Oct 24, 2023     Final Fuel Flow Test - (3 hours) Category: Inspection

Fuel flow tested again, per FAA guidlines, at climb attitude and at level flight attitude.
At Climb attitude 18 degrees nose up as outlined in the bearhawk build manual
2.5 gallons of fuel was placed in each tank and the fuel was collected at the fuel line/carb attach fitting.
Fuel was collected for one minute and weighed

Engine fuel demand at full power climb 26.6 gph (290hp x 0.55) / 6
Ideal gravity fuel flow test result 39.9 gph (26.6 x 1.5)

Test results:
Climb fuel flow 49 gph
Level flight fuel flow 68 gph

Robert Tyler Williams, Builder

  Oct 24, 2023     Final Inspection - (10 hours) Category: Inspection

Pulled all inspection panels off airplane. Removed seats and floors. Vacuumed interior. Inspected all fittings, checked control surface deflections and cable tensions, safety wired all fittings where necessary, and all turnbuckles, checked all systems for correct function, controls checked for correct function, FWF inspected for leaks and all fittings torqued. I certify that this aircraft has been inpected in accordance with the scope and detaiil of 14 CFR part 43, appendix D, and was found to be in a condition for safe operation.
Robert Tyler Williams, Builder

  Oct 24, 2023     Final fittings and screws - (4 hours) Category: Fuselage

Installed remaining screws after completing fabrication of gap seals, covers, wingtips etc. Installed boot cowl final rivets by door frames.

Robert Tyler Williams, Builder

  Oct 22, 2023     Ground Run - (3 hours) Category: Engine

Retimed the mags several times due to hard starting. Discovered the engine needed more fuel during starter rotation. Successfully started and ran engine per instructions for first start, provided by manufacturer, R and B aircraft. Checked for leaks

Robert Tyler Williams, Builder

  Oct 21, 2023     Weight and Balance - (2 hours) Category: Inspection

Completed weight and balance per FAA guidlines. Airplane at level attitude and leading edge of the wing as datum. Weight and balance information included with certification information and also is with the aircraft.

Robert Tyler Williams, Builder

  Oct 21, 2023     Firewall forward inspection and pre start oil - (10 hours) Category: Engine

Rechecked mag timing. Safety wired all necessary attachments and fittings. Fill engine with mineral oil and calibrated dipstick. Filled oil cooler. Filled oil pressure line and had to use a wire plunger to get oil to flow into the line. Removed bottom spark plugs and cranked engine until oil pressure showed on EMS.

Robert Tyler Williams, Builder

  Oct 16, 2023     Fuel Flow Test - (1 hour) Category: Fuel System

Fuel Test Report
At Climb attitude 18 degrees nose up as outlined in the bearhawk build manual
2.5 gallons of fuel was placed in each tank and the fuel was collected at the fuel line/carb attach fitting.
Fuel was collected for one minute and weighed

Engine fuel demand at full power climb 26.6 gph (290hp x 0.55) / 6
Ideal gravity fuel flow test result 39.9 gph (26.6 x 1.5)

* Note: Aircraft and fuel system designer recommends fuel selector on BOTH position for takeoff and landing


Fuel Selector Position GPH
Both 49
Right 31.5
Left 32.5

Robert Tyler Williams, Builder

  Oct 09, 2023     Glare shield - (6 hours) Category: Instrument Panel

Installed glare shield access panel and fabricated trim and cover for glare shield with vinyl leather and open cell foam padding.

Robert Tyler Williams, Builder

  Oct 09, 2023     Control rigging - (4 hours) Category: Controls

Final install of flaps and ailerons completed. Rigged controls with deflection ranged called out in the plans.

Robert Tyler Williams, Builder

  Oct 09, 2023     OAT probe installation - (1 hour) Category: Avionics

Installed OAT probe in left wing tip and plugged into remote compass, per instructions from Dynon/Advanced Flight Systems. Checked function.

Robert Tyler Williams, Builder