Engine Cooling Runner Diversion Duct Glassing

Here you can see we’ve added angled ducts to the sides of my NACA runners. I hope to do two things here, well, maybe three. I don’t want to suck rain (1) into the engine, so I was moving to the side discharge. I would also like to get better ram air flow (2) into […]

New Engine Cooling Plenum

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. […]

New Engine Cooling Plenum – Rear Extension

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 […]

More Cabin Heating from Engine Oil

Here are some pictures for you of the new heater installation. Here you can see the new duct that replaces the one from the NACA and accepts the air from the bilge fan. We still use the standard flapper valve to take the air to the keel or dump it overboard. In the keel we […]

Engine Air Cleaner – Round

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 […]

Forming NACA Runner Diversion Ducts

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 […]