RC / DRONE ESC
FIBONACCI ADAPTIVE SWITCHING

// 1. Measure RPM from back-EMF zero crossings (existing ESC hardware)
F_elec  = RPM × pole_pairs ÷ 60

// 2. Find Fibonacci multiplier — zero residual guaranteed
FIB[]   = {1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377...}
FOR n = 0 TO 16:
  F_sw = F_elec × FIB[n]
  IF 8000 ≤ F_sw ≤ 40000: BREAK    // residual = 0 by definition

// 3. Amplitude tracks load — iron loss ∝ V² — biggest gain at hover/part throttle
V_opt   = V_full × √(load_fraction)

Coverage: band ratio 40000÷8000 = 5.0 > 2 (the largest step between adjacent Fibonacci terms) → a term always lands in band for F_elec from about 3 Hz to 40 kHz (17-term list, up to ×2584). Below about 3 Hz, such as a standing start, run fixed-frequency PWM until sync is possible.
Backward compat: Binary ESC sees normal bus. Fib ESC gets zero residual. Same wire. Same clock.