Friday, September 27, 2013

Project Update

Not much has changed since before EAA this year. Got the spinner polished and fit, but progress is slow. Just got it on the scales and worked out the W&B... While the CG works out and the weight is tolerable, I have officially decided to just go back and do all of the airframe mods I wanted to do.

Here is another quick video from the ground testing phase before teardown.


Here is the log file from the ignition. MAP is in kPa showing a max pressure of 189, which translates to 12.71psi of boost or 55.81". 

A couple of interesting take aways... 
- This boost pressure was achieved with 80" throttle. 
-  The timing is set to retard the spark timing from its max advance of 30 degrees at a rate of 1.5 degrees per psi of boost. 
- The timing has a max advance of 40 degrees, which can only be achieved at high rpm and no load. The ignition is tracking and performing well.


My disappointment with not flying it this year is being overcome by excitement of the rest of the airframe mods ; )