Lesson 9 Circuits IV.

Date: 22/10/2016
Purpose: Circuits IV
Aircraft: VH-KEP
Flight Time: 0.9

Airport: Hervey Bay Aerodrome
Instructor: EB , Briefing time (hr): 0
Time to take off: 12:00 Runway: 29
Time to land: 12:55 Runway: 29          Total Engine time: 0.9 Approx. Fuel ____
Wx: Wx at aerodrome: Temp 26 Cloud clear below 1200 ft, Wind Direction 350, Wind Strength 10 kts, Dewpoint 15, Rainfall 0, Wind types __, Visibility >10 km,  Humidity 50%, QNH 1016 Hpa, Changes in Wx Conditions, BOM daily wx obs: Temps Min (°C) 13.7, Max (°C) __, Rain (mm) 0, Evap __, Sun __, [[Max daily wind gust: Dir __, Spd (km/h) __, Time (local) __]] [[9:00am record: Temp (°C) 24.9, RH (%) 53, Cloud 1, Dir N, Spd (km/h) 17, MSLP (hPA) 1017.2]], [[3:00pm record: Temp (°C) 25.3, RH (%) 58, Cloud __ , Dir N, Spd (km/h) 22, MSLP (hPa) 1012.7]]


TAF YHBA 212128Z 2200/2212

36014KT 9999 FEW035

FM220900 33006KT 9999 SCT040


T 26 27 25 23 Q 1016 1015 1013 1014

METAR YHBA 212200Z AUTO 01009KT 9999 // SCT031 24/14 Q1018

RMK RF00.0/000.0




Goals: Review previous lesson and optimise operation of aircraft… Downwind checks, operating minimums (1/2 balance ball, +10/10 heading, Vref +5 kts -0 kts, +150 ft of set altitudes, main wheels first), maintain consistent tracking, pre-landing checklist, emergency engine cut off routine practice

Briefing discussion: Home-study on circuits and own notes, no formal briefing necessary as one was due to practice the circuit pattern and improve on skills.

Tasks: pre-flight checks, oil and fuel check, wheel chocks, start-up procedures and checks, radios, take-off, climbing, descent, turns, preflight briefing (re-aborted take-off procedure), touch’n’go x5 + final landing.

90 L of fuel on take-off. Skills generally improving with the whole work routine and approach becoming second nature. Ballooning minimised with attention to airspeed – gusting is problematic for staying on centreline. Another emergency engine cut-off practiced at 500 ft, noticeably little choice to go for off runway 29 – instructor remarked “might as well just try and return to field”.
Protocol for emergency landing – dip nose for glide speed, select field, flap as necessary, + carb heat on + fuel pump on + mixture rich.

After third circuit, shown how to do a flapless approach and then practiced 2-3x. It was explained that the descent is supposed to be shallow and the nose is pitched higher than usual – clean stalling airspeed +8-9 kts above typical stalling speed with full 40 deg flaps (51 kts in KEP). Noticeably more buffeting from thermals at lower altitudes.

For something different I decided to record my radio calls to see how I may be being interpreted… I used an old software defined radio usb stick (NooElec R820T2 SDR & DVB-T NESDR Mini 2) and HDSDR to tune into the CTAF frequency (126.55 MHz) and record the transmissions. Overall I was surprised how well it worked considering I left the computer as-is at ground base in a building that was basically a faraday cage for radio signals. In anycase, I have provided a recording of calls from VH-KEP below.



Next week exam topics: Radio calls and Pre-flight solo questions… some of the potential topics include;
– Radio readability levels
– PanPan calls vs Mayday calls
– Water and fuel density
– Mixture concentration
– Icing phemnomenon (induced, impact, fuel, throttle)
– VMC… Visual meterological conditions
– Limitations on flying – 500 ft over terrain, 1000 ft over built up areas…
 – Transponder ‘squark code’ settings: 1200 for VFR, 1202 for gliders, 3000 for controlled airspace, 7500 for hijack ’7, 5 taken alive’, 7600 communications failure ’7, 6 radio fix’, 7700 Emergency ‘7,7 going to heaven’.

Radios: YHBA AWIS 134.9 MHz, general CTAF 126.55 MHz



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