Oscillating engine
Oscillating engine. The cylinder has trunnions at the middle of its length working in fixed bearings, and the piston-rod is connected directly with the crank, and no guides are used.
Only the input is driven; every other part of this model moves by physics (MuJoCo), and its ratios are measured. Run it live, change its parameters, or switch the friction off to see the output stop.
- Modelled as
- The cylinder is 30 cm long and swings on trunnions at the middle of its length, in a bearing on the lower beam. The crank-shaft turns in a bearing on the upper beam, 40 cm above the trunnions. The crank is 10 cm long. The piston slides in the cylinder, and the piston-rod, 40 cm long, ends in an eye round the crank-pin. The pin is held in the eye by contact, with a few hundredths of a centimetre play. There are no guides: the cylinder, free on its trunnions, lines itself up with the rod. The crank is turned at 30 rev/min. It is the only driven part.
- Measured
- The piston runs the length of its 20 cm stroke, twice the crank's length, once each turn. The cylinder swings 0.253 radian each way, asin(10/40), following the crank-pin. The deepest contact is 0.01 mm.
- Notes
- Brown gives no sizes. They are taken roughly from the figure. Here the crank drives the piston, the reverse of a working engine, and no steam is simulated. The framing is shown as two plain beams.
Film (MP4) · Still (PNG) · Spec (YAML) · Model (MJCF)
