Aviator Thumbrules

The following is intended in support of a Cessna 172.  Adapt accordingly.

Everything stated here is to be considered opinion.  Use professional resources and related due diligence to verify any and all content on this webpage, and all other Nuvistic webpages.

Aviate

  • Approach Speed when Gusting is Reported:

Gust Factor = Gusting-To in knots – Steady State Wind in knots

Final adjusted Approach Speed=Normal POH Approach Speed+(Gust Factor/2​)

  • Bank Angle to Turn Radius:  pattern and other precision maneuvers

ϕ=arctan(R/(g•V²)​)

where,
ϕ : bank angle of wings for a Cessna 172
R : radius of turn, position for 45 degree change in position, or
1/2 the distance for a 180 degree turn
g : equivalent gravitational force at the bank angle
V : velocity as true airspeed
radius and velocity must be in similar scalar units; i.e. statute miles & statute miles / hour
Cessna 172 POH publishes G-force based on wing bank angle

  • Be Predictable:  Avoid any activity that another pilot would wonder what you are doing.  Communicate intentions.
  • Camera Looking Forward: For tailwheel aircraft, or flying from the backseat.  A video camera looking forward with an in-cabin monitor the pilot can see, can help eliminate blind spots and prevent ground collisions and missed turns.
  • Centerline Reference: Avoid parallax errors by using a fixed reference point on the cowling (such as a screw or fastener) or side of an instrument, aligned with the taxiway line during ground operations. Use this point in-flight to guide alignment with the runway centerline (slip not crab).
  • Controlling Descent on Final (Visual): If your aiming point on the runway appears to be moving up in your windshield, you are too low. If it’s moving down, you are too high. If it stays still, you’re on a good glide path to that point.
  • Crosswind Tendencies: Left crosswind means flight into a low pressure zone. Right crosswind means flight into a high pressure zone.
  • Cruise Leaning: For cruise, aim for 2300 RPM, less than 330 CHT, and less than 1350 EGT.
  • Density Altitude and Takeoff: For every 1,000 feet increase in density altitude, takeoff distance increases by 10%.
  • Derating Calculation: Derate calculations by 20% towards safety for wear and pilot proficiency.
  • Descent Rule (3-6 Rule): To calculate descent plan for a 3-degree glideslope. Distance to start descent, and at -ft/min.
    • For every 1,000 feet of altitude loss, you need 3 nautical miles of distance to descend, and descent rate should be roughly 6 times your groundspeed in knots (measured in feet per minute).
    • using a GPS, speed is ground speed  (GS x 6 = -FPM)
    • [altimeter minus (airport + traffic pattern altitude)] x 3/1000  = Nautical Miles from traffic pattern to begin decent
  • Engine Performance: Engine horsepower decreases by about 3% for each 1,000 feet of altitude.
  • Engine Warm-Up: Allow the engine oil temperature to reach the green arc (or manufacturer-recommended minimum) before applying full power for takeoff, especially in colder weather.
  • Flare Technique: When pulling back on the flare, don’t give back to avoid positive feedback and ballooning/porposing.
  • Flaps and Go-Around: If initiating a go-around from a full-flap configuration, retract flaps in stages (e.g., 30 to 20, then 20 to 10 or 0) to avoid a sudden loss of lift.
  • Go-Around Decision Point: If the approach is not stabilized by a certain altitude (e.g., 200 feet AGL), commit to a go-around. Never force a bad landing.
  • Go-Around Altitude: If you are still unstable at 200 feet AGL on final approach, execute a go-around. (This is a common hard deck for decision making).
    • Go-Around if Landing Checklist has not been completed
  • Ground Operations:
    • When taxiing tailwheel airplanes:
      climb into a headwind; plant tail wheel & keep wing into wind down
      dive away from a tailwind.
    • For a nosewheel (tricycle gear) airplanes:
      turn into a headwind with elevator neutral; don’t let elevator life nose wheel & wing down
      dive away from a tailwind.
  • Cloud Base (in feet AGL):  (Surface Temperature – Dew Point) ÷ 4.4 x 1,000
  • Cloud Base (in meters AGL):  (Surface Temperature – Dew Point) ÷ 2.5 x 1,000
  • Approximate Farenheit to Celcius:  (Tf – 30)/2
  • Approximate Celcius to Fahrenheit: (Tc * 2) + 30 
  • Knot relations: 60 knots = 1 nm/min = 1.15 miles/min
    • 60:1   90:1.5    120:2    150:2.5    180:3
  • Landing Consistency: Practice aiming for the same touchdown point every time. Consistency is key to improving landing skills.
  • Landing Sight Picture: When landing, look at the end of the runway.
  • Look Ahead: When flying, look far ahead to detect changing conditions (weather, terrain, traffic, fix, nav aid, ) and anticipate your next actions.
