Summer Pre-Solo Ground School Review

Pilot Responsibilities & Getting Started

• The role of the pilot-in-command (PIC) begins the moment training starts; expect to be held to professional standards of preparation, decision-making, and safety.
• Day-1 objective: Understand legal, procedural, and ethical obligations before first solo.
• Self-assessment: IMSAFE (Illness, Medication, Stress, Alcohol, Fatigue, Eating/Emotion) should be applied before every lesson.
• Early emphasis on building habits that will be evaluated on the Pre-Solo Knowledge Test and throughout one’s career.

Required Personal Documents & Materials

• Government-issued photo ID, FAA medical certificate, and student pilot certificate must be in your possession for every flight ($FAR\ 61.3$).
• Bring an individual logbook; flights for instruction or currency must be recorded (§$61.51$).
• Charting & airport references:
– Sectional aeronautical chart covering KDAN area.
– Chart Supplement (formerly A/FD) for detailed airport data.
– Both available in paper form or digitally via ForeFlight for iPad.
• Regulatory & reference texts: Federal Aviation Regulations (FAR/AIM), Pilot’s Handbook of Aeronautical Knowledge (PHAK), Airplane Flying Handbook (AFH), etc., all integrated within ForeFlight if you subscribe.
• Additional school-specific manuals: Averett Operations Manual and Archer Procedures Guide.

Training Structure: Flight & Ground

• Dual track each lesson:
– Flight session: Master aircraft control from basic maneuvers to traffic-pattern operations.
– Ground session: Cover knowledge areas required by §$61.87$ Presolo Knowledge Test—airspace rules, aircraft systems, regulations, and local procedures.
• Skill progression in flight sessions:
– Basic attitude flying → stalls → steep turns → emergency procedures → pattern work → landings.
• Knowledge progression on ground:
– Airspace & airport ops → aircraft systems → Federal & university regulations → weather & performance.

Basics of Flight

• Four aerodynamic forces determine aircraft motion.
• Control accomplished via primary (aileron, elevator, rudder) and secondary (flaps, trim) surfaces.
• Recognize distinct forms of drag and the concept of ground effect.
• Study multiple airspeeds (V-speeds) and their relation to aircraft performance.

Four Forces of Flight

• Lift opposes weight; thrust opposes drag.
• In level, unaccelerated flight: $Lift = Weight$ and $Thrust = Drag$.
• Any imbalance produces acceleration or a climb/descend tendency.

Aircraft Control Overview

• Pitch controlled by elevator; roll by ailerons; yaw by rudder.
• Coordinated flight keeps the ball centered and prevents side-loads & spin entry.
• Trim relieves control pressures—integral for precise flying.

Lift Principles

• Newton: Action (air deflected downward) = Reaction (wing pushed upward).
• Bernoulli: Faster airflow over curved upper surface → lower static pressure → differential pressure produces lift.
• Angle of attack (AOA) is primary variable; gross weight, load factor, and air density also influence lift.

Drag Taxonomy

• Induced drag: By-product of lift; inversely proportional to airspeed (greatest when slow, high AOA).
• Parasite drag: Skin friction, form, interference; increases with $V^2$, dominating at high speed.
• Wake turbulence is an induced-drag manifestation—stay above and upwind of preceding aircraft’s path on takeoff/landing.

Stalls

• Occur when critical AOA is exceeded—independent of airspeed, attitude, or aircraft configuration.
• Recovery steps (PARE for normal stalls):
– Push (lower nose to reduce AOA).
– Power (full).
– Cleanup (incrementally retract flaps).
– Establish climb.

Spins

• Aggravated, uncoordinated stall in which both wings are stalled (one more deeply).
• Immediate recognition vital; entry signs: stalled tone, yaw rate, rolling motion.
• Standard recovery (per AFH):
– Power idle.
– Ailerons neutral.
– Rudder full opposite to rotation.
– Elevator briskly forward to break stall.
– After rotation stops, neutralize rudder, ease out of dive, level wings, and recover to cruise.
• Prevention: Maintain coordination, observe stall cues, and respect AOA.

