Designing Inglenooks : The basic maths
Dear Splitrock,
Some basic maths:
Assume a 5:3:3 cannonical Inglenook
5 "units" (or cars, but lets work with units) for the long spur
+ 2 units for the main turnout toe <> clearance
(that's clearance, IE the point where 2 cars can stand side-by-side on adjacent tracks without sideswiping)
+ 3 units for cars on the tail track
+ 1 unit for the loco at the end of the tail track
= 5 + 2 + 3 + 1
= 11 units of linear length along the "longest route" which dictates the minimum benchwork
(assuming we're not using a cassette, sectorplate, or other subterfuge for the "tail track")
Assume 40' HO cars (and a 40' switcher like a SW7 thru 1500, or Alco S-series) @ 6" linear/car
= 66"
or 5' 6"
Redo for 50' HO cars (and a shorter GP15 or similar) @ 8" linear/car
= 88"
or 7' 4'
(blow it out to 8' for laughs)
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As per Carl Arendt's "how small can we shrink a 'nook and still have fun?" mission, lets redo for a 3:2:2 nook
Assume a 3:2:2 Inglenook
3 "units" (or cars, but lets work with units) for the long spur
+ 2 units for the main turnout toe <> clearance
(that's clearance, IE the point where 2 cars can stand side-by-side on adjacent tracks without sideswiping)
+ 2 units for cars on the tail track
+ 1 unit for the loco at the end of the tail track
= 3 + 2 + 2 + 1
= 8 units
Assume 40' HO cars (and a 40' switcher like a SW7 thru 1500, or Alco S-series) @ 6" linear/car
= 48"
or bang-on 4'
(grab yourself a 48x10 shelf at home depot,
slap down 3 lengths of PECO Code 83 "US Geometry" flextrack and 2x #6 turnouts,
and get operating!)
Redo for 50' HO cars (and a shorter GP15 or similar) @ 8" linear/car
= 64"
or 5' 4'
(blow it out to 6' for laughs)
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Consider the "Proto-nook"
As Iain Rice has been quoted:
"... a spur which holds 2.5 cars is no more use than a spur which holds 2 cars,
and significantly less useful than a spur which holds 3 at a pinch..."
Now, while we're not considering squeezing as many cars in each spur "just because we can",
this "...X # of cars, and a bit..." extra length of spur allows the inglenook "game" to hold methematically as far as car capacity goes,
while visually still allowing a good few inches of extra "spur length" which can work effectively to break up any feeling of "contrived spur length".
Furthur, by deploying Lance Mindheim-esque industry gates, fusees, derails,
(which all present themselves as possible animation modelling opportunities),
and "stop clear of grade crossing", conscious car-spot switching and other such operating rules,
(which despite the layout's micro size, still justify the deployment of "2-person ops crews"!?!?!?!!!)
the "that'll never feel like real switching" Inglenook arrangement "on a plank" can present (and operate) in either strict cannonical "game" mode, or in real-world "proto-nook" mode equally and easily as the whim and available crew dictates...
Hope this helps...
Happy Modelling,
Aim to Improve,
Prof Klyzlr
PS looks like Deem is using the Iain Rice-style "extra length" in his 5:3:3 nook spurs to allow a "mixed car set" of 40s and 50s....