Monday, December 27, 2021

Finishing tasks

 Today I finished calibrating the fuel sensors and gauges.  The Princeton probes had been programmed as 5 point but the 1S (one set point) work better with a modern EFIS.  So following the procedure to ground the yellow wire and hold the button while powering on, changed the mode to 1S.   Then with each tank empty, set the empty point and the probes were ready for the Dynon calibration process.   Dynon has you specify the tank capacity, start with the tank empty, then ad fuel in 2 gallon increments until the tank is full.  My tanks appear to hold a bit over 27 gallons.    I disconnected the line at the engine fuel distribution block and connected a temporary hose to it.  I used the hose to pump fuel out of the full tank into the empty tank.   The pump would pump approximately 1 gallon/minute.   I'd also marked some temporary tape on the site gauges for a reference to cross check.

The starter ring gear has a couple teeth broken off.   A friend suggested lite props are culprits and another fellow said the ignition not retarding can be a culprit.   I got a new Superior ring gear from Aeroperformance and set the timing to 0 degrees for the lower RPM ranges.

I had a nice smooth idle at around 450 RPM.  The oil pressure was 50 .lbs, volts and amps  were good.

The cowls seem to be easier to get on and off.  

I used 1" BID tape to secure the interior fuel lines.  I also secured the fuel tank vent lines.

I continue to look for things the DAR looks for, like loose bolts and nuts, missing safety wire, proper amount of threads exposed on bolts.