The oil temperatures on the RV-10 are good - probably 200 in cruise on a hot day, but I'd love for them to be cooler. With that in mind, I'm thinking about how to increase airflow to the oil cooler. It is currently fed by a 4" SCAT tube pulling air off of the rear engine baffle and feeding it into a plenum that feeds the oil cooler. The SCAT tube is about 14" long and makes a 70 degree turn.
My first thought is that the corrugations on the SCAT have to reduce the airflow. Any thoughts on either making a smooth 70 degree transition out of fiberglass with a short section of flex (SCAT or a flexible vinyl seal) to handle the relative motion between the engine and oil cooler. Alternately, a vinyl/fiberglass sock that is flexible for its entire length, but is smooth sided internally? Any suggestions on fabricating either approach? Maybe there's a better approach entirely - any ideas?
I'm also considering a velocity stack/ring to smooth the airflow as it transitions into the duct from the baffles.
Thoughts?
My first thought is that the corrugations on the SCAT have to reduce the airflow. Any thoughts on either making a smooth 70 degree transition out of fiberglass with a short section of flex (SCAT or a flexible vinyl seal) to handle the relative motion between the engine and oil cooler. Alternately, a vinyl/fiberglass sock that is flexible for its entire length, but is smooth sided internally? Any suggestions on fabricating either approach? Maybe there's a better approach entirely - any ideas?
I'm also considering a velocity stack/ring to smooth the airflow as it transitions into the duct from the baffles.
Thoughts?
