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More Engines from Yesteryear |
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| Paul Krieg further wrote: I found two drawings I made in 1991 that show how I put an engine together probably about a year into my engine building experience. Below is the better of the two. | |
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Using this and the other drawing plus what I could remember I built an engine that closely resembles my earliest rotating design. After building this model I have a new perspective of "then and now". One thing the drawing does not show but I remember well was the need for a HUGE flywheel. It was necessary to put it over head of the engine horizontally using a crown gear. The flywheel was not geared up. Bevel gears, I remember, would strip too often for this. Many aspects of this design were actually pretty hard on the Legos. |
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| Originally the flywheel was built of girders on their side and put end to end using plates. This was not strong and my flywheels got so long I came up with the suspended type seen below. The cylinder is one of two from 8854. Notice the cap is yellow on yellow. I have never seen them this way since. I purposefully chose to rebuild this engine using one of these (my oldest double acting cylinders) to recreate the original. | |
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| The valve rod was an attempt at getting the right length. This is one of two designs for that rod I have record of. Originally (according to this drawing) I used a 12L girder. | |
| We had no internet or computer software that I could use so all was left as forgotten "doodles" on the back of school assignments. This engine runs rough. Adding a second cylinder was a later step in my development. | |