  • Oil Consumption Monitoring: Keep a log of your aircraft’s oil consumption between flights. Sudden changes can indicate an engine issue.
  • Oil Level: “Five quarts is a full tank, four quarts is an airplane.” This means some pilots will fly with 4 or 5 quarts, even if the POH recommends more, because engines often consume the rest quickly, helping to prevent excessive oil blow-by. Always check your POH for minimums.
  • Pitch for the Horizon, Power for Speed: This is a simplified way to think about controlling the aircraft during the flare. Maintain a consistent pitch attitude relative to the horizon, and use small power adjustments to bleed off airspeed and control the rate of descent relative to stalling just after touchdown.
  • Practice to Anticipate: Make a habit of thinking ahead.
  • Propeller Clearance: On the ground, ensure at least 9 inches of propeller tip clearance from the ground. This is important for grass strips, uneven terrain, & strut squat.
  • Propeller Strike: Even a seemingly minor propeller strike (e.g., hitting a taxiway light, ground loop resulting in prop contact) requires a detailed engine inspection before the next flight, as it can induce internal engine damage.
  • Pusher Prop Strikes: Canard pusher aircraft attempting short field landings have  prop strikes.
  • Rollout: Roll out to heading using half the angle of bank.
  • Rudder Control: “Happy feet, jab and dance.”
    • More deflection when first accelerating, less as airspeed increases.
    • Less deflection when first decelerating, more as airspeed decreases.
    • Fly the plane from tie down to tie down.
  • Runway Alignment (Initial): For runway alignment try to pick a distant landmark or cloud directly on the runway centerline before you even start your takeoff roll. This helps keep you straight.
  • Runway Pattern 90’s: The Vertical Compass has marks every 90 degrees. When lined up on runway for takeoff, the runway heading will roughly correspond with each of these marks during upwind, crosswind, base, and final. Expect variation due to crab angle.
  • Sectional Distance:
    • 1 degree latitude = 60 nm
      • North/South
      • tip of finger to crease at knuckle
      • 1 second latitude = 6 nm
    • 1 degree longitude = cos(latitude)*60 nm
      • East/West.
  • Short Field Landing: For a short field landing, you want your aiming point to remain constant in your windshield until very short final, then slowly drop below the nose as you transition to the flare.
  • Smooth Control Inputs: During landing, particularly in crosswinds or gusty conditions, use smooth, coordinated control inputs rather than jerky movements. This helps prevent overcontrolling and unintended stalls.
  • Soft Field Landing: Maintain slightly positive pitch at touchdown, use minimal braking, keep weight off the nose wheel as long as possible.
  • Stall Speed Increases significantly with:
    • bank angle;
    • pulling back on yoke;
    • abrupt control movements;
    • adding weight to aircraft;
    • throttling up in a left turn;
    • sudden lull in wind (opposite of a gust)
      • tree lines can obstruct a strong head wind and suddenly change indicated air speed on one or both wings; when one wing has lift and the other wing is stalled, the airplane will tend to rotate and turn, potentially causing both wings to stall.
  • Standard Rate Turn in Pattern: In the traffic pattern, a standard rate turn (3 degrees per second) is often too slow for the base-to-final turn, especially in stronger winds. Be prepared and practice rolling into a steeper bank as needed.
  • Standard Rate Turn Timing: For a standard rate turn (3 degrees per second), it takes 1 minute to turn 180 degrees.
  • Takeoff Abort (70/50 Rule): If you haven’t reached 70% of your liftoff speed by 50% of the runway remaining, abort the takeoff. This assumes constant acceleration; refine this by applying it to your POH’s calculated ground roll.
  • Takeoff Roll Acceleration Check: If your acceleration during the initial takeoff roll feels significantly slower than normal, abort the takeoff. Trust your gut.
  • Takeoff Speeds with Flaps UP:
    • Rotation Speed (Vr) is 55 KIAS for a normal takeoff
    • Best Angle of Climb Speed (Vx) is around 60 KIAS
    • Best Rate of Climb Speed (Vy) is around 74 KIAS
    • Climb Speed (after takeoff) is typically 70-80 KIAS.
  • Tire Check: If you can see the valve stem, the tire isn’t flat. This is a quick visual check for a significantly deflated tire.
  • Trim Practice: Practice flying trimmed with fingertips, using small control movements.
  • Weight and Performance: A 10% increase in weight results in a 20% longer takeoff and landing distance.

