New video, and the most efficient thing in his cooling system is the heater. I was surprised he’s still opening it as that is distorting his numbers and performance.
I’m really not clear on why his heater works so well to drop coolant temps...something really doesn’t seem right there.
The heater is most likely thin enough to be able to drive significant air through it, and thus reject a significant dose of heat. It does seem to be rejecting as much or more heat than the base radiator and duct scheme.
Early on temperature vs time data was being shared, but flight conditions were constantly changing, so estimating delta T's and time constants were impossible to determine. Now thermal performance data is not being shared, so we are in the dark.
The coolant temperature drops we have seen have been largely a matter of having the heater loop cold, and suddenly opening the loop, so that dose of cold coolant is dumped on the system, giving a quick cool. After the heater loop has been on for a bit, temps do climb again.
Billski