Version 3.2 Update is now available here:
This is a fairly substantial update. It’s taken longer than usual to produce, since I switched over to Apple and have had a rather steep learning curve, and we’ve spent considerable time over the past 18 months experimenting with Angle of Attack (AOA) in RV’s. As a result of that testing, AOA reference information has been added throughout all sections. This information is designed to help folks that have airplanes equipped with AOA systems. Substantial changes are highlighted in red font. Minor changes are not tracked. The table of contents is hyperlinked to simplify navigation.
-Objectives are updated to include AOA references for performance standards
-Hyperlinks to Powerpoint and PDF versions of the training briefings are now available for the RV Aerodynamics, RV Performance and RV Weight and Balance briefings. Text versions of briefing guides are updated to include AOA discussion. I haven’t finished the Powerpoint version of RV Airworthiness Determination and Maintenance Practices yet, so that will be included in a future update.
-Mishap statistics included in recurrent training briefing updated.
-Additional questions added to the “open book” Written Exam and Review pertaining to angle of attack.
-Extensive updates to takeoff and landing sections in Part 3 Normal Procedures. Most discussion added regards application of AOA during takeoff, pattern/approach operations and landing.
-Multiple graphics are updated throughout.
-Minor additions to Part 3 Emergency Procedures, primarily inclusion of AOA references, when appropriate.
-Maneuvering by reference to AOA section added to Handling Characteristics section of Part 3
-AOA reference information added to appropriate portions of Confidence Maneuvers and Advanced Handling sections. ONSPEED optimum turn and vertical turn maneuvers added. These maneuvers are designed specifically to introduce ONSPEED handling techniques during maximum performance maneuvering flight.
-Appendix B, Advanced Handling Briefing, updated to include additional AOA references.
-Appendix C, RV-type Handling Rules of Thumb updated to include additional AOA references.
-Appendix D added. This appendix contains hyperlinks to grade books provided for instructors to assist with training program management and documentation.
All information is provided in PDF format for compatibility with any computer, IOS or android device. As always, a Word version is available to any one that requests it—just drop me an e-mail or PM and I’ll be happy to send it!
Over the past 18 months, we have been testing an aural AOA logic that provides positive feedback to the pilot for all AOA conditions at or above L/Dmax, effectively allowing the pilot to hear the back side of the drag curve. It allows to pilot to easily discern L/Dmax, and, most importantly, ONSPEED. It also provides progressive stall warning (as do all AOA systems). The logic allows the pilot to easily discern between ONSPEED and “fast” or “slow,” which greatly facilitates proper pitch input when optimum turn performance is desired. This is applicable in the traffic pattern as well as during maneuvering flight. We have made a couple of demonstration videos that not only introduce the aural logic, but also serve to demonstrate the utility of having accurate AOA information available during flight.
There is a short, five-minute overview and a 20 plus minute "why/how" video. Links are below for folks that may not have seen them or are interested in learning more about the concepts:
Short Video: https://youtu.be/48ZgOYDQUfk
Long Video: https://youtu.be/-kbA6NxMpmQ
Adapting any AOA System.
Any properly calibrated AOA system can be utilized to achieve L/Dmax and ONSPEED conditions, but testing may be required and the utility of various visual and aural displays varies from system to system. We conducted an Oshkosh forum (long!) on the topic and have a large briefing available that walks through the process. We’re planning to do more of the same next summer for folks that are interested. The forum is available on YouTube at this link: https://youtu.be/WmtnUjWSuBY
As always, I welcome any critique or discussion and I’m always happy to answer questions. These training and reference resources only improve with collaboration. We’ve got a tremendous amount of talent within the Van’s family, and everyone can contribute, regardless of experience. Please feel free to post, PM or email. Also, I’d be remiss if I didn’t thank Doug for making it possible to share the corporate knowledge!