Checklists

  • Abnormal Checklists:
    • Engine Rough Running Checklist: Provides steps to troubleshoot engine misfires or performance issues.
    • Electrical Failure Checklist: Covers loss of electrical power or failure of individual systems (e.g., alternator or battery issues).
    • Cabin Pressurization Issue Checklist: Used in aircraft with pressurized cabins to address issues like altitude warnings or cabin depressurization.
  • Checklist Discipline: Don’t just read the checklist; perform the action associated with each item. Touch the controls, confirm the setting.
  • Normal Checklists:
    • Pre-Flight Checklist: Before stepping into the cockpit, pilots must ensure the aircraft is ready for flight. This checklist ensures the aircraft is airworthy before starting the engine. Includes checks on fuel levels, controls, instruments, and external surfaces.
    • Before Start Checklist: Once in the cockpit, pilots perform a series of checks before starting the engine to ensure all systems are properly set. Key steps include avionics and electrical setup, fuel system checks, and passenger briefings.
    • Engine Start Checklist: Starting the engine requires precise coordination of fuel, air, and ignition systems. This checklist ensures a smooth start-up sequence, including fuel mixture settings, ignition, and electrical system checks.
    • Before Take-off Checklist: Before lining up on the runway, pilots double-check critical flight systems, including flight controls, flap settings, trim position, and take-off briefings. Last-minute checks help catch any overlooked issues before committing to take-off.
    • Climb Checklist: Once airborne, pilots must transition from take-off power to climb settings while maintaining aircraft performance. It ensures proper engine performance, climb power settings, and transition to cruise flight.
    • Cruise Checklist: At cruising altitude, the focus shifts to fuel efficiency, engine parameters, system monitoring, and navigation accuracy.
    • Descent Checklist: As the destination approaches, pilots must prepare for a controlled descent and landing approach. Key steps include reducing speed, setting approach configurations, and briefing for arrival.
    • Before Landing Checklist: Pilots perform last-minute safety checks before touchdown, such as landing gear deployment, flap settings, and approach speed verification speed adjustments. This helps prevent unstabilised approaches that could result in hard landings or go-arounds.
    • After Landing Checklist: Once the aircraft is safely on the ground, post-landing checks ensure a safe taxi to the gate or parking area, including retracting flaps, turning off unnecessary lights, and verifying brake function.
    • Shutdown Checklist: Arriving at the parking area, pilots must secure the aircraft and power down, securing the aircraft, and final post-flight checks.
  • Pre-Landing Checklist (CL-GUMPS): A quick memory aid for your pre-landing checks:
    • Carb Heat(always on when power is reduced for landing)
    • Lights
    • Gas (fuel selector – both, fuel pump – on);
    • Undercarriage (landing gear down, parking brake off);
    • Mixture (rich for landing);
    • Propeller (POH landing RPM for constant speed props);
    • Switches/Seatbelts/Safety (Loose Items stowed)
  • Pre-Maneuver Checklist (CLEFTS):
    • Clearing Turns (look for traffic);
    • Landing Light (on for visibility);
    • Engine instruments (check oil temp/pressure, CHT/EGT);
    • Fuel (check quantity, select proper tank);
    • Transponder (on and appropriate code);
    • Safety brief (for passengers if applicable).

