It is great to see collaboration of a common design emerging for builders to use and remove some of the experimental risk of a build while adding durability and reliability to our birds. Congrats to all who contributed!!!
Originally Posted by DanH
Prediction: Near the divider will be much cooler than any lower cowl location when in flight, and not worse when parked hot.
Having lots of temperature data recorded, I will have to agree with Dan. Although the heads are higher it seems the case, barrels are the dominant driver of the under cowl, under plenum temperatures. I don't have the southern absolute temps but the shut downs seem to follow case and oil temps less than the heads, in my data.
Originally Posted by TS Flightlines
.. . . So we set out to test this idea. 2 airshow seasons with members of an well known show team with good results in 3 variations.
WE have a bunch of these flying around the world with no issues. The one part that did need some help was making a securing bracket that would work for that application. Dan Horton did a great job of this. Again, not for everyone, but better than it was. . . .
Tom, we have heat/temps, internal flow and fluids, fundamental structural of the mounts, and lastly vibration of the cube. Vibration of the small displacement high kind would be the one of concern since it is rigidly attached to the case. It is a fundamental question for anything that gets bolted directly to any engine.
So - was one of the configurations you tested in the field this mount structure? If so that would eliminate that as a potential issue.
There have been many rigidly attached to the lower structure and they seem to be working quite well. The only thing we could do better is measure the vibration of the cube and it's mounts.