Leisure

Behind the Prop

by Bobby Doss, Wally Mulhearn

AviationLeisureHobbies

About the show

Behind the Prop is the Podcast for anyone involved in aviation from general aviation to professional pilots. Our hosts Bobby Doss is the owner of a flight school in Houston, Texas, and Wally Mulhearn is a pilot for a major airline and is also a designated pilot examiner (DPE) based in Houston, Texas. Weekly they tell stories, share lessons and tips from behind the prop. Together they have over 24,400 hours of flight time (Wally has over 24,000 of those) and collectively they provide very unique perspectives on general aviation, airplanes, and all things aviation.

Latest episodes

E204 - What does that BLUE KNOB actually do?

October 5, 2026 · 43 min

In episode E204 of Behind the Prop, hosts Bobby Doss and Wally Mulhearn dive into the function of the blue knob in constant speed propeller systems. They explain it as the RPM selector that acts like a transmission by changing propeller…
E203 - Ask the DPE - Part II

September 21, 2026 · 47 min

In this episode of United Flight Systems, Bobby Doss continues his conversation with DPE Wally Mulhearn in part two of Ask the DPE. They dive deep into what makes an examiner nervous during checkrides, particularly during simulated engine…
E202 - Ask the DPE - Part I

September 7, 2026 · 41 min

In this episode of Behind the Prop, Bobby interviews DPE Wally Mulhern in Ask the DPE Part I. They cover what makes an applicant look ready before walking in the door, including flight time reasonableness on the 8710, IACRA applications…
E201 - The First Five Minutes

August 24, 2026 · 46 min

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…
E200 - The Flight Before the Flight

August 10, 2026 · 36 min

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…
E199 - The Dirty Dozen

July 27, 2026 · 36 min

In this episode of Behind the Prop, hosts Bobby Doss and Wally Mulhearn dive into the Dirty Dozen, a set of twelve human factor traps that can affect pilots and mechanics alike. Originally released by the FAA around 2011 or 2012 as a…
E198b - Oshkosh Dispatch

July 20, 2026 · 9 min

This episode kicks off the Oshkosh Dispatch series as Bobby Doss and Wally Mulhearn preview EAA AirVenture. They reminisce about last year's event including blimp formations and the massive scale of the airshow while discussing aviation…
E198 - True, False, or It Depends

July 13, 2026 · 42 min

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…