Communicate

  • Aviation Phraseology: Use standard aviation phraseology on the radio. It improves clarity and reduces misunderstandings.
  • Loss of Communications (VFR): If you lose comms in VFR conditions at a tower-controlled airport, look for light gun signals from the tower. If landing, circle and wait for a steady green light.
  • Radio Calls (Standard Traffic Pattern):
    • Departure: “Traffic [airport name], [aircraft type and tail number] departing runway [number], straight out/left/right departure.”
    • Downwind: “[Airport name] traffic, [aircraft type and tail number] entering/midfield downwind runway [number].”
    • Base: “[Airport name] traffic, [aircraft type and tail number] turning base runway [number].”
    • Final: “[Airport name] traffic, [aircraft type and tail number] on final runway [number].”
    • After Landing: “[Airport name] traffic, [aircraft type and tail number] clear of runway [number].”
      • Or back taxi/exiting
  • Runway Condition Reporting (PIREP): If you experience unusual braking action or significant turbulence on takeoff or landing, offer a PIREP (Pilot Report) to ATC or UNICOM for the benefit of other pilots.
  • Stuck Microphone: If you transmit and your mic gets stuck open, you’ll block the frequency. Listen for your own voice in the headset, check the transmit light, and quickly try to unstick or unplug the mic.

Cessna 172 Pattern Procedure

  • Takeoff Speeds with Flaps UP:
    • Rotation Speed (Vr) is 55 KIAS for a normal takeoff
    • Best Angle of Climb Speed (Vx) is around 60 KIAS
    • Best Rate of Climb Speed (Vy) is around 74 KIAS
    • Climb Speed (after takeoff) is typically 70-80 KIAS
  • Cruise Power Settings: Consult your POH for recommended power settings based on desired speed and fuel economy. A common “training cruise” power setting in a C172 might be around 2300-2400 RPM.
  • Downwind Abeam the Numbers: When abeam the touchdown point (or numbers) on the downwind leg: reduce power (e.g., 1500-1700 RPM for a C172), apply carb heat, add 10 degrees of flaps, pitch for descent (e.g., 85-90 KIAS), and trim.
  • Base Leg Turn (45 degrees past threshold): Turn onto base when the runway threshold is approximately 45 degrees behind your wingtip. At least 1/2 mile past the end of the runway.  Add 20 degrees of flaps. Pitch for base leg speed (e.g., 70-75 KIAS). Continue descent. If you have a headwind on base, you’ll need a longeer base leg; if a tailwind, a shorter base leg (or a steeper bank to prevent overshooting final).
  • Base Leg Altitude: Aim to be around 600-800 feet AGL on the base leg, but this is highly variable with wind. The goal is to be at an altitude that allows a continuous, stable descent to final.
  • Crosswind Landings (Crab Method): Fly with a crab angle into the wind on final, then kick out the crab with rudder just before touchdown, simultaneously dropping the upwind wing with aileron to keep straight.
  • Crosswind Landings (Slip Method): Maintain slip into the wind and use opposite rudder to align with the runway centerline and control descent.
  • Power for Altitude, Pitch for Airspeed (on Final): On final approach, this is critical. If you’re too high, reduce power (but maintain airspeed with pitch). If you’re too low, add power (but maintain airspeed with pitch).
  • Turning Final: Begin your turn from base to final when the runway centerline appears in a fixed reference position in your side window (e.g., in some position near the wing strut). This takes practice!
  • Final Approach Speed: For a normal landing, aim for around 65-70 KIAS (with appropriate flaps) for a C172. This provides a good margin above stall and good control.
  • Flare Height: Begin the flare when you’re about 10-15 feet above the runway. Look down the runway, not directly at the nose.
  • Short Field Landing: Approach at a slower, but still safe, speed (e.g., 61 KIAS with full flaps for a C172; 1.4 Vso minimum). Aim for the very beginning of the runway. Max braking after touchdown.
    • The flare will bleed speed quickly, you don’t want to stall much before the wheels touch down
  • Soft Field Landing: Maintain slightly positive pitch at touchdown, use minimal braking, keep weight off the nose wheel as long as possible.
  • Touchdown: Aim for main wheels first, then gently lower the nose wheel. Keep back pressure to maximize aerodynamic braking.

