Remember you’ve got a lot of hot air exiting your cabin heater when it’s not sending heated air into the cabin to warm your feet. My old O-1 Birddog had two of this style heater valve and the high temp paint was cooked off the metal units.
Derek, i agree with Rob man. I never question you. I just do exactly what you do on this build BUT I'm an instrument technician and no electronics, mil-spec or otherwise can handle any more than 85 deg c. Heat shield or not. On the ground we have 750 deg c exhaust temp radiating right next to that instrument. There is a calc you can do for heat dispersion over distance but gut feel, it's not enough. I'm not running fuel flow on my build. I don't trust the buggers and don't see a benefit.
Thank you for the insight. I was aware of the hot exit air, which is why it is mounted below the direct exit path and figured if that much heat is diverted inside, it would cause damage inside as well (ignition boxes)? I will look into making a diverter for the exit air (and cross my fingers), since I can't think off any other mounting location that don't violate other installation no-no's. FWIW, like a lot of us, I'm a first time builder just posting this stuff to get great feedback like this. I'm humbled and honored that you are copying, but just make sure you do your own research and confirm any building decisions on your own ;)
Remember you’ve got a lot of hot air exiting your cabin heater when it’s not sending heated air into the cabin to warm your feet. My old O-1 Birddog had two of this style heater valve and the high temp paint was cooked off the metal units.
Derek, i agree with Rob man. I never question you. I just do exactly what you do on this build BUT I'm an instrument technician and no electronics, mil-spec or otherwise can handle any more than 85 deg c. Heat shield or not. On the ground we have 750 deg c exhaust temp radiating right next to that instrument. There is a calc you can do for heat dispersion over distance but gut feel, it's not enough.
I'm not running fuel flow on my build. I don't trust the buggers and don't see a benefit.
Thank you for the insight. I was aware of the hot exit air, which is why it is mounted below the direct exit path and figured if that much heat is diverted inside, it would cause damage inside as well (ignition boxes)?
I will look into making a diverter for the exit air (and cross my fingers), since I can't think off any other mounting location that don't violate other installation no-no's.
FWIW, like a lot of us, I'm a first time builder just posting this stuff to get great feedback like this. I'm humbled and honored that you are copying, but just make sure you do your own research and confirm any building decisions on your own ;)