Eastern Railroad Discussion > Dash9 vs gevo observation

Never noticed before but saw a dash9 and a gevo end to end and was amazed at the difference in size between the two. Anyone else ever notice or know why the ES44 is so much larger?

Gary

Posted from iPhone

It is due to the horsepower-to-inch ratio.
Gonut

Larger in which direction? They're both 73'2" long... do you mean radiator size...? If so that's down to more complex cooling systems for reducing emissions in the GEVO.



Edited 1 time(s). Last edit at 12/29/18 15:57 by exhaustED.

Dash 9's, AC4400CW's, ES40DC's and ES44AC's are all the same length. ET44AH's are longer.

Russ

Length was same from what I could tell as well as height to walkway. It was mainly a huge difference at radiators. Is the cab same in size ?

Gary

Posted from iPhone

mully Wrote:
-------------------------------------------------------
> Length was same from what I could tell as well as
> height to walkway. It was mainly a huge
> difference at radiators. Is the cab same in size
> ?
>
> Gary
>
> Posted from iPhone

The cab is the same outside but smaller inside....opposite of a Tardis...but really it's just the AAR control stand takes up more floorspace than the dreadful desktop consoles. 

engineerinvirginia Wrote:
-------------------------------------------------------
> mully Wrote:
> --------------------------------------------------
> -----
> > Length was same from what I could tell as well
> as
> > height to walkway. It was mainly a huge
> > difference at radiators. Is the cab same in
> size
> > ?
> >
> > Gary
> >
> > Posted from iPhone
>
> The cab is the same outside but smaller
> inside....opposite of a Tardis...but really it's
> just the AAR control stand takes up more
> floorspace than the dreadful desktop consoles. 


Thanks for the insight

Gary

Pardon the stupid question: What defines a "GEVO", as opposed to a D8-40CW/D9-44CW/ES44DC/ES44AC/ET44AC-AH. To me, General Electric is General Electric. 

reel_smooth Wrote:
-------------------------------------------------------
> Pardon the stupid question: What defines a "GEVO",
> as opposed to a
> D8-40CW/D9-44CW/ES44DC/ES44AC/ET44AC-AH. To me,
> General Electric is General Electric. 

In that list the DASH-8s came first (1980s-ish), then came DASH-9s (mid-1990s), then came the GEVO models in the 2000s. A GEVO gets a 12 cylinder engine, not a 16 cylinder engine. Also exhaust emissions are reduced due to lots of cooling of combustion gases etc. So when a model starts with the ES or ET designation it's basically a tier 3 or tier 4 GEVO. GEVO stands for/is a marketing acronym for General Electric Evolution Series...

Wikipedia will give you more detail if needed.



Edited 2 time(s). Last edit at 12/30/18 05:23 by exhaustED.

Perfect - thank you!

Pleasure!

Gonut1 Wrote:
-------------------------------------------------------
> It is due to the horsepower-to-inch ratio.
> Gonut

Doesn’t the expanded bleed air widget also impact dimensional strength?
Dan

Posted from iPhone

dschlegel Wrote:
-------------------------------------------------------
> Gonut1 Wrote:
> --------------------------------------------------
> -----
> > It is due to the horsepower-to-inch ratio.
> > Gonut
>
> Doesn’t the expanded bleed air widget also
> impact dimensional strength?
> Dan

Yes it does, especially when the spunk-baubles are slightly out of kilter or have been super-fraggled by extended splaff-pumping.

exhaustED Wrote:
-------------------------------------------------------
> reel_smooth Wrote:
> --------------------------------------------------
> -----
> > Pardon the stupid question: What defines a
> "GEVO",
> > as opposed to a
> > D8-40CW/D9-44CW/ES44DC/ES44AC/ET44AC-AH. To me,
> > General Electric is General Electric. 
>
> In that list the DASH-8s came first (1980s-ish),
> then came DASH-9s (mid-1990s), then came the GEVO
> models in the 2000s. A GEVO gets a 12 cylinder
> engine, not a 16 cylinder engine. Also exhaust
> emissions are reduced due to lots of cooling of
> combustion gases etc. So when a model starts with
> the ES or ET designation it's basically a tier 3
> or tier 4 GEVO. GEVO stands for/is a marketing
> acronym for General Electric Evolution Series...
>
> Wikipedia will give you more detail if needed.


To add to what ED said, GE used the Cooper Bessemer designed 7FDL until the end of Dash-9 AC4400 production. The GEVO and the HDL (AC6000) were based on the Deutz 632. Completely different engines.

Posted from Android