Emergency Procedures

  • Aircraft Fire (External): If you observe an external fire (e.g., wheel well fire on the ground), keep the aircraft moving if safe and stay on the asphalt (do not start a grass fire), move to a ramp area, call Ground and report, then shut down engines, lock parking brake, and evacuate with a fire extinguisher and extinguish the fire if feasible.  If not safe, move far from the aircraft and wait for the emergency response crew.  Keep non-emergency persons away from danger.
  • Alternator Failure Indication: The first indication of an alternator failure is often a discharge on the ammeter or a “low voltage” warning light. Immediately reduce electrical load.  Monitor for smoke and/or fumes.
  • Electrical Failure: Reduce electrical load, check circuit breakers, land as soon as practical.
  • Electrical Fire Action: “Avionics master off, master switch off, land as soon as practical.” The priority is cutting off power to the source of the fire.
  • Emergency Squawk Code (7700): If you’re going to squawk 7700, be prepared to talk to ATC immediately. They will be looking for you.
  • Engine Failure (Glide): Every 1,000 feet of altitude gives approximately 1-1.5 nautical miles of glide distance. (Dependent on aircraft and conditions).
  • Engine Failure (Immediate Action): Pitch for best glide speed (e.g., 65 KIAS for a C172, check your POH for your specific model). Immediately identify suitable landing areas within gliding distance. Memory items: Fuel selector (BOTH), Mixture (RICH), Carb Heat (ON), Fuel Pump (ON), Magnetos (BOTH, then START). Declare Emergency (Squawk 7700): If time permits and you’re in communication, squawk 7700 and declare your emergency on 121.5 MHz or your current ATC managed frequency.
  • Engine Failure at Cruise Altitude: If an engine fails at cruise altitude, don’t rush the decision on where to land. You have time to troubleshoot and pick the best option, not just the first option.
  • Engine Failure After Takeoff (The “Impossible Turn”):
    • Below 500-1000 feet AGL (depending on aircraft/pilot skill/conditions): Land straight ahead or within 30-60 degrees of your heading. Do NOT attempt to turn back to the runway unless you have sufficient altitude.
    • About 1000 feet AGL (traffic pattern altitude): You might have enough altitude to attempt a turn back to the airport, but it requires immediate action, precise energy management, and a pre-planned turn. Many instructors teach a safer option is to land off-airport within 60 degrees of runway heading.
      • If surrounded by forest, an urban area, mountains, water… it’s better to have a well maintained aircraft
      • Practice on flight simulators
      • If taking off at Vx, up to 500 AGL, there is a good chance with nose over to short field speed and configuration to land and stop before the end of the runway.  Practice on flight simulator.
      • From 500 to  800 AGL, landing on an unoccupied taxiway may be a better alternative, to avoid making extra turns.  It requires 360 degrees total of turns to land on the departing runway.
      • Landing on mowed grass portions of an airfield not designated as a runway is dangerous due to ditches, holes, electrical boxes and conduit for airport facilities… making emergency risk assessments can be complex.
    • If upwind and turning back at pattern altitude, steeper coordinated turns shorten the distance from engine out, to back flying the takeoff runway.  In a Flight Simulator using a 172 this was consistently performed; and had to use S-turns to lose altitude.  Practice any procedure you intend to use on a flight simulator to increase your safety margins.  Then coordinate with a CFI to practice real life scenarios if feasible.
    • Stay aware that back landing a runway will have a tail wind.  Keep IAS up to POH landing speed, regardless of visual references to Ground Speed.  May require a longer rollout.
  • Engine Fire During Start: If an engine fire occurs during start, continue cranking (if safe) to try and suck the flames into the engine, then shut down fuel and master.
  • Fire: “Fuel, Air, Spark” (FAS) – Identify and cut off the source of the fire.
  • Fire Extinguisher Use: If you have an onboard fire extinguisher, remember the “PASS” method: Pull, Aim, Squeeze, Sweep.
  • Fix Prompt: Turn, time, twist, throttle, talk, and track.
  • Forced Landing Setup: After an engine failure, configure for landing (flaps, gear, if applicable) only after you have committed to a field and determined you can make it. Don’t add drag too early.
  • Forced Landing Troubleshooting (Immediate): If the engine is completely dead at low altitude, Aviate and get on a glide path to a landing zone.  Spend no more than 10-15 seconds in attempting a restart. Your priority shifts to a safe landing.
  • Gear-Up Landing (If Applicable): If your gear won’t extend, plan for a firm, nose-high landing, sacrificing the propeller/engine to protect the occupants.
  • Low Fuel Warning Light: Treat a low fuel warning light as a serious indicator. Do not attempt to stretch fuel. Land at the next available airport.  Start searching for emergency landing zones without deviating from a direct course to the nearest airport.  Notify ATC of a potential impending emergency, and your plan of action.
  • Oil Pressure Loss: If you lose oil pressure, immediately reduce power to minimum safe settings and land at the nearest suitable airport. Zero oil pressure usually means imminent engine failure.
  • Rough Engine: Carb Heat ON, Mixture adjust (lean for smoothness), Fuel selector switch tanks, Fuel pump ON, Magnetos check (L/R/BOTH).
  • Rough Engine (Power Setting): If the engine runs rough, try adding or reducing power slightly. Sometimes a small change in RPM can smooth out engine operation by changing vibration modes or carburetor mixture.
  • Stuck Throttle: If the throttle is stuck at a high power setting, pitch up to reduce airspeed into the white arc. Leaning mixture to control engine RPM can damage engine. Deploy flaps/gear to increase drag. Control airspeed with pitch and plan for a power off landing. If an engine restart is required for a go around, anticipate severe turning and rolling forces to the left.
  • Vacuum System Failure: If your vacuum gauge drops to zero, your gyroscopic instruments (attitude indicator, heading indicator) are no longer reliable. Rely on your turn coordinator and magnetic compass.

