Autopilot Servo Installation Guide RV4, RV8 Pitch This product is not approved for installation in type certificated aircraft Document 101046-002, Revision F January, 2013 Copyright © 2009-2013 by Dynon Avionics, Inc.
DYNON AVIONICS Contact Information Dynon Avionics, Inc. 19825 141st Place NE Woodinville, WA 98072 Phone: (425) 402-0433 - 8:00 AM – 5:00 PM (Pacific Time) Monday – Friday Dynon Technical Support available 7:00 AM–4:00 PM (Pacific Time) Monday – Friday Email: support@dynonavionics.com Fax: (425) 984-1751 Dynon Avionics offers online sales, extensive support, and frequently updated information on its products via its Internet sites: www.dynonavionics.com –Dynon Avionics primary web site; including: docs.
DYNON AVIONICS Servo Mounting Instructions – RV-4/8 Fuselage Pitch Kit Kit Contents Dynon Part # QTY Part Description 100836-000 2 Large Male Rod End 100874-000 1 RV4,8 Pitch Bracket - Right 100874-001 1 RV4,8 Pitch Bracket - Left 100966-000 1 Aluminum Pushrod Tube - 2.
DYNON AVIONICS location of the bell crank mounting holes. Remove the original brackets and clamp the new brackets to the match-drill plate along the same edge and with the bell crank mounting holes aligned with the reference mark. Flip the brackets and match drilling plate upside down, and drill new rivet holes in the brackets. You may wish to trial assemble the pitch bracket assembly, as shown on page 8.
DYNON AVIONICS Thread both large rod ends with jam nuts into the supplied 2.25" tube. Standard mounting of the linkage to the servo arm will include the AN3H-10A bolt, AN970-3 large diameter flat washer (for capturing the rod end bearing), 2 AN960-10 flat washers on each side of the servo arm itself, and the AN365-1032A lock nut. The other end of the linkage will require the same type of stack-up, using the longer AN3H-11A bolt and capturing the washer sandwiched between the halves of the bell crank.
DYNON AVIONICS Wiring Overview The following diagram provides an overview of the autopilot-specific wiring installation. For the complete set of wiring and configuration instructions, please see the latest Installation Guide for your Dynon EFIS product. For a SkyView system please reference the Autopilot Servo Installation, Configuration, and Calibration chapter of your SkyView System Installation guide.
DYNON AVIONICS Servo Dimensions Use the following dimensions (in inches) for reference when planning and implementing your installation. Long-arm variants (not needed in most installations)have linkage mount holes at 1.5”, 1.75”, and 2.0” L Servo Mounting Instructions – RV-4/8 Pitch Kit 101046-002 Rev F Weight SV32 2.17” 2 lb SV42 3.10” 3 lb SV52 4.
DYNON AVIONICS Linkage mount position force and travel The diagram below illustrates the maximum travel and force available at each linkage mounting point. As can be seen, the closer you mount the linkage to the shaft, the more force the servo can deliver. However, this also means the travel of the arm is shorter. Again, ensure that the servo arm is nowhere near going over-center throughout the entire range of the control system. Position A should be used in most RV-4/8 pitch installations.
DYNON AVIONICS Mounting Drawings The following pages provide detailed views of the mounting and assembly of the servo and this kit. Two sets of diagrams are shown for the assembled kit: 1. All RV-4 fuselages. All RV-8 fuselages built from kits manufactured prior to September 2006. 2. All RV-8 fuselages built from kits manufactured after September 2006. The bell crank drill location is the same for both kits.
DYNON AVIONICS RV-4 and Pre-Sept-2006 RV-8 Exploded View Servo Mounting Instructions – RV-4/8 Pitch Kit 101046-002 Rev F 9
DYNON AVIONICS RV-4 and Pre-Sept-2006 RV-8 Assembled View Servo Mounting Instructions – RV-4/8 Pitch Kit 101046-002 Rev F 10
DYNON AVIONICS RV-4 and Pre-Sept-2006 RV-8 Pushrod Spacing View Servo Mounting Instructions – RV-4/8 Pitch Kit 101046-002 Rev F 11
DYNON AVIONICS Post-Sept-2006 RV-8 Exploded View Servo Mounting Instructions – RV-4/8 Pitch Kit 101046-002 Rev F 12
DYNON AVIONICS Post-Sept-2006 RV-8 Assembled Side View This view shows the idea pushrod spacing as well as the bell crank drill hole location.
DYNON AVIONICS Post-Sept-2006 RV-8 Assembled Back View Servo Mounting Instructions – RV-4/8 Pitch Kit 101046-002 Rev F 14
