@dtidmore, great job, nicely done. One question, due to the low airflow, is there not a possibility of an airflow short circuit between intake and exhaust?
The airflow volume IS limited and it is downward, so I can't totally state as fact that there is no potential for an airflow short circuit, but remember that the propellor and its duct is a couple of plates BELOW the temp/humidity sensor. The way I constructed the duct, the prop pulls primarily from 2 plates above it and exhausts out the plate below, so I believe I have minimized the chance for the exhaust to circle back and re-enter the solar rad shield. I have some pretty good data on Osprey temp/humidity sensor and have both of them calibrated to fall almost on top of the CWOP analysis so any problems should be pretty easy to spot. Time will tell...