Airport Familiarization – Danville (KDAN)

• Class E (controlled to the surface only by weather minimums, no tower).
• Field elevation: $571\ \text{ft}\ MSL$.
• Runways:
– $02/20$: $5900 \times 100\ \text{ft}$—primary.
– $13/31$: $3910 \times 100\ \text{ft}$—crosswind option.
• Additional data: Lighting, frequency info, obstacles—all found in Chart Supplement or ForeFlight.

Taxi Operations

• Carry an airport diagram; study routes before departure.
• Keep head outside; stop completely before head-down tasks.
• Stay centered on taxiway; leave centerline only to avoid collision.
• Mandatory runway incursion avoidance: look, broadcast, and verify clearance before crossing or entering any runway.

Radio Communications Basics

• Three-part format: (1) Addressee, (2) Call-sign, (3) Message.
– Example: “Danville traffic, N2477S, downwind runway 20.”
• Brevity and clarity improve situational awareness.
• Monitor before transmitting; think—key—speak.

Traffic Pattern Operations

• Standard rectangular pattern, generally left turns unless published otherwise.
• Legs: upwind → crosswind → downwind → base → final.
• Uniformity enhances predictability and collision avoidance.

Radio Frequencies & Emergencies

• CTAF at KDAN: $123.05\ \text{MHz}$.
• Weather (AWOS-3): $128.125\ \text{MHz}$.
• Emergency guard: $121.5\ \text{MHz}$; transponder code $7700$ if in distress.
• Automatic ELT activates on impact; verify functional test during preflight per §$91.207$.

Airspace Classification

• Controlled: Classes $A, B, C, D, E$—ATC separation rules vary by class, especially for IFR vs VFR.
• Uncontrolled: Class $G$—see-and-avoid principle; pilots solely responsible for separation.
• Visual identifiers on sectional: thick blue rings (B), magenta (C, E begin @ surface), dashed lines (E surface), etc.

Federal Aviation Regulations – Overview

• FARs codified in $14\ CFR$.
• Key Parts for GA: $43$ (maintenance), $61$ (certification), $91$ (operation).
• Knowledge of structure allows quick reference in flight planning and while exercising PIC authority.

Part 43 – Maintenance

• Defines preventive vs required maintenance.
• §$43.3$ grants certificated pilots permission to perform preventive tasks (e.g., oil changes, tire replacement) listed in Appendix A, Subsection C.
• All maintenance must be recorded in aircraft logs.

Part 61 – Pilot Certification

• §$61.3$: PIC must carry ID, medical, pilot certificate.
• §$61.23$: Medical durations
– 1st-class: $12$ mo $(\leq40\ \text{yr})$ / $6$ mo (>40).
– 2nd-class: $12$ mo all ages.
– 3rd-class: $60$ mo $(\leq40)$ / $24$ mo (>40).
• §$61.51$: Logbook entries for training, currency, endorsements.
• §§$61.56/61.57$: Flight review every $24$ mo; $3$ TO/landings within $90$ days to carry passengers (night requires full-stop).
• §$61.89$: Student limitations—no passengers, no for-hire carriage, VFR criteria (>3\ \text{SM} day, >5\ \text{SM} night$)$, sight of surface required, must honor CFI limitations.

