Post by Deleted on Nov 9, 2012 5:08:17 GMT -8
The CNW ordered from EMD specially equipped GP7 and GP9 locomotives to replace steam locomotives on the road's Chicago commuter trains. CNW's steam ear commuter coaches and combines didn't have axle driven generators and received their electricity for lighting from the locomotive. The steam engines had a special auxiliary generator for this purpose.
EMD's solution was to add a small generator to end of the long hood. This necessitated a cabinet be added to the long hood to access and service the generator. The 1920's built commuter coaches were also steam heated so these special GP7's and 9's had steam generators and roof mounted air reservoirs for increased water capacity.
The prototype.
I'm using an undecorated Proto 2000 GP7 with torpedo tubes.
The CNW GP7's had a single red signal light on the nose which was the same or similar to an F or E-unit back up light. I modified a DW F/E-unit rear back-up light casting and lowered the headlight using a DA part. The plug to the right of the headlight is the electrical connection for the passenger cars. I used a DA dynamic brake plug which is very similar to the prototype.
I modified the stock P2K steam generator venting to CNW appearance.
CNW specified adding an access door and a clothes locker to the engineer's side of the short hood. The door on the model is a Cannon part. I modeled the clothes locker which looks like a duct by shaping a piece of Evergreen styrene.
The foot board's represented by the P2K model are incorrect for the CNW units. I removed the factory cast on foot boards and added DA castings. The foot board themselves are Plano material I cut and tacked onto some brass bar stock which is glued to the DA parts.
Since these units have a steam generator, I added the steam line. I chopped Cal-Scale steam line castings and pinned the pieces together with 0.012" wire. My steam lines actually flex exactly like the prototype.
My GP7's are modeled as the units appeared in the 1960's to early 70's, this mean partially de-skirting the fuel/water tank. The water fill is a modified DW EMD fuel fill.
Now its time to tackle the rear squared off enclosure. Custom Finishes does or used to make this part in a brass casting. I bought a package.....in my humble opinion those casting are very crude and misshapen. The corners are so rounded they look like an F-unit nose and the details are rough.
I scratch built my enclosure using Cannon doors, roof material and some Evergreen styrene. I scribed the rear access panels on the part with a hobby knife. The Cannon doors were narrowed and reduced in height.
Ready for paint
EMD's solution was to add a small generator to end of the long hood. This necessitated a cabinet be added to the long hood to access and service the generator. The 1920's built commuter coaches were also steam heated so these special GP7's and 9's had steam generators and roof mounted air reservoirs for increased water capacity.
The prototype.
I'm using an undecorated Proto 2000 GP7 with torpedo tubes.
The CNW GP7's had a single red signal light on the nose which was the same or similar to an F or E-unit back up light. I modified a DW F/E-unit rear back-up light casting and lowered the headlight using a DA part. The plug to the right of the headlight is the electrical connection for the passenger cars. I used a DA dynamic brake plug which is very similar to the prototype.
I modified the stock P2K steam generator venting to CNW appearance.
CNW specified adding an access door and a clothes locker to the engineer's side of the short hood. The door on the model is a Cannon part. I modeled the clothes locker which looks like a duct by shaping a piece of Evergreen styrene.
The foot board's represented by the P2K model are incorrect for the CNW units. I removed the factory cast on foot boards and added DA castings. The foot board themselves are Plano material I cut and tacked onto some brass bar stock which is glued to the DA parts.
Since these units have a steam generator, I added the steam line. I chopped Cal-Scale steam line castings and pinned the pieces together with 0.012" wire. My steam lines actually flex exactly like the prototype.
My GP7's are modeled as the units appeared in the 1960's to early 70's, this mean partially de-skirting the fuel/water tank. The water fill is a modified DW EMD fuel fill.
Now its time to tackle the rear squared off enclosure. Custom Finishes does or used to make this part in a brass casting. I bought a package.....in my humble opinion those casting are very crude and misshapen. The corners are so rounded they look like an F-unit nose and the details are rough.
I scratch built my enclosure using Cannon doors, roof material and some Evergreen styrene. I scribed the rear access panels on the part with a hobby knife. The Cannon doors were narrowed and reduced in height.
Ready for paint
