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Every tile below is the real thing, working right now — a verified exam question, a decoded METAR, the wind sim's ground track. No signup to try any of it. Every claim cited.

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Free sim · Ground reference

Wind makes or breaks the maneuver

This is the real sim, not a screenshot — set the wind, pick the maneuver, and watch groundspeed drive the bank the ACS grades you on.

Inputs
KT
°

Turns around a point at 95 knots airspeed, correcting for a 12 knot wind from 360 degrees. Groundspeed 83 to 107 knots. Up to 7 degrees of crab. Bank 24 to 37 degrees — shallowest upwind, steepest downwind.

Turns around a point — constant radius over the ground means the bank is steepest at the downwind point and shallowest upwind.

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Verified bank · 493 items · weather

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The troposphere extends from the surface to approximately:

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7 miles (36,000 ft) — varies by latitude. The troposphere averages about 7 miles (36,000 ft) at mid-latitudes, but ranges from ~5 miles at the poles to ~10 miles at the equator. It contains ~75% of atmospheric mass and ALL significant weather.FAA-H-8083-28B Chapter 4 · verified 2026-07-22
24 more, scored by area — the Readiness Test Free account: 2,074 verified questions, timed practice exam, missed-questions drill

Free tool · METAR decoder

Weather, in plain English

KCLT 301852Z 24008KT 10SM FEW250 32/19 A3002
WIND 240° @ 8 KTVIS 10 SMFEW 25,00032°C / DP 19°CALT 30.02 INHGVFR

Example report — paste any airport's raw METAR, or fetch it live.

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Free diagnostic

Where are you weak?

WXweak
REG
SYSsolid

Example — yours is computed from your answers. Nothing stored.

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What's aboard

493verified questions
11free sims & quizzes
7free pilot tools
828ACS elements mapped
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The guide · ACS-organized

14 chapters, 828 ACS elements, zero folklore

  1. Pilot Qualifications & Currency
  2. Aircraft Documents & Airworthiness
  3. Aircraft Systems
  4. Performance & Limitations
  5. Weather
  6. Airspace & Sectional Charts
  7. Navigation & Cross-Country Planning
  8. Operating Rules & Legal Responsibilities
  9. Human Factors & ADM
  10. Preflight, Airport & Postflight Operations
  11. Maneuvers Quick-Reference
  12. Emergency Operations
  13. Night Operations
  14. Appendices
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