Yikes, I seemed to have rattled some nerves.
My point to Freemasm was fuel pumps can be insanely reliable devices. Having only one fuel pump doesn't bother me in the slightest if it's extremely reliable. Lycomings historically have two pumps because the engine driven diaphragm pumps aren't the most reliable. Lycoming engine driven pumps are low pressure. PT-6 high pressure pumps are ~800 PSI. Diesel truck pumps are ~30,000 PSI. Which one is the least reliable? The lowest pressure of them all, the engine driven Lycoming pump.
While DI might or might not be the best for aviation, fuel pump reliability and redundancy isn't the reason why. There's thousands of airliners flying around with only one high pressure fuel pump per engine, and some of them have ETOPS level reliability (speaking to PW100 series engines). Thousands (millions?) of trucks driving around with only one high pressure fuel pump. Not many of them of them seem to be littering the side of highways.
Now I'll sit back down and let the adults talk about how to play nice with others.
My point to Freemasm was fuel pumps can be insanely reliable devices. Having only one fuel pump doesn't bother me in the slightest if it's extremely reliable. Lycomings historically have two pumps because the engine driven diaphragm pumps aren't the most reliable. Lycoming engine driven pumps are low pressure. PT-6 high pressure pumps are ~800 PSI. Diesel truck pumps are ~30,000 PSI. Which one is the least reliable? The lowest pressure of them all, the engine driven Lycoming pump.
While DI might or might not be the best for aviation, fuel pump reliability and redundancy isn't the reason why. There's thousands of airliners flying around with only one high pressure fuel pump per engine, and some of them have ETOPS level reliability (speaking to PW100 series engines). Thousands (millions?) of trucks driving around with only one high pressure fuel pump. Not many of them of them seem to be littering the side of highways.
Now I'll sit back down and let the adults talk about how to play nice with others.