Tuesday, November 2, 2021

Nov 2 2021 update

The task list was resorted and show about 20 items to complete before scheduling the DAR.

There's probably 40 or so cosmetic items (non-essential for flight), such as wheel pants, paint touch up etc.

Recently the vortilons (required) were attached and also the trailing edge fences (optional).

The Dynon EMS 220 gear and canopy contact wires were run.   After discovering that the contact is pulled up to 5 volts internally and that my original voltage divider network's resistance was to high to pull the 5 volts down, I tried a 30k ohm to the green LED Gear Down positive lead, then the gear contact wire with a 10k ohm resistor going to ground.   So when the gear is down (Green LED/+12 volts), the contact lead is pulled high.   Without the positive voltage, the 10K resistor pulls the signal down to about 2 volts.   The value is configurable, so the Gear widget will be set to be green when the voltage is above 3 volts and red below 3 volts.   Additional settings in aircraft type (retractable) and gear speeds will be set so audible and visual warnings will be annunciated along with the LED status on the landing gear panel.   

The Gear warning is important but not as critical as the Canopy warning, which remains on the task list.  Lessons learned from the Gear contacts are very helpful going forward with any other contacts being added to the system.

The SDS fuel mapping settings previously were at 153 but the mixture knob was used to lean for smoother running.   I adjusted the values to 147 and also reduced the timing for lower RPMs.  Above 1400 RPM, the timing is set to 20 degrees as stamped on the data plate.  The setting to 2 pulses per revolution seem to be accurate but the resolution of the SDS programmer doesn't seem to be as high as the Dynon, so they can be several hundred RPM different, but at least not double or half of each other.

I made an inquiry on the Cozy Builder Group about logging information.  Specifically, where to make entries for the EI/EFI system.   Marc Zeitlin provided a response and examples that were helpful:

https://groups.google.com/g/cozy_builders/c/mHehfxwsKuk/m/_Y8qupajAAAJ

A Kenda 3.00 x 10 tire and tube were installed since the Aeroclassic tire was over 10 years old, and it was pretty hard.

The canopy latch hardware was reinstalled.

I'd purchased a new Quite Halo in-ear headset as my old Status headset ear pads were falling apart.