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Silger Sonex

Build Log for Sonex 0849B

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  • Card B – EFIS/EMS Setup and Calibration

    Card B – EFIS/EMS Setup and Calibration

    July 30, 2026

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    Flight Testing

    Procedures: Results: Engine Sensor Testing Sensor Ground Test Set Limits RPM ✔ Normal: 900 – 3300 Max: 3300 Manifold Pressure Not Installed Not Installed CHT ✔ Normal: 200 – 356 Caution: 356 – 392 Max: 392 EGT ✔ Normal: 1112…

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  • Seatbelt Installation – Part 2

    Seatbelt Installation – Part 2

    July 30, 2026

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    SNB-F04: Seatbelt Installation

    Updrilled shoulder harness attach points to 5/16″ and bolted seatbelt shoulder harnesses with AN5 hardware. Applied torque seal to bolts. Hours Worked:0.42

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  • Fuselage Side Panels and Wrap-up

    Fuselage Side Panels and Wrap-up

    July 30, 2026

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    SNB-F01: Fuselage Complete

    Tweaked fitment of RH side panel by trimming a little more off of the rear side of the panel. Attached Velcro strips to back and bottom of side panel and upper longeron and seat pans. Installed side panel and checked…

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  • Fuselage Side Panels – Part 2

    Fuselage Side Panels – Part 2

    July 29, 2026

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    SNB-F01: Fuselage Complete

    Trimmed lower and upper seat pans for better clearance of wire bundles and side panels. Test fit RH side panel and trimmed a couple more places for better wire clearance. Hours Worked: 1.00

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  • Autopilot Wrap-up and Smoke System Wiring

    Autopilot Wrap-up and Smoke System Wiring

    July 29, 2026

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    SNB-E01: Avionics & Electrical

    Finished wiring auto pilot harness. Calibrated servos through the SkyView menu but when the auto pilot test was conducted, the pitch servo could be heard slipping consistently. Took video and sent to Dynon support. Talked with Steven from Dynon Support…

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  • Cowl Nutplates and Oil Door Fabrication

    Cowl Nutplates and Oil Door Fabrication

    July 29, 2026

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    SNB-P13: Cowling

    Updrilled cowl shelf, lower cowl, and upper cowl, and drilled and riveted nut plates onto cowl shelf and lower cowl. Temporarily installed upper cowl onto aircraft with screws to verify alignment and fitment; checks good. Located oil dipstick with flashlight…

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  • Engine Baffle Installation – Part 3

    Engine Baffle Installation – Part 3

    July 28, 2026

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    SNB-P01: Engine Installation

    Removed AeroInjector needle carrier and replaced stock #2 needle with recommended #3 needle. Reinstalled needle carrier and set needle setting per manual by marking start of taper and aligning it with top of throttle slide. Reinstalled set screw and dust…

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  • Firewall Sealant and Engine Preheat Wiring

    Firewall Sealant and Engine Preheat Wiring

    July 27, 2026

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    SNB-P01: Engine Installation

    Removed wire grommet covers from firewall for fear of wire chaffing and riveted open holes closed. Riveted upper cowl shelf to windshield skirt. Applied 3M Fire Barrier Sealant CP 25WB+ to gaps in firewall around motor mounts and on seam…

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  • Fuel Line Insulation

    Fuel Line Insulation

    July 27, 2026

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    SNB-G01: Fuel System

    Added fire sleeve insulation to fuel lines forward of firewall. Used smaller size (5/8″) for hard lines and flex hose and separate larger size (1.5″) for fuel filter. Secured sleeves with zip ties. Fuel system complete! Hours Worked: 0.64

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  • Smoke System Plumbing

    Smoke System Plumbing

    July 27, 2026

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    Smoke System

    Began smoke system installation by drilling 5/8″ holes in exhaust pipes as far up as possible. Cut stainless steel mount plates out of firewall scrap and drilled 1/2″ hole in center of plates. Assembled sprayers with plates using machine bushings…

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  • Cowl Fiberglass Work – Part 9

    Cowl Fiberglass Work – Part 9

    July 24, 2026

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    SNB-P13: Cowling

    Rough sanded micro on upper cowl then final sanded; upper cowl should be finished with most micro work. Added micro to two low spots on lower cowl and let micro set. Fine sanded the two spots on the lower cowl…

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  • Cowl Fiberglass Work – Part 8

    Cowl Fiberglass Work – Part 8

    July 18, 2026

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    SNB-P13: Cowling

    Removed upper and lower cowls from fuselage and removed packing tape from fuselage. Rough sanded new micro; most spots very close to being done with fiberglass but a couple of spots needed more filler. Leaving cowls off of aircraft, mixed…

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Silger Sonex

Build Log for Sonex 0849B

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Warning: The information and documentation provided on this blog regarding the construction of an experimental aircraft are for reference and informational purposes only. The author assumes no liability for any injury, death, or damage resulting from the use of this information. Build and operate at your own risk.