Flight Planning

  • 800 WX BRIEF: Call 800 WX BRIEF before any cross country flight.
  • Altimeter Setting Accuracy: When dialing in the altimeter setting from ATIS/AWOS, if the difference from your field elevation is more than 75 feet, it’s worth double-checking the setting, question the source, check for instrument failure.
  • Avoid Shock Cooling: During descent, avoid rapid reductions in power, especially after prolonged high-power cruise. Reduce power gradually and use a descent profile that allows the engine temperatures to cool slowly and evenly, preventing stress on cylinders.
  • Cold Engine Start: Prime less for a warm engine, more for a cold engine. Listen for the initial “burble” after priming to indicate fuel is reaching the cylinders.
  • Compass Deviation Card: Always check the compass deviation card is present and legible. The compass is your last resort for navigation if all electronics fail.
  • Control & Gust Lock Removal: Always verify “all” control & surface locks are removed before attempting to start the engine or taxi.
  • Crosswind Calculation:
    • 15 degrees: About 1/4 or 25% of the wind speed.
    • 30 degrees: About 1/2 or 50% of the wind speed.
    • 45 degrees: About 7/10 or 70% of the wind speed.
    • >60 degrees: About 100% of the wind speed.
  • Cruise Leaning (Properly): Leaning the mixture in cruise flight (according to the POH or EGT/CHT indications) not only saves fuel but also helps keep spark plugs clean and prevents lead fouling, contributing to smoother and more reliable operation.
  • Decrease Va: Decrease Va by 2 knots for each 100 lbs below max gross.
  • Diversion Planning: Always have a mental (or actual) backup airport, or landing zone, within reasonable gliding distance. If an issue arises, you want options.
  • Estimated Time En Route (ETE): Recalculate your ETE at significant waypoints or after a major change in winds or airspeed. Don’t rely solely on your initial calculation.
  • Flight Following: If possible and available (especially for cross-country flights), request Flight Following from ATC. It provides workload relief and an extra set of eyes for traffic and weather.
  • Fuel Consumption: HP/20 = (HP/2)/10 = GPH; Varies by aircraft model and load; see POH.
  • Fuel Management: Always plan to land with at least 45 minutes of reserve fuel during the day, and 1 hour at night. If using flight following, be prepared for longer vectors.
  • Gradual Power Changes: Avoid rapid or abrupt throttle movements. Smooth, gradual power changes reduce stress on engine components and the propeller.
  • High, Hot, and Humid: These three “H” factors—high altitude, high temperature, and high humidity—all lead to a higher density altitude. High density altitude significantly reduces an aircraft’s performance. A high density altitude means the air is less dense. This “thinner” air results in less lift from the wings, less thrust from the propeller, and less power from the engine. Consequently, the aircraft will have a longer takeoff roll, a reduced rate of climb, and a lower service ceiling.
  • Humidity: While not as significant as temperature and pressure, high humidity can also increase density altitude. A good rule of thumb is to add 10% to your takeoff distance in particularly hot and humid conditions.
  • International Standard Atmosphere (ISA): with standard sea level conditions of 15 °C (59 °F) and 29.92 inches of mercury (1013.25 millibars).
  • Lean for Cruise (Properly): Leaning the mixture in cruise flight (according to the POH or EGT/CHT indications) not only saves fuel but also helps keep spark plugs clean and prevents lead fouling, contributing to smoother and more reliable operation.
  • Magnetic Dip: Be aware of magnetic dip errors. When accelerating on an easterly or westerly heading, the compass shows a turn to the north. When decelerating, it shows a turn to the south.
