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August 2003 - Page 24


Close-up of air tank and control valve. Note how brake chain goes through the Morton coupler platform. Ottawa, KS; July 2001.

Control valve mounted on S-shaped bracket and retaining valve. Note air release rod mounted below the ladder brace.

Prototype brake-end details. Note the Morton (round hole) roofwalk with no supports on the extension and overhanging roof. Hopper bay, discharge gates and center sill. Note the brake linkage through the cutouts in hopper. on the inside with the angle facing down. Trial fit the brake-end ladder assembly, trimming the brake beam if needed before securing in place. Two angles are mounted from the brake cylinder mounting pad toward the end ladder assembly on both sides of the vertical brake beam. Using a .100 styrene channel, cut to 3' 3" in length and then split the channel in half, creating two angles. Attach with both angles facing away from the vertical brake beam with the top of the angles level, ending just below the end ladder assembly. A trapezoidal-shaped bracket is mounted on the end ladder assembly for the brake chain to run through. Make two pieces from .015 x .100 strip styrene, cut 15" long and trim one corner of the narrow ends at a 30 angle. Use a single .040 x .040 strip cut 12" long and place in-between each of these trapezoidal pieces on the long side and glue together. Secure to the bottom of the end ladder assembly and to the front of the angles running from the brake-cylinder mounting pads. The bottom of the bracket needs to be flush with the bottom of the coupler pocket. Chain is used from the brake mechanism to the vertical brake beam. Using a small piece of .015 brass wire, make a small Ushaped hook and place through the last chain link. Place the hook around the vertical brake beam and attach with CA. Run the chain to the right side of the brake mechanism, running through the trapezoidal bracket and the coupler platform, trimming as necessary to let the chain hang loosely, and secure with CA. Place a .015 x .100 x 12" long piece of styrene strip on the bottom of the bracket extending to the coupler pocket. Then, make a small pad using .010 x .060 styrene cut 9" long. Place on top of these two angles, just behind the vertical brake beam towards the body. Now attach the brakewheel to the brake mechanism. Before installing the diagonal brace with the retainer valve bracket, remove the tall bracket for the control valve. After installing both diagonal braces, make a 12" long vertical brace from .020 x .080 styrene strip. This is mounted vertically on the inside angle of the diagonal brace and against the bottom of the control valve bracket. Install the retaining valve with air line, re-bending the air line as required. The air release rods run from the control valve to brackets underneath the ladder braces. Form two brackets from 010 x .030 styrene strip, each 9" long. Drill a #78 hole in the end of each bracket and mount on the back of the ladder braces below the middle set of rivets. The release rods are made from .008 wire; form a small loop at one end of each release rod by wrapping it around .025 styrene rod. Place each rod through the

Non-brake end. Note the tack board mounted below the numbers 7 and 9.

24 MODEL RAILROADING

AUGUST 2003

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