IAIS M420R 801 is being built from a Kaslo M420R shell and a heavily modified Atlas U23B frame and mechanism. This photo shows the work that was done to remove a portion of the frame to allow the shell to fit. By: Joe Atkinson
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The portion of the U23B frame that fit inside the fuel tank was ground down to a length of 10'3" to accept the shorter M420R tank. By: Joe Atkinson
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The bottom was cut out of the Kaslo fuel tank to avoid having to grind the frame any further in order to get the tank to sit at the correct height. By: Joe Atkinson
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The corners of both ends of the frame were removed to allow the Kaslo shell to fit. I don't have access to a mill, so all frame modifications were done with a Dremel tool using reinforced cut-off disks. By: Joe Atkinson
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The AAR Type B sideframes shown on the model are from an Atlas C420. They're much improved over those found on the U23B (foreground) and snap right on. Complete sets are available direct from Atlas for something like $8. By: Joe Atkinson
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The inserts for the top of the fuel tank were cut back to fit over the U23B frame. By: Joe Atkinson
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This photo shows the Rail Master speaker installed under the radiator grill. By: Joe Atkinson
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Regarding the radiator louvers, I strayed from the Kaslo instructions, removing the dividers between each section of louvers. By: Joe Atkinson
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I tried to assemble the louvers as the instructions stated, but found the etched metal frames that were to be fabricated to hold the louvers inside the shell to be extremely difficult to work with. I ended up foregoing those frames altogether and simply ACCing the louver sets to the external frames shown in this photo. They're extremely delicate, so hopefully I can avoid breaking them during the painting, decaling and weathering process. By: Joe Atkinson
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To better match the prototype, I built an extended-height base for the exhaust stack and replaced the molded rib between the roof-top engine access doors with a styrene representation with individual supports. By: Joe Atkinson
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| 26 images in this album on 3 pages. |
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IAIS M420R 801 is being built from a Kaslo M420R shell and a heavily modified Atlas U23B frame and mechanism. This photo shows the work that was done to remove a portion of the frame to allow the shell to fit.
The portion of the U23B frame that fit inside the fuel tank was ground down to a length of 10'3" to accept the shorter M420R tank.
The bottom was cut out of the Kaslo fuel tank to avoid having to grind the frame any further in order to get the tank to sit at the correct height.
The corners of both ends of the frame were removed to allow the Kaslo shell to fit. I don't have access to a mill, so all frame modifications were done with a Dremel tool using reinforced cut-off disks.
Kaslo shell with pilots attached.
The AAR Type B sideframes shown on the model are from an Atlas C420. They're much improved over those found on the U23B (foreground) and snap right on. Complete sets are available direct from Atlas for something like $8.
The inserts for the top of the fuel tank were cut back to fit over the U23B frame.
This photo shows the Rail Master speaker installed under the radiator grill.
Regarding the radiator louvers, I strayed from the Kaslo instructions, removing the dividers between each section of louvers.
I tried to assemble the louvers as the instructions stated, but found the etched metal frames that were to be fabricated to hold the louvers inside the shell to be extremely difficult to work with. I ended up foregoing those frames altogether and simply ACCing the louver sets to the external frames shown in this photo. They're extremely delicate, so hopefully I can avoid breaking them during the painting, decaling and weathering process.
To better match the prototype, I built an extended-height base for the exhaust stack and replaced the molded rib between the roof-top engine access doors with a styrene representation with individual supports.
Conductor's side louvers.
All images on this site are copyrighted by their respective creators, and used with permission.
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