Part 91 – General Operating Rules

• §$91.3$: PIC has final authority; may deviate for emergencies—written report if requested.
• §$91.7$: Aircraft must be airworthy—PIC’s responsibility.
• §$91.13$: No careless/reckless operation endangering life or property.
• §$91.17$: Alcohol prohibitions—\text{BAC} < 0.04 and $8$-hour bottle-to-throttle. • §$91.103$ Preflight: – Local: runway lengths, performance data. – Nonlocal: weather, fuel, alternates, delays. • §$91.107$: Seat belts secured for taxi, takeoff, landing. • §$91.111$: Collision avoidance & formation flight restrictions. • §$91.113$: Right-of-way hierarchy—distress > balloons > gliders > airships > airplanes/rotorcraft.
• §$91.119$ Minimum altitudes:
– Congested: $1000\ \text{ft}$ above highest obstacle within $2000\ \text{ft}$.
– Other: $500\ \text{ft}$ AGL.
– Remote: $500\ \text{ft}$ from people/vessels/structures.
• §$91.151$: VFR fuel—30\ min day, 45\ min night reserve.
• §$91.203$: Required documents on board—AROW (Airworthiness, Registration, Operating Limitations/POH, W&B).
• §$91.215$: Transponder usage—inside/above B, within $30\ \text{NM}$ Mode C veil, C class, above $10,000\ \text{ft}$ MSL, etc.

Averett University Rules & Procedures

• Utilize the Operations Manual and Archer Procedures Guide—supplements FARs with institutional policies.
• Fuel minimums: $\geq2$ hrs aboard for local flights or full tanks for cross-country.
• Oil: $\geq4$ qt local, $\geq6$ qt extended ops.
• Specific checklists, callouts, and grading rubrics must be adhered to—non-compliance affects dispatch and solo privileges.

Piper Archer Aircraft Familiarization

• Model: $PA28\text{–}181$.
• Engine: Lycoming $O\text{–}360\text{–}A4M$ (carb) or $IO\text{–}360\text{–}A4M$ (fuel-injected).
• $4$ cylinders, $180\ \text{HP}$ at $2700\ \text{RPM}$, dual magnetos.
• Max gross weight: $2558\ \text{lb}$; max takeoff $2550\ \text{lb}$; baggage limit $200\ \text{lb}$.
• Fuel: $50\ \text{gal}$ total, $48\ \text{gal}$ usable; $100/100LL$ avgas; typical burn $9.5\ \text{gph}$.
• Oil capacity $8\ \text{qt}$; minimum $2\ \text{qt}$.

Key Performance Numbers (V-Speeds)

• $V<em>y$ (best rate): $76\ \text{KT}$. • $V</em>x$ (best angle): $64\ \text{KT}$.
• $V<em>{SO}$ (stall landing config): $45\ \text{KT}$. • $V</em>{S1}$ (stall clean): $50\ \text{KT}$.
• $V<em>{NE}$: $154\ \text{KT}$. • $V</em>{NO}$ (max structural cruise): $125\ \text{KT}$.
• $V<em>A$ (maneuvering): $89\text{–}113\ \text{KT}$ (varies with weight). • $V</em>{FE}$ (flaps): $102\ \text{KT}$.
• Best glide: $76\ \text{KT}$.
• Max demonstrated crosswind: $17\ \text{KT}$.
• Flap settings: $0^\circ,\ 10^\circ,\ 25^\circ,\ 40^\circ$.

Carburetor vs Fuel Injection

• Carburetor: Mixes fuel/air via Venturi; susceptible to carb icing—apply carb heat.
• Fuel injection: Fuel metered directly to cylinders—better distribution, no carb ice, but potential vapor lock; requires fuel-pump priming for start.

Avionics & Instrument Systems

• Pitot-static: Drives airspeed indicator, altimeter, VSI; verify pitot heat in icing.
• Analog vs ADC: Traditional gauges vs digital air-data computer.
• Attitude sources: Gyroscopic vacuum-driven vs modern AHRS (solid-state).
• GPS: Triangulates satellite signals to compute $3D$ position; WAAS improves vertical accuracy—integral for situational awareness and georeferenced charts.

Weather Information Sources

• METAR: Hourly surface observation; coded report with winds, visibility, ceiling, temp/dewpoint, altimeter.
• PIREP: Pilot-reported conditions—icing, turbulence, cloud tops.
• Surface analysis chart: Synoptic overview—pressure patterns, fronts.
• Access through ForeFlight, AviationWeather.gov, or FSS briefers.

