Been reading and thinking about fuel issues on several airplanes; found some Rube Goldberg solutions when it seems to me that the issues (high wing aircraft) are about venting adequately while having sufficient diameter in the fuel line to the selector valve to allow bubbles/vapor to rise without "locking" the line, stopping flow.
Some vent solutions seem to allow siphoning fuel into the slipstream during flight while others potentially allow entry of water (rain) under some conditions, either at the cap or the vent line exit. I just finished reading some info from the Cessna Pilots Association about "killer caps" that allow rain water through the vent into the tank on some models, then, due to wrinkles in the bottom of the fuel bladder holding water (being heavier than fuel) that even sumping during the pre flight didn't prevent water being gulped into the engine during flight, with the predictable result of total engine stoppage.
What is a safe way to vent a wing tank without possible allowing water entry or siphoning into the slip stream during flight?
Some vent solutions seem to allow siphoning fuel into the slipstream during flight while others potentially allow entry of water (rain) under some conditions, either at the cap or the vent line exit. I just finished reading some info from the Cessna Pilots Association about "killer caps" that allow rain water through the vent into the tank on some models, then, due to wrinkles in the bottom of the fuel bladder holding water (being heavier than fuel) that even sumping during the pre flight didn't prevent water being gulped into the engine during flight, with the predictable result of total engine stoppage.
What is a safe way to vent a wing tank without possible allowing water entry or siphoning into the slip stream during flight?
