Shaft Power-Torque-Speed Calculator implementation

Binding contract

This record describes what an executable surface must bind and validate. It does not claim that a public calculator, package, or production route is deployed.

Record owner

Guth Instruments

Lifecycle

verified-clean

Evidence ID

t4-070

Effect

Computation or source lookup only

Input and validation requirements

A nonzero power input at zero rpm produces a zero denominator when torque is calculated, so the instrument must reject the input or report torque as undefined rather than returning a finite value.

Required corrections

No binding erratum is attached to this unique-name record. Implementers must still preserve the declared units, domain, and failure behavior.

Inspectable interface fixture

The sample below is evidence for interface and validation tests, not a production implementation.

{
  "inputs": {
    "T_Nm": 50,
    "N_rpm": 1800
  },
  "expected_outputs": {
    "omega_rad_per_s": 188.49555921538757,
    "P_W": 9424.77796076938,
    "T_Nm": 50
  },
  "working": "ω = 2πN/60 = 2π(1800)/60 = 60π = 188.49555921538757 rad/s. P = Tω = 50 × 188.49555921538757 = 9424.77796076938 W."
}

Other records

Sources and evidence

These pointers bind the page to evidence. They do not grant authority or collapse verification into deployment.

• VERIFIED_LEDGER.json
• evidence-tranche4/tranche4-results.json