Weather Forecasting Tools

• TAF: $24\text{–}30\ \text{hr}$ aerodrome forecast; issued $6\ \text{hr}$ intervals.
• Prog charts: $12\text{–}48\ \text{hr}$ outlooks displaying fronts, pressure systems, and precipitation.
• Evaluate trends: Compare METARs & TAFs to anticipate changes along route.

Hazardous Weather Products

• AIRMET (Sierra, Tango, Zulu): IFR/mountain obscuration, moderate turbulence, moderate icing, surface winds >30\ \text{KT}.
• SIGMET: Severe icing/turbulence, dust/sand storms $\gt 3\ \text{SM}$ visibility reduction, volcanic ash.
• Convective SIGMET: Thunderstorm criteria—line $\gt 60\ \text{mi}$, embedded, hail $\geq 0.75\ \text{in}$, tornadoes.
• Thunderstorm hazards: Wind shear, hail, icing, lightning, microbursts, severe turbulence.
• Icing consequences: Wing contour change, drag rise, weight increase → requires higher airspeed and longer landing rollout.
• Ice types:
– Clear: Glossy, transparent, heavy.
– Rime: Opaque, brittle, lighter.
– Frost: Crystalline layer—must be removed pre-flight.

Atmospheric Mechanics & Pressure Systems

• Weather driven by uneven solar heating; diurnal cycle creates pressure gradients.
• Surface winds flow from high → low pressure but deflect due to Coriolis.
• Low pressure: Counter-clockwise rotation (NH) → rising air → clouds/precip.
• High pressure: Clockwise rotation (NH) → sinking air → clear skies.
• Understanding these patterns aids en-route decision-making and fuel/altitude planning.

Pilot Responsibilities & Getting Started

• The role of the pilot-in-command (PIC) begins the moment training starts; expect to be held to professional standards of preparation, decision-making, and safety.
• Day-1 objective: Understand legal, procedural, and ethical obligations before first solo.
• Self-assessment: IMSAFE (Illness, Medication, Stress, Alcohol, Fatigue, Eating/Emotion) should be applied before every lesson.
• Early emphasis on building habits that will be evaluated on the Pre-Solo Knowledge Test and throughout one’s career.

Required Personal Documents & Materials

• Government-issued photo ID, Federal Aviation Administration (FAA) medical certificate, and student pilot certificate must be in your possession for every flight ($FAR\ 61.3$).
• Bring an individual logbook; flights for instruction or currency must be recorded (§$61.51$).
• Charting & airport references:
– Sectional aeronautical chart covering KDAN area.
– Chart Supplement (formerly Airport/Facility Directory - A/FD) for detailed airport data.
– Both available in paper form or digitally via ForeFlight for iPad.
• Regulatory & reference texts: Federal Aviation Regulations/Aeronautical Information Manual (FAR/AIM), Pilot’s Handbook of Aeronautical Knowledge (PHAK), Airplane Flying Handbook (AFH), etc., all integrated within ForeFlight if you subscribe.
• Additional school-specific manuals: Averett Operations Manual and Archer Procedures Guide.

Training Structure: Flight & Ground

• Dual track each lesson:
– Flight session: Master aircraft control from basic maneuvers to traffic-pattern operations.
– Ground session: Cover knowledge areas required by §$61.87$ Presolo Knowledge Test—airspace rules, aircraft systems, regulations, and local procedures.
• Skill progression in flight sessions:
– Basic attitude flying → stalls → steep turns → emergency procedures → pattern work → landings.
• Knowledge progression on ground:
– Airspace & airport ops → aircraft systems → Federal & university regulations → weather & performance.

Basics of Flight

• Four aerodynamic forces determine aircraft motion.
• Control accomplished via primary (aileron, elevator, rudder) and secondary (flaps, trim) surfaces.
• Recognize distinct forms of drag and the concept of ground effect.
• Study multiple airspeeds (V-speeds) and their relation to aircraft performance.

Four Forces of Flight

• Lift opposes weight; thrust opposes drag.
• In level, unaccelerated flight: $Lift = Weight$ and $Thrust = Drag$.
• Any imbalance produces acceleration or a climb/descend tendency.

