Applegate Wednesday
¿ªÔÆÌåÓýMike, ? Are any UP engines in active duty configured as tunnel motors? ? Phil ? From: [email protected] [mailto:[email protected]] On Behalf Of Mike Tisdale via Groups.Io
Sent: Tuesday, January 7, 2020 11:25 PM To: [email protected]; Observation Car <observationcar@...> Subject: [ObservationCar] Applegate Wednesday ? On the warm summer morning of 8 July 2007, UP 5282 leads an eastbound manifest train with some refers at the front into Tunnel 28 in Applegate, California. We're at around 2000' elevation and the train will have to climb nearly 5000 more feet before it reaches Donner Summit ?
? ? Mike Tisdale ? |
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Phil, as far as I know, UP has retired or sold all of the Tunnel Motors it got from SP. GP15-1s have the same radiator arrangement, but were not really built for use in the mountains. Mike Tisdale
On Friday, January 10, 2020, 09:18:29 PM PST, Phil Burton <philip-b@...> wrote:
Mike, ? Are any UP engines in active duty configured as tunnel motors? ? Phil ? From: [email protected] [mailto:[email protected]] On Behalf Of Mike Tisdale via Groups.Io
Sent: Tuesday, January 7, 2020 11:25 PM To: [email protected]; Observation Car <observationcar@...> Subject: [ObservationCar] Applegate Wednesday ? On the warm summer morning of 8 July 2007, UP 5282 leads an eastbound manifest train with some refers at the front into Tunnel 28 in Applegate, California. We're at around 2000' elevation and the train will have to climb nearly 5000 more feet before it reaches Donner Summit ?
? ? Mike Tisdale ? |
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¿ªÔÆÌåÓýMike, ? So what has changed?? Certainly the tunnels are the same, that is, no big ventilation fans.? So are modern diesel engines less susceptible to the problems that caused SP to run tunnel motors?? I¡¯m not saying that you or anyone else on the list would know.? Seems like a good topic for ¡°Ask Trains.¡± ? Phil ? From: [email protected] [mailto:[email protected]] On Behalf Of Mike Tisdale via Groups.Io
Sent: Saturday, January 11, 2020 12:00 AM To: [email protected]; Observation Car <observationcar@...> Subject: Re: [ObservationCar] Applegate Wednesday ? ? Phil, as far as I know, UP has retired or sold all of the Tunnel Motors it got from SP. GP15-1s have the same radiator arrangement, but were not really built for use in the mountains. ? Mike Tisdale On Friday, January 10, 2020, 09:18:29 PM PST, Phil Burton <philip-b@...> wrote: ? ? Mike, ? Are any UP engines in active duty configured as tunnel motors? ? Phil ? From: [email protected] [mailto:[email protected]] On Behalf Of Mike Tisdale via Groups.Io ? On the warm summer morning of 8 July 2007, UP 5282 leads an eastbound manifest train with some refers at the front into Tunnel 28 in Applegate, California. We're at around 2000' elevation and the train will have to climb nearly 5000 more feet before it reaches Donner Summit ? ?
? ? Mike Tisdale ? ? |
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Excellent question Phil.? SP and Rio Grande were the only railroads to buy SD45T-2 and SD40T-2 locomotives (Rio Grande got 40s, only).? Subsequent SP and DRGW orders were for normal units, with Rio Grande getting SD50s and SP with GP60s and SD70Ms.? GE went from having lower? air intakes for their raidators on early U-series units to having radiators at similar height to EMDs on newer units.?? Newer units CAN have problems in tunnels..famously, the GE that was helping UP 844 and 3985 over Donner shut down in Summit Tunnel 41 in 1999 and forced the steam engineers to open their throttles, reminding the world of why SP went for cab forwards.?? Perhaps with modern control systems, units can be automatically reduced in power if they get too hot to try to prevent overheating.? Computer controls for locomotives have come a long way since 1972, when EMD introduced the -2 line. Mike Tisdale
On Saturday, January 11, 2020, 12:22:19 PM PST, Phil Burton <philip-b@...> wrote:
Mike, ? So what has changed?? Certainly the tunnels are the same, that is, no big ventilation fans.? So are modern diesel engines less susceptible to the problems that caused SP to run tunnel motors?? I¡¯m not saying that you or anyone else on the list would know.? Seems like a good topic for ¡°Ask Trains.¡± ? Phil ? From: [email protected] [mailto:[email protected]] On Behalf Of Mike Tisdale via Groups.Io
Sent: Saturday, January 11, 2020 12:00 AM To: [email protected]; Observation Car <observationcar@...> Subject: Re: [ObservationCar] Applegate Wednesday ? ? Phil, as far as I know, UP has retired or sold all of the Tunnel Motors it got from SP. GP15-1s have the same radiator arrangement, but were not really built for use in the mountains. ? Mike Tisdale On Friday, January 10, 2020, 09:18:29 PM PST, Phil Burton <philip-b@...> wrote: ? ? Mike, ? Are any UP engines in active duty configured as tunnel motors? ? Phil ? From: [email protected] [mailto:[email protected]] On Behalf Of Mike Tisdale via Groups.Io ? On the warm summer morning of 8 July 2007, UP 5282 leads an eastbound manifest train with some refers at the front into Tunnel 28 in Applegate, California. We're at around 2000' elevation and the train will have to climb nearly 5000 more feet before it reaches Donner Summit ? ?
? ? Mike Tisdale ? ? |
