Wed Jun 23, 2021 5:23 pm
#1854713
Interested in this subject, we have just fitted a sensitive detector in our Jodel (following an engine rebuild). Is it the case, that you want to see 0 on the detector during flight, or what is the expected experience of other users of devices where you can see the actual ppm displayed?
In our initial test flights post-rebuild, we are seeing from 15-25 regularly and depending on how we set the vents, max 75 ppm once. We don't know what we had prior to the rebuild as didn't have the detector then......
We are looking at the engine bay and underside panels as the culprits, the Jodel tends to 'suck' air into the cabin and potentially we have an unsealed panel somewhere below - the two exhausts run externally along the bottom of the fuselage and vent directly below the seats (through a perforated tube).
I have seen that exposure (over time) of >35ppm is not healthy. I would rather not be exposed to any, but is it realistic to expect say 0, 15ppm or whatever during normal flight operations. Just wondering how far we need to go to investigate and remedy.
Interestingly, we know its not the heater pipes - integrated with the frontal exhaust section - when we were testing readings during flight, the opening of cabin vent and heater vent *improved /lowered* the detected ppm, suggesting it alleviated the 'suck' of the cabin from outside.
We are going to check the firewall and underside panels for seals.
Anybody else with a Jodel and CO detector?