So, we’re building this new cooling plenum. My engine always cooled fine, but I had issues with the runner to NACA junction and the plenum was a little fragile the way I had cut the built the runner-to-plenum junctions. I also wasn’t very happy with the wire grommet or spark plug and oil filler access. […]
Read More
Here you can see we’ve extended the cooling plenum onto the engine. You can see we’ve used my buddy Andy’s trick of waxing the engine so the glass doesn’t stick. Andy has gone to a bunch more effort to seal off his engine, but since we didn’t have cooling issues before, and we expect our […]
Read More
Obsolete: We are currently running without an air filter as it restricted engine RPM. We’ve decided to redo our engine air system and include a air filter, though it isn’t specifically called for in the manaul. Along the way I’m adding side diverging exits from the NACA ducts, and redoing our cooling plenum to allow for […]
Read More
The runner modifications are nearly done now, the hinges are on to mate the two halves together, and the stubs are firmly bonded to the fuselage. The only thing remaining is to add the new ducts for the engine and oil cooler on the side of the runners. Forming the duct glassed extensions Runner stub […]
Read More
We’ve moved both the engine air intake and the rear oil cooler intakes from the bottom to the sides, and have made slanted pick-ups that should improve the airflow. Since the premolded engine cooling NACA ducts don’t seem to be covered elsewhere in the manual, I’ll include them here. Much of the cutting was completed […]
Read More
We decided to move our combustion air and firewall oil cooler runner ducts from flat bottom-facing duct connections to side exiting ducts. We’re also making the ends permanently attached to the firewall so they are very rigid, as we’d had issues with them pulling the cowl screw out and collapsing. We’re also added a little […]
Read More