The Feynman Sprinkler · Which Way Does a Sucking Sprinkler Turn?
unseel.com · submerge an S-armed sprinkler and pull water IN · which way does it spin?
Steady torque small
Spin toward water
Mode SUCKING · real
Water pulled in from all sides
Flow captured, down the stem
Inner jet round the bend (real)
Spin sense
Unseel.com · The Feynman Sprinkler