Behind the Prop

In this episode of Behind the Prop, hosts Bobby Doss and Wally Mulhearn take on the one airplane system that can hurt you while it makes you feel better: cabin heat. Starting from a cold morning climbing out of Hooks with a toasty cabin, a little sleepiness and a headache, they walk through where the warm air really comes from in a Cessna 172, from the wing inlet and the cabin air flap to the shroud around the muffler, and why the heater warms outside air instead of piping exhaust into the cabin. Wally shares the two-paragraph heating and ventilation section from the Piper Tomahawk POH he bought after his first flying lesson in 1981, explains what a good checkride answer sounds like, and makes the case that reading the POH beats repeating what you heard around the flight school. They discuss why a crack hidden inside the shroud is the real concern, how inspections and A&P carbon monoxide checks during run-ups help catch problems, and a 2024 NTSB case in which a Mooney M20E pilot made a forced landing in a field after his two carbon monoxide detectors alerted. The hosts cover headache and drowsiness as warning signs, why an electronic CO monitor beats a spot card that has no alarm, and a simple flow for a suspected CO event: heat off, vents open, point toward the nearest suitable airport, tell ATC, and have a mechanic inspect the airplane even if you start feeling better.

In this episode of Behind the Prop, hosts Bobby Doss and Wally Mulhearn welcome Samuel Couillard, a propeller strike survivor and human factors speaker from Quebec, Canada. Samuel recounts the events of September 19, 2015, when as a student pilot working toward his commercial certificate and employed as a lineman at the airport, he mistakenly walked into a running propeller after an otherwise routine flight. He describes the ordinary conditions that day, the momentary lapse that led to the incident, and the profound physical and personal changes that followed, including extensive injuries and a lengthy recovery process. The conversation emphasizes human factors in aviation such as complacency after gaining experience, the difference between knowledge and consistent safe behavior, the dangers of fatigue and distraction, and the critical importance of maintaining vigilance even after the flight appears complete. Samuel shares insights from his safety seminars, highlighting how even knowledgeable pilots can make errors when routines change or confidence increases, and he offers practical advice on building personal systems to prevent such mistakes. The hosts discuss passenger briefings, eye contact on the ramp, and the value of creating barriers against complacency to ensure everyone returns home safely.

Connect with Samuel Couillard:

Bobby Doss and Wally Mulhearn open the episode by celebrating the milestone of reaching 201 shows and reflecting on listener engagement from Oshkosh and beyond. The main topic focuses on the first five minutes of flight, the phase where workload spikes as pilots manage engine start, avionics, passengers, and clearances before taxi. They stress the importance of sterile cockpit discipline once the engine is running to prevent distractions that can lead to incidents like runway excursions. Wally shares his approach to control checks before engine start and using checklists as verification tools rather than to-do lists. The conversation covers common checkride mistakes such as incomplete taxi readbacks that omit the assigned runway and failing to anticipate instructions by listening to other traffic. During the taxi to run-up phase, they highlight situational awareness in congested areas like the delta ramp at Hooks Airport and the value of positioning to allow space for others. Bobby outlines his three-part mental model of setup, decision point at run-up, and final go/no-go assessment while advocating for finding reasons not to fly rather than reasons to proceed. The takeoff decision includes the fifty-seventy rule for aborting if rotation speed is not achieved halfway down the runway and personal flows like lights, clocks, and fuel. In the initial climb they stress completing the after-takeoff checklist promptly to avoid configuration issues such as forgotten flap retraction. The episode closes with a listener challenge to develop and test a personal first-five-minutes flow along with a candid confession from Wally about once departing with a rudder gust lock still installed.

Bobby and Wally open the episode reflecting on recent experiences at Oshkosh, including social media feedback and a memorable interaction with a young aviation enthusiast whose parents are pilots. They then dive into the main topic of Episode 200, The Flight Before the Flight, stressing that most poor decisions occur during pre-flight preparation rather than in the air. The night-before sequence covers weather outlook briefings using multiple apps and 1-800-WX-BRIEF for human insight, verification of aircraft records especially for older experimental planes with modern avionics like G5 systems, fuel planning with extra margins beyond legal minimums, and self-assessment of fitness including illness or medication effects. On the morning of the flight they recommend re-evaluating forecasts against actual conditions observed outside and applying personal minimums that may differ by aircraft type such as the Saratoga versus a tailwheel. The hosts stress making these steps habitual through a simple card system and the PAVE checklist while inviting listener confessions about past decisions, shared personal minimums, and feedback on what they always check the night before. Wally adds insights from international flying on the importance of sleep management. They close by recommending the AOPA VFR personal minimums sheet and an ALPA Air Safety Institute case study called Fair Weather Flyer.

Bobby Doss and Wally Mulhearn return to the mics after a break to tackle aviation myths in this episode of Behind the Prop. They dive into common misconceptions heard in flight training, around the hangar, and during checkrides, using a true false or it depends format to separate fact from fiction. Topics range from accelerated programs and school environments to DPE interactions and real-world decision making.

The hosts explore whether accelerated training is always faster, how weather impacts learning, and the fine line between confidence and overconfidence on checkrides. They discuss crosswind components, alternate airports, and why some statements like there is always another airport can be misleading. Personal stories from both hosts add depth to the conversation about what really makes a successful pilot.

The episode wraps with a lightning round covering myths like twin engines being safer, taking the written exam first, chair flying, simulators, parachutes, controller attitudes toward students, and where learning actually happens. Bobby and Wally emphasize seeking wisdom over opinions and invite listeners to keep questioning and learning in aviation.