"Motor" container: Difference between revisions

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+{{ORP-top}}+{{ORP-bot}}+{{cont-Engine}}, clarify
 
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{{FUN-beg}}
The Motor container is a top-level [[config.txt file]] entry used by [[KIND Engine|Enginespec]] and [[KIND Steam-engine|Steam Enginespec]] assets.
{{ORP-top}}
The Motor container is a top-level [[config.txt file]] entry used to define gross physics performance factors for a powered vehicle defined within the Trainz game engine. The container is used by config.txt files for [[KIND Engine]] (internal combustion Enginespecs) and [[KIND Steam-engine]] (Steam Enginespecs, external combustion engines) containing vehicular assets, including drivable boats, planes and automobile based vehicles inside the virtual reality of a [[KIND Map|route]].


==Supported Tags==
==Supported Tags==
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  motor
  motor
  {
  {
     resistance                           1.7
     resistance                     1.7
     adhesion                             5.0
     adhesion                       5.0
     maxvoltage                    600.0
     maxvoltage                    600.0
     maxspeed                         33.3
     maxspeed                       33.3
     brakeratio                       55000
     brakeratio                     55000
     max-accel                       3500
     max-accel                     3500
     max-decel                       9000
     max-decel                     9000
     throttle-notches<big>**</big>                      8
     throttle-notches               8
     axle-count                       6
     axle-count                     6
     surface-area                     80.0
     surface-area                   80.0
     moving-friction-coefficient 0.03
     moving-friction-coefficient   0.03
     air-drag-coefficient       0.00017
     air-drag-coefficient           0.00017
     full-throttle-speed<big>*</big>        33.0
     full-throttle-speed           33.0
     driving-wheel-weight-ratio   1.0
     driving-wheel-weight-ratio     1.0
  }
  }
'''* ''' - Omit/delete as an illegal value in TRS2006 and  versions before.<!-- or where and whenever the software installed it. Someone add a build number of one or the other kind ---> {{Tech question}}
'''** - Omit/delete as an illegal value in versions before TRS2004.<!-- or where and whenever the software installed it. Someone add a build number of one or the other kind ---> {{Tech question}}


====resistance====
====resistance====
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==== throttle-notches ====
==== throttle-notches ====
:'''Type''': Integer, defined as the index of the last array-element ''with non-zero values'' in an array of arrays (container of sub-containers) &mdash;the dependent '''[["Throttle-power" container]]'''.
:Type: Integer
:* the contained arrays are the arrays-listing-paired-values (steps-of max speed and acceleration thrust force)&mdash; so the throttle-notches value is the last index# of an (nn+1)th element array listing elements made of other subcontainers (arrays of paired numbers which define points on a speed-power graph; and which has no fixed number of paired datum requirements; one engine spec might list 14, another 12 or 20).
:Description: Specifies the number of throttle notches in the cabin. By default, all (non-steam) locos have 8 throttle notches, but this may be overridden with this tag. Note that this has no impact on train power output, unless the engine also enables the [[KIND_Engine#throttle-power-extended-notch-range|throttle-power-extended-notch-range]] or [[KIND_Engine#dynamic-brake-extended-notch-range|dynamic-brake-extended-notch-range]] options, and provides the relevant data in the power output graphs.
:'''Description''': Can be viewed as the '''Number of "Power-is-applied" throttle-notches''' listed in the [["Throttle-power" container|"Throttle-power" arrays of paired values]] (container) with power applied&mdash;'''''not counting 'OFF'''''' or zero power applied.
# Not an total-elements or count-of-elements value, but the last legal index of the last element (nn) in an 1+nn-element array where the first element is idexed by 0 (zero).
## The first or Zeroth-indexed element has a value of zero, corresponding to Zero power applied, or Neutral.
## Value indicated must correspond to the number of NON-ZERO data arrays listed in the [["Throttle-power" container|throttle-power  container]] (a table of entries).
# Each table element takes one index number in an array, so eight throttle notches (Diesel, no dynamic brakes) has nine array elements corresponding to a correct '''throttle-notches''' value of 8 (eight)&mdash;No Power, and eight Power Applied steps.
# Dynamic brakes creates a doubling of elements and indexes, so a diesel with dynamic brakes will list 16 as the throttle-notches tag value, whilst '''the 'throttle-power' arrays''' will have ''18 total elements'' &mdash;in this case: two zero power states, dynamic brakes engaged or not (normal) engaged states.


