f1-tyre-model

name	f1-tyre-model
description	F1 tyre compound constants, degradation model formulation, undercut logic, and pit-lane loss per circuit. Load when working on pit strategy, tyre deg, or undercut models.
when_to_use	When building or modifying f1_predict_pit_strategy, tyre degradation fits, or undercut calculations.

F1 Tyre Model Skill

Tyre compounds and static constants

Compound	base_lap_delta_s	degradation_rate	safe_window_laps	crossover_lap
SOFT	-0.8	0.08	15	12
MEDIUM	0.0	0.05	25	20
HARD	+0.6	0.03	40	35
INTER	+3.0	0.10	20	15
WET	+6.0	0.12	15	10

base_lap_delta_s: seconds vs MEDIUM reference. Negative = faster.

Pit lane loss (static seeds, Phase 3)

Default: 22s. Circuit-specific tuning is a Phase 3.1 follow-up.

Degradation model

Linear polyfit: lap_time = intercept + slope × tyre_age Outlier filter: drop laps > mean + 2σ (SC laps, in/out laps). Min 2 valid samples required; returns slope=0 if insufficient data.

Undercut formula

net_gain_per_lap = fresh_tyre_delta_s − (attacker_pace − target_pace) laps_to_clear = ceil((gap_to_target + pit_loss) / net_gain_per_lap) Viable if laps_to_clear ≤ 10. Marginal if 5 < laps_to_clear ≤ 10.