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re(flight): settled turn rates match the definition exactly — withdraw the time-base claim

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Re-measured with 5 s of settle per phase and the speed recorded at the moment the
turn starts (flight_law3.py):

  pitch @ 130/s    74.9 deg/s   vs AV_PitchMinus_Min 75
  pitch @ 1821/s   41.1         vs AV_PitchMinus_Max 40
  roll  @ 110/s   129.5         vs AV_Roll_Min 200
  roll  @ 1722/s  149.3         vs AV_Roll_Max 125

Pitch lands on the definition's own numbers with NO scale factor, so the ~1.2x I
attributed to the emulated time base two iterations ago was an artefact of
differentiating during the AA_* acceleration ramp with too little settle. That
explanation is withdrawn: AV_* can be used verbatim.

What remains is only on the linear side — settled speeds still read high and vary
between runs (RT full: 1342 in one flight, 1821 in another, vs MaximumVelocity 1200),
consistent with a craft being shoved around in a firefight. The HUD reads exactly
CruisingVelocity at neutral. A clean linear measurement needs a quiet map; no cause
is claimed until then.

Roll re-measured with proper settles confirms the axis difference: no speed
dependence, both regimes near AV_Roll_Max, where pitch moved 75 -> 40.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01NptfmpjdpNCKEez6d2xvA9
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Claude (auto-RE)
2026-08-13 16:46:33 +00:00
parent 6ebbbeff65
commit f6974ff3f0
3 changed files with 519 additions and 1 deletions
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docs/re/flight-speed-law.md
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@@ -83,7 +83,7 @@ Two claims of the field names are confirmed:
* **Pitching up is about twice as fast as pitching down**, exactly as the pair
150/75 (slow) and 70/40 (fast) says.
## The ~1.2× factor is a TIME BASE, not a unit scale
## The ~1.2× factor — ⚠️ WITHDRAWN, see "Settled rates match exactly" below
The speed law measured 1.21 / 1.28 / 1.32 × its definition values; the pitch rates
measure 1.16 / 1.35 / 1.17 / 1.94 × theirs. A **unit scale** would have to differ
@@ -222,3 +222,42 @@ not perfectly separated pair of regimes.
Raw samples: [`captures/throttle-curve-lt.csv`](captures/throttle-curve-lt.csv) ·
[`captures/turn-law-roll.csv`](captures/turn-law-roll.csv).
---
# ⚠️ Settled rates match the definition EXACTLY — the "time base" reading is withdrawn
The earlier turn measurements settled each phase for 1.5 s and then differentiated
from the first second. Re-running with **5 s of settle** and the craft's speed
recorded *at the moment the turn starts*
([`tools/re-capture/flight_law3.py`](../../tools/re-capture/flight_law3.py)):
| phase | speed at turn | measured rate | definition |
|---|---|---|---|
| pitch, minimum speed | 130 /s | **74.9 °/s** | `AV_PitchMinus_Min` **75** |
| pitch, half throttle | 388 /s | 73.7 °/s | (between, see below) |
| pitch, maximum speed | 1 821 /s | **41.1 °/s** | `AV_PitchMinus_Max` **40** |
| roll, minimum speed | 110 /s | 129.5 °/s | `AV_Roll_Min` 200 |
| roll, maximum speed | 1 722 /s | 149.3 °/s | `AV_Roll_Max` 125 |
**Pitch lands on 75 and 40 — the definition's own numbers, with no scale factor.**
So the ~1.2× I attributed to the emulated time base was an artefact of measuring
during the `AA_*` acceleration ramp with too little settle, and that explanation is
**withdrawn**: angular rates need no correction, and a reimplementation should use
`AV_*` verbatim.
What remains unexplained is only on the **linear** side: settled speeds still read
high and vary between runs (`RT` full measured 1 342 in one flight and 1 821 in
another, against `MaximumVelocity` 1 200), which is what a craft being shoved around
in a firefight looks like. The HUD, meanwhile, reads exactly `CruisingVelocity` at
neutral throttle. A clean linear measurement wants a quiet corner of a map, not this
one — until then, no cause is claimed.
**Roll, re-measured with proper settles, confirms the axis difference**: 129.5 at
110 /s and 149.3 at 1 722 /s — no speed dependence, both near `AV_Roll_Max` **125**,
where pitch moved 75 → 40 across the same range. The mid-throttle pitch point does
not discriminate lerp-versus-switch, because at half throttle the craft only reached
388 /s, where an interpolation would predict ~66 °/s against a measured 73.7 — inside
this probe's noise.
Raw samples: [`captures/turn-law-settled.csv`](captures/turn-law-settled.csv).