  • Magnetic Lag: When turning from a northerly heading, the compass will initially lag the actual turn. When turning from a southerly heading, it will lead the actual turn.
  • Monitor Engine Instruments Closely: Don’t just glance at the gauges; actively monitor oil pressure, oil temperature, cylinder head temperature (CHT), exhaust gas temperature (EGT), and fuel pressure. Trends or sudden changes can indicate a developing problem before it becomes critical.
  • PAPI/VASIs: Two white, two red, you’re all right. More white, you’re too high. More red, you’re dead (or too low).
  • Performance Reduction Percentages: For a fixed-pitch propeller, add approximately 12% to the standard sea-level takeoff distance for every 1,000 feet of density altitude up to 8,000 feet. For a constant-speed propeller, add 10% for every 1,000 feet.
  • Pilotage Landmarks: Pick out easily identifiable landmarks for your route, such as major highways, towns, rivers, or unique geological features.
  • Post-Flight Inspection: After each flight, a quick walk-around can reveal oil leaks, loose cowling fasteners, or other signs of engine stress that could affect future reliability.
  • Proper Magneto Maintenance: Ensure magnetos are serviced and inspected regularly according to the manufacturer’s recommendations. Healthy magnetos are essential for reliable ignition.
  • Proper Pre-Heating (Cold Weather): In cold conditions (below 20-40°F, depending on engine type), pre-heating the engine before starting helps ensure proper lubrication flow to all components immediately, reducing wear on start-up.
  • Propeller Balance: A well-balanced propeller reduces engine vibration, which can significantly extend the life of engine components and avionics. Report any unusual vibrations.
  • Reduced Performance: A high density altitude means the air is less dense. This “thinner” air results in less lift from the wings, less thrust from the propeller, and less power from the engine. Consequently, the aircraft will have a longer takeoff roll, a reduced rate of climb, and a lower service ceiling.
  • Regular Oil Changes and Filter Replacement: Adhere strictly to the manufacturer’s recommended oil change intervals and filter replacements. Clean oil is crucial for lubrication and cooling.
  • Runway Length (Wind): For every 10 knots of headwind, your takeoff roll is reduced by approximately 10%. For every 10 knots of tailwind, your takeoff roll is increased by approximately 20%. (This is a rough estimate, POH is king).
  • Sectional Chart Updates: Always use current sectional charts. Minor changes to airspace, obstacles, or frequencies can occur frequently. (Check the publication date in the corner).
  • Standard Temperature Lapse Rate: temperature decreases by 2°C for every 1000 feet of altitude gain up to 36,000 feet.
  • VFR Visibility Minimums (General): If you can’t see 3 statute miles horizontally and stay 500 feet below, 1000 feet above, and 2000 feet horizontally from clouds in uncontrolled airspace, you shouldn’t be flying VFR. This is a simplified rule for a quick mental check, but always refer to exact FARs.
  • Weather Briefing Depth: Don’t just get a “go/no-go” briefing. Understand the why behind the forecast. Look at surface analysis charts, winds aloft, and radar.
  • Weight & Balance: Always err on the side of caution. An aft CG will make the aircraft less stable and more prone to stalling. A forward CG increases stall speed and reduces elevator authority.
  • “What If” Scenarios: Regularly run “what if” scenarios in your head before and during flights (e.g., “What if the engine quits here?”, “What if this cloud deck lowers?”). This builds critical thinking and preparedness.
  • Wheel Fairings/Pants: If your aircraft has wheel fairings, ensure they are free of debris and damage. A bent or damaged fairing can rub against the tire, causing drag or even a flat.

