Fairbairn's bailing-scoop, for elevating water short distances
Fairbairn’s bailing-scoop, for elevating water short distances. The scoop is connected by pitman to end of a lever or of a beam of single-acting engine. Distance of lift may be altered by placing end of rod in notches shown in figure.
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
- Seen from in front, the trough's near side cut away, gravity on. The lever (standing for the engine's beam) is rocked 0.31 rad either way at 0.22 Hz, the only drive; its pitman, its end in one of the notches, raises and lowers the scoop, a wedge trough hinged on the left bank's edge, through about 40 deg. The scoop's water is a tank it carries, its weight on the trough so the lever lifts it: while the far lip is under the pond's surface the pond runs in over it until the level inside is the pond's; while the trough falls toward the pivot the water runs out at its open end into the channel on the bank, which runs off over its weir. A stream keeps the pond up.
- Measured
- Scoop swings -0.34..+0.37 rad (lever ±0.31); about 100 g filled per dip (to the pond's level) and poured into the channel each lift, 21 g/s mean. Motion gate pass.
- Notes
- The engine is not drawn; the lever stands for its beam. The water in the trough is lumped (a level surface in the trough's section), and its weight acts at one point of the trough. The channel's runoff is not drawn.
Film (MP4) · Still (PNG) · Spec (YAML) · Model (MJCF)
