Saturnr
Saturnr
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ZecMurphy
Community Assistant
The roadname of the private railcar that contains a fireplace, Turkish Marble Bathtub, wine cellar, and other Italian decor is ‘Virginia City’. It was originally owned by the Southern Pacific, before authors Charles Clegg and Lucius Beebe remodeled it with the Venetian Decor in the 1950s.last week's question said:
This weeks question:
In model railroads, what does the acronym ‘P87’ stand for?
gregorygso
New member
This weeks question:
In model railroads, what does the acronym 'P87' stand for?
'P87' stands for 'Proto:87', which is a NMRA standard to address the fact most HO products are not at scale regarding the wheel sets and track. Most wheel flanges and track are larger (wider) than they should be related to scale. The idea is to model these more accurately while not reducing model functionality (i.e. derailments.)
Richard
Chelsea4884
Member
P87 Means...
I believe P87 means "true to the Prototype, precise 1:87 scale." I used to model in O gauge which is only nominally 1:48 scale. There was a subset called P48, true 1:48 scale, that used precise-to-scale rail and wheel cross sections. I find it hard to imagine a 1:87 true scale wheel staying on the rail -- the flange would be so tiny -- so I wonder what compromise, if any, the modeler must make?
I believe P87 means "true to the Prototype, precise 1:87 scale." I used to model in O gauge which is only nominally 1:48 scale. There was a subset called P48, true 1:48 scale, that used precise-to-scale rail and wheel cross sections. I find it hard to imagine a 1:87 true scale wheel staying on the rail -- the flange would be so tiny -- so I wonder what compromise, if any, the modeler must make?
The flanges aren't suppose to be what keeps the wheels on the rails. The "coning" of the wheel (the thread being inclined at 1 in 20 to the horizontal) combined with the effects of gravity (which resists the climbing the coning) is what is suppose to keep the wheelsets centered on the track. The flanges are just there to help guide the wheels through the points of turnouts. The image below compares the profiles of various HO wheel profiles.
As a side note: I rarely see anyone implementing (or mentioning) modeling the "coning" of wheels in Trainz. Why, i don't know, since doing so certainly doesn't add any additional polys...
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MeowRailroad
CKRail
Some of the wheels that I see appear to be concave, like some logging shay wheels.
Are these concave wheels from the real world or a modeled world?
ZecMurphy
Community Assistant
In model railroads, the acronym P87 stands for ‘Proto-87’, which is a fine scale standard for wheels and trackwork, giving very close to scale dimensions for rails/pointwork and wheels.last week's question said:
This weeks question:
Which type of train brake system does the term “suck and hope” refer to?
judahGrice
Retired Trainz User
UK/AUS Vacuum brakes. this was one of the issues addressed with Flying Scotsman's US visit, when it was refitted with air brakes, along with a cow-catcher, knuckle couplings, a headlight and few other required things for US rails.
MeowRailroad
CKRail
Why didn't it have a headlight to begin with?
In Britiain they use head code lamps. Small little white classification lamps set on the buffer. In North/South America a large always on headlight is mounted on top of the smokebox, centered in the middle or 6 or so inches above or below the center, or under the smokebox. The 4472 Flying Scottsman was fitted with a large smokebox top headlight when it came to America. Like in America we use white, green, or red flags/class lights, in the UK they use white lamps on the buffer and where they are located shows the type of train.
Saturnr
Saturnr
ZecMurphy
Community Assistant
The term ‘overarmer’ often refers to the ‘outside frame’ style of steam locomotive, where the wheels are placed between the frames, with cranks operating the coupling rods (and connecting rods, depending on design).last week's question said:
This weeks question:
What are the functions of the 3 valves on the water gauge glasses, on a steam locomotive’s boiler (note, 2 of these valves may be contained in a single valve on some locomotives)?
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