313 The Vmc Demonstration and Making Multiengine Training Safer - Seth Lake + GA News

Max talks with Seth Lake about Vmc (Minimum Control Speed with the Critical Engine Inoperative) maneuvers, particularly focusing on their importance in multi-engine training. Seth also talks about the challenges and risks associated with VMC demonstrations and offers constructive suggestions for improving training practices in multi-engine aircraft. Seth explains that Vmc is the minimum controllable airspeed of a multi-engine aircraft when the critical engine is inoperative, and the operative engine is at full power. The FAA mandates specific criteria for this maneuver, emphasizing the need for multi-engine pilots to understand how to control an aircraft during asymmetrical power events. VMC demonstrations are a crucial aspect of multi-engine training, requiring pilots to recover from a VMC condition during their practical tests. The critical engine, which has the most adverse effect on the aircraft when inoperative, is typically determined by factors like P-factor, accelerated slipstream, spiraling slipstream, and torque. The interview delves into the intricacies of Vmc, including how manufacturers are allowed up to 150 pounds of rudder force for certification purposes, and highlights the challenges pilots face in maintaining control during a Vmc scenario. Seth Lake describes an unscientific test he conducted using a force measurement tool in one of his aircraft, revealing the significant rudder forces required to hold coordinated flight in Vmc conditions. He also talks about altitude considerations during Vmc demonstrations. The discussion then turns to the FAA's guidelines for the Vmc demonstration during commercial check rides, examining the specific setup and recovery procedures outlined in the ACS. He also mentions a potential contradiction in other FAA publications, such as the Practical Test Standards for multi-engine instructors, and the importance of understanding these nuances. Seth also raises concerns about the inherent risks associated with Vmc demonstrations and suggests potential improvements to the current practices. He proposes an alternative method that involves holding the ailerons neutral, using full rudder deflection, and avoiding the five degrees of bank specified in the certification criteria. This alternative method aims to increase safety by reducing the likelihood of spins and providing a more realistic experience of loss of directional control. The interview concludes with a discussion on the impact of passenger weight on the aircraft's center of gravity during Vmc demonstrations and highlights the need for careful considerations to enhance safety in these maneuvers. If you're getting value from this show, please support the show via PayPal, Venmo, the Cash app, Zelle or Patreon. Support the Show by buying a Lightspeed ANR Headsets Max has been using only Lightspeed headsets for nearly 25 years! I love their tradeup program that let's you trade in an older Lightspeed headset for a newer model. Start with one of the links below, and Lightspeed will pay a referral fee to support Aviation News Talk. Lightspeed Delta Zulu Headset $1199 Lightspeed Zulu 3 Headset $899Lightspeed Sierra Headset $699 My Review on the Lightspeed Delta Zulu Send us your feedback or comments via email If you have a question you’d like answered on the show, let listeners hear you ask the question, by recording your listener question using your phone. News Stories Plane breaks through the ice of Pineview Reservoir, UT Plane door found 6 miles from Londonderry, NH crash site Activation of auxiliary fuel boost pump shortly after takeoff leads to crash NTSB Wants Spin-recovery Procedure Added to Twin Commander POH Ocean Exploration Company Thinks It Found Earhart’s Airplane Austin to Get Advanced Tower Simulator for Controller Training and Safety Long Beach Subsidizes Unleaded Avgas Brazil intercepts illegal flight over Indigenous land invaded by gold miners Mentioned on the Show Incorrect Altitude Readback Leads To Near CFIT Incident Flying Tiger Line Flight 66 Crash Max's Interview on Dr. Scott Dennstaedt YouTube channel Free Index to the first 282 episodes of Aviation New Talk So You Want To Learn to Fly or Buy a Cirrus seminars Online Version of the Seminar Coming Soon – Register for Notification Check out our recommended ADS-B receivers, and order one for yourself. Yes, we’ll make a couple of dollars if you do. Get the Free Aviation News Talk app for iOS or Android. Check out Max’s Online Courses: G1000 VFR, G1000 IFR, and Flying WAAS & GPS Approaches. Find them all at: https://www.pilotlearning.com/ Social Media Like Aviation News Talk podcast on Facebook Follow Max on Instagram Follow Max on Twitter Listen to all Aviation News Talk podcasts on YouTube or YouTube Premium "Go Around" song used by permission of Ken Dravis; you can buy his music at kendravis.com If you purchase a product through a link on our site, we may receive compensation.