Tuesday, July 2, 2019

Finish Kit (and other kits for Final Assembly)

Engine RPM and Prop Control ( 3 hrs )

Success!  Ran engine for another few minutes w/ correct RPM set up in config (ref July 1 log).  Terry Moushon was great assistance again.  After stabilized at 1200 RPM, opened throttles to 1700 RPM to test Prop Control.  No response at first, so raised RPM to 1800.  Began responding to input - with changes immediately.  Next did R Mag and L Mag checks.  Each dropped ~100 RPM (OK).  Returned to 1200 RPM, then lowered to 900 RPM to check robustness of idle.  Didn't go lower, since the CHTs were now at 250F.  Slowly reduced mixture to ICO (idle cut off) to stop.  After returning plane to hangar, masked top of Rudder and VS and sprayed grey primer ( Cromax Quick Prime A-4240S) to protect epoxy filler from UV.   Recently, Terry noticed I had original diameter (.120") hinge pins for top cowl attach.  His RV10 instructions had him replace with .090" diameter pins - which are much easier to insert/remove (while reaching inside via oil door).  My instructions had me use full diameter pins...but I did find another Vans doc that clearly instructs builders to use .090".  Sterling at Vans builder support confirmed the RV14 instructions changed from prior convention, retaining the .120" so the cowl does not slightly "lift" during flight as top is pressurized.  He noted optional to use .090" since easier to insert.   Since I'll be assembling cowling frequently over next few weeks, I built 2 pins w/ smaller diameter...to try.  Finally, I removed remaining plastic film from Canopy.  Sweet !    Since really hot and humid (again!), went home to download SD card to review engine run data.
Primer over epoxy filler so UV doesn't affect


Surprised how much removing the plastic film on
Canopy improved appearance!

Gotta clean the dust off glareshield...