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General Category => Modellers At Work => Topic started by: Waldbahner on November 29, 2009, 08:04:28 AM



Title: A 1915 gas-mech Boxcab in 2"-scale
Post by: Waldbahner on November 29, 2009, 08:04:28 AM
Hello again,

Marc mentioned in the snwoplow topic, that I've also build a Boulder Valley Models style Boxcab. And here it is.

As I've started to 5" gauge modelrailroading some years ago, I build rolling stock from european industrial light railways in 2.5" scale. My first loco was a battery powered model of a Gmeinder Bdm 20/24 build from plywood. In 2007, I redesigned my railroad to an US logging railroad and also rebuild the diesel loco by adding wooden end sills and a wooden cab. But the model still looks more 2.5" scale and looks very big beside my 2"-scale rolling stock. The loco was also much to modern for my railroad.

After a long reserach on the internet, I came across with some pictures of early gasoline-mechanical boxcab locos. Those engines have been build in the eraly 1900 and wood match with the timetable of my railroad. An upgrowing logging railroad needs some new motive power... So they bought one brand new boxcab to support the steam locomotives on their daily work...

In late 2009, I started to dismantle my old Gmeinder locomotive down to the frame. The loco was build mostly out of plywood, so changes to the frame are very easy to do. The loco is powered by a 24V/250W motor and 2 batteries with 12V/42Ah each.

(http://www.gerds-modellbahn.de/BCRR/Fahrzeuge/Maggie/Maggie_7i.jpg) (http://www.gerds-modellbahn.de/BCRR/Fahrzeuge/Maggie/Maggie_7.jpg) (http://www.gerds-modellbahn.de/BCRR/Fahrzeuge/Boxcab/Maggie_3i.jpg) (http://www.gerds-modellbahn.de/BCRR/Fahrzeuge/Boxcab/Maggie_3.jpg)
Click on thumbs for large pictures.

Along the frame, I added two boards for the new floor. You can sse the difference between the new floor and the top edge of the old frame design. I also build new axle boxes to replace the 2.5"-scale journals. On the Gmeinder loco, the axles have an offset of 2cm to the front, so I cut 4cm off on the rear end to negotate the wheel arrangement.

(http://www.gerds-modellbahn.de/BCRR/Fahrzeuge/Boxcab/Boxcab_2i.jpg) (http://www.gerds-modellbahn.de/BCRR/Fahrzeuge/Boxcab/Boxcab_2.jpg) (http://www.gerds-modellbahn.de/BCRR/Fahrzeuge/Boxcab/Boxcab_3i.jpg) (http://www.gerds-modellbahn.de/BCRR/Fahrzeuge/Boxcab/Boxcab_3.jpg)
Click on thumbs for large pictures.

To complete the new chassic, I added endbeams with couplers and steps and painted the whole chassic in dark grey. The electric was installed and with the batteries on board I made first testruns. All is working fine so far. Now it's time to get the box build.

(http://www.gerds-modellbahn.de/BCRR/Fahrzeuge/Boxcab/Boxcab_5i.jpg) (http://www.gerds-modellbahn.de/BCRR/Fahrzeuge/Boxcab/Boxcab_5.jpg) (http://www.gerds-modellbahn.de/BCRR/Fahrzeuge/Boxcab/Boxcab_7i.jpg) (http://www.gerds-modellbahn.de/BCRR/Fahrzeuge/Boxcab/Boxcab_7.jpg)
Click on thumbs for large pictures.

I choose 10mm plywood for the box. Next I added stripes and 500 nails to make the rivets (only three sides are finished yet. Some more nails will follow). Over all there are 840 nails for rivets on that box (!)...
The door and window frames are cnc milled out of plywood. I also start with the head light. Window frames and parts of the door are also cnc milled. The hand rails are bend from 4mm round aluminium and set into the side walls with nuts and washers.

(http://www.gerds-modellbahn.de/BCRR/Fahrzeuge/Boxcab/Boxcab_10i.jpg) (http://www.gerds-modellbahn.de/BCRR/Fahrzeuge/Boxcab/Boxcab_10.jpg) (http://www.gerds-modellbahn.de/BCRR/Fahrzeuge/Boxcab/Boxcab_11i.jpg) (http://www.gerds-modellbahn.de/BCRR/Fahrzeuge/Boxcab/Boxcab_11.jpg)
Click on thumbs for large pictures.

The roof is removable to install the batteries. I made it from 4mm plywood, screwed to 4 ribs to get the curved roof. At last I spend some hours for painting until the loco was finally finished.

(http://www.gerds-modellbahn.de/BCRR/Fahrzeuge/Boxcab/Box_1i.jpg) (http://www.gerds-modellbahn.de/BCRR/Fahrzeuge/Boxcab/Box_1.jpg) (http://www.gerds-modellbahn.de/BCRR/Fahrzeuge/Boxcab/Box_2i.jpg) (http://www.gerds-modellbahn.de/BCRR/Fahrzeuge/Boxcab/Box_2.jpg)
Click on thumbs for large pictures.

Bye, Gerd


Title: Re: A 1915 gas-mech Boxcab in 2"-scale
Post by: Ken Hamilton on November 29, 2009, 08:49:31 AM
Wow....this big-scale stuff is wonderful.  Easy to see, too.
Great job, Gerd.  Very nicely done.  Thanks for the photos.


Title: Re: A 1915 gas-mech Boxcab in 2"-scale
Post by: Ray Dunakin on November 29, 2009, 11:01:00 AM
Looks great!


Title: Re: A 1915 gas-mech Boxcab in 2"-scale
Post by: finescalerr on November 29, 2009, 01:35:16 PM
That turned out well. -- Russ


Title: Re: A 1915 gas-mech Boxcab in 2"-scale
Post by: Brian Donovan on December 16, 2009, 10:53:59 AM
That is very cool and it looks an awful lot like my 7/8's scale boxcab critter -

(http://i113.photobucket.com/albums/n214/altterrain/7-8n2%20projects/7-8boxcab/7-8sboxcab1.jpg)

(http://i113.photobucket.com/albums/n214/altterrain/7-8n2%20projects/7-8boxcab/7-8sboxcab2.jpg)


-Brian


Title: Re: A 1915 gas-mech Boxcab in 2"-scale
Post by: Ray Dunakin on December 16, 2009, 09:33:36 PM
That's a nice one, Brian.