Aircraft Control Overview

• Pitch controlled by elevator; roll by ailerons; yaw by rudder.
• Coordinated flight keeps the ball centered and prevents side-loads & spin entry.
• Trim relieves control pressures—integral for precise flying.

Lift Principles

• Newton: Action (air deflected downward) = Reaction (wing pushed upward).
• Bernoulli: Faster airflow over curved upper surface → lower static pressure → differential pressure produces lift.
• Angle of attack (AOA) is primary variable; gross weight, load factor, and air density also influence lift.

Drag Taxonomy

• Induced drag: By-product of lift; inversely proportional to airspeed (greatest when slow, high AOA).
• Parasite drag: Skin friction, form, interference; increases with $V^2$, dominating at high speed.
• Wake turbulence is an induced-drag manifestation—stay above and upwind of preceding aircraft’s path on takeoff/landing.

Stalls

• Occur when critical AOA is exceeded—independent of airspeed, attitude, or aircraft configuration.
• Recovery steps for normal stalls:
– Push (lower nose to reduce AOA).
– Power (full).
– Cleanup (incrementally retract flaps).
– Establish climb.

Spins

• Aggravated, uncoordinated stall in which both wings are stalled (one more deeply).
• Immediate recognition vital; entry signs: stalled tone, yaw rate, rolling motion.
• Standard recovery (PARE per AFH - Power idle, Ailerons neutral, Rudder full opposite to rotation, Elevator briskly forward to break stall):
– Power idle.
– Ailerons neutral.
– Rudder full opposite to rotation.
– Elevator briskly forward to break stall.
– After rotation stops, neutralize rudder, ease out of dive, level wings, and recover to cruise.
• Prevention: Maintain coordination, observe stall cues, and respect AOA.

Airport Familiarization – Danville (KDAN)

• Class E (controlled to the surface only by weather minimums, no tower).
• Field elevation: $571\ \text{ft}\ MSL$ (Mean Sea Level).
• Runways:
– $02/20$: $5900 \times 100\ \text{ft}$—primary.
– $13/31$: $3910 \times 100\ \text{ft}$—crosswind option.
• Additional data: Lighting, frequency info, obstacles—all found in Chart Supplement or ForeFlight.

Taxi Operations

• Carry an airport diagram; study routes before departure.
• Keep head outside; stop completely before head-down tasks.
• Stay centered on taxiway; leave centerline only to avoid collision.
• Mandatory runway incursion avoidance: look, broadcast, and verify clearance before crossing or entering any runway.

Radio Communications Basics

• Three-part format: (1) Addressee, (2) Call-sign, (3) Message.
– Example: “Danville traffic, N2477S, downwind runway 20.”
• Brevity and clarity improve situational awareness.
• Monitor before transmitting; think—key—speak.

Traffic Pattern Operations

• Standard rectangular pattern, generally left turns unless published otherwise.
• Legs: upwind → crosswind → downwind → base → final.
• Uniformity enhances predictability and collision avoidance.

