There are three operations shown.
The solid black lines show the volume and RPM operation of the Diesel Motor.
The dotted blue line with large dashes shows the volume and RPM of the Turbine Whine.
The dotted red line with small dashes shows the volume of the Turbine Whoosh.
The yellow boxes indicate major events in the transition to Turbine Mode. The timing shown in each box indicates the number of seconds since
the transition command was sent to start Turbine Mode.
Note:
Turbine fire is a distinctive sound that sounds like a giant gas furnace being ignited.
Turbine Mode to Diesel Mode:
The prototype Gas Turbine locomotive was quite inefficient for yard operation at slow speeds. Once the
locomotive entered the yard, the turbine was shut down and the locomotive was moved about using the small auxiliary 250 hp Cummings
diesel. Under RTC, the model will be limited to 25 smph in Diesel Mode. To change from Turbine Mode to Diesel Mode:
Press the horn button four times to produce four short Horn Hoots in Neutral.
The locomotive will go through a complex Turbine Shut Down scenario as depicted in the graph below. The prototype diesel was used to power
the turbine blades and slow it down slowly to prevent heat damage. At the start of the transition to Diesel Mode, the Mars Light will change from
Steady to Off. When the transition scenario is completed, the Mars light will change from Off to steady on.
Notes: The following is a list of operational issues when changing between Diesel and Turbine Mode:
After the Turbine Whoosh starts reducing, the Diesel Motor will continue at maximum RPM for 36 seconds to model the Turbine cool
down process.
Cooling Fans and vent opening sounds only occur in Diesel Mode.
Mars Light, Air Pumps, Cooling Fans and other Neutral Sounds will be suspended during transition from Turbine Mode to Diesel Mode
or from Diesel Mode to Turbine Mode, like the prototype.
If the locomotive is in Turbine Mode or Diesel Mode when power is shut off, the locomotive will power up in the same Mode when
power is reapplied.
Gas Turbine Locomotive Q1R Operation Manual Version 3.0
7/26
14 March 2006
Turbine Shut Down
Time
1.
Air Pumps
off, Dim Mars
Light goes off.
2.
Diesel
Motor Starts. 3
sec.
5.
Diesel
Motor at
Max rpm.
7 sec.
14.
Air Pumps
On, Mars turns
on to Dim.
55 sec.
13.
Diesel
Motor at Idle.
48 sec.
12.
Diesel
RPM’s reduce.
43 sec.
8.
Turbine
Whine starts
ramp-down.
14 sec
7.
Turbine
Whoosh drops
down to Idle
Speed. 11 sec
3.
Diesel
Motor at
Idle 4 sec.
4.
Diesel Motor
starts ramp up.
5
sec.
6.
Turbine Whoosh decreases
in volume. 7 sec
9.
Turbine
Whoosh
volume
decreases.
17 sec.
10.
Turbine Whoosh
volume at zero.
21 sec.
11.
Turbine
Whine stops.
42 sec.