====axle-count====
====axle-count====
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====surface-area====
====surface-area====
:Type: Decimal
:Type: Decimal
:Desc: frontal surface area (sq ft) of vehicle. Used in air [[#Resistance_calculations |resistance calculations]].
:Desc: Frontal surface area (sq ft) of vehicle. Used in air [[#Resistance_calculations |resistance calculations]].


====moving-friction-coefficient====
====moving-friction-coefficient====
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====full-throttle-speed====
====full-throttle-speed====
:Type: Decimal
:Type: Decimal
:Desc:
:Desc: Obsolete- no longer used. (Previously: maximum speed with DCC throttle at 100%)
Notes: TRS2006-SP0 reports this tag as an error in a "container-type 'motor'"


====driving-wheel-weight-ratio====
====driving-wheel-weight-ratio====
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These calculations occur according to Davis formula:
These calculations occur according to Davis formula:


R = (1.3?m + 29?axle-count) + moving-friction-coefficient?m?V + air-drag-coefficient?surface-area?V^2 + 20?m?G<br><br>
R = (1.3·m + 29·axle-count) + moving-friction-coefficient·m·V + air-drag-coefficient·surface-area·V^2 + 20·m·G<br><br>


R = total resistance in lb. including grade resistance<br>
R = total resistance in lb. including grade resistance<br>
Line 101: Line 90:
G = % grade (upgrade +, downgrade -)<br>
G = % grade (upgrade +, downgrade -)<br>


==Example motor container==
''TBD''


[[Category:Config Container|motor-container]]
[[Category:Config Container|motor-container]]
{{cont-Engine|motor-container}}
{{cont-Engine|motor-container}}
{{ORP-bot|motor-container}}<div>{{FUN-bot|motor-container}}
{{ORP-bot|motor-container}}<div>{{FUN-bot|motor-container}}

Latest revision as of 23:29, 30 September 2026

The Motor container is a top-level config.txt file entry used by Enginespec and Steam Enginespec assets.

Supported Tags

The Motor container supports the following tags. Each tag is show here with its default value. 

motor
{
    resistance                     1.7
    adhesion                       5.0
    maxvoltage                     600.0
    maxspeed                       33.3
    brakeratio                     55000
    max-accel                      3500
    max-decel                      9000
    throttle-notches               8
    axle-count                     6
    surface-area                   80.0
    moving-friction-coefficient    0.03
    air-drag-coefficient           0.00017
    full-throttle-speed            33.0
    driving-wheel-weight-ratio     1.0
}

resistance

Type: Decimal
Desc: Not used

adhesion

Type: Decimal
Desc: Not used

maxvoltage

Type: Decimal
Desc: Voltage to traction motors. This is used to scale the ammeter displayed in the cab. (Power is volts times amps - increasing the voltage means reducing the ammeter...)

maxspeed

Type: Decimal
Desc: Maximum speed in DCC mode.

brakeratio

Type: Decimal
Desc: Coefficient between the pressure in brake cylinder and the brake force.

max-accel

Type: Decimal
Desc: Accelerative force available in DCC mode. Note - this is a force, not a rate of acceleration. The rate of acceleration will depend on the mass of the train as well.

max-decel

Type: Decimal
Desc: Decelerative force available in DCC mode. Note - this is a force, not a rate of deceleration. The rate of deceleration will depend on the mass of the train as well.

throttle-notches

Type: Integer
Description: Specifies the number of throttle notches in the cabin. By default, all (non-steam) locos have 8 throttle notches, but this may be overridden with this tag. Note that this has no impact on train power output, unless the engine also enables the throttle-power-extended-notch-range or dynamic-brake-extended-notch-range options, and provides the relevant data in the power output graphs.

axle-count

Type: Integer
Desc: Number of axles on this vehicle. Used in rolling resistance calculations.

surface-area

Type: Decimal
Desc: Frontal surface area (sq ft) of vehicle. Used in air resistance calculations.

moving-friction-coefficient

Type: Decimal
Desc: Used in rolling resistance calculations.

air-drag-coefficient

Type: Decimal
Desc: Used in air resistance calculations.

full-throttle-speed

Type: Decimal
Desc: Obsolete- no longer used. (Previously: maximum speed with DCC throttle at 100%)

driving-wheel-weight-ratio

Type: Decimal
Desc: Ratio (between 0.0 and 1.0) of the weight of this vehicle bearing down on driven wheels. Used by steam locos only.

Resistance calculations

These calculations occur according to Davis formula:

R = (1.3·m + 29·axle-count) + moving-friction-coefficient·m·V + air-drag-coefficient·surface-area·V^2 + 20·m·G

R = total resistance in lb. including grade resistance
V = speed - mph
m = weight of the vehicle (tons)
G = % grade (upgrade +, downgrade -)

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