Induction Inlets

Over the last week or so, I have been working on my induction inlet for both front and rear engine. The design of it comes from my day long visit with Dave Anders, of worlds fastest RV-4 fame. He has written many articles for Kitplanes and is very upfront about the science he uses. OneContinue reading “Induction Inlets”

Front Engine Oil Cooler Duct

Over the last many days, I have worked on the front engine oil cooler duct. It is a simple part, but has taken a few cure cycles to make. I broke the part down into multiple pieces to make it easier to fabricate. Just like the rear engine diffusers, I decided to make the ductContinue reading “Front Engine Oil Cooler Duct”

Rear Engine: Plenum Diffusers and Cowl doesn’t fit

Kevin and I spent most the day at the hangar on Saturday. We were able to get a lot done. When we separated the rear engine plenum diffusers from their plugs, the fiberglass released from the vinyl tape on half of each diffuser. On the other half, it stuck tenaciously. I have never had thisContinue reading “Rear Engine: Plenum Diffusers and Cowl doesn’t fit”

Diffusers & More, and lets try video

I am going to be trying something a little different with the blog. A few people have suggested and/or given me advice on how to add video to the blog to make it a bit more engaging for folks. So I am going to give that a try. I took some time lapse video overContinue reading “Diffusers & More, and lets try video”

Walking the Defiant

We interrupt our regularly scheduled programming…. to walk the Defiant. Today was musical hangars with the airplanes. I got sick and tired of going back and forth between the hangars to fetch this or get that. Invariably the tool I needed was never in the hangar where I needed it. With a little creative hangar-ingContinue reading “Walking the Defiant”

Cooling Plenums

By definition a twin-engine airplane requires installing two engines. But most twins can use the same install in each nacelle, making for less work. With the Defiant, we have a push and a pull engine. Ideally we will try to make them as much alike as possible, but to get the most performance out ofContinue reading “Cooling Plenums”

Brian’s Defiant Derivative Aircraft

The plans built Defiant was in a lot of ways a prototype or proof of concept, as Burt Rutan was known for not “finishing” or iterating his early designs into a production aircraft. In fact, Burt’s claim to fame was quickly flying new ideas and furthering aerospace technology, not getting bogged down in a singleContinue reading “Brian’s Defiant Derivative Aircraft”

Oil Cooler Replacement

I mentioned in the last post that after getting the wheel pants on Betty, the airplane was ALMOST ready to fly. The reason it wasn’t fully ready was during the wheel pant installation I removed the cowl. When I removed the cowl, I found this floating around inside the bottom cowl. When I initially foundContinue reading “Oil Cooler Replacement”