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Vent and fan size?
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John |
I wrestled with ventilation issues during construction. I have my audio panel over a 430w over an ic210. All stacked close. I rejected cooling fan installations and installed a 'T' fitting on the passenger air vent instead. Some of the ram air from outside goes to the vent but the other half constantly blows over the avionics stack. Louisiana summers are freaking brutal but i have never had a 430 shutdown due to heat.
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I have two computer fans, 3" or 90 mm, I forget which.
Years ago Cessna vented outside air to the avionics in 182s. They stopped doing it after they found rain water was getting in too. |
Update
Well, I installed insulation material on the firewall with no appreciable effect on the heating issue. With the change in the contrast setting, the screen did not fade out. I discussed with Garmin and confirmed that the max contiguous temperature is 55 degrees centigrade and that I should get an on screen warning if the unit gets too hot. So at this point, I will be watching for the warning and screen fade. I plan on obtaining temperature strips to attach to the case to see what the actual temperature is. If it is 55 centigrade degrees or less, I'll leave it be. If not, then venting is in the future.
John |
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John, you said you mounted a "small fan." Is this an overpriced avionics fan or a really small fan? Perhaps the volume of air you're moving through the tube to the cooling port is insufficient.
Also, you might think about where the fan is mounted. Is it pushing hot air (from near the firewall or up higher) to the 430, or cooler air from a lower location? |
does the NAV work? (VOR/ILS)
Mine was overheating, the navboard was fried....everything but VOR and ILS worked (it would tune/ident one, but would never show on CDI) |
I'll be trying two of these. Mounted close to the center radio stack in the forward outboard corners ahead of the panel and before the center subpanel. It was the most common size at the computer store (80mm) and the most quiet. I also got a grill to cover the exposed blades that exactly match the ones on the cooling fans for the Skyviews. Will double as defrosters.
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Update to Update - Problem Solved - Insulation Worked
Quote:
John |
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