Radio Frequencies & Emergencies

• Common Traffic Advisory Frequency (CTAF) at KDAN: $123.05\ \text{MHz}$.
• Weather (Automated Weather Observing System - AWOS)-3: $128.125\ \text{MHz}$.
• Emergency guard: 121.5\ \text{MHz}$; transponder code 7700$if in distress.<br>• Automatic Emergency Locator Transmitter (ELT) activates on impact; verify functional test during preflight per §$91.207$).</p><h4 collapsed="false" seolevelmigrated="true">Airspace Classification</h4><p>• Controlled: Classes$A, B, C, D, E$—Air Traffic Control (ATC) separation rules vary by class, especially for Instrument Flight Rules (IFR) vs Visual Flight Rules (VFR).<br>• Uncontrolled: Class$G$—see-and-avoid principle; pilots solely responsible for separation.<br>• Visual identifiers on sectional: thick blue rings (B), magenta (C, E begin @ surface), dashed lines (E surface), etc.</p><h4 collapsed="false" seolevelmigrated="true">Federal Aviation Regulations – Overview</h4><p>• FARs (Federal Aviation Regulations) codified in$14\ CFR$(Code of Federal Regulations).<br>• Key Parts for General Aviation (GA):$43$(maintenance),$61$(certification),$91$(operation).<br>• Knowledge of structure allows quick reference in flight planning and while exercising PIC authority.</p><h4 collapsed="false" seolevelmigrated="true">Part 43 – Maintenance</h4><p>• Defines preventive vs required maintenance.<br>• §$43.3$grants certificated pilots permission to perform preventive tasks (e.g., oil changes, tire replacement) listed in Appendix A, Subsection C.<br>• All maintenance must be recorded in aircraft logs.</p><h4 collapsed="false" seolevelmigrated="true">Part 61 – Pilot Certification</h4><p>• §$61.3$: PIC must carry ID, medical, pilot certificate.<br>• §$61.23$: Medical durations<br>– 1st-class:$12$mo$(\leq40\ \text{yr})$/$6$mo$(>40)$.<br>– 2nd-class:$12$mo all ages.<br>– 3rd-class:$60$mo$(\leq40)$/$24$mo$(>40)$.<br>• §$61.51$: Logbook entries for training, currency, endorsements.<br>• §§$61.56/61.57$: Flight review every$24$mo;$3$takeoffs (TO)/landings within$90$days to carry passengers (night requires full-stop).<br>• §$61.89$: Student limitations—no passengers, no for-hire carriage, VFR (Visual Flight Rules) criteria$(>3\ \text{SM}$day,$>5\ \text{SM}$night$)$, sight of surface required, must honor Certified Flight Instructor (CFI) limitations.</p><h4 collapsed="false" seolevelmigrated="true">Part 91 – General Operating Rules</h4><p>• §$91.3$: PIC has final authority; may deviate for emergencies—written report if requested.<br>• §$91.7$: Aircraft must be airworthy—PIC’s responsibility.<br>• §$91.13$: No careless/reckless operation endangering life or property.<br>• §$91.17$: Alcohol prohibitions—Blood Alcohol Content (BAC)$…

Averett University Rules & Procedures

• Utilize the Operations Manual and Archer Procedures Guide—supplements FARs with institutional policies.
• Fuel minimums: \geq2$hrs aboard for local flights or full tanks for cross-country.<br>• Oil:$\geq4$qt local,$\geq6$qt extended ops.<br>• Specific checklists, callouts, and grading rubrics must be adhered to—non-compliance affects dispatch and solo privileges.</p><h4 collapsed="false" seolevelmigrated="true">Piper Archer Aircraft Familiarization</h4><p>• Model:$PA28\text{\unicode{x2013}}181$.<br>• Engine: Lycoming$O\text{\unicode{x2013}}360\text{\unicode{x2013}}A4M$(carburetor) or$IO\text{\unicode{x2013}}360\text{\unicode{x2013}}A4M$(fuel-injected).<br>•$4$cylinders,$180\ \text{HP}$(Horsepower) at$2700\ \text{RPM}$(Revolutions Per Minute), dual magnetos.<br>• Max gross weight:$2558\ \text{lb}$; max takeoff$2550\ \text{lb}$; baggage limit$200\ \text{lb}$.<br>• Fuel:$50\ \text{gal}$total,$48\ \text{gal}$usable;$100/100LL$avgas; typical burn$9.5\ \text{gph}$(gallons per hour).<br>• Oil capacity$8\ \text{qt}$(quarts); minimum$2\ \text{qt}$.</p><h4 collapsed="false" seolevelmigrated="true">Key Performance Numbers (V-Speeds)</h4><p>•$V*y$(best rate):$76\ \text{KT}$(Knots).<br>•$V*x$(best angle):$64\ \text{KT}$.<br>•$V*{SO}$(stall landing config):$45\ \text{KT}$.<br>•$V*{S1}$(stall clean):$50\ \text{KT}$.<br>•$V*{NE}$:$154\ \text{KT}$.<br>•$V*{NO}$(max structural cruise):$125\ \text{KT}$.<br>•$V*A$(maneuvering):$89\text{\unicode{x2013}}113\ \text{KT}$(varies with weight).<br>•$V*{FE}$(flaps):$102\ \text{KT}$.<br>• Best glide:$76\ \text{KT}$.<br>• Max demonstrated crosswind:$17\ \text{KT}$.<br>• Flap settings:$0^\circ,\ 10^\circ,\ 25^\circ,\ 40^\circ.