Flight Planning and Management Software

Navigate

  • 1 in 60 Rule: If you are off course by one nautical mile after flying 60 nautical miles, you have a one-degree tracking error. This also applies in reverse: 1 degree of off-course indication on a VOR at 60 miles means you are 1 mile off course.
  • Altitude for Terrain Clearance: When flying over mountainous terrain, maintain at least 2,000 feet above the highest obstacle within 5 nautical miles. (VFR minimum is 1,000 feet, but 2,000 is a safer buffer).
  • Calculating Magnetic Course: “True Course +/- Magnetic Variation = Magnetic Course.” “East is least (subtract), West is best (add).”
  • Calculating Top of Climb: If you’re climbing at 500 FPM, it will take you 2 minutes to climb 1,000 feet. Use this to estimate time to cruise altitude.
  • Correcting for Altitude: Since an aircraft performs as if it were at the density altitude, it may be necessary to lean the engine before takeoff, even at a lower elevation airport, to achieve maximum performance. This is a common practice at high-altitude airports.
  • Density Altitude: Add 120 feet for every 1°C increased deviation from the standard temperature. DA = PA + 120(OAT – Tisa) — where Tisa = 15°C; Tisa drops 3.5°F/2°C for every 1,000 feet gained.
  • Estimated Time En Route (ETE): Recalculate your ETE at significant waypoints or after a major change in winds or airspeed. Don’t rely solely on your initial calculation.
  • IFR Minimum Altitudes (VFR Awareness): Even as a VFR pilot, be generally aware of minimum IFR altitudes (e.g., 1,000 feet above highest obstacle within 4 NM in non-mountainous, 2,000 feet in mountainous). This gives you an idea of where instrument traffic might be.
  • ILS as Visual Aid: Use ILS as a visual aid for straight-in approaches.
  • Lost Procedure (5 Cs): Climb, Communicate, Confess, Comply, Conserve. If you get lost, climb for better radio reception/visibility, communicate on 121.5 or current freq, confess you’re lost, comply with ATC instructions, and conserve fuel.
  • Meters to Feet: Meters multiplied by 3 plus 10%.
  • Pilotage Landmarks: Pick out easily identifiable landmarks for your route, such as major highways, towns, rivers, or unique geological features.
  • Rule of Thumb Calculation: For every 10°F increase in temperature above the standard temperature at a given elevation, add approximately 600 feet to the field elevation to determine the density altitude. A simpler version for Celsius is to add 120 feet for every 1°C above standard.
  • VFR Cruising Altitudes: “Odd Thousands + 500” for VFR East, “Even Thousands + 500” for VFR West (Above 3,000 ft AGL). For example, Eastbound: 3,500, 5,500, 7,500 ft; Westbound: 4,500, 6,500, 8,500 ft.
  • VOR/GPS Navigation Check: When navigating with VORs or GPS, regularly cross-reference your actual ground track with your intended course to detect any drift early.

 

Comments are closed.