Airspeed Converter (IAS/CAS/TAS/EAS) 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

t6-065

Effect

Computation or source lookup only

Input and validation requirements

A temperature deviation of -288.15 K at sea level makes the absolute temperature exactly zero, causing the density denominator R*T to vanish. The converter should reject the input; any numeric output would be erroneous.

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": {
    "input_type": "CAS",
    "CAS_kt": 100,
    "altitude_m": 0,
    "temperature_deviation_K": 0,
    "model": "incompressible approximation",
    "assumptions": "IAS=CAS; sigma=1"
  },
  "expected_outputs": {
    "CAS_kt": 100,
    "EAS_kt": 100,
    "TAS_kt": 100,
    "density_ratio_sigma": 1
  },
  "working": "At sea level, sigma=rho/rho0=1. EAS=TAS*sqrt(sigma)=100*sqrt(1)=100 kt. TAS=CAS/sqrt(sigma)=100/sqrt(1)=100 kt. Therefore CAS=100 kt, EAS=100 kt, TAS=100 kt."
}

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-tranche6/tranche6-results.json