istrumit
Well Known Member
I have noticed that my OAT, which is located in the fresh air scoop on the copilot side, never reads what the weather service forecasts. It always reads higher by several degrees.
I believe, but I am not sure, that the front air vents also seem let in warmer air than I expect based on my altitude. I will measure this to confirm.
But, I suspect my OAT is reading high because, unlike most RV-10s, I have two sets of cowling vents. I have the standard bottom ones, but also side ones on the bottom cowling, about 3 inches below where the top and bottom cowlings meet (9.5:1 pistons, so I am guessing the builder was trying to enhance cooling).
I think hot air from the cowling exit is mixing with outside air and entering the fresh air vents.
First - Does this seem like a reasonable suspicion ?
And Two - where to relocate the probe if needed ?
Thanks,
Scott
I believe, but I am not sure, that the front air vents also seem let in warmer air than I expect based on my altitude. I will measure this to confirm.
But, I suspect my OAT is reading high because, unlike most RV-10s, I have two sets of cowling vents. I have the standard bottom ones, but also side ones on the bottom cowling, about 3 inches below where the top and bottom cowlings meet (9.5:1 pistons, so I am guessing the builder was trying to enhance cooling).
I think hot air from the cowling exit is mixing with outside air and entering the fresh air vents.
First - Does this seem like a reasonable suspicion ?
And Two - where to relocate the probe if needed ?
Thanks,
Scott