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-   -   Gmd-1 (https://forums.mylargescale.com/15-model-making/84354-gmd-1-a.html)

harvey 12-05-2017 12:16 PM

Gmd-1
 
I started building these three GMD-1's some time ago and they've been an on and off again project for number of months and while they are still a fill-in job I think I'm far enough along that I can share some of the progress. These will require the use of the A-1-A trucks that are in the other post under that title.
I have to confess I've made a number of mistakes along the way, some would say starting them was the biggest, but it's an evolution process for me anyway and hopefully the results turn out alright.
So here we go.....again.
This is a photo of the primary components.

http://forums.mylargescale.com/membe...2-gmd1-001.jpg

Long hood assembly.
http://forums.mylargescale.com/membe...0-gmd1-002.jpg

http://forums.mylargescale.com/membe...-gmd1-003a.jpg

More to come.
Cheers.

on30gn15 12-05-2017 01:17 PM

Quote:

Originally Posted by harvey (Post 1098202)
but it's an evolution process for me anyway ...

Add it to the adventures in model making category. And look at it this way, you will will have no regrets about not trying. :)

placitassteam 12-05-2017 01:50 PM

No model is a failure if you enjoy the process. Enjoy and keep posting.

harvey 12-09-2017 09:13 PM

Thanks for the encouragement.
These are a couple more photographs of the cab development. I also found that I didn't have enough clearance for the battery so I cut an opening in the sole plate and lowered it by 0.125". This together with the angle of the hood top (12 degrees) gave enough clearance.
http://forums.mylargescale.com/membe...-gmd1-005a.jpg

http://forums.mylargescale.com/membe...-gmd1-005b.jpg

http://forums.mylargescale.com/membe...6-gmd1-007.jpg

http://forums.mylargescale.com/membe...6-gmd1-010.jpg

This photo shows the initial sole plate layout and the cutout to allow additional clearance for the battery.

http://forums.mylargescale.com/membe...-gmd1-004b.jpg

More to come.
Cheers.

on30gn15 12-10-2017 07:55 AM

Looks like it has potential for sliding cab side windows.

harvey 12-10-2017 11:33 AM

(Looks like it has potential for sliding cab side windows.[/QUOTE])
Yes of course.
I think I've decided to eventually connect the two hoods and the cab permanently, this will give them some additional rigidity. At the moment there is some flexing in the frame when assembled and joining all three components together should eliminate some of that. I also plan to insert a brass strip behind the sides of the sole plates once the hand rails are positioned, this will provide some additional stiffness. Thinking ahead to wiring, I think having a single component body will help when doing that part.
I still have a lot of work to do on the cabs before I can get to joining it all together. Yesterday I went over to the railway museum to have a look in the cab of NAR#302 (a GMD1). Unfortunately when in CN ownership they changed the brake valves, so the hunt is on now to find an original layout photograph.
This shouldn't hold me up as I'll still have access through the cab roof when completed.
Cheers.

Jerry Barnes 12-10-2017 12:17 PM

Nice neat work, good to use a square. Should be a fun adventure. You seem to have a good plan to work from.

Scott 12-10-2017 06:10 PM

Very nice work Harvey, look forwards to the final result.

harvey 12-16-2017 06:06 PM

These couple of photo's show the fuel tank development. There are a few details yet to add but this allows me to better layout the underside.
http://forums.mylargescale.com/membe...3-gmd1-013.jpg

http://forums.mylargescale.com/membe...1-gmd1-014.jpg

Of course this is where the speaker will be located.
Note that the tubes have a vent drilled into them for assisting the glue to dry.
http://forums.mylargescale.com/membe...9-gmd1-015.jpg

http://forums.mylargescale.com/membe...-gmd1-015a.jpg

This photo shows the fuel tank in position together with the air tank. The air tank is not completed yet, but allows me to check the clearance for the truck body. Note the sight glass is located but no lens yet.
http://forums.mylargescale.com/membe...3-gmd1-017.jpg

More to come.
Cheers.

on30gn15 12-17-2017 12:44 AM

Quote:

Originally Posted by harvey (Post 1101073)
Note that the tubes have a vent drilled into them for assisting the glue to dry.

Ya know, that sounds like something worth remembering.


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