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Search results for: parallelograms
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... make the other end of your yard work, that line would have to be horizontal on your plan. I don't know if you could accommodate the shorter lengths of the yard roads. If you want longer roads then the line from the centre would have to be at an angle and that would mean that your fiddle yard would have to move at the same angle, and your loco head shunt section would also have to be at the same angle. Your main fiddle yard and your loco head shunt would them become forms of parallelograms. A problem with this setup is that you might require a bit more room to give full movement of the yard- i.e. the outermost fiddle yard track matches the innermost curve- since the movement of the fiddle yard to the left also moves it down and if the lower limit of the drawing is a brick wall, then there will be definite limit to the leftward travel. I worked out something similar many years ago but used a sector plate rather than a traverser on a curve. I wrote it up for ...
... once they are painted, I don't think I could tell the difference, so I don't think it's worth the extra cost. Keep up the good work Richard. posted: 5 Jul 2018 01:48 from: Andrew Barrowman Some chairs are a bit trickier than others. Chairs like the ubiquitous S1 are fairly straightforward because the jaws are normal to the base, but crossing chairs and some of the check chairs have jaws that are rotated from the normal. And they are not just simply rotated. The jaw casting forms a parallelogram with one axis aligned with the base and the other axis aligned with the rail. Here's one way to produce angled jaws. Starting with the base plate, the solid line represents the gauge face of the rail. 2983_041946_070000000.gif This is it in wire-frame plan view. Green lines are construction lines. 2983_041946_070000001.gif Now we drag the seat on to the base and snap it to the intersection of the center-line and the rail. 2983_041946_070000002.gif The seat is actually a block that can be used repeatedly in any model. ...
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