Carburetor vs Fuel Injection

• Carburetor: Mixes fuel/air via Venturi; susceptible to carb icing—apply carb heat.
• Fuel injection: Fuel metered directly to cylinders—better distribution, no carb ice, but potential vapor lock; requires fuel-pump priming for start.

Avionics & Instrument Systems

• Pitot-static: Drives airspeed indicator, altimeter, VSI (Vertical Speed Indicator); verify pitot heat in icing.
• Analog vs ADC (Air Data Computer): Traditional gauges vs digital air-data computer.
• Attitude sources: Gyroscopic vacuum-driven vs modern AHRS (Attitude and Heading Reference System) (solid-state).
• GPS (Global Positioning System): Triangulates satellite signals to compute 3D$position; WAAS (Wide Area Augmentation System) improves vertical accuracy—integral for situational awareness and georeferenced charts.</p><h4 collapsed="false" seolevelmigrated="true">Weather Information Sources</h4><p>• METAR (Meteorological Terminal Aviation Routine Weather Report): Hourly surface observation; coded report with winds, visibility, ceiling, temp/dewpoint, altimeter.<br>• PIREP (Pilot Report): Pilot-reported conditions—icing, turbulence, cloud tops.<br>• Surface analysis chart: Synoptic overview—pressure patterns, fronts.<br>• Access through ForeFlight, AviationWeather.gov, or FSS (Flight Service Station) briefers.</p><h4 collapsed="false" seolevelmigrated="true">Weather Forecasting Tools</h4><p>• TAF (Terminal Aerodrome Forecast):$24\text{\unicode{x2013}}30\ \text{hr}$aerodrome forecast; issued$6\ \text{hr}$intervals.<br>• Prog charts (Prognostic charts):$12\text{\unicode{x2013}}48\ \text{hr} outlooks displaying fronts, pressure systems, and precipitation.
• Evaluate trends: Compare METARs & TAFs to anticipate changes along route.

Hazardous Weather Products

• AIRMET (Airmen's Meteorological Information) (Sierra, Tango, Zulu): IFR (Instrument Flight Rules)/mountain obscuration, moderate turbulence, moderate icing, surface winds >30\ \text{KT}$.<br>• SIGMET (Significant Meteorological Information): Severe icing/turbulence, dust/sand storms$\gt 3\ \text{SM}$(Statute Miles) visibility reduction, volcanic ash.<br>• Convective SIGMET: Thunderstorm criteria—line$\gt 60\ \text{mi}$, embedded, hail$\geq 0.75\ \text{in}$$, tornadoes.
• Thunderstorm hazards: Wind shear, hail, icing, lightning, microbursts, severe turbulence.
• Icing consequences: Wing contour change, drag rise, weight increase → requires higher airspeed and longer landing rollout.
• Ice types:
– Clear: Glossy, transparent, heavy.
– Rime: Opaque, brittle, lighter.
– Frost: Crystalline layer—must be removed pre-flight.

Atmospheric Mechanics & Pressure Systems

• Weather driven by uneven solar heating; diurnal cycle creates pressure gradients.
• Surface winds flow from high → low pressure but deflect due to Coriolis.
• Low pressure: Counter-clockwise rotation (NH - Northern Hemisphere) → rising air → clouds/precip.
• High pressure: Clockwise rotation (NH) → sinking air → clear skies.
• Understanding these patterns aids en-route decision-making