Hi guys.
The Glasair SIIRG is near completion and we are taxi testing.
The OAT is rising as we enter summer. Yesterday was 37C ~ 100F.
She can idle forever with water stabilising below 220F and oil below 180F if the OAT is below 70F but not sure yet about the warmer days.
I’m wondering about 3 options and would value your experience and thoughts:
1. Route some more air from the left cheek into the water heat exchange diffuser currently fed by the right cheek. I am currently only using 50% of the left cheek (Blanked off). The other 50% of the left cheek feeds air to the engine. The air is likely not to want to do the gymnastics required to travel the path available. 2. Install another small core fed by the available left cheek air with water from the heater outlet. This would make for easy plumping as far as the water system. I’m not sure how much heat we could reject from that small diameter heater outlet?
3. Install an electric fan on the main exchanger for extended on the ground running. Main concern with fan is, what happens when cruising at up to 200Knots? Appreciate you feedback

Steve Izett
Glasair SIIRG Genesis 4 port RD1C